[PATCH V4 1/1] mmc: sdhci-s3c: Use mmc_gpio_request_cd function

[Beomho Seo <beomho.seo@samsung.com>]

Hi Chris and Ulf,

Thank you for review. I fixed patch for your review.

---
This patch use mmc_gpio_request_cd function.

Signed-off-by: Beomho Seo <beomho.seo@samsung.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
---
Changes in v4:
- Remove unused variable "ext_cd_irq".
- Remove mmc_gpio_free_cd function.

Changes in v3:
- Rebased to recent mmc-next branch.

Changes in v2:
- Fix "err_req_cd:".
- Remove mmc_gpio_free_cd() and then, used sdhci_remove_host().
---
 drivers/mmc/host/sdhci-s3c.c |   56 +++++++++---------------------------------
 1 file changed, 12 insertions(+), 44 deletions(-)

diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
index c12301e..9c76113 100644
--- a/drivers/mmc/host/sdhci-s3c.c
+++ b/drivers/mmc/host/sdhci-s3c.c
@@ -27,6 +27,7 @@
 #include <linux/pm_runtime.h>

 #include <linux/mmc/host.h>
+#include <linux/mmc/slot-gpio.h>

 #include "sdhci-s3c-regs.h"
 #include "sdhci.h"
@@ -49,7 +50,6 @@ struct sdhci_s3c {
 	struct resource		*ioarea;
 	struct s3c_sdhci_platdata *pdata;
 	int			cur_clk;
-	int			ext_cd_irq;
 	int			ext_cd_gpio;

 	struct clk		*clk_io;
@@ -396,44 +396,6 @@ static void sdhci_s3c_notify_change(struct platform_device *dev, int state)
 	}
 }

-static irqreturn_t sdhci_s3c_gpio_card_detect_thread(int irq, void *dev_id)
-{
-	struct sdhci_s3c *sc = dev_id;
-	int status = gpio_get_value(sc->ext_cd_gpio);
-	if (sc->pdata->ext_cd_gpio_invert)
-		status = !status;
-	sdhci_s3c_notify_change(sc->pdev, status);
-	return IRQ_HANDLED;
-}
-
-static void sdhci_s3c_setup_card_detect_gpio(struct sdhci_s3c *sc)
-{
-	struct s3c_sdhci_platdata *pdata = sc->pdata;
-	struct device *dev = &sc->pdev->dev;
-
-	if (devm_gpio_request(dev, pdata->ext_cd_gpio, "SDHCI EXT CD") == 0) {
-		sc->ext_cd_gpio = pdata->ext_cd_gpio;
-		sc->ext_cd_irq = gpio_to_irq(pdata->ext_cd_gpio);
-		if (sc->ext_cd_irq &&
-		    request_threaded_irq(sc->ext_cd_irq, NULL,
-					 sdhci_s3c_gpio_card_detect_thread,
-					 IRQF_TRIGGER_RISING |
-					 IRQF_TRIGGER_FALLING |
-					 IRQF_ONESHOT,
-					 dev_name(dev), sc) == 0) {
-			int status = gpio_get_value(sc->ext_cd_gpio);
-			if (pdata->ext_cd_gpio_invert)
-				status = !status;
-			sdhci_s3c_notify_change(sc->pdev, status);
-		} else {
-			dev_warn(dev, "cannot request irq for card detect\n");
-			sc->ext_cd_irq = 0;
-		}
-	} else {
-		dev_err(dev, "cannot request gpio for card detect\n");
-	}
-}
-
 #ifdef CONFIG_OF
 static int sdhci_s3c_parse_dt(struct device *dev,
 		struct sdhci_host *host, struct s3c_sdhci_platdata *pdata)
@@ -685,8 +647,14 @@ static int sdhci_s3c_probe(struct platform_device *pdev)
 	if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_init)
 		pdata->ext_cd_init(&sdhci_s3c_notify_change);
 	if (pdata->cd_type == S3C_SDHCI_CD_GPIO &&
-	    gpio_is_valid(pdata->ext_cd_gpio))
-		sdhci_s3c_setup_card_detect_gpio(sc);
+	    gpio_is_valid(pdata->ext_cd_gpio)) {
+		ret = mmc_gpio_request_cd(host->mmc, pdata->ext_cd_gpio, 0);
+		if (ret) {
+			dev_err(dev,
+				"failed to reqeust card detect gpio\n");
+			goto err_req_cd;
+		}
+	}

 #ifdef CONFIG_PM_RUNTIME
 	if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL)
@@ -694,6 +662,9 @@ static int sdhci_s3c_probe(struct platform_device *pdev)
 #endif
 	return 0;

+ err_req_cd:
+	sdhci_remove_host(host, 1);
+
  err_req_regs:
  err_no_busclks:
 	clk_disable_unprepare(sc->clk_io);
@@ -713,9 +684,6 @@ static int sdhci_s3c_remove(struct platform_device *pdev)
 	if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_cleanup)
 		pdata->ext_cd_cleanup(&sdhci_s3c_notify_change);

-	if (sc->ext_cd_irq)
-		free_irq(sc->ext_cd_irq, sc);
-
 #ifdef CONFIG_PM_RUNTIME
 	if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL)
 		clk_prepare_enable(sc->clk_io);
-- 
1.7.9.5