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-rw-r--r--drivers/hwmon/Kconfig20
-rw-r--r--drivers/hwmon/Makefile2
-rw-r--r--drivers/hwmon/coretemp.c28
-rw-r--r--drivers/hwmon/gpio-fan.c558
-rw-r--r--drivers/hwmon/hp_accel.c32
-rw-r--r--drivers/hwmon/lis3lv02d.c364
-rw-r--r--drivers/hwmon/lis3lv02d.h47
-rw-r--r--drivers/hwmon/lis3lv02d_i2c.c132
-rw-r--r--drivers/hwmon/lis3lv02d_spi.c5
-rw-r--r--drivers/hwmon/ltc4261.c315
-rw-r--r--drivers/hwmon/pkgtemp.c32
-rw-r--r--drivers/hwmon/via-cputemp.c11
12 files changed, 1416 insertions, 130 deletions
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index e382da3122b..c357c835eb1 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -399,6 +399,15 @@ config SENSORS_GL520SM
This driver can also be built as a module. If so, the module
will be called gl520sm.
+config SENSORS_GPIO_FAN
+ tristate "GPIO fan"
+ depends on GENERIC_GPIO
+ help
+ If you say yes here you get support for fans connected to GPIO lines.
+
+ This driver can also be built as a module. If so, the module
+ will be called gpio-fan.
+
config SENSORS_CORETEMP
tristate "Intel Core/Core2/Atom temperature sensor"
depends on X86 && PCI && EXPERIMENTAL
@@ -654,6 +663,17 @@ config SENSORS_LTC4245
This driver can also be built as a module. If so, the module will
be called ltc4245.
+config SENSORS_LTC4261
+ tristate "Linear Technology LTC4261"
+ depends on I2C && EXPERIMENTAL
+ default n
+ help
+ If you say yes here you get support for Linear Technology LTC4261
+ Negative Voltage Hot Swap Controller I2C interface.
+
+ This driver can also be built as a module. If so, the module will
+ be called ltc4261.
+
config SENSORS_LM95241
tristate "National Semiconductor LM95241 sensor chip"
depends on I2C
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index ec9cb735c89..d30f0f6870e 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -51,6 +51,7 @@ obj-$(CONFIG_SENSORS_FSCHMD) += fschmd.o
obj-$(CONFIG_SENSORS_G760A) += g760a.o
obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o
obj-$(CONFIG_SENSORS_GL520SM) += gl520sm.o
+obj-$(CONFIG_SENSORS_GPIO_FAN) += gpio-fan.o
obj-$(CONFIG_SENSORS_ULTRA45) += ultra45_env.o
obj-$(CONFIG_SENSORS_I5K_AMB) += i5k_amb.o
obj-$(CONFIG_SENSORS_IBMAEM) += ibmaem.o
@@ -79,6 +80,7 @@ obj-$(CONFIG_SENSORS_LM93) += lm93.o
obj-$(CONFIG_SENSORS_LM95241) += lm95241.o
obj-$(CONFIG_SENSORS_LTC4215) += ltc4215.o
obj-$(CONFIG_SENSORS_LTC4245) += ltc4245.o
+obj-$(CONFIG_SENSORS_LTC4261) += ltc4261.o
obj-$(CONFIG_SENSORS_MAX1111) += max1111.o
obj-$(CONFIG_SENSORS_MAX1619) += max1619.o
obj-$(CONFIG_SENSORS_MAX6650) += max6650.o
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
index a23b17a78ac..42de98d73ff 100644
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -21,7 +21,6 @@
*/
#include <linux/module.h>
-#include <linux/delay.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
@@ -280,11 +279,9 @@ static int __devinit get_tjmax(struct cpuinfo_x86 *c, u32 id,
case 0x1a:
dev_warn(dev, "TjMax is assumed as 100 C!\n");
return 100000;
- break;
case 0x17:
case 0x1c: /* Atom CPUs */
return adjust_tjmax(c, id, dev);
- break;
default:
dev_warn(dev, "CPU (model=0x%x) is not supported yet,"
" using default TjMax of 100C.\n", c->x86_model);
@@ -292,6 +289,15 @@ static int __devinit get_tjmax(struct cpuinfo_x86 *c, u32 id,
}
}
+static void __devinit get_ucode_rev_on_cpu(void *edx)
+{
+ u32 eax;
+
+ wrmsr(MSR_IA32_UCODE_REV, 0, 0);
+ sync_core();
+ rdmsr(MSR_IA32_UCODE_REV, eax, *(u32 *)edx);
+}
+
static int __devinit coretemp_probe(struct platform_device *pdev)
{
struct coretemp_data *data;
@@ -327,8 +333,15 @@ static int __devinit coretemp_probe(struct platform_device *pdev)
if ((c->x86_model == 0xe) && (c->x86_mask < 0xc)) {
/* check for microcode update */
- rdmsr_on_cpu(data->id, MSR_IA32_UCODE_REV, &eax, &edx);
- if (edx < 0x39) {
+ err = smp_call_function_single(data->id, get_ucode_rev_on_cpu,
+ &edx, 1);
+ if (err) {
+ dev_err(&pdev->dev,
+ "Cannot determine microcode revision of "
+ "CPU#%u (%d)!\n", data->id, err);
+ err = -ENODEV;
+ goto exit_free;
+ } else if (edx < 0x39) {
err = -ENODEV;
dev_err(&pdev->dev,
"Errata AE18 not fixed, update BIOS or "
@@ -490,7 +503,7 @@ exit:
return err;
}
-static void coretemp_device_remove(unsigned int cpu)
+static void __cpuinit coretemp_device_remove(unsigned int cpu)
{
struct pdev_entry *p;
unsigned int i;
@@ -569,9 +582,8 @@ exit:
static void __exit coretemp_exit(void)
{
struct pdev_entry *p, *n;
-#ifdef CONFIG_HOTPLUG_CPU
+
unregister_hotcpu_notifier(&coretemp_cpu_notifier);
-#endif
mutex_lock(&pdev_list_mutex);
list_for_each_entry_safe(p, n, &pdev_list, list) {
platform_device_unregister(p->pdev);
diff --git a/drivers/hwmon/gpio-fan.c b/drivers/hwmon/gpio-fan.c
new file mode 100644
index 00000000000..aa701a18370
--- /dev/null
+++ b/drivers/hwmon/gpio-fan.c
@@ -0,0 +1,558 @@
+/*
+ * gpio-fan.c - Hwmon driver for fans connected to GPIO lines.
+ *
+ * Copyright (C) 2010 LaCie
+ *
+ * Author: Simon Guinot <sguinot@lacie.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/hwmon.h>
+#include <linux/gpio.h>
+#include <linux/gpio-fan.h>
+
+struct gpio_fan_data {
+ struct platform_device *pdev;
+ struct device *hwmon_dev;
+ struct mutex lock; /* lock GPIOs operations. */
+ int num_ctrl;
+ unsigned *ctrl;
+ int num_speed;
+ struct gpio_fan_speed *speed;
+ int speed_index;
+#ifdef CONFIG_PM
+ int resume_speed;
+#endif
+ bool pwm_enable;
+ struct gpio_fan_alarm *alarm;
+ struct work_struct alarm_work;
+};
+
+/*
+ * Alarm GPIO.
+ */
+
+static void fan_alarm_notify(struct work_struct *ws)
+{
+ struct gpio_fan_data *fan_data =
+ container_of(ws, struct gpio_fan_data, alarm_work);
+
+ sysfs_notify(&fan_data->pdev->dev.kobj, NULL, "fan1_alarm");
+ kobject_uevent(&fan_data->pdev->dev.kobj, KOBJ_CHANGE);
+}
+
+static irqreturn_t fan_alarm_irq_handler(int irq, void *dev_id)
+{
+ struct gpio_fan_data *fan_data = dev_id;
+
+ schedule_work(&fan_data->alarm_work);
+
+ return IRQ_NONE;
+}
+
+static ssize_t show_fan_alarm(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct gpio_fan_data *fan_data = dev_get_drvdata(dev);
+ struct gpio_fan_alarm *alarm = fan_data->alarm;
+ int value = gpio_get_value(alarm->gpio);
+
+ if (alarm->active_low)
+ value = !value;
+
+ return sprintf(buf, "%d\n", value);
+}
+
+static DEVICE_ATTR(fan1_alarm, S_IRUGO, show_fan_alarm, NULL);
+
+static int fan_alarm_init(struct gpio_fan_data *fan_data,
+ struct gpio_fan_alarm *alarm)
+{
+ int err;
+ int alarm_irq;
+ struct platform_device *pdev = fan_data->pdev;
+
+ fan_data->alarm = alarm;
+
+ err = gpio_request(alarm->gpio, "GPIO fan alarm");
+ if (err)
+ return err;
+
+ err = gpio_direction_input(alarm->gpio);
+ if (err)
+ goto err_free_gpio;
+
+ err = device_create_file(&pdev->dev, &dev_attr_fan1_alarm);
+ if (err)
+ goto err_free_gpio;
+
+ /*
+ * If the alarm GPIO don't support interrupts, just leave
+ * without initializing the fail notification support.
+ */
+ alarm_irq = gpio_to_irq(alarm->gpio);
+ if (alarm_irq < 0)
+ return 0;
+
+ INIT_WORK(&fan_data->alarm_work, fan_alarm_notify);
+ set_irq_type(alarm_irq, IRQ_TYPE_EDGE_BOTH);
+ err = request_irq(alarm_irq, fan_alarm_irq_handler, IRQF_SHARED,
+ "GPIO fan alarm", fan_data);
+ if (err)
+ goto err_free_sysfs;
+
+ return 0;
+
+err_free_sysfs:
+ device_remove_file(&pdev->dev, &dev_attr_fan1_alarm);
+err_free_gpio:
+ gpio_free(alarm->gpio);
+
+ return err;
+}
+
+static void fan_alarm_free(struct gpio_fan_data *fan_data)
+{
+ struct platform_device *pdev = fan_data->pdev;
+ int alarm_irq = gpio_to_irq(fan_data->alarm->gpio);
+
+ if (alarm_irq >= 0)
+ free_irq(alarm_irq, fan_data);
+ device_remove_file(&pdev->dev, &dev_attr_fan1_alarm);
+ gpio_free(fan_data->alarm->gpio);
+}
+
+/*
+ * Control GPIOs.
+ */
+
+/* Must be called with fan_data->lock held, except during initialization. */
+static void __set_fan_ctrl(struct gpio_fan_data *fan_data, int ctrl_val)
+{
+ int i;
+
+ for (i = 0; i < fan_data->num_ctrl; i++)
+ gpio_set_value(fan_data->ctrl[i], (ctrl_val >> i) & 1);
+}
+
+static int __get_fan_ctrl(struct gpio_fan_data *fan_data)
+{
+ int i;
+ int ctrl_val = 0;
+
+ for (i = 0; i < fan_data->num_ctrl; i++) {
+ int value;
+
+ value = gpio_get_value(fan_data->ctrl[i]);
+ ctrl_val |= (value << i);
+ }
+ return ctrl_val;
+}
+
+/* Must be called with fan_data->lock held, except during initialization. */
+static void set_fan_speed(struct gpio_fan_data *fan_data, int speed_index)
+{
+ if (fan_data->speed_index == speed_index)
+ return;
+
+ __set_fan_ctrl(fan_data, fan_data->speed[speed_index].ctrl_val);
+ fan_data->speed_index = speed_index;
+}
+
+static int get_fan_speed_index(struct gpio_fan_data *fan_data)
+{
+ int ctrl_val = __get_fan_ctrl(fan_data);
+ int i;
+
+ for (i = 0; i < fan_data->num_speed; i++)
+ if (fan_data->speed[i].ctrl_val == ctrl_val)
+ return i;
+
+ dev_warn(&fan_data->pdev->dev,
+ "missing speed array entry for GPIO value 0x%x\n", ctrl_val);
+
+ return -EINVAL;
+}
+
+static int rpm_to_speed_index(struct gpio_fan_data *fan_data, int rpm)
+{
+ struct gpio_fan_speed *speed = fan_data->speed;
+ int i;
+
+ for (i = 0; i < fan_data->num_speed; i++)
+ if (speed[i].rpm >= rpm)
+ return i;
+
+ return fan_data->num_speed - 1;
+}
+
+static ssize_t show_pwm(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct gpio_fan_data *fan_data = dev_get_drvdata(dev);
+ u8 pwm = fan_data->speed_index * 255 / (fan_data->num_speed - 1);
+
+ return sprintf(buf, "%d\n", pwm);
+}
+
+static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct gpio_fan_data *fan_data = dev_get_drvdata(dev);
+ unsigned long pwm;
+ int speed_index;
+ int ret = count;
+
+ if (strict_strtoul(buf, 10, &pwm) || pwm > 255)
+ return -EINVAL;
+
+ mutex_lock(&fan_data->lock);
+
+ if (!fan_data->pwm_enable) {
+ ret = -EPERM;
+ goto exit_unlock;
+ }
+
+ speed_index = DIV_ROUND_UP(pwm * (fan_data->num_speed - 1), 255);
+ set_fan_speed(fan_data, speed_index);
+
+exit_unlock:
+ mutex_unlock(&fan_data->lock);
+
+ return ret;
+}
+
+static ssize_t show_pwm_enable(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct gpio_fan_data *fan_data = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", fan_data->pwm_enable);
+}
+
+static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct gpio_fan_data *fan_data = dev_get_drvdata(dev);
+ unsigned long val;
+
+ if (strict_strtoul(buf, 10, &val) || val > 1)
+ return -EINVAL;
+
+ if (fan_data->pwm_enable == val)
+ return count;
+
+ mutex_lock(&fan_data->lock);
+
+ fan_data->pwm_enable = val;
+
+ /* Disable manual control mode: set fan at full speed. */
+ if (val == 0)
+ set_fan_speed(fan_data, fan_data->num_speed - 1);
+
+ mutex_unlock(&fan_data->lock);
+
+ return count;
+}
+
+static ssize_t show_pwm_mode(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "0\n");
+}
+
+static ssize_t show_rpm_min(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct gpio_fan_data *fan_data = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", fan_data->speed[0].rpm);
+}
+
+static ssize_t show_rpm_max(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct gpio_fan_data *fan_data = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n",
+ fan_data->speed[fan_data->num_speed - 1].rpm);
+}
+
+static ssize_t show_rpm(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct gpio_fan_data *fan_data = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", fan_data->speed[fan_data->speed_index].rpm);
+}
+
+static ssize_t set_rpm(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct gpio_fan_data *fan_data = dev_get_drvdata(dev);
+ unsigned long rpm;
+ int ret = count;
+
+ if (strict_strtoul(buf, 10, &rpm))
+ return -EINVAL;
+
+ mutex_lock(&fan_data->lock);
+
+ if (!fan_data->pwm_enable) {
+ ret = -EPERM;
+ goto exit_unlock;
+ }
+
+ set_fan_speed(fan_data, rpm_to_speed_index(fan_data, rpm));
+
+exit_unlock:
+ mutex_unlock(&fan_data->lock);
+
+ return ret;
+}
+
+static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm);
+static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
+ show_pwm_enable, set_pwm_enable);
+static DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL);
+static DEVICE_ATTR(fan1_min, S_IRUGO, show_rpm_min, NULL);
+static DEVICE_ATTR(fan1_max, S_IRUGO, show_rpm_max, NULL);
+static DEVICE_ATTR(fan1_input, S_IRUGO, show_rpm, NULL);
+static DEVICE_ATTR(fan1_target, S_IRUGO | S_IWUSR, show_rpm, set_rpm);
+
+static struct attribute *gpio_fan_ctrl_attributes[] = {
+ &dev_attr_pwm1.attr,
+ &dev_attr_pwm1_enable.attr,
+ &dev_attr_pwm1_mode.attr,
+ &dev_attr_fan1_input.attr,
+ &dev_attr_fan1_target.attr,
+ &dev_attr_fan1_min.attr,
+ &dev_attr_fan1_max.attr,
+ NULL
+};
+
+static const struct attribute_group gpio_fan_ctrl_group = {
+ .attrs = gpio_fan_ctrl_attributes,
+};
+
+static int fan_ctrl_init(struct gpio_fan_data *fan_data,
+ struct gpio_fan_platform_data *pdata)
+{
+ struct platform_device *pdev = fan_data->pdev;
+ int num_ctrl = pdata->num_ctrl;
+ unsigned *ctrl = pdata->ctrl;
+ int i, err;
+
+ for (i = 0; i < num_ctrl; i++) {
+ err = gpio_request(ctrl[i], "GPIO fan control");
+ if (err)
+ goto err_free_gpio;
+
+ err = gpio_direction_output(ctrl[i], gpio_get_value(ctrl[i]));
+ if (err) {
+ gpio_free(ctrl[i]);
+ goto err_free_gpio;
+ }
+ }
+
+ err = sysfs_create_group(&pdev->dev.kobj, &gpio_fan_ctrl_group);
+ if (err)
+ goto err_free_gpio;
+
+ fan_data->num_ctrl = num_ctrl;
+ fan_data->ctrl = ctrl;
+ fan_data->num_speed = pdata->num_speed;
+ fan_data->speed = pdata->speed;
+ fan_data->pwm_enable = true; /* Enable manual fan speed control. */
+ fan_data->speed_index = get_fan_speed_index(fan_data);
+ if (fan_data->speed_index < 0) {
+ err = -ENODEV;
+ goto err_free_gpio;
+ }
+
+ return 0;
+
+err_free_gpio:
+ for (i = i - 1; i >= 0; i--)
+ gpio_free(ctrl[i]);
+
+ return err;
+}
+
+static void fan_ctrl_free(struct gpio_fan_data *fan_data)
+{
+ struct platform_device *pdev = fan_data->pdev;
+ int i;
+
+ sysfs_remove_group(&pdev->dev.kobj, &gpio_fan_ctrl_group);
+ for (i = 0; i < fan_data->num_ctrl; i++)
+ gpio_free(fan_data->ctrl[i]);
+}
+
+/*
+ * Platform driver.
+ */
+
+static ssize_t show_name(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "gpio-fan\n");
+}
+
+static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
+
+static int __devinit gpio_fan_probe(struct platform_device *pdev)
+{
+ int err;
+ struct gpio_fan_data *fan_data;
+ struct gpio_fan_platform_data *pdata = pdev->dev.platform_data;
+
+ if (!pdata)
+ return -EINVAL;
+
+ fan_data = kzalloc(sizeof(struct gpio_fan_data), GFP_KERNEL);
+ if (!fan_data)
+ return -ENOMEM;
+
+ fan_data->pdev = pdev;
+ platform_set_drvdata(pdev, fan_data);
+ mutex_init(&fan_data->lock);
+
+ /* Configure alarm GPIO if available. */
+ if (pdata->alarm) {
+ err = fan_alarm_init(fan_data, pdata->alarm);
+ if (err)
+ goto err_free_data;
+ }
+
+ /* Configure control GPIOs if available. */
+ if (pdata->ctrl && pdata->num_ctrl > 0) {
+ if (!pdata->speed || pdata->num_speed <= 1) {
+ err = -EINVAL;
+ goto err_free_alarm;
+ }
+ err = fan_ctrl_init(fan_data, pdata);
+ if (err)
+ goto err_free_alarm;
+ }
+
+ err = device_create_file(&pdev->dev, &dev_attr_name);
+ if (err)
+ goto err_free_ctrl;
+
+ /* Make this driver part of hwmon class. */
+ fan_data->hwmon_dev = hwmon_device_register(&pdev->dev);
+ if (IS_ERR(fan_data->hwmon_dev)) {
+ err = PTR_ERR(fan_data->hwmon_dev);
+ goto err_remove_name;
+ }
+
+ dev_info(&pdev->dev, "GPIO fan initialized\n");
+
+ return 0;
+
+err_remove_name:
+ device_remove_file(&pdev->dev, &dev_attr_name);
+err_free_ctrl:
+ if (fan_data->ctrl)
+ fan_ctrl_free(fan_data);
+err_free_alarm:
+ if (fan_data->alarm)
+ fan_alarm_free(fan_data);
+err_free_data:
+ platform_set_drvdata(pdev, NULL);
+ kfree(fan_data);
+
+ return err;
+}
+
+static int __devexit gpio_fan_remove(struct platform_device *pdev)
+{
+ struct gpio_fan_data *fan_data = platform_get_drvdata(pdev);
+
+ hwmon_device_unregister(fan_data->hwmon_dev);
+ device_remove_file(&pdev->dev, &dev_attr_name);
+ if (fan_data->alarm)
+ fan_alarm_free(fan_data);
+ if (fan_data->ctrl)
+ fan_ctrl_free(fan_data);
+ kfree(fan_data);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int gpio_fan_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct gpio_fan_data *fan_data = platform_get_drvdata(pdev);
+
+ if (fan_data->ctrl) {
+ fan_data->resume_speed = fan_data->speed_index;
+ set_fan_speed(fan_data, 0);
+ }
+
+ return 0;
+}
+
+static int gpio_fan_resume(struct platform_device *pdev)
+{
+ struct gpio_fan_data *fan_data = platform_get_drvdata(pdev);
+
+ if (fan_data->ctrl)
+ set_fan_speed(fan_data, fan_data->resume_speed);
+
+ return 0;
+}
+#else
+#define gpio_fan_suspend NULL
+#define gpio_fan_resume NULL
+#endif
+
+static struct platform_driver gpio_fan_driver = {
+ .probe = gpio_fan_probe,
+ .remove = __devexit_p(gpio_fan_remove),
+ .suspend = gpio_fan_suspend,
+ .resume = gpio_fan_resume,
+ .driver = {
+ .name = "gpio-fan",
+ },
+};
+
+static int __init gpio_fan_init(void)
+{
+ return platform_driver_register(&gpio_fan_driver);
+}
+
+static void __exit gpio_fan_exit(void)
+{
+ platform_driver_unregister(&gpio_fan_driver);
+}
+
+module_init(gpio_fan_init);
+module_exit(gpio_fan_exit);
+
+MODULE_AUTHOR("Simon Guinot <sguinot@lacie.com>");
+MODULE_DESCRIPTION("GPIO FAN driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:gpio-fan");
diff --git a/drivers/hwmon/hp_accel.c b/drivers/hwmon/hp_accel.c
index 36e95753223..a56a78412fc 100644
--- a/drivers/hwmon/hp_accel.c
+++ b/drivers/hwmon/hp_accel.c
@@ -146,7 +146,7 @@ int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
{
- lis3_dev.ac = *((struct axis_conversion *)dmi->driver_data);
+ lis3_dev.ac = *((union axis_conversion *)dmi->driver_data);
printk(KERN_INFO DRIVER_NAME ": hardware type %s found.\n", dmi->ident);
return 1;
@@ -154,16 +154,19 @@ static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
/* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
* If the value is negative, the opposite of the hw value is used. */
-static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3};
-static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3};
-static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3};
-static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3};
-static struct axis_conversion lis3lv02d_axis_xy_swap = {2, 1, 3};
-static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3};
-static struct axis_conversion lis3lv02d_axis_xy_rotated_left_usd = {-2, 1, -3};
-static struct axis_conversion lis3lv02d_axis_xy_swap_inverted = {-2, -1, 3};
-static struct axis_conversion lis3lv02d_axis_xy_rotated_right = {2, -1, 3};
-static struct axis_conversion lis3lv02d_axis_xy_swap_yz_inverted = {2, -1, -3};
+#define DEFINE_CONV(name, x, y, z) \
+ static union axis_conversion lis3lv02d_axis_##name = \
+ { .as_array = { x, y, z } }
+DEFINE_CONV(normal, 1, 2, 3);
+DEFINE_CONV(y_inverted, 1, -2, 3);
+DEFINE_CONV(x_inverted, -1, 2, 3);
+DEFINE_CONV(z_inverted, 1, 2, -3);
+DEFINE_CONV(xy_swap, 2, 1, 3);
+DEFINE_CONV(xy_rotated_left, -2, 1, 3);
+DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3);
+DEFINE_CONV(xy_swap_inverted, -2, -1, 3);
+DEFINE_CONV(xy_rotated_right, 2, -1, 3);
+DEFINE_CONV(xy_swap_yz_inverted, 2, -1, -3);
#define AXIS_DMI_MATCH(_ident, _name, _axis) { \
.ident = _ident, \
@@ -222,7 +225,7 @@ static struct dmi_system_id lis3lv02d_dmi_ids[] = {
AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),
AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted),
- AXIS_DMI_MATCH("Mini5102", "HP Mini 5102", xy_rotated_left_usd),
+ AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd),
{ NULL, }
/* Laptop models without axis info (yet):
* "NC6910" "HP Compaq 6910"
@@ -299,7 +302,10 @@ static int lis3lv02d_add(struct acpi_device *device)
lis3lv02d_enum_resources(device);
/* If possible use a "standard" axes order */
- if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
+ if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) {
+ printk(KERN_INFO DRIVER_NAME ": Using custom axes %d,%d,%d\n",
+ lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z);
+ } else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
printk(KERN_INFO DRIVER_NAME ": laptop model unknown, "
"using default axes configuration\n");
lis3_dev.ac = lis3lv02d_axis_normal;
diff --git a/drivers/hwmon/lis3lv02d.c b/drivers/hwmon/lis3lv02d.c
index fc591ae5310..0cee73a6124 100644
--- a/drivers/hwmon/lis3lv02d.c
+++ b/drivers/hwmon/lis3lv02d.c
@@ -31,9 +31,11 @@
#include <linux/delay.h>
#include <linux/wait.h>
#include <linux/poll.h>
+#include <linux/slab.h>
#include <linux/freezer.h>
#include <linux/uaccess.h>
#include <linux/miscdevice.h>
+#include <linux/pm_runtime.h>
#include <asm/atomic.h>
#include "lis3lv02d.h"
@@ -43,6 +45,16 @@
#define MDPS_POLL_INTERVAL 50
#define MDPS_POLL_MIN 0
#define MDPS_POLL_MAX 2000
+
+#define LIS3_SYSFS_POWERDOWN_DELAY 5000 /* In milliseconds */
+
+#define SELFTEST_OK 0
+#define SELFTEST_FAIL -1
+#define SELFTEST_IRQ -2
+
+#define IRQ_LINE0 0
+#define IRQ_LINE1 1
+
/*
* The sensor can also generate interrupts (DRDY) but it's pretty pointless
* because they are generated even if the data do not change. So it's better
@@ -66,8 +78,10 @@
#define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024)
#define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY)
-#define LIS3_DEFAULT_FUZZ 3
-#define LIS3_DEFAULT_FLAT 3
+#define LIS3_DEFAULT_FUZZ_12B 3
+#define LIS3_DEFAULT_FLAT_12B 3
+#define LIS3_DEFAULT_FUZZ_8B 1
+#define LIS3_DEFAULT_FLAT_8B 1
struct lis3lv02d lis3_dev = {
.misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait),
@@ -75,6 +89,30 @@ struct lis3lv02d lis3_dev = {
EXPORT_SYMBOL_GPL(lis3_dev);
+/* just like param_set_int() but does sanity-check so that it won't point
+ * over the axis array size
+ */
+static int param_set_axis(const char *val, const struct kernel_param *kp)
+{
+ int ret = param_set_int(val, kp);
+ if (!ret) {
+ int val = *(int *)kp->arg;
+ if (val < 0)
+ val = -val;
+ if (!val || val > 3)
+ return -EINVAL;
+ }
+ return ret;
+}
+
+static struct kernel_param_ops param_ops_axis = {
+ .set = param_set_axis,
+ .get = param_get_int,
+};
+
+module_param_array_named(axes, lis3_dev.ac.as_array, axis, NULL, 0644);
+MODULE_PARM_DESC(axes, "Axis-mapping for x,y,z directions");
+
static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg)
{
s8 lo;
@@ -123,9 +161,24 @@ static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z)
int position[3];
int i;
- position[0] = lis3->read_data(lis3, OUTX);
- position[1] = lis3->read_data(lis3, OUTY);
- position[2] = lis3->read_data(lis3, OUTZ);
+ if (lis3->blkread) {
+ if (lis3_dev.whoami == WAI_12B) {
+ u16 data[3];
+ lis3->blkread(lis3, OUTX_L, 6, (u8 *)data);
+ for (i = 0; i < 3; i++)
+ position[i] = (s16)le16_to_cpu(data[i]);
+ } else {
+ u8 data[5];
+ /* Data: x, dummy, y, dummy, z */
+ lis3->blkread(lis3, OUTX, 5, data);
+ for (i = 0; i < 3; i++)
+ position[i] = (s8)data[i * 2];
+ }
+ } else {
+ position[0] = lis3->read_data(lis3, OUTX);
+ position[1] = lis3->read_data(lis3, OUTY);
+ position[2] = lis3->read_data(lis3, OUTZ);
+ }
for (i = 0; i < 3; i++)
position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY;
@@ -138,6 +191,7 @@ static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z)
/* conversion btw sampling rate and the register values */
static int lis3_12_rates[4] = {40, 160, 640, 2560};
static int lis3_8_rates[2] = {100, 400};
+static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
/* ODR is Output Data Rate */
static int lis3lv02d_get_odr(void)
@@ -156,6 +210,9 @@ static int lis3lv02d_set_odr(int rate)
u8 ctrl;
int i, len, shift;
+ if (!rate)
+ return -EINVAL;
+
lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
ctrl &= ~lis3_dev.odr_mask;
len = 1 << hweight_long(lis3_dev.odr_mask); /* # of possible values */
@@ -172,19 +229,42 @@ static int lis3lv02d_set_odr(int rate)
static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3])
{
- u8 reg;
+ u8 ctlreg, reg;
s16 x, y, z;
u8 selftest;
int ret;
+ u8 ctrl_reg_data;
+ unsigned char irq_cfg;
mutex_lock(&lis3->mutex);
- if (lis3_dev.whoami == WAI_12B)
- selftest = CTRL1_ST;
- else
- selftest = CTRL1_STP;
- lis3->read(lis3, CTRL_REG1, &reg);
- lis3->write(lis3, CTRL_REG1, (reg | selftest));
+ irq_cfg = lis3->irq_cfg;
+ if (lis3_dev.whoami == WAI_8B) {
+ lis3->data_ready_count[IRQ_LINE0] = 0;
+ lis3->data_ready_count[IRQ_LINE1] = 0;
+
+ /* Change interrupt cfg to data ready for selftest */
+ atomic_inc(&lis3_dev.wake_thread);
+ lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY;
+ lis3->read(lis3, CTRL_REG3, &ctrl_reg_data);
+ lis3->write(lis3, CTRL_REG3, (ctrl_reg_data &
+ ~(LIS3_IRQ1_MASK | LIS3_IRQ2_MASK)) |
+ (LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY));
+ }
+
+ if (lis3_dev.whoami == WAI_3DC) {
+ ctlreg = CTRL_REG4;
+ selftest = CTRL4_ST0;
+ } else {
+ ctlreg = CTRL_REG1;
+ if (lis3_dev.whoami == WAI_12B)
+ selftest = CTRL1_ST;
+ else
+ selftest = CTRL1_STP;
+ }
+
+ lis3->read(lis3, ctlreg, &reg);
+ lis3->write(lis3, ctlreg, (reg | selftest));
msleep(lis3->pwron_delay / lis3lv02d_get_odr());
/* Read directly to avoid axis remap */
@@ -193,7 +273,7 @@ static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3])
z = lis3->read_data(lis3, OUTZ);
/* back to normal settings */
- lis3->write(lis3, CTRL_REG1, reg);
+ lis3->write(lis3, ctlreg, reg);
msleep(lis3->pwron_delay / lis3lv02d_get_odr());
results[0] = x - lis3->read_data(lis3, OUTX);
@@ -201,13 +281,33 @@ static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3])
results[2] = z - lis3->read_data(lis3, OUTZ);
ret = 0;
+
+ if (lis3_dev.whoami == WAI_8B) {
+ /* Restore original interrupt configuration */
+ atomic_dec(&lis3_dev.wake_thread);
+ lis3->write(lis3, CTRL_REG3, ctrl_reg_data);
+ lis3->irq_cfg = irq_cfg;
+
+ if ((irq_cfg & LIS3_IRQ1_MASK) &&
+ lis3->data_ready_count[IRQ_LINE0] < 2) {
+ ret = SELFTEST_IRQ;
+ goto fail;
+ }
+
+ if ((irq_cfg & LIS3_IRQ2_MASK) &&
+ lis3->data_ready_count[IRQ_LINE1] < 2) {
+ ret = SELFTEST_IRQ;
+ goto fail;
+ }
+ }
+
if (lis3->pdata) {
int i;
for (i = 0; i < 3; i++) {
/* Check against selftest acceptance limits */
if ((results[i] < lis3->pdata->st_min_limits[i]) ||
(results[i] > lis3->pdata->st_max_limits[i])) {
- ret = -EIO;
+ ret = SELFTEST_FAIL;
goto fail;
}
}
@@ -219,10 +319,46 @@ fail:
return ret;
}
+/*
+ * Order of registers in the list affects to order of the restore process.
+ * Perhaps it is a good idea to set interrupt enable register as a last one
+ * after all other configurations
+ */
+static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1,
+ FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2,
+ CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ,
+ CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW,
+ CTRL_REG1, CTRL_REG2, CTRL_REG3};
+
+static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H,
+ FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H,
+ DD_THSE_L, DD_THSE_H,
+ CTRL_REG1, CTRL_REG3, CTRL_REG2};
+
+static inline void lis3_context_save(struct lis3lv02d *lis3)
+{
+ int i;
+ for (i = 0; i < lis3->regs_size; i++)
+ lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]);
+ lis3->regs_stored = true;
+}
+
+static inline void lis3_context_restore(struct lis3lv02d *lis3)
+{
+ int i;
+ if (lis3->regs_stored)
+ for (i = 0; i < lis3->regs_size; i++)
+ lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]);
+}
+
void lis3lv02d_poweroff(struct lis3lv02d *lis3)
{
+ if (lis3->reg_ctrl)
+ lis3_context_save(lis3);
/* disable X,Y,Z axis and power down */
lis3->write(lis3, CTRL_REG1, 0x00);
+ if (lis3->reg_ctrl)
+ lis3->reg_ctrl(lis3, LIS3_REG_OFF);
}
EXPORT_SYMBOL_GPL(lis3lv02d_poweroff);
@@ -232,19 +368,24 @@ void lis3lv02d_poweron(struct lis3lv02d *lis3)
lis3->init(lis3);
- /* LIS3 power on delay is quite long */
- msleep(lis3->pwron_delay / lis3lv02d_get_odr());
-
/*
* Common configuration
* BDU: (12 bits sensors only) LSB and MSB values are not updated until
* both have been read. So the value read will always be correct.
+ * Set BOOT bit to refresh factory tuning values.
*/
- if (lis3->whoami == WAI_12B) {
- lis3->read(lis3, CTRL_REG2, &reg);
- reg |= CTRL2_BDU;
- lis3->write(lis3, CTRL_REG2, reg);
- }
+ lis3->read(lis3, CTRL_REG2, &reg);
+ if (lis3->whoami == WAI_12B)
+ reg |= CTRL2_BDU | CTRL2_BOOT;
+ else
+ reg |= CTRL2_BOOT_8B;
+ lis3->write(lis3, CTRL_REG2, reg);
+
+ /* LIS3 power on delay is quite long */
+ msleep(lis3->pwron_delay / lis3lv02d_get_odr());
+
+ if (lis3->reg_ctrl)
+ lis3_context_restore(lis3);
}
EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
@@ -262,6 +403,27 @@ static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev)
mutex_unlock(&lis3_dev.mutex);
}
+static void lis3lv02d_joystick_open(struct input_polled_dev *pidev)
+{
+ if (lis3_dev.pm_dev)
+ pm_runtime_get_sync(lis3_dev.pm_dev);
+
+ if (lis3_dev.pdata && lis3_dev.whoami == WAI_8B && lis3_dev.idev)
+ atomic_set(&lis3_dev.wake_thread, 1);
+ /*
+ * Update coordinates for the case where poll interval is 0 and
+ * the chip in running purely under interrupt control
+ */
+ lis3lv02d_joystick_poll(pidev);
+}
+
+static void lis3lv02d_joystick_close(struct input_polled_dev *pidev)
+{
+ atomic_set(&lis3_dev.wake_thread, 0);
+ if (lis3_dev.pm_dev)
+ pm_runtime_put(lis3_dev.pm_dev);
+}
+
static irqreturn_t lis302dl_interrupt(int irq, void *dummy)
{
if (!test_bit(0, &lis3_dev.misc_opened))
@@ -277,8 +439,7 @@ static irqreturn_t lis302dl_interrupt(int irq, void *dummy)
wake_up_interruptible(&lis3_dev.misc_wait);
kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN);
out:
- if (lis3_dev.pdata && lis3_dev.whoami == WAI_8B && lis3_dev.idev &&
- lis3_dev.idev->input->users)
+ if (atomic_read(&lis3_dev.wake_thread))
return IRQ_WAKE_THREAD;
return IRQ_HANDLED;
}
@@ -309,44 +470,41 @@ static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3)
mutex_unlock(&lis3->mutex);
}
-static void lis302dl_interrupt_handle_ff_wu(struct lis3lv02d *lis3)
+static inline void lis302dl_data_ready(struct lis3lv02d *lis3, int index)
{
- u8 wu1_src;
- u8 wu2_src;
-
- lis3->read(lis3, FF_WU_SRC_1, &wu1_src);
- lis3->read(lis3, FF_WU_SRC_2, &wu2_src);
+ int dummy;
- wu1_src = wu1_src & FF_WU_SRC_IA ? wu1_src : 0;
- wu2_src = wu2_src & FF_WU_SRC_IA ? wu2_src : 0;
-
- /* joystick poll is internally protected by the lis3->mutex. */
- if (wu1_src || wu2_src)
- lis3lv02d_joystick_poll(lis3_dev.idev);
+ /* Dummy read to ack interrupt */
+ lis3lv02d_get_xyz(lis3, &dummy, &dummy, &dummy);
+ lis3->data_ready_count[index]++;
}
static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data)
{
-
struct lis3lv02d *lis3 = data;
+ u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ1_MASK;
- if ((lis3->pdata->irq_cfg & LIS3_IRQ1_MASK) == LIS3_IRQ1_CLICK)
+ if (irq_cfg == LIS3_IRQ1_CLICK)
lis302dl_interrupt_handle_click(lis3);
+ else if (unlikely(irq_cfg == LIS3_IRQ1_DATA_READY))
+ lis302dl_data_ready(lis3, IRQ_LINE0);
else
- lis302dl_interrupt_handle_ff_wu(lis3);
+ lis3lv02d_joystick_poll(lis3->idev);
return IRQ_HANDLED;
}
static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data)
{
-
struct lis3lv02d *lis3 = data;
+ u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ2_MASK;
- if ((lis3->pdata->irq_cfg & LIS3_IRQ2_MASK) == LIS3_IRQ2_CLICK)
+ if (irq_cfg == LIS3_IRQ2_CLICK)
lis302dl_interrupt_handle_click(lis3);
+ else if (unlikely(irq_cfg == LIS3_IRQ2_DATA_READY))
+ lis302dl_data_ready(lis3, IRQ_LINE1);
else
- lis302dl_interrupt_handle_ff_wu(lis3);
+ lis3lv02d_joystick_poll(lis3->idev);
return IRQ_HANDLED;
}
@@ -356,6 +514,9 @@ static int lis3lv02d_misc_open(struct inode *inode, struct file *file)
if (test_and_set_bit(0, &lis3_dev.misc_opened))
return -EBUSY; /* already open */
+ if (lis3_dev.pm_dev)
+ pm_runtime_get_sync(lis3_dev.pm_dev);
+
atomic_set(&lis3_dev.count, 0);
return 0;
}
@@ -364,6 +525,8 @@ static int lis3lv02d_misc_release(struct inode *inode, struct file *file)
{
fasync_helper(-1, file, 0, &lis3_dev.async_queue);
clear_bit(0, &lis3_dev.misc_opened); /* release the device */
+ if (lis3_dev.pm_dev)
+ pm_runtime_put(lis3_dev.pm_dev);
return 0;
}
@@ -460,6 +623,8 @@ int lis3lv02d_joystick_enable(void)
return -ENOMEM;
lis3_dev.idev->poll = lis3lv02d_joystick_poll;
+ lis3_dev.idev->open = lis3lv02d_joystick_open;
+ lis3_dev.idev->close = lis3lv02d_joystick_close;
lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL;
lis3_dev.idev->poll_interval_min = MDPS_POLL_MIN;
lis3_dev.idev->poll_interval_max = MDPS_POLL_MAX;
@@ -473,8 +638,16 @@ int lis3lv02d_joystick_enable(void)
set_bit(EV_ABS, input_dev->evbit);
max_val = (lis3_dev.mdps_max_val * lis3_dev.scale) / LIS3_ACCURACY;
- fuzz = (LIS3_DEFAULT_FUZZ * lis3_dev.scale) / LIS3_ACCURACY;
- flat = (LIS3_DEFAULT_FLAT * lis3_dev.scale) / LIS3_ACCURACY;
+ if (lis3_dev.whoami == WAI_12B) {
+ fuzz = LIS3_DEFAULT_FUZZ_12B;
+ flat = LIS3_DEFAULT_FLAT_12B;
+ } else {
+ fuzz = LIS3_DEFAULT_FUZZ_8B;
+ flat = LIS3_DEFAULT_FLAT_8B;
+ }
+ fuzz = (fuzz * lis3_dev.scale) / LIS3_ACCURACY;
+ flat = (flat * lis3_dev.scale) / LIS3_ACCURACY;
+
input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat);
input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat);
input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat);
@@ -512,14 +685,47 @@ void lis3lv02d_joystick_disable(void)
EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable);
/* Sysfs stuff */
+static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3)
+{
+ /*
+ * SYSFS functions are fast visitors so put-call
+ * immediately after the get-call. However, keep
+ * chip running for a while and schedule delayed
+ * suspend. This way periodic sysfs calls doesn't
+ * suffer from relatively long power up time.
+ */
+
+ if (lis3->pm_dev) {
+ pm_runtime_get_sync(lis3->pm_dev);
+ pm_runtime_put_noidle(lis3->pm_dev);
+ pm_schedule_suspend(lis3->pm_dev, LIS3_SYSFS_POWERDOWN_DELAY);
+ }
+}
+
static ssize_t lis3lv02d_selftest_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- int result;
s16 values[3];
- result = lis3lv02d_selftest(&lis3_dev, values);
- return sprintf(buf, "%s %d %d %d\n", result == 0 ? "OK" : "FAIL",
+ static const char ok[] = "OK";
+ static const char fail[] = "FAIL";
+ static const char irq[] = "FAIL_IRQ";
+ const char *res;
+
+ lis3lv02d_sysfs_poweron(&lis3_dev);
+ switch (lis3lv02d_selftest(&lis3_dev, values)) {
+ case SELFTEST_FAIL:
+ res = fail;
+ break;
+ case SELFTEST_IRQ:
+ res = irq;
+ break;
+ case SELFTEST_OK:
+ default:
+ res = ok;
+ break;
+ }
+ return sprintf(buf, "%s %d %d %d\n", res,
values[0], values[1], values[2]);
}
@@ -528,6 +734,7 @@ static ssize_t lis3lv02d_position_show(struct device *dev,
{
int x, y, z;
+ lis3lv02d_sysfs_poweron(&lis3_dev);
mutex_lock(&lis3_dev.mutex);
lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
mutex_unlock(&lis3_dev.mutex);
@@ -537,6 +744,7 @@ static ssize_t lis3lv02d_position_show(struct device *dev,
static ssize_t lis3lv02d_rate_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
+ lis3lv02d_sysfs_poweron(&lis3_dev);
return sprintf(buf, "%d\n", lis3lv02d_get_odr());
}
@@ -549,6 +757,7 @@ static ssize_t lis3lv02d_rate_set(struct device *dev,
if (strict_strtoul(buf, 0, &rate))
return -EINVAL;
+ lis3lv02d_sysfs_poweron(&lis3_dev);
if (lis3lv02d_set_odr(rate))
return -EINVAL;
@@ -585,6 +794,18 @@ int lis3lv02d_remove_fs(struct lis3lv02d *lis3)
{
sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
platform_device_unregister(lis3->pdev);
+ if (lis3->pm_dev) {
+ /* Barrier after the sysfs remove */
+ pm_runtime_barrier(lis3->pm_dev);
+
+ /* SYSFS may have left chip running. Turn off if necessary */
+ if (!pm_runtime_suspended(lis3->pm_dev))
+ lis3lv02d_poweroff(&lis3_dev);
+
+ pm_runtime_disable(lis3->pm_dev);
+ pm_runtime_set_suspended(lis3->pm_dev);
+ }
+ kfree(lis3->reg_cache);
return 0;
}
EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs);
@@ -616,16 +837,16 @@ static void lis3lv02d_8b_configure(struct lis3lv02d *dev,
if (p->wakeup_flags) {
dev->write(dev, FF_WU_CFG_1, p->wakeup_flags);
dev->write(dev, FF_WU_THS_1, p->wakeup_thresh & 0x7f);
- /* default to 2.5ms for now */
- dev->write(dev, FF_WU_DURATION_1, 1);
+ /* pdata value + 1 to keep this backward compatible*/
+ dev->write(dev, FF_WU_DURATION_1, p->duration1 + 1);
ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/
}
if (p->wakeup_flags2) {
dev->write(dev, FF_WU_CFG_2, p->wakeup_flags2);
dev->write(dev, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f);
- /* default to 2.5ms for now */
- dev->write(dev, FF_WU_DURATION_2, 1);
+ /* pdata value + 1 to keep this backward compatible*/
+ dev->write(dev, FF_WU_DURATION_2, p->duration2 + 1);
ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/
}
/* Configure hipass filters */
@@ -635,8 +856,8 @@ static void lis3lv02d_8b_configure(struct lis3lv02d *dev,
err = request_threaded_irq(p->irq2,
NULL,
lis302dl_interrupt_thread2_8b,
- IRQF_TRIGGER_RISING |
- IRQF_ONESHOT,
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT |
+ (p->irq_flags2 & IRQF_TRIGGER_MASK),
DRIVER_NAME, &lis3_dev);
if (err < 0)
printk(KERN_ERR DRIVER_NAME
@@ -652,6 +873,7 @@ int lis3lv02d_init_device(struct lis3lv02d *dev)
{
int err;
irq_handler_t thread_fn;
+ int irq_flags = 0;
dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I);
@@ -664,6 +886,8 @@ int lis3lv02d_init_device(struct lis3lv02d *dev)
dev->odrs = lis3_12_rates;
dev->odr_mask = CTRL1_DF0 | CTRL1_DF1;
dev->scale = LIS3_SENSITIVITY_12B;
+ dev->regs = lis3_wai12_regs;
+ dev->regs_size = ARRAY_SIZE(lis3_wai12_regs);
break;
case WAI_8B:
printk(KERN_INFO DRIVER_NAME ": 8 bits sensor found\n");
@@ -673,6 +897,17 @@ int lis3lv02d_init_device(struct lis3lv02d *dev)
dev->odrs = lis3_8_rates;
dev->odr_mask = CTRL1_DR;
dev->scale = LIS3_SENSITIVITY_8B;
+ dev->regs = lis3_wai8_regs;
+ dev->regs_size = ARRAY_SIZE(lis3_wai8_regs);
+ break;
+ case WAI_3DC:
+ printk(KERN_INFO DRIVER_NAME ": 8 bits 3DC sensor found\n");
+ dev->read_data = lis3lv02d_read_8;
+ dev->mdps_max_val = 128;
+ dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
+ dev->odrs = lis3_3dc_rates;
+ dev->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3;
+ dev->scale = LIS3_SENSITIVITY_8B;
break;
default:
printk(KERN_ERR DRIVER_NAME
@@ -680,11 +915,25 @@ int lis3lv02d_init_device(struct lis3lv02d *dev)
return -EINVAL;
}
+ dev->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs),
+ sizeof(lis3_wai12_regs)), GFP_KERNEL);
+
+ if (dev->reg_cache == NULL) {
+ printk(KERN_ERR DRIVER_NAME "out of memory\n");
+ return -ENOMEM;
+ }
+
mutex_init(&dev->mutex);
+ atomic_set(&dev->wake_thread, 0);
lis3lv02d_add_fs(dev);
lis3lv02d_poweron(dev);
+ if (dev->pm_dev) {
+ pm_runtime_set_active(dev->pm_dev);
+ pm_runtime_enable(dev->pm_dev);
+ }
+
if (lis3lv02d_joystick_enable())
printk(KERN_ERR DRIVER_NAME ": joystick initialization failed\n");
@@ -696,8 +945,14 @@ int lis3lv02d_init_device(struct lis3lv02d *dev)
if (dev->whoami == WAI_8B)
lis3lv02d_8b_configure(dev, p);
+ irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK;
+
+ dev->irq_cfg = p->irq_cfg;
if (p->irq_cfg)
dev->write(dev, CTRL_REG3, p->irq_cfg);
+
+ if (p->default_rate)
+ lis3lv02d_set_odr(p->default_rate);
}
/* bail if we did not get an IRQ from the bus layer */
@@ -725,7 +980,8 @@ int lis3lv02d_init_device(struct lis3lv02d *dev)
err = request_threaded_irq(dev->irq, lis302dl_interrupt,
thread_fn,
- IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT |
+ irq_flags,
DRIVER_NAME, &lis3_dev);
if (err < 0) {
diff --git a/drivers/hwmon/lis3lv02d.h b/drivers/hwmon/lis3lv02d.h
index 854091380e3..a1939589eb2 100644
--- a/drivers/hwmon/lis3lv02d.h
+++ b/drivers/hwmon/lis3lv02d.h
@@ -20,6 +20,7 @@
*/
#include <linux/platform_device.h>
#include <linux/input-polldev.h>
+#include <linux/regulator/consumer.h>
/*
* This driver tries to support the "digital" accelerometer chips from
@@ -45,6 +46,7 @@ enum lis3_reg {
CTRL_REG1 = 0x20,
CTRL_REG2 = 0x21,
CTRL_REG3 = 0x22,
+ CTRL_REG4 = 0x23,
HP_FILTER_RESET = 0x23,
STATUS_REG = 0x27,
OUTX_L = 0x28,
@@ -93,6 +95,7 @@ enum lis3lv02d_reg {
};
enum lis3_who_am_i {
+ WAI_3DC = 0x33, /* 8 bits: LIS3DC, HP3DC */
WAI_12B = 0x3A, /* 12 bits: LIS3LV02D[LQ]... */
WAI_8B = 0x3B, /* 8 bits: LIS[23]02D[LQ]... */
WAI_6B = 0x52, /* 6 bits: LIS331DLF - not supported */
@@ -118,6 +121,13 @@ enum lis3lv02d_ctrl1_8b {
CTRL1_DR = 0x80,
};
+enum lis3lv02d_ctrl1_3dc {
+ CTRL1_ODR0 = 0x10,
+ CTRL1_ODR1 = 0x20,
+ CTRL1_ODR2 = 0x40,
+ CTRL1_ODR3 = 0x80,
+};
+
enum lis3lv02d_ctrl2 {
CTRL2_DAS = 0x01,
CTRL2_SIM = 0x02,
@@ -129,9 +139,18 @@ enum lis3lv02d_ctrl2 {
CTRL2_FS = 0x80, /* Full Scale selection */
};
+enum lis3lv02d_ctrl4_3dc {
+ CTRL4_SIM = 0x01,
+ CTRL4_ST0 = 0x02,
+ CTRL4_ST1 = 0x04,
+ CTRL4_FS0 = 0x10,
+ CTRL4_FS1 = 0x20,
+};
+
enum lis302d_ctrl2 {
HP_FF_WU2 = 0x08,
HP_FF_WU1 = 0x04,
+ CTRL2_BOOT_8B = 0x40,
};
enum lis3lv02d_ctrl3 {
@@ -206,19 +225,33 @@ enum lis3lv02d_click_src_8b {
CLICK_IA = 0x40,
};
-struct axis_conversion {
- s8 x;
- s8 y;
- s8 z;
+enum lis3lv02d_reg_state {
+ LIS3_REG_OFF = 0x00,
+ LIS3_REG_ON = 0x01,
+};
+
+union axis_conversion {
+ struct {
+ int x, y, z;
+ };
+ int as_array[3];
+
};
struct lis3lv02d {
void *bus_priv; /* used by the bus layer only */
+ struct device *pm_dev; /* for pm_runtime purposes */
int (*init) (struct lis3lv02d *lis3);
int (*write) (struct lis3lv02d *lis3, int reg, u8 val);
int (*read) (struct lis3lv02d *lis3, int reg, u8 *ret);
+ int (*blkread) (struct lis3lv02d *lis3, int reg, int len, u8 *ret);
+ int (*reg_ctrl) (struct lis3lv02d *lis3, bool state);
int *odrs; /* Supported output data rates */
+ u8 *regs; /* Regs to store / restore */
+ int regs_size;
+ u8 *reg_cache;
+ bool regs_stored;
u8 odr_mask; /* ODR bit mask */
u8 whoami; /* indicates measurement precision */
s16 (*read_data) (struct lis3lv02d *lis3, int reg);
@@ -231,14 +264,18 @@ struct lis3lv02d {
struct input_polled_dev *idev; /* input device */
struct platform_device *pdev; /* platform device */
+ struct regulator_bulk_data regulators[2];
atomic_t count; /* interrupt count after last read */
- struct axis_conversion ac; /* hw -> logical axis */
+ union axis_conversion ac; /* hw -> logical axis */
int mapped_btns[3];
u32 irq; /* IRQ number */
struct fasync_struct *async_queue; /* queue for the misc device */
wait_queue_head_t misc_wait; /* Wait queue for the misc device */
unsigned long misc_opened; /* bit0: whether the device is open */
+ int data_ready_count[2];
+ atomic_t wake_thread;
+ unsigned char irq_cfg;
struct lis3lv02d_platform_data *pdata; /* for passing board config */
struct mutex mutex; /* Serialize poll and selftest */
diff --git a/drivers/hwmon/lis3lv02d_i2c.c b/drivers/hwmon/lis3lv02d_i2c.c
index 8e5933b72d1..9f4bae07f71 100644
--- a/drivers/hwmon/lis3lv02d_i2c.c
+++ b/drivers/hwmon/lis3lv02d_i2c.c
@@ -29,10 +29,30 @@
#include <linux/init.h>
#include <linux/err.h>
#include <linux/i2c.h>
+#include <linux/pm_runtime.h>
+#include <linux/delay.h>
#include "lis3lv02d.h"
#define DRV_NAME "lis3lv02d_i2c"
+static const char reg_vdd[] = "Vdd";
+static const char reg_vdd_io[] = "Vdd_IO";
+
+static int lis3_reg_ctrl(struct lis3lv02d *lis3, bool state)
+{
+ int ret;
+ if (state == LIS3_REG_OFF) {
+ ret = regulator_bulk_disable(ARRAY_SIZE(lis3->regulators),
+ lis3->regulators);
+ } else {
+ ret = regulator_bulk_enable(ARRAY_SIZE(lis3->regulators),
+ lis3->regulators);
+ /* Chip needs time to wakeup. Not mentioned in datasheet */
+ usleep_range(10000, 20000);
+ }
+ return ret;
+}
+
static inline s32 lis3_i2c_write(struct lis3lv02d *lis3, int reg, u8 value)
{
struct i2c_client *c = lis3->bus_priv;
@@ -46,24 +66,38 @@ static inline s32 lis3_i2c_read(struct lis3lv02d *lis3, int reg, u8 *v)
return 0;
}
+static inline s32 lis3_i2c_blockread(struct lis3lv02d *lis3, int reg, int len,
+ u8 *v)
+{
+ struct i2c_client *c = lis3->bus_priv;
+ reg |= (1 << 7); /* 7th bit enables address auto incrementation */
+ return i2c_smbus_read_i2c_block_data(c, reg, len, v);
+}
+
static int lis3_i2c_init(struct lis3lv02d *lis3)
{
u8 reg;
int ret;
+ if (lis3->reg_ctrl)
+ lis3_reg_ctrl(lis3, LIS3_REG_ON);
+
+ lis3->read(lis3, WHO_AM_I, &reg);
+ if (reg != lis3->whoami)
+ printk(KERN_ERR "lis3: power on failure\n");
+
/* power up the device */
ret = lis3->read(lis3, CTRL_REG1, &reg);
if (ret < 0)
return ret;
- reg |= CTRL1_PD0;
+ reg |= CTRL1_PD0 | CTRL1_Xen | CTRL1_Yen | CTRL1_Zen;
return lis3->write(lis3, CTRL_REG1, reg);
}
/* Default axis mapping but it can be overwritten by platform data */
-static struct axis_conversion lis3lv02d_axis_map = { LIS3_DEV_X,
- LIS3_DEV_Y,
- LIS3_DEV_Z };
+static union axis_conversion lis3lv02d_axis_map =
+ { .as_array = { LIS3_DEV_X, LIS3_DEV_Y, LIS3_DEV_Z } };
static int __devinit lis3lv02d_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
@@ -72,6 +106,15 @@ static int __devinit lis3lv02d_i2c_probe(struct i2c_client *client,
struct lis3lv02d_platform_data *pdata = client->dev.platform_data;
if (pdata) {
+ /* Regulator control is optional */
+ if (pdata->driver_features & LIS3_USE_REGULATOR_CTRL)
+ lis3_dev.reg_ctrl = lis3_reg_ctrl;
+
+ if ((pdata->driver_features & LIS3_USE_BLOCK_READ) &&
+ (i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_I2C_BLOCK)))
+ lis3_dev.blkread = lis3_i2c_blockread;
+
if (pdata->axis_x)
lis3lv02d_axis_map.x = pdata->axis_x;
@@ -88,6 +131,16 @@ static int __devinit lis3lv02d_i2c_probe(struct i2c_client *client,
goto fail;
}
+ if (lis3_dev.reg_ctrl) {
+ lis3_dev.regulators[0].supply = reg_vdd;
+ lis3_dev.regulators[1].supply = reg_vdd_io;
+ ret = regulator_bulk_get(&client->dev,
+ ARRAY_SIZE(lis3_dev.regulators),
+ lis3_dev.regulators);
+ if (ret < 0)
+ goto fail;
+ }
+
lis3_dev.pdata = pdata;
lis3_dev.bus_priv = client;
lis3_dev.init = lis3_i2c_init;
@@ -95,10 +148,24 @@ static int __devinit lis3lv02d_i2c_probe(struct i2c_client *client,
lis3_dev.write = lis3_i2c_write;
lis3_dev.irq = client->irq;
lis3_dev.ac = lis3lv02d_axis_map;
+ lis3_dev.pm_dev = &client->dev;
i2c_set_clientdata(client, &lis3_dev);
+
+ /* Provide power over the init call */
+ if (lis3_dev.reg_ctrl)
+ lis3_reg_ctrl(&lis3_dev, LIS3_REG_ON);
+
ret = lis3lv02d_init_device(&lis3_dev);
+
+ if (lis3_dev.reg_ctrl)
+ lis3_reg_ctrl(&lis3_dev, LIS3_REG_OFF);
+
+ if (ret == 0)
+ return 0;
fail:
+ if (pdata && pdata->release_resources)
+ pdata->release_resources();
return ret;
}
@@ -111,14 +178,18 @@ static int __devexit lis3lv02d_i2c_remove(struct i2c_client *client)
pdata->release_resources();
lis3lv02d_joystick_disable();
- lis3lv02d_poweroff(lis3);
+ lis3lv02d_remove_fs(&lis3_dev);
- return lis3lv02d_remove_fs(&lis3_dev);
+ if (lis3_dev.reg_ctrl)
+ regulator_bulk_free(ARRAY_SIZE(lis3->regulators),
+ lis3_dev.regulators);
+ return 0;
}
#ifdef CONFIG_PM
-static int lis3lv02d_i2c_suspend(struct i2c_client *client, pm_message_t mesg)
+static int lis3lv02d_i2c_suspend(struct device *dev)
{
+ struct i2c_client *client = container_of(dev, struct i2c_client, dev);
struct lis3lv02d *lis3 = i2c_get_clientdata(client);
if (!lis3->pdata || !lis3->pdata->wakeup_flags)
@@ -126,18 +197,21 @@ static int lis3lv02d_i2c_suspend(struct i2c_client *client, pm_message_t mesg)
return 0;
}
-static int lis3lv02d_i2c_resume(struct i2c_client *client)
+static int lis3lv02d_i2c_resume(struct device *dev)
{
+ struct i2c_client *client = container_of(dev, struct i2c_client, dev);
struct lis3lv02d *lis3 = i2c_get_clientdata(client);
- if (!lis3->pdata || !lis3->pdata->wakeup_flags)
+ /*
+ * pm_runtime documentation says that devices should always
+ * be powered on at resume. Pm_runtime turns them off after system
+ * wide resume is complete.
+ */
+ if (!lis3->pdata || !lis3->pdata->wakeup_flags ||
+ pm_runtime_suspended(dev))
lis3lv02d_poweron(lis3);
- return 0;
-}
-static void lis3lv02d_i2c_shutdown(struct i2c_client *client)
-{
- lis3lv02d_i2c_suspend(client, PMSG_SUSPEND);
+ return 0;
}
#else
#define lis3lv02d_i2c_suspend NULL
@@ -145,6 +219,24 @@ static void lis3lv02d_i2c_shutdown(struct i2c_client *client)
#define lis3lv02d_i2c_shutdown NULL
#endif
+static int lis3_i2c_runtime_suspend(struct device *dev)
+{
+ struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+ struct lis3lv02d *lis3 = i2c_get_clientdata(client);
+
+ lis3lv02d_poweroff(lis3);
+ return 0;
+}
+
+static int lis3_i2c_runtime_resume(struct device *dev)
+{
+ struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+ struct lis3lv02d *lis3 = i2c_get_clientdata(client);
+
+ lis3lv02d_poweron(lis3);
+ return 0;
+}
+
static const struct i2c_device_id lis3lv02d_id[] = {
{"lis3lv02d", 0 },
{}
@@ -152,14 +244,20 @@ static const struct i2c_device_id lis3lv02d_id[] = {
MODULE_DEVICE_TABLE(i2c, lis3lv02d_id);
+static const struct dev_pm_ops lis3_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(lis3lv02d_i2c_suspend,
+ lis3lv02d_i2c_resume)
+ SET_RUNTIME_PM_OPS(lis3_i2c_runtime_suspend,
+ lis3_i2c_runtime_resume,
+ NULL)
+};
+
static struct i2c_driver lis3lv02d_i2c_driver = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
+ .pm = &lis3_pm_ops,
},
- .suspend = lis3lv02d_i2c_suspend,
- .shutdown = lis3lv02d_i2c_shutdown,
- .resume = lis3lv02d_i2c_resume,
.probe = lis3lv02d_i2c_probe,
.remove = __devexit_p(lis3lv02d_i2c_remove),
.id_table = lis3lv02d_id,
diff --git a/drivers/hwmon/lis3lv02d_spi.c b/drivers/hwmon/lis3lv02d_spi.c
index b9be5e3a22b..2549de1de4e 100644
--- a/drivers/hwmon/lis3lv02d_spi.c
+++ b/drivers/hwmon/lis3lv02d_spi.c
@@ -50,11 +50,12 @@ static int lis3_spi_init(struct lis3lv02d *lis3)
if (ret < 0)
return ret;
- reg |= CTRL1_PD0;
+ reg |= CTRL1_PD0 | CTRL1_Xen | CTRL1_Yen | CTRL1_Zen;
return lis3->write(lis3, CTRL_REG1, reg);
}
-static struct axis_conversion lis3lv02d_axis_normal = { 1, 2, 3 };
+static union axis_conversion lis3lv02d_axis_normal =
+ { .as_array = { 1, 2, 3 } };
static int __devinit lis302dl_spi_probe(struct spi_device *spi)
{
diff --git a/drivers/hwmon/ltc4261.c b/drivers/hwmon/ltc4261.c
new file mode 100644
index 00000000000..26762617867
--- /dev/null
+++ b/drivers/hwmon/ltc4261.c
@@ -0,0 +1,315 @@
+/*
+ * Driver for Linear Technology LTC4261 I2C Negative Voltage Hot Swap Controller
+ *
+ * Copyright (C) 2010 Ericsson AB.
+ *
+ * Derived from:
+ *
+ * Driver for Linear Technology LTC4245 I2C Multiple Supply Hot Swap Controller
+ * Copyright (C) 2008 Ira W. Snyder <iws@ovro.caltech.edu>
+ *
+ * Datasheet: http://cds.linear.com/docs/Datasheet/42612fb.pdf
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+
+/* chip registers */
+#define LTC4261_STATUS 0x00 /* readonly */
+#define LTC4261_FAULT 0x01
+#define LTC4261_ALERT 0x02
+#define LTC4261_CONTROL 0x03
+#define LTC4261_SENSE_H 0x04
+#define LTC4261_SENSE_L 0x05
+#define LTC4261_ADIN2_H 0x06
+#define LTC4261_ADIN2_L 0x07
+#define LTC4261_ADIN_H 0x08
+#define LTC4261_ADIN_L 0x09
+
+/*
+ * Fault register bits
+ */
+#define FAULT_OV (1<<0)
+#define FAULT_UV (1<<1)
+#define FAULT_OC (1<<2)
+
+struct ltc4261_data {
+ struct device *hwmon_dev;
+
+ struct mutex update_lock;
+ bool valid;
+ unsigned long last_updated; /* in jiffies */
+
+ /* Registers */
+ u8 regs[10];
+};
+
+static struct ltc4261_data *ltc4261_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct ltc4261_data *data = i2c_get_clientdata(client);
+ struct ltc4261_data *ret = data;
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + HZ / 4) || !data->valid) {
+ int i;
+
+ /* Read registers -- 0x00 to 0x09 */
+ for (i = 0; i < ARRAY_SIZE(data->regs); i++) {
+ int val;
+
+ val = i2c_smbus_read_byte_data(client, i);
+ if (unlikely(val < 0)) {
+ dev_dbg(dev,
+ "Failed to read ADC value: error %d",
+ val);
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->regs[i] = val;
+ }
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+abort:
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
+/* Return the voltage from the given register in mV or mA */
+static int ltc4261_get_value(struct ltc4261_data *data, u8 reg)
+{
+ u32 val;
+
+ val = (data->regs[reg] << 2) + (data->regs[reg + 1] >> 6);
+
+ switch (reg) {
+ case LTC4261_ADIN_H:
+ case LTC4261_ADIN2_H:
+ /* 2.5mV resolution. Convert to mV. */
+ val = val * 25 / 10;
+ break;
+ case LTC4261_SENSE_H:
+ /*
+ * 62.5uV resolution. Convert to current as measured with
+ * an 1 mOhm sense resistor, in mA. If a different sense
+ * resistor is installed, calculate the actual current by
+ * dividing the reported current by the sense resistor value
+ * in mOhm.
+ */
+ val = val * 625 / 10;
+ break;
+ default:
+ /* If we get here, the developer messed up */
+ WARN_ON_ONCE(1);
+ val = 0;
+ break;
+ }
+
+ return val;
+}
+
+static ssize_t ltc4261_show_value(struct device *dev,
+ struct device_attribute *da, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ struct ltc4261_data *data = ltc4261_update_device(dev);
+ int value;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ value = ltc4261_get_value(data, attr->index);
+ return snprintf(buf, PAGE_SIZE, "%d\n", value);
+}
+
+static ssize_t ltc4261_show_bool(struct device *dev,
+ struct device_attribute *da, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct ltc4261_data *data = ltc4261_update_device(dev);
+ u8 fault;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ fault = data->regs[LTC4261_FAULT] & attr->index;
+ if (fault) /* Clear reported faults in chip register */
+ i2c_smbus_write_byte_data(client, LTC4261_FAULT, ~fault);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", fault ? 1 : 0);
+}
+
+/*
+ * These macros are used below in constructing device attribute objects
+ * for use with sysfs_create_group() to make a sysfs device file
+ * for each register.
+ */
+
+#define LTC4261_VALUE(name, ltc4261_cmd_idx) \
+ static SENSOR_DEVICE_ATTR(name, S_IRUGO, \
+ ltc4261_show_value, NULL, ltc4261_cmd_idx)
+
+#define LTC4261_BOOL(name, mask) \
+ static SENSOR_DEVICE_ATTR(name, S_IRUGO, \
+ ltc4261_show_bool, NULL, (mask))
+
+/*
+ * Input voltages.
+ */
+LTC4261_VALUE(in1_input, LTC4261_ADIN_H);
+LTC4261_VALUE(in2_input, LTC4261_ADIN2_H);
+
+/*
+ * Voltage alarms. The chip has only one set of voltage alarm status bits,
+ * triggered by input voltage alarms. In many designs, those alarms are
+ * associated with the ADIN2 sensor, due to the proximity of the ADIN2 pin
+ * to the OV pin. ADIN2 is, however, not available on all chip variants.
+ * To ensure that the alarm condition is reported to the user, report it
+ * with both voltage sensors.
+ */
+LTC4261_BOOL(in1_min_alarm, FAULT_UV);
+LTC4261_BOOL(in1_max_alarm, FAULT_OV);
+LTC4261_BOOL(in2_min_alarm, FAULT_UV);
+LTC4261_BOOL(in2_max_alarm, FAULT_OV);
+
+/* Currents (via sense resistor) */
+LTC4261_VALUE(curr1_input, LTC4261_SENSE_H);
+
+/* Overcurrent alarm */
+LTC4261_BOOL(curr1_max_alarm, FAULT_OC);
+
+static struct attribute *ltc4261_attributes[] = {
+ &sensor_dev_attr_in1_input.dev_attr.attr,
+ &sensor_dev_attr_in1_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_in1_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_in2_input.dev_attr.attr,
+ &sensor_dev_attr_in2_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_in2_max_alarm.dev_attr.attr,
+
+ &sensor_dev_attr_curr1_input.dev_attr.attr,
+ &sensor_dev_attr_curr1_max_alarm.dev_attr.attr,
+
+ NULL,
+};
+
+static const struct attribute_group ltc4261_group = {
+ .attrs = ltc4261_attributes,
+};
+
+static int ltc4261_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ struct ltc4261_data *data;
+ int ret;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
+
+ if (i2c_smbus_read_byte_data(client, LTC4261_STATUS) < 0) {
+ dev_err(&client->dev, "Failed to read register %d:%02x:%02x\n",
+ adapter->id, client->addr, LTC4261_STATUS);
+ return -ENODEV;
+ }
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ ret = -ENOMEM;
+ goto out_kzalloc;
+ }
+
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+
+ /* Clear faults */
+ i2c_smbus_write_byte_data(client, LTC4261_FAULT, 0x00);
+
+ /* Register sysfs hooks */
+ ret = sysfs_create_group(&client->dev.kobj, &ltc4261_group);
+ if (ret)
+ goto out_sysfs_create_group;
+
+ data->hwmon_dev = hwmon_device_register(&client->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ ret = PTR_ERR(data->hwmon_dev);
+ goto out_hwmon_device_register;
+ }
+
+ return 0;
+
+out_hwmon_device_register:
+ sysfs_remove_group(&client->dev.kobj, &ltc4261_group);
+out_sysfs_create_group:
+ kfree(data);
+out_kzalloc:
+ return ret;
+}
+
+static int ltc4261_remove(struct i2c_client *client)
+{
+ struct ltc4261_data *data = i2c_get_clientdata(client);
+
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&client->dev.kobj, &ltc4261_group);
+
+ kfree(data);
+
+ return 0;
+}
+
+static const struct i2c_device_id ltc4261_id[] = {
+ {"ltc4261", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, ltc4261_id);
+
+/* This is the driver that will be inserted */
+static struct i2c_driver ltc4261_driver = {
+ .driver = {
+ .name = "ltc4261",
+ },
+ .probe = ltc4261_probe,
+ .remove = ltc4261_remove,
+ .id_table = ltc4261_id,
+};
+
+static int __init ltc4261_init(void)
+{
+ return i2c_add_driver(&ltc4261_driver);
+}
+
+static void __exit ltc4261_exit(void)
+{
+ i2c_del_driver(&ltc4261_driver);
+}
+
+MODULE_AUTHOR("Guenter Roeck <guenter.roeck@ericsson.com>");
+MODULE_DESCRIPTION("LTC4261 driver");
+MODULE_LICENSE("GPL");
+
+module_init(ltc4261_init);
+module_exit(ltc4261_exit);
diff --git a/drivers/hwmon/pkgtemp.c b/drivers/hwmon/pkgtemp.c
index f11903936c8..0798210590b 100644
--- a/drivers/hwmon/pkgtemp.c
+++ b/drivers/hwmon/pkgtemp.c
@@ -21,7 +21,6 @@
*/
#include <linux/module.h>
-#include <linux/delay.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
@@ -35,6 +34,7 @@
#include <linux/cpu.h>
#include <asm/msr.h>
#include <asm/processor.h>
+#include <asm/smp.h>
#define DRVNAME "pkgtemp"
@@ -339,8 +339,7 @@ exit:
return err;
}
-#ifdef CONFIG_HOTPLUG_CPU
-static void pkgtemp_device_remove(unsigned int cpu)
+static void __cpuinit pkgtemp_device_remove(unsigned int cpu)
{
struct pdev_entry *p;
unsigned int i;
@@ -387,12 +386,10 @@ static int __cpuinit pkgtemp_cpu_callback(struct notifier_block *nfb,
static struct notifier_block pkgtemp_cpu_notifier __refdata = {
.notifier_call = pkgtemp_cpu_callback,
};
-#endif /* !CONFIG_HOTPLUG_CPU */
static int __init pkgtemp_init(void)
{
int i, err = -ENODEV;
- struct pdev_entry *p, *n;
/* quick check if we run Intel */
if (cpu_data(0).x86_vendor != X86_VENDOR_INTEL)
@@ -402,31 +399,23 @@ static int __init pkgtemp_init(void)
if (err)
goto exit;
- for_each_online_cpu(i) {
- err = pkgtemp_device_add(i);
- if (err)
- goto exit_devices_unreg;
- }
+ for_each_online_cpu(i)
+ pkgtemp_device_add(i);
+
+#ifndef CONFIG_HOTPLUG_CPU
if (list_empty(&pdev_list)) {
err = -ENODEV;
goto exit_driver_unreg;
}
+#endif
-#ifdef CONFIG_HOTPLUG_CPU
register_hotcpu_notifier(&pkgtemp_cpu_notifier);
-#endif
return 0;
-exit_devices_unreg:
- mutex_lock(&pdev_list_mutex);
- list_for_each_entry_safe(p, n, &pdev_list, list) {
- platform_device_unregister(p->pdev);
- list_del(&p->list);
- kfree(p);
- }
- mutex_unlock(&pdev_list_mutex);
+#ifndef CONFIG_HOTPLUG_CPU
exit_driver_unreg:
platform_driver_unregister(&pkgtemp_driver);
+#endif
exit:
return err;
}
@@ -434,9 +423,8 @@ exit:
static void __exit pkgtemp_exit(void)
{
struct pdev_entry *p, *n;
-#ifdef CONFIG_HOTPLUG_CPU
+
unregister_hotcpu_notifier(&pkgtemp_cpu_notifier);
-#endif
mutex_lock(&pdev_list_mutex);
list_for_each_entry_safe(p, n, &pdev_list, list) {
platform_device_unregister(p->pdev);
diff --git a/drivers/hwmon/via-cputemp.c b/drivers/hwmon/via-cputemp.c
index ffb793af680..ec7fad747ad 100644
--- a/drivers/hwmon/via-cputemp.c
+++ b/drivers/hwmon/via-cputemp.c
@@ -22,10 +22,8 @@
*/
#include <linux/module.h>
-#include <linux/delay.h>
#include <linux/init.h>
#include <linux/slab.h>
-#include <linux/jiffies.h>
#include <linux/hwmon.h>
#include <linux/sysfs.h>
#include <linux/hwmon-sysfs.h>
@@ -237,8 +235,7 @@ exit:
return err;
}
-#ifdef CONFIG_HOTPLUG_CPU
-static void via_cputemp_device_remove(unsigned int cpu)
+static void __cpuinit via_cputemp_device_remove(unsigned int cpu)
{
struct pdev_entry *p, *n;
mutex_lock(&pdev_list_mutex);
@@ -272,7 +269,6 @@ static int __cpuinit via_cputemp_cpu_callback(struct notifier_block *nfb,
static struct notifier_block via_cputemp_cpu_notifier __refdata = {
.notifier_call = via_cputemp_cpu_callback,
};
-#endif /* !CONFIG_HOTPLUG_CPU */
static int __init via_cputemp_init(void)
{
@@ -313,9 +309,7 @@ static int __init via_cputemp_init(void)
goto exit_driver_unreg;
}
-#ifdef CONFIG_HOTPLUG_CPU
register_hotcpu_notifier(&via_cputemp_cpu_notifier);
-#endif
return 0;
exit_devices_unreg:
@@ -335,9 +329,8 @@ exit:
static void __exit via_cputemp_exit(void)
{
struct pdev_entry *p, *n;
-#ifdef CONFIG_HOTPLUG_CPU
+
unregister_hotcpu_notifier(&via_cputemp_cpu_notifier);
-#endif
mutex_lock(&pdev_list_mutex);
list_for_each_entry_safe(p, n, &pdev_list, list) {
platform_device_unregister(p->pdev);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-04 08:10:08 +0000