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-rw-r--r--drivers/gpio/Kconfig12
-rw-r--r--drivers/gpio/Makefile1
-rw-r--r--drivers/gpio/ucb1400_gpio.c125
-rw-r--r--drivers/mfd/ucb1400_core.c31
-rw-r--r--include/linux/ucb1400.h19
5 files changed, 184 insertions, 4 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 223e7c92fd5..ccca08e0b59 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -202,4 +202,16 @@ config GPIO_MC33880
SPI driver for Freescale MC33880 high-side/low-side switch.
This provides GPIO interface supporting inputs and outputs.
+comment "AC97 GPIO expanders:"
+
+config GPIO_UCB1400
+ bool "Philips UCB1400 GPIO"
+ depends on UCB1400_CORE
+ help
+ This enables support for the Philips UCB1400 GPIO pins.
+ The UCB1400 is an AC97 audio codec.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ucb1400_gpio.
+
endif
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index f35de16c7c4..c1ac034698c 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_GPIO_PCA953X) += pca953x.o
obj-$(CONFIG_GPIO_PCF857X) += pcf857x.o
obj-$(CONFIG_GPIO_PL061) += pl061.o
obj-$(CONFIG_GPIO_TWL4030) += twl4030-gpio.o
+obj-$(CONFIG_GPIO_UCB1400) += ucb1400_gpio.o
obj-$(CONFIG_GPIO_XILINX) += xilinx_gpio.o
obj-$(CONFIG_GPIO_BT8XX) += bt8xxgpio.o
obj-$(CONFIG_GPIO_VR41XX) += vr41xx_giu.o
diff --git a/drivers/gpio/ucb1400_gpio.c b/drivers/gpio/ucb1400_gpio.c
new file mode 100644
index 00000000000..50e6bd1392c
--- /dev/null
+++ b/drivers/gpio/ucb1400_gpio.c
@@ -0,0 +1,125 @@
+/*
+ * Philips UCB1400 GPIO driver
+ *
+ * Author: Marek Vasut <marek.vasut@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/ucb1400.h>
+
+struct ucb1400_gpio_data *ucbdata;
+
+static int ucb1400_gpio_dir_in(struct gpio_chip *gc, unsigned off)
+{
+ struct ucb1400_gpio *gpio;
+ gpio = container_of(gc, struct ucb1400_gpio, gc);
+ ucb1400_gpio_set_direction(gpio->ac97, off, 0);
+ return 0;
+}
+
+static int ucb1400_gpio_dir_out(struct gpio_chip *gc, unsigned off, int val)
+{
+ struct ucb1400_gpio *gpio;
+ gpio = container_of(gc, struct ucb1400_gpio, gc);
+ ucb1400_gpio_set_direction(gpio->ac97, off, 1);
+ ucb1400_gpio_set_value(gpio->ac97, off, val);
+ return 0;
+}
+
+static int ucb1400_gpio_get(struct gpio_chip *gc, unsigned off)
+{
+ struct ucb1400_gpio *gpio;
+ gpio = container_of(gc, struct ucb1400_gpio, gc);
+ return ucb1400_gpio_get_value(gpio->ac97, off);
+}
+
+static void ucb1400_gpio_set(struct gpio_chip *gc, unsigned off, int val)
+{
+ struct ucb1400_gpio *gpio;
+ gpio = container_of(gc, struct ucb1400_gpio, gc);
+ ucb1400_gpio_set_value(gpio->ac97, off, val);
+}
+
+static int ucb1400_gpio_probe(struct platform_device *dev)
+{
+ struct ucb1400_gpio *ucb = dev->dev.platform_data;
+ int err = 0;
+
+ if (!(ucbdata && ucbdata->gpio_offset)) {
+ err = -EINVAL;
+ goto err;
+ }
+
+ platform_set_drvdata(dev, ucb);
+
+ ucb->gc.label = "ucb1400_gpio";
+ ucb->gc.base = ucbdata->gpio_offset;
+ ucb->gc.ngpio = 10;
+ ucb->gc.owner = THIS_MODULE;
+
+ ucb->gc.direction_input = ucb1400_gpio_dir_in;
+ ucb->gc.direction_output = ucb1400_gpio_dir_out;
+ ucb->gc.get = ucb1400_gpio_get;
+ ucb->gc.set = ucb1400_gpio_set;
+ ucb->gc.can_sleep = 1;
+
+ err = gpiochip_add(&ucb->gc);
+ if (err)
+ goto err;
+
+ if (ucbdata && ucbdata->gpio_setup)
+ err = ucbdata->gpio_setup(&dev->dev, ucb->gc.ngpio);
+
+err:
+ return err;
+
+}
+
+static int ucb1400_gpio_remove(struct platform_device *dev)
+{
+ int err = 0;
+ struct ucb1400_gpio *ucb = platform_get_drvdata(dev);
+
+ if (ucbdata && ucbdata->gpio_teardown) {
+ err = ucbdata->gpio_teardown(&dev->dev, ucb->gc.ngpio);
+ if (err)
+ return err;
+ }
+
+ err = gpiochip_remove(&ucb->gc);
+ return err;
+}
+
+static struct platform_driver ucb1400_gpio_driver = {
+ .probe = ucb1400_gpio_probe,
+ .remove = ucb1400_gpio_remove,
+ .driver = {
+ .name = "ucb1400_gpio"
+ },
+};
+
+static int __init ucb1400_gpio_init(void)
+{
+ return platform_driver_register(&ucb1400_gpio_driver);
+}
+
+static void __exit ucb1400_gpio_exit(void)
+{
+ platform_driver_unregister(&ucb1400_gpio_driver);
+}
+
+void __init ucb1400_gpio_set_data(struct ucb1400_gpio_data *data)
+{
+ ucbdata = data;
+}
+
+module_init(ucb1400_gpio_init);
+module_exit(ucb1400_gpio_exit);
+
+MODULE_DESCRIPTION("Philips UCB1400 GPIO driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mfd/ucb1400_core.c b/drivers/mfd/ucb1400_core.c
index 78c2135c5de..2afc08006e6 100644
--- a/drivers/mfd/ucb1400_core.c
+++ b/drivers/mfd/ucb1400_core.c
@@ -48,9 +48,11 @@ static int ucb1400_core_probe(struct device *dev)
int err;
struct ucb1400 *ucb;
struct ucb1400_ts ucb_ts;
+ struct ucb1400_gpio ucb_gpio;
struct snd_ac97 *ac97;
memset(&ucb_ts, 0, sizeof(ucb_ts));
+ memset(&ucb_gpio, 0, sizeof(ucb_gpio));
ucb = kzalloc(sizeof(struct ucb1400), GFP_KERNEL);
if (!ucb) {
@@ -68,25 +70,44 @@ static int ucb1400_core_probe(struct device *dev)
goto err0;
}
+ /* GPIO */
+ ucb_gpio.ac97 = ac97;
+ ucb->ucb1400_gpio = platform_device_alloc("ucb1400_gpio", -1);
+ if (!ucb->ucb1400_gpio) {
+ err = -ENOMEM;
+ goto err0;
+ }
+ err = platform_device_add_data(ucb->ucb1400_gpio, &ucb_gpio,
+ sizeof(ucb_gpio));
+ if (err)
+ goto err1;
+ err = platform_device_add(ucb->ucb1400_gpio);
+ if (err)
+ goto err1;
+
/* TOUCHSCREEN */
ucb_ts.ac97 = ac97;
ucb->ucb1400_ts = platform_device_alloc("ucb1400_ts", -1);
if (!ucb->ucb1400_ts) {
err = -ENOMEM;
- goto err0;
+ goto err2;
}
err = platform_device_add_data(ucb->ucb1400_ts, &ucb_ts,
sizeof(ucb_ts));
if (err)
- goto err1;
+ goto err3;
err = platform_device_add(ucb->ucb1400_ts);
if (err)
- goto err1;
+ goto err3;
return 0;
-err1:
+err3:
platform_device_put(ucb->ucb1400_ts);
+err2:
+ platform_device_unregister(ucb->ucb1400_gpio);
+err1:
+ platform_device_put(ucb->ucb1400_gpio);
err0:
kfree(ucb);
err:
@@ -98,6 +119,8 @@ static int ucb1400_core_remove(struct device *dev)
struct ucb1400 *ucb = dev_get_drvdata(dev);
platform_device_unregister(ucb->ucb1400_ts);
+ platform_device_unregister(ucb->ucb1400_gpio);
+
kfree(ucb);
return 0;
}
diff --git a/include/linux/ucb1400.h b/include/linux/ucb1400.h
index ae779bb8cc0..adb44066680 100644
--- a/include/linux/ucb1400.h
+++ b/include/linux/ucb1400.h
@@ -26,6 +26,7 @@
#include <sound/ac97_codec.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
+#include <linux/gpio.h>
/*
* UCB1400 AC-link registers
@@ -82,6 +83,17 @@
#define UCB_ID 0x7e
#define UCB_ID_1400 0x4304
+struct ucb1400_gpio_data {
+ int gpio_offset;
+ int (*gpio_setup)(struct device *dev, int ngpio);
+ int (*gpio_teardown)(struct device *dev, int ngpio);
+};
+
+struct ucb1400_gpio {
+ struct gpio_chip gc;
+ struct snd_ac97 *ac97;
+};
+
struct ucb1400_ts {
struct input_dev *ts_idev;
struct task_struct *ts_task;
@@ -95,6 +107,7 @@ struct ucb1400_ts {
struct ucb1400 {
struct platform_device *ucb1400_ts;
+ struct platform_device *ucb1400_gpio;
};
static inline u16 ucb1400_reg_read(struct snd_ac97 *ac97, u16 reg)
@@ -147,4 +160,10 @@ static inline void ucb1400_adc_disable(struct snd_ac97 *ac97)
unsigned int ucb1400_adc_read(struct snd_ac97 *ac97, u16 adc_channel,
int adcsync);
+#ifdef CONFIG_GPIO_UCB1400
+void __init ucb1400_gpio_set_data(struct ucb1400_gpio_data *data);
+#else
+static inline void ucb1400_gpio_set_data(struct ucb1400_gpio_data *data) {}
+#endif
+
#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 23:37:13 +0000