diff options
| author | Shubhrajyoti Datta <shubhrajyoti.datta@amd.com> | 2022-10-26 17:15:43 +0200 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2022-10-27 09:32:31 +0200 |
| commit | fbb19fe17eaef7b6ba2e68dbf0600a97060f2909 (patch) | |
| tree | 7cc5f41bae34de50bc114d732be4f10390e5f3d5 /drivers/gpio | |
| parent | gpio: pca9570: add a platform data structure (diff) | |
| download | linux-fbb19fe17eaef7b6ba2e68dbf0600a97060f2909.tar.xz linux-fbb19fe17eaef7b6ba2e68dbf0600a97060f2909.zip | |
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: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@amd.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-pca9570.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-pca9570.c b/drivers/gpio/gpio-pca9570.c index e8c2ddb1bcd8..6c07a8811a7a 100644 --- a/drivers/gpio/gpio-pca9570.c +++ b/drivers/gpio/gpio-pca9570.c @@ -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; - ret = i2c_smbus_read_byte(client); + 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 */ } |