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>

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);
 }