diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2025-02-13 21:48:50 +0200 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2025-02-21 09:42:45 +0100 |
| commit | db305161880a024a43f4b1cbafa7a294793d7a9e (patch) | |
| tree | b3cf686992e5e72540ac5f14b516d91d25582f54 /drivers/gpio/gpio-regmap.c | |
| parent | a630d3960b6ac3c37cb0789605056e8845ffbf16 (diff) | |
gpio: regmap: Allow ngpio to be read from the property
GPIOLIB supports the case when number of supported GPIOs can be read
from the device property. Enable this for drivers that are using
GPIO regmap layer.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Michael Walle <mwalle@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Reviewed-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Link: https://lore.kernel.org/r/20250213195621.3133406-6-andriy.shevchenko@linux.intel.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-regmap.c')
| -rw-r--r-- | drivers/gpio/gpio-regmap.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/gpio/gpio-regmap.c b/drivers/gpio/gpio-regmap.c index 41ee576e7cd09..856f8569566e0 100644 --- a/drivers/gpio/gpio-regmap.c +++ b/drivers/gpio/gpio-regmap.c @@ -17,6 +17,8 @@ #include <linux/gpio/driver.h> #include <linux/gpio/regmap.h> +#include "gpiolib.h" + struct gpio_regmap { struct device *parent; struct regmap *regmap; @@ -210,9 +212,6 @@ struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config if (!config->parent) return ERR_PTR(-EINVAL); - if (!config->ngpio) - return ERR_PTR(-EINVAL); - /* we need at least one */ if (!config->reg_dat_base && !config->reg_set_base) return ERR_PTR(-EINVAL); @@ -243,7 +242,6 @@ struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config chip->parent = config->parent; chip->fwnode = config->fwnode; chip->base = -1; - chip->ngpio = config->ngpio; chip->names = config->names; chip->label = config->label ?: dev_name(config->parent); chip->can_sleep = regmap_might_sleep(config->regmap); @@ -262,6 +260,13 @@ struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config chip->direction_output = gpio_regmap_direction_output; } + chip->ngpio = config->ngpio; + if (!chip->ngpio) { + ret = gpiochip_get_ngpios(chip, chip->parent); + if (ret) + return ERR_PTR(ret); + } + /* if not set, assume there is only one register */ gpio->ngpio_per_reg = config->ngpio_per_reg; if (!gpio->ngpio_per_reg) |