Commit ca6af7b9 authored by Laxman Dewangan's avatar Laxman Dewangan Committed by Linus Walleij
Browse files

gpio: palmas: add support for TPS80036 



TI Palmas series device TPS80036 supports 16 GPIOs.
Register its all 16 gpios when this device is selected.

Signed-off-by: default avatarLaxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 7b17b59f

drivers/gpio/gpio-palmas.c

+69 −35
Original line number Diff line number Diff line
@@ -31,6 +31,10 @@ struct palmas_gpio { 
	struct palmas *palmas;

};



struct palmas_device_data {

	int ngpio;

};



static inline struct palmas_gpio *to_palmas_gpio(struct gpio_chip *chip)

{

	return container_of(chip, struct palmas_gpio, gpio_chip);
@@ -42,23 +46,26 @@ static int palmas_gpio_get(struct gpio_chip *gc, unsigned offset) 
	struct palmas *palmas = pg->palmas;

	unsigned int val;

	int ret;

	unsigned int reg;

	int gpio16 = (offset/8);



	offset %= 8;

	reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR;



	ret = palmas_read(palmas, PALMAS_GPIO_BASE, PALMAS_GPIO_DATA_DIR, &val);

	ret = palmas_read(palmas, PALMAS_GPIO_BASE, reg, &val);

	if (ret < 0) {

		dev_err(gc->dev, "GPIO_DATA_DIR read failed, err = %d\n", ret);

		dev_err(gc->dev, "Reg 0x%02x read failed, %d\n", reg, ret);

		return ret;

	}



	if (val & (1 << offset)) {

		ret = palmas_read(palmas, PALMAS_GPIO_BASE,

				  PALMAS_GPIO_DATA_OUT, &val);

	} else {

		ret = palmas_read(palmas, PALMAS_GPIO_BASE,

				  PALMAS_GPIO_DATA_IN, &val);

	}

	if (val & BIT(offset))

		reg = (gpio16) ? PALMAS_GPIO_DATA_OUT2 : PALMAS_GPIO_DATA_OUT;

	else

		reg = (gpio16) ? PALMAS_GPIO_DATA_IN2 : PALMAS_GPIO_DATA_IN;



	ret = palmas_read(palmas, PALMAS_GPIO_BASE, reg, &val);

	if (ret < 0) {

		dev_err(gc->dev, "GPIO_DATA_IN/OUT read failed, err = %d\n",

			ret);

		dev_err(gc->dev, "Reg 0x%02x read failed, %d\n", reg, ret);

		return ret;

	}

	return !!(val & BIT(offset));
@@ -70,17 +77,20 @@ static void palmas_gpio_set(struct gpio_chip *gc, unsigned offset, 
	struct palmas_gpio *pg = to_palmas_gpio(gc);

	struct palmas *palmas = pg->palmas;

	int ret;

	unsigned int reg;

	int gpio16 = (offset/8);



	if (value)

		ret = palmas_write(palmas, PALMAS_GPIO_BASE,

				PALMAS_GPIO_SET_DATA_OUT, BIT(offset));

	offset %= 8;

	if (gpio16)

		reg = (value) ?

			PALMAS_GPIO_SET_DATA_OUT2 : PALMAS_GPIO_CLEAR_DATA_OUT2;

	else

		ret = palmas_write(palmas, PALMAS_GPIO_BASE,

				PALMAS_GPIO_CLEAR_DATA_OUT, BIT(offset));

		reg = (value) ?

			PALMAS_GPIO_SET_DATA_OUT : PALMAS_GPIO_CLEAR_DATA_OUT;



	ret = palmas_write(palmas, PALMAS_GPIO_BASE, reg, BIT(offset));

	if (ret < 0)

		dev_err(gc->dev, "%s write failed, err = %d\n",

			(value) ? "GPIO_SET_DATA_OUT" : "GPIO_CLEAR_DATA_OUT",

			ret);

		dev_err(gc->dev, "Reg 0x%02x write failed, %d\n", reg, ret);

}



static int palmas_gpio_output(struct gpio_chip *gc, unsigned offset,
@@ -89,14 +99,19 @@ static int palmas_gpio_output(struct gpio_chip *gc, unsigned offset, 
	struct palmas_gpio *pg = to_palmas_gpio(gc);

	struct palmas *palmas = pg->palmas;

	int ret;

	unsigned int reg;

	int gpio16 = (offset/8);



	offset %= 8;

	reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR;



	/* Set the initial value */

	palmas_gpio_set(gc, offset, value);



	ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE,

		PALMAS_GPIO_DATA_DIR, BIT(offset), BIT(offset));

	ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, reg,

				BIT(offset), BIT(offset));

	if (ret < 0)

		dev_err(gc->dev, "GPIO_DATA_DIR write failed, err = %d\n", ret);

		dev_err(gc->dev, "Reg 0x%02x update failed, %d\n", reg, ret);

	return ret;

}
@@ -105,11 +120,15 @@ static int palmas_gpio_input(struct gpio_chip *gc, unsigned offset) 
	struct palmas_gpio *pg = to_palmas_gpio(gc);

	struct palmas *palmas = pg->palmas;

	int ret;

	unsigned int reg;

	int gpio16 = (offset/8);



	offset %= 8;

	reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR;



	ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE,

		PALMAS_GPIO_DATA_DIR, BIT(offset), 0);

	ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, reg, BIT(offset), 0);

	if (ret < 0)

		dev_err(gc->dev, "GPIO_DATA_DIR write failed, err = %d\n", ret);

		dev_err(gc->dev, "Reg 0x%02x update failed, %d\n", reg, ret);

	return ret;

}
@@ -121,12 +140,36 @@ static int palmas_gpio_to_irq(struct gpio_chip *gc, unsigned offset) 
	return palmas_irq_get_virq(palmas, PALMAS_GPIO_0_IRQ + offset);

}



static const struct palmas_device_data palmas_dev_data = {

	.ngpio = 8,

};



static const struct palmas_device_data tps80036_dev_data = {

	.ngpio = 16,

};



static struct of_device_id of_palmas_gpio_match[] = {

	{ .compatible = "ti,palmas-gpio", .data = &palmas_dev_data,},

	{ .compatible = "ti,tps65913-gpio", .data = &palmas_dev_data,},

	{ .compatible = "ti,tps65914-gpio", .data = &palmas_dev_data,},

	{ .compatible = "ti,tps80036-gpio", .data = &tps80036_dev_data,},

	{ },

};

MODULE_DEVICE_TABLE(of, of_palmas_gpio_match);



static int palmas_gpio_probe(struct platform_device *pdev)

{

	struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);

	struct palmas_platform_data *palmas_pdata;

	struct palmas_gpio *palmas_gpio;

	int ret;

	const struct of_device_id *match;

	const struct palmas_device_data *dev_data;



	match = of_match_device(of_palmas_gpio_match, &pdev->dev);

	dev_data = match->data;

	if (!dev_data)

		dev_data = &palmas_dev_data;



	palmas_gpio = devm_kzalloc(&pdev->dev,

				sizeof(*palmas_gpio), GFP_KERNEL);
@@ -138,7 +181,7 @@ static int palmas_gpio_probe(struct platform_device *pdev) 
	palmas_gpio->palmas = palmas;

	palmas_gpio->gpio_chip.owner = THIS_MODULE;

	palmas_gpio->gpio_chip.label = dev_name(&pdev->dev);

	palmas_gpio->gpio_chip.ngpio = 8;

	palmas_gpio->gpio_chip.ngpio = dev_data->ngpio;

	palmas_gpio->gpio_chip.can_sleep = 1;

	palmas_gpio->gpio_chip.direction_input = palmas_gpio_input;

	palmas_gpio->gpio_chip.direction_output = palmas_gpio_output;
@@ -172,15 +215,6 @@ static int palmas_gpio_remove(struct platform_device *pdev) 
	return gpiochip_remove(&palmas_gpio->gpio_chip);

}



static struct of_device_id of_palmas_gpio_match[] = {

	{ .compatible = "ti,palmas-gpio"},

	{ .compatible = "ti,tps65913-gpio"},

	{ .compatible = "ti,tps65914-gpio"},

	{ .compatible = "ti,tps80036-gpio"},

	{ },

};

MODULE_DEVICE_TABLE(of, of_palmas_gpio_match);



static struct platform_driver palmas_gpio_driver = {

	.driver.name	= "palmas-gpio",

	.driver.owner	= THIS_MODULE,