diff options
Diffstat (limited to 'drivers/mmc/core/slot-gpio.c')
-rw-r--r-- | drivers/mmc/core/slot-gpio.c | 70 |
1 files changed, 61 insertions, 9 deletions
diff --git a/drivers/mmc/core/slot-gpio.c b/drivers/mmc/core/slot-gpio.c index 5f89cb83d5f0..69bbf2adb329 100644 --- a/drivers/mmc/core/slot-gpio.c +++ b/drivers/mmc/core/slot-gpio.c @@ -221,8 +221,6 @@ int mmc_gpio_request_cd(struct mmc_host *host, unsigned int gpio, ctx->override_cd_active_level = true; ctx->cd_gpio = gpio_to_desc(gpio); - mmc_gpiod_request_cd_irq(host); - return 0; } EXPORT_SYMBOL(mmc_gpio_request_cd); @@ -283,6 +281,8 @@ EXPORT_SYMBOL(mmc_gpio_free_cd); * @idx: index of the GPIO to obtain in the consumer * @override_active_level: ignore %GPIO_ACTIVE_LOW flag * @debounce: debounce time in microseconds + * @gpio_invert: will return whether the GPIO line is inverted or not, set + * to NULL to ignore * * Use this function in place of mmc_gpio_request_cd() to use the GPIO * descriptor API. Note that it is paired with mmc_gpiod_free_cd() not @@ -293,7 +293,7 @@ EXPORT_SYMBOL(mmc_gpio_free_cd); */ int mmc_gpiod_request_cd(struct mmc_host *host, const char *con_id, unsigned int idx, bool override_active_level, - unsigned int debounce) + unsigned int debounce, bool *gpio_invert) { struct mmc_gpio *ctx; struct gpio_desc *desc; @@ -308,20 +308,19 @@ int mmc_gpiod_request_cd(struct mmc_host *host, const char *con_id, if (!con_id) con_id = ctx->cd_label; - desc = devm_gpiod_get_index(host->parent, con_id, idx); + desc = devm_gpiod_get_index(host->parent, con_id, idx, GPIOD_IN); if (IS_ERR(desc)) return PTR_ERR(desc); - ret = gpiod_direction_input(desc); - if (ret < 0) - return ret; - if (debounce) { ret = gpiod_set_debounce(desc, debounce); if (ret < 0) return ret; } + if (gpio_invert) + *gpio_invert = !gpiod_is_active_low(desc); + ctx->override_cd_active_level = override_active_level; ctx->cd_gpio = desc; @@ -330,6 +329,59 @@ int mmc_gpiod_request_cd(struct mmc_host *host, const char *con_id, EXPORT_SYMBOL(mmc_gpiod_request_cd); /** + * mmc_gpiod_request_ro - request a gpio descriptor for write protection + * @host: mmc host + * @con_id: function within the GPIO consumer + * @idx: index of the GPIO to obtain in the consumer + * @override_active_level: ignore %GPIO_ACTIVE_LOW flag + * @debounce: debounce time in microseconds + * @gpio_invert: will return whether the GPIO line is inverted or not, + * set to NULL to ignore + * + * Use this function in place of mmc_gpio_request_ro() to use the GPIO + * descriptor API. Note that it is paired with mmc_gpiod_free_ro() not + * mmc_gpio_free_ro(). + * + * Returns zero on success, else an error. + */ +int mmc_gpiod_request_ro(struct mmc_host *host, const char *con_id, + unsigned int idx, bool override_active_level, + unsigned int debounce, bool *gpio_invert) +{ + struct mmc_gpio *ctx; + struct gpio_desc *desc; + int ret; + + ret = mmc_gpio_alloc(host); + if (ret < 0) + return ret; + + ctx = host->slot.handler_priv; + + if (!con_id) + con_id = ctx->ro_label; + + desc = devm_gpiod_get_index(host->parent, con_id, idx, GPIOD_IN); + if (IS_ERR(desc)) + return PTR_ERR(desc); + + if (debounce) { + ret = gpiod_set_debounce(desc, debounce); + if (ret < 0) + return ret; + } + + if (gpio_invert) + *gpio_invert = !gpiod_is_active_low(desc); + + ctx->override_ro_active_level = override_active_level; + ctx->ro_gpio = desc; + + return 0; +} +EXPORT_SYMBOL(mmc_gpiod_request_ro); + +/** * mmc_gpiod_free_cd - free the card-detection gpio descriptor * @host: mmc host * @@ -348,7 +400,7 @@ void mmc_gpiod_free_cd(struct mmc_host *host) host->slot.cd_irq = -EINVAL; } - devm_gpiod_put(&host->class_dev, ctx->cd_gpio); + devm_gpiod_put(host->parent, ctx->cd_gpio); ctx->cd_gpio = NULL; } |