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authorAdrian Hunter <adrian.hunter@intel.com>2014-03-10 17:02:39 +0400
committerChris Ball <chris@printf.net>2014-03-17 17:11:46 +0400
commit842f4bdd37c7a0984e22aa919ad1f043137ac5c8 (patch)
tree7daefc2aac4422411ca9809ff00735db303e9df6 /drivers/mmc/core/slot-gpio.c
parent2b5cc85135279c3504c72ab51bd089d102a2f8e9 (diff)
downloadlinux-842f4bdd37c7a0984e22aa919ad1f043137ac5c8.tar.xz
mmc: slot-gpio: Record GPIO descriptors instead of GPIO numbers
In preparation for adding a descriptor-based CD GPIO API, switch from recording GPIO numbers to recording GPIO descriptors. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Tested-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Chris Ball <chris@printf.net>
Diffstat (limited to 'drivers/mmc/core/slot-gpio.c')
-rw-r--r--drivers/mmc/core/slot-gpio.c45
1 files changed, 27 insertions, 18 deletions
diff --git a/drivers/mmc/core/slot-gpio.c b/drivers/mmc/core/slot-gpio.c
index 46596b71a32f..86547a2a82c6 100644
--- a/drivers/mmc/core/slot-gpio.c
+++ b/drivers/mmc/core/slot-gpio.c
@@ -10,6 +10,7 @@
#include <linux/err.h>
#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/jiffies.h>
#include <linux/mmc/host.h>
@@ -18,8 +19,10 @@
#include <linux/slab.h>
struct mmc_gpio {
- int ro_gpio;
- int cd_gpio;
+ struct gpio_desc *ro_gpio;
+ struct gpio_desc *cd_gpio;
+ bool override_ro_active_level;
+ bool override_cd_active_level;
char *ro_label;
char cd_label[0];
};
@@ -57,8 +60,6 @@ static int mmc_gpio_alloc(struct mmc_host *host)
ctx->ro_label = ctx->cd_label + len;
snprintf(ctx->cd_label, len, "%s cd", dev_name(host->parent));
snprintf(ctx->ro_label, len, "%s ro", dev_name(host->parent));
- ctx->cd_gpio = -EINVAL;
- ctx->ro_gpio = -EINVAL;
host->slot.handler_priv = ctx;
}
}
@@ -72,11 +73,14 @@ int mmc_gpio_get_ro(struct mmc_host *host)
{
struct mmc_gpio *ctx = host->slot.handler_priv;
- if (!ctx || !gpio_is_valid(ctx->ro_gpio))
+ if (!ctx || !ctx->ro_gpio)
return -ENOSYS;
- return !gpio_get_value_cansleep(ctx->ro_gpio) ^
- !!(host->caps2 & MMC_CAP2_RO_ACTIVE_HIGH);
+ if (ctx->override_ro_active_level)
+ return !gpiod_get_raw_value_cansleep(ctx->ro_gpio) ^
+ !!(host->caps2 & MMC_CAP2_RO_ACTIVE_HIGH);
+
+ return gpiod_get_value_cansleep(ctx->ro_gpio);
}
EXPORT_SYMBOL(mmc_gpio_get_ro);
@@ -84,11 +88,14 @@ int mmc_gpio_get_cd(struct mmc_host *host)
{
struct mmc_gpio *ctx = host->slot.handler_priv;
- if (!ctx || !gpio_is_valid(ctx->cd_gpio))
+ if (!ctx || !ctx->cd_gpio)
return -ENOSYS;
- return !gpio_get_value_cansleep(ctx->cd_gpio) ^
- !!(host->caps2 & MMC_CAP2_CD_ACTIVE_HIGH);
+ if (ctx->override_cd_active_level)
+ return !gpiod_get_raw_value_cansleep(ctx->cd_gpio) ^
+ !!(host->caps2 & MMC_CAP2_CD_ACTIVE_HIGH);
+
+ return gpiod_get_value_cansleep(ctx->cd_gpio);
}
EXPORT_SYMBOL(mmc_gpio_get_cd);
@@ -125,7 +132,8 @@ int mmc_gpio_request_ro(struct mmc_host *host, unsigned int gpio)
if (ret < 0)
return ret;
- ctx->ro_gpio = gpio;
+ ctx->override_ro_active_level = true;
+ ctx->ro_gpio = gpio_to_desc(gpio);
return 0;
}
@@ -201,7 +209,8 @@ int mmc_gpio_request_cd(struct mmc_host *host, unsigned int gpio,
if (irq < 0)
host->caps |= MMC_CAP_NEEDS_POLL;
- ctx->cd_gpio = gpio;
+ ctx->override_cd_active_level = true;
+ ctx->cd_gpio = gpio_to_desc(gpio);
return 0;
}
@@ -219,11 +228,11 @@ void mmc_gpio_free_ro(struct mmc_host *host)
struct mmc_gpio *ctx = host->slot.handler_priv;
int gpio;
- if (!ctx || !gpio_is_valid(ctx->ro_gpio))
+ if (!ctx || !ctx->ro_gpio)
return;
- gpio = ctx->ro_gpio;
- ctx->ro_gpio = -EINVAL;
+ gpio = desc_to_gpio(ctx->ro_gpio);
+ ctx->ro_gpio = NULL;
devm_gpio_free(&host->class_dev, gpio);
}
@@ -241,7 +250,7 @@ void mmc_gpio_free_cd(struct mmc_host *host)
struct mmc_gpio *ctx = host->slot.handler_priv;
int gpio;
- if (!ctx || !gpio_is_valid(ctx->cd_gpio))
+ if (!ctx || !ctx->cd_gpio)
return;
if (host->slot.cd_irq >= 0) {
@@ -249,8 +258,8 @@ void mmc_gpio_free_cd(struct mmc_host *host)
host->slot.cd_irq = -EINVAL;
}
- gpio = ctx->cd_gpio;
- ctx->cd_gpio = -EINVAL;
+ gpio = desc_to_gpio(ctx->cd_gpio);
+ ctx->cd_gpio = NULL;
devm_gpio_free(&host->class_dev, gpio);
}