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path: root/drivers/mmc/core/slot-gpio.c
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Diffstat (limited to 'drivers/mmc/core/slot-gpio.c')
-rw-r--r--drivers/mmc/core/slot-gpio.c70
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;
}