Commit fbb19fe1 authored by Shubhrajyoti Datta's avatar Shubhrajyoti Datta Committed by Bartosz Golaszewski
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gpio: pca9570: add slg7xl45106 support 



Dialog semiconductors SLG7XL45106 is an 8-bit I2C GPO expander.
The output port is controlled by a data byte with register
address. Add a compatible string for the same. Also update
the driver to write and read from it.

Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarShubhrajyoti Datta <shubhrajyoti.datta@amd.com>
Signed-off-by: default avatarBartosz Golaszewski <bartosz.golaszewski@linaro.org>
parent b8a34582

drivers/gpio/gpio-pca9570.c

+17 −1
Original line number Diff line number Diff line
@@ -15,6 +15,8 @@ 
#include <linux/mutex.h>

#include <linux/property.h>



#define SLG7XL45106_GPO_REG	0xDB



/**

 * struct pca9570_platform_data - GPIO platformdata

 * @ngpio: no of gpios
@@ -44,7 +46,11 @@ static int pca9570_read(struct pca9570 *gpio, u8 *value) 
	struct i2c_client *client = to_i2c_client(gpio->chip.parent);

	int ret;



	if (gpio->p_data->command != 0)

		ret = i2c_smbus_read_byte_data(client, gpio->p_data->command);

	else

		ret = i2c_smbus_read_byte(client);



	if (ret < 0)

		return ret;
@@ -56,6 +62,9 @@ static int pca9570_write(struct pca9570 *gpio, u8 value) 
{

	struct i2c_client *client = to_i2c_client(gpio->chip.parent);



	if (gpio->p_data->command != 0)

		return i2c_smbus_write_byte_data(client, gpio->p_data->command, value);



	return i2c_smbus_write_byte(client, value);

}
@@ -140,14 +149,21 @@ static const struct pca9570_platform_data pca9571_gpio = { 
	.ngpio = 8,

};



static const struct pca9570_platform_data slg7xl45106_gpio = {

	.ngpio = 8,

	.command = SLG7XL45106_GPO_REG,

};



static const struct i2c_device_id pca9570_id_table[] = {

	{ "pca9570", (kernel_ulong_t)&pca9570_gpio},

	{ "pca9571", (kernel_ulong_t)&pca9571_gpio },

	{ "slg7xl45106", (kernel_ulong_t)&slg7xl45106_gpio },

	{ /* sentinel */ }

};

MODULE_DEVICE_TABLE(i2c, pca9570_id_table);



static const struct of_device_id pca9570_of_match_table[] = {

	{ .compatible = "dlg,slg7xl45106", .data = &slg7xl45106_gpio},

	{ .compatible = "nxp,pca9570", .data = &pca9570_gpio },

	{ .compatible = "nxp,pca9571", .data = &pca9571_gpio },

	{ /* sentinel */ }