gpio: adp5585: add gpio driver for ADP5585 I/O Expander Controller

Add gpio driver for ADP5585 I/O Expander Controller. The ADP5585 is a 10
input/output port expander and can be used to increase the number of
I/Os available to a processor.

Signed-off-by: Alice Guo <alice.guo@nxp.com>

3 files changed, 245 insertions, 0 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 2a60478b47..220e2cb162 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -611,4 +611,10 @@ config FTGPIO010
 	help
 	   Support for GPIOs on Faraday Technology's FTGPIO010 controller.
 
+config ADP5585_GPIO
+	bool "ADP5585 GPIO driver"
+	depends on DM_GPIO && DM_I2C
+	help
+	  Support ADP5585 GPIO expander.
+
 endif
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index eee7908871..7235714fcc 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -76,3 +76,4 @@ obj-$(CONFIG_ZYNQMP_GPIO_MODEPIN)	+= zynqmp_gpio_modepin.o
 obj-$(CONFIG_SLG7XL45106_I2C_GPO)	+= gpio_slg7xl45106.o
 obj-$(CONFIG_$(SPL_TPL_)TURRIS_OMNIA_MCU)	+= turris_omnia_mcu.o
 obj-$(CONFIG_FTGPIO010)		+= ftgpio010.o
+obj-$(CONFIG_ADP5585_GPIO)	+= adp5585_gpio.o
diff --git a/drivers/gpio/adp5585_gpio.c b/drivers/gpio/adp5585_gpio.c
new file mode 100644
index 0000000000..ea0cb75459
--- /dev/null
+++ b/drivers/gpio/adp5585_gpio.c
@@ -0,0 +1,238 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2022 NXP
+ *
+ * ADP5585 I/O Expander Controller
+ *
+ * Author: Alice Guo <alice.guo@nxp.com>
+ */
+
+#include <asm/gpio.h>
+#include <dm.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <i2c.h>
+
+#define ADP5585_ID			0x00
+#define ADP5585_INT_STATUS		0x01
+#define ADP5585_STATUS			0x02
+#define ADP5585_FIFO_1			0x03
+#define ADP5585_FIFO_2			0x04
+#define ADP5585_FIFO_3			0x05
+#define ADP5585_FIFO_4			0x06
+#define ADP5585_FIFO_5			0x07
+#define ADP5585_FIFO_6			0x08
+#define ADP5585_FIFO_7			0x09
+#define ADP5585_FIFO_8			0x0A
+#define ADP5585_FIFO_9			0x0B
+#define ADP5585_FIFO_10			0x0C
+#define ADP5585_FIFO_11			0x0D
+#define ADP5585_FIFO_12			0x0E
+#define ADP5585_FIFO_13			0x0F
+#define ADP5585_FIFO_14			0x10
+#define ADP5585_FIFO_15			0x11
+#define ADP5585_FIFO_16			0x12
+#define ADP5585_GPI_INT_STAT_A		0x13
+#define ADP5585_GPI_INT_STAT_B		0x14
+#define ADP5585_GPI_STATUS_A		0x15
+#define ADP5585_GPI_STATUS_B		0x16
+#define ADP5585_RPULL_CONFIG_A		0x17
+#define ADP5585_RPULL_CONFIG_B		0x18
+#define ADP5585_RPULL_CONFIG_C		0x19
+#define ADP5585_RPULL_CONFIG_D		0x1A
+#define ADP5585_GPI_INT_LEVEL_A		0x1B
+#define ADP5585_GPI_INT_LEVEL_B		0x1C
+#define ADP5585_GPI_EVENT_EN_A		0x1D
+#define ADP5585_GPI_EVENT_EN_B		0x1E
+#define ADP5585_GPI_INTERRUPT_EN_A	0x1F
+#define ADP5585_GPI_INTERRUPT_EN_B	0x20
+#define ADP5585_DEBOUNCE_DIS_A		0x21
+#define ADP5585_DEBOUNCE_DIS_B		0x22
+#define ADP5585_GPO_DATA_OUT_A		0x23
+#define ADP5585_GPO_DATA_OUT_B		0x24
+#define ADP5585_GPO_OUT_MODE_A		0x25
+#define ADP5585_GPO_OUT_MODE_B		0x26
+#define ADP5585_GPIO_DIRECTION_A	0x27
+#define ADP5585_GPIO_DIRECTION_B	0x28
+#define ADP5585_RESET1_EVENT_A		0x29
+#define ADP5585_RESET1_EVENT_B		0x2A
+#define ADP5585_RESET1_EVENT_C		0x2B
+#define ADP5585_RESET2_EVENT_A		0x2C
+#define ADP5585_RESET2_EVENT_B		0x2D
+#define ADP5585_RESET_CFG		0x2E
+#define ADP5585_PWM_OFFT_LOW		0x2F
+#define ADP5585_PWM_OFFT_HIGH		0x30
+#define ADP5585_PWM_ONT_LOW		0x31
+#define ADP5585_PWM_ONT_HIGH		0x32
+#define ADP5585_PWM_CFG			0x33
+#define ADP5585_LOGIC_CFG		0x34
+#define ADP5585_LOGIC_FF_CFG		0x35
+#define ADP5585_LOGIC_INT_EVENT_EN	0x36
+#define ADP5585_POLL_PTIME_CFG		0x37
+#define ADP5585_PIN_CONFIG_A		0x38
+#define ADP5585_PIN_CONFIG_B		0x39
+#define ADP5585_PIN_CONFIG_D		0x3A
+#define ADP5585_GENERAL_CFG		0x3B
+#define ADP5585_INT_EN			0x3C
+
+#define ADP5585_MAXGPIO			10
+#define ADP5585_BANK(offs)		((offs) > 4)
+#define ADP5585_BIT(offs)		((offs) > 4 ? \
+					1u << ((offs) - 5) : 1u << (offs))
+
+struct adp5585_plat {
+	fdt_addr_t addr;
+	u8 id;
+	u8 dat_out[2];
+	u8 dir[2];
+};
+
+static int adp5585_direction_input(struct udevice *dev, unsigned int offset)
+{
+	int ret;
+	unsigned int bank;
+	struct adp5585_plat *plat = dev_get_plat(dev);
+
+	bank = ADP5585_BANK(offset);
+
+	plat->dir[bank] &= ~ADP5585_BIT(offset);
+	ret = dm_i2c_write(dev, ADP5585_GPIO_DIRECTION_A + bank, &plat->dir[bank], 1);
+
+	return ret;
+}
+
+static int adp5585_direction_output(struct udevice *dev, unsigned int offset,
+				    int value)
+{
+	int ret;
+	unsigned int bank, bit;
+	struct adp5585_plat *plat = dev_get_plat(dev);
+
+	bank =  ADP5585_BANK(offset);
+	bit = ADP5585_BIT(offset);
+
+	plat->dir[bank] |= bit;
+
+	if (value)
+		plat->dat_out[bank] |= bit;
+	else
+		plat->dat_out[bank] &= ~bit;
+
+	ret = dm_i2c_write(dev, ADP5585_GPO_DATA_OUT_A + bank, &plat->dat_out[bank], 1);
+	ret |= dm_i2c_write(dev, ADP5585_GPIO_DIRECTION_A + bank, &plat->dir[bank], 1);
+
+	return ret;
+}
+
+static int adp5585_get_value(struct udevice *dev, unsigned int offset)
+{
+	struct adp5585_plat *plat = dev_get_plat(dev);
+	unsigned int bank = ADP5585_BANK(offset);
+	unsigned int bit = ADP5585_BIT(offset);
+	u8 val;
+
+	if (plat->dir[bank] & bit)
+		val = plat->dat_out[bank];
+	else
+		dm_i2c_read(dev, ADP5585_GPI_STATUS_A + bank, &val, 1);
+
+	return !!(val & bit);
+}
+
+static int adp5585_set_value(struct udevice *dev, unsigned int offset, int value)
+{
+	int ret;
+	unsigned int bank, bit;
+	struct adp5585_plat *plat = dev_get_plat(dev);
+
+	bank =  ADP5585_BANK(offset);
+	bit = ADP5585_BIT(offset);
+
+	if (value)
+		plat->dat_out[bank] |= bit;
+	else
+		plat->dat_out[bank] &= ~bit;
+
+	ret = dm_i2c_write(dev, ADP5585_GPO_DATA_OUT_A + bank, &plat->dat_out[bank], 1);
+
+	return ret;
+}
+
+static int adp5585_get_function(struct udevice *dev, unsigned int offset)
+{
+	unsigned int bank, bit, dir;
+	struct adp5585_plat *plat = dev_get_plat(dev);
+
+	bank =  ADP5585_BANK(offset);
+	bit = ADP5585_BIT(offset);
+	dir = plat->dir[bank] & bit;
+
+	if (!dir)
+		return GPIOF_INPUT;
+	else
+		return GPIOF_OUTPUT;
+}
+
+static int adp5585_xlate(struct udevice *dev, struct gpio_desc *desc,
+			 struct ofnode_phandle_args *args)
+{
+	desc->offset =  args->args[0];
+	desc->flags = args->args[1] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0;
+
+	return 0;
+}
+
+static const struct dm_gpio_ops adp5585_ops = {
+	.direction_input	= adp5585_direction_input,
+	.direction_output	= adp5585_direction_output,
+	.get_value		= adp5585_get_value,
+	.set_value		= adp5585_set_value,
+	.get_function		= adp5585_get_function,
+	.xlate			= adp5585_xlate,
+};
+
+static int adp5585_probe(struct udevice *dev)
+{
+	struct adp5585_plat *plat = dev_get_plat(dev);
+	struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+	int ret;
+
+	if (!plat)
+		return 0;
+
+	plat->addr = dev_read_addr(dev);
+	if (plat->addr == FDT_ADDR_T_NONE)
+		return -EINVAL;
+
+	ret = dm_i2c_read(dev, ADP5585_ID, &plat->id, 1);
+	if (ret < 0)
+		return ret;
+
+	uc_priv->gpio_count = ADP5585_MAXGPIO;
+	uc_priv->bank_name = "adp5585-gpio";
+
+	for (int i = 0; i < 2; i++) {
+		ret = dm_i2c_read(dev, ADP5585_GPO_DATA_OUT_A + i, &plat->dat_out[i], 1);
+		if (ret)
+			return ret;
+
+		ret = dm_i2c_read(dev, ADP5585_GPIO_DIRECTION_A + i, &plat->dir[i], 1);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static const struct udevice_id adp5585_ids[] = {
+	{ .compatible = "adp5585" },
+	{ }
+};
+
+U_BOOT_DRIVER(adp5585) = {
+	.name	= "adp5585",
+	.id	= UCLASS_GPIO,
+	.of_match	= adp5585_ids,
+	.probe	= adp5585_probe,
+	.ops	= &adp5585_ops,
+	.plat_auto	= sizeof(struct adp5585_plat),
+};