diff options
| author | Yu-Chun Lin <eleanor.lin@realtek.com> | 2026-07-26 20:51:57 +0800 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> | 2026-07-30 11:05:07 +0200 |
| commit | 5f28e3dbd23199c778f5339c0d4488820435f6d5 (patch) | |
| tree | 076a39d2b5a051ef7f8846f959bae9d290ddf394 /drivers/gpio | |
| parent | 6c53312b7e2d9a972e509f5bac002e169e241eca (diff) | |
| download | linux-next-5f28e3dbd23199c778f5339c0d4488820435f6d5.tar.gz linux-next-5f28e3dbd23199c778f5339c0d4488820435f6d5.zip | |
gpio: regmap: Add value_xlate callback
Introduce a new optional 'value_xlate' callback. This routine allows drivers
to translate or modify the register value and mask immediately before a write
operation. It is particularly useful for hardware that requires additional
control bits, such as a write-enable bit, to be appended to the data
dynamically.
Reviewed-by: Michael Walle <mwalle@kernel.org>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Suggested-by: Michael Walle <mwalle@kernel.org>
Signed-off-by: Yu-Chun Lin <eleanor.lin@realtek.com>
Link: https://patch.msgid.link/20260726125209.140307-7-eleanor.lin@realtek.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-regmap.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-regmap.c b/drivers/gpio/gpio-regmap.c index ceab805d053c..cff7db8036f7 100644 --- a/drivers/gpio/gpio-regmap.c +++ b/drivers/gpio/gpio-regmap.c @@ -45,6 +45,12 @@ struct gpio_regmap { unsigned int base, unsigned int offset, unsigned int *reg, unsigned int *mask); + int (*value_xlate)(struct gpio_regmap *gpio, + enum gpio_regmap_operation op, + unsigned int base, unsigned int offset, + unsigned int reg, unsigned int *mask, + unsigned int *val); + void *driver_data; }; @@ -114,6 +120,13 @@ static int gpio_regmap_set(struct gpio_chip *chip, unsigned int offset, else mask_val = 0; + if (gpio->value_xlate) { + ret = gpio->value_xlate(gpio, GPIO_REGMAP_SET_OP, base, offset, + reg, &mask, &mask_val); + if (ret) + return ret; + } + /* ignore input values which shadow the old output value */ if (gpio->reg_dat_base == gpio->reg_set_base) ret = regmap_write_bits(gpio->regmap, reg, mask, mask_val); @@ -127,7 +140,7 @@ static int gpio_regmap_set_with_clear(struct gpio_chip *chip, unsigned int offset, int val) { struct gpio_regmap *gpio = gpiochip_get_data(chip); - unsigned int base, reg, mask; + unsigned int base, reg, mask, value = 0; int ret; if (val) @@ -139,6 +152,13 @@ static int gpio_regmap_set_with_clear(struct gpio_chip *chip, if (ret) return ret; + if (gpio->value_xlate) { + ret = gpio->value_xlate(gpio, GPIO_REGMAP_SET_OP, base, offset, + reg, &mask, &value); + if (ret) + return ret; + } + return regmap_write(gpio->regmap, reg, mask); } @@ -248,6 +268,13 @@ static int gpio_regmap_set_direction(struct gpio_chip *chip, else val = output ? mask : 0; + if (gpio->value_xlate) { + ret = gpio->value_xlate(gpio, GPIO_REGMAP_SET_DIR_OP, base, offset, + reg, &mask, &val); + if (ret) + return ret; + } + return regmap_update_bits(gpio->regmap, reg, mask, val); } @@ -415,6 +442,8 @@ struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config if (!gpio->reg_mask_xlate) gpio->reg_mask_xlate = gpio_regmap_simple_xlate; + gpio->value_xlate = config->value_xlate; + ret = gpiochip_add_data(chip, gpio); if (ret < 0) goto err_free_bitmap_output; |