[PATCH v2] mmc: dwmmc: let device core setup the default pin configuration

[Thomas Abraham]

With device core now able to setup the default pin configuration,
the pin configuration code based on the deprecated Samsung specific
gpio bindings is removed.

Signed-off-by: Thomas Abraham <thomas.abraham at linaro.org>
Acked-by: Linus Walleij <linus.walleij at linaro.org>
Reviewed-by: Doug Anderson <dianders at chromium.org>
Tested-by: Doug Anderson <dianders at chromium.org>
---

Hi Doug, Seungwon,

I apologize for the delaying in following up on the review comment.
The setup_bus callback support has been removed in this patch. I did
intend to retain the support for setup_bus callback in the previous
version of this patch since any new platform that might use this
driver and need such a callback would have this callback ready for
use. But it seems removing the setup_bus callback is preferred, so
I am fine with it.

Thomas.

 drivers/mmc/host/dw_mmc-exynos.c |   38 --------------------------------------
 drivers/mmc/host/dw_mmc.c        |   14 +-------------
 drivers/mmc/host/dw_mmc.h        |    3 ---
 3 files changed, 1 insertions(+), 54 deletions(-)

diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
index 72fd0f2..467d043 100644
--- a/drivers/mmc/host/dw_mmc-exynos.c
+++ b/drivers/mmc/host/dw_mmc-exynos.c
@@ -152,43 +152,6 @@ static int dw_mci_exynos_parse_dt(struct dw_mci *host)
 	return 0;
 }
 
-static int dw_mci_exynos_setup_bus(struct dw_mci *host,
-				struct device_node *slot_np, u8 bus_width)
-{
-	int idx, gpio, ret;
-
-	if (!slot_np)
-		return -EINVAL;
-
-	/* cmd + clock + bus-width pins */
-	for (idx = 0; idx < NUM_PINS(bus_width); idx++) {
-		gpio = of_get_gpio(slot_np, idx);
-		if (!gpio_is_valid(gpio)) {
-			dev_err(host->dev, "invalid gpio: %d\n", gpio);
-			return -EINVAL;
-		}
-
-		ret = devm_gpio_request(host->dev, gpio, "dw-mci-bus");
-		if (ret) {
-			dev_err(host->dev, "gpio [%d] request failed\n", gpio);
-			return -EBUSY;
-		}
-	}
-
-	if (host->pdata->quirks & DW_MCI_QUIRK_BROKEN_CARD_DETECTION)
-		return 0;
-
-	gpio = of_get_named_gpio(slot_np, "samsung,cd-pinmux-gpio", 0);
-	if (gpio_is_valid(gpio)) {
-		if (devm_gpio_request(host->dev, gpio, "dw-mci-cd"))
-			dev_err(host->dev, "gpio [%d] request failed\n", gpio);
-	} else {
-		dev_info(host->dev, "cd gpio not available");
-	}
-
-	return 0;
-}
-
 /* Exynos5250 controller specific capabilities */
 static unsigned long exynos5250_dwmmc_caps[4] = {
 	MMC_CAP_UHS_DDR50 | MMC_CAP_1_8V_DDR |
@@ -205,7 +168,6 @@ static const struct dw_mci_drv_data exynos5250_drv_data = {
 	.prepare_command	= dw_mci_exynos_prepare_command,
 	.set_ios		= dw_mci_exynos_set_ios,
 	.parse_dt		= dw_mci_exynos_parse_dt,
-	.setup_bus		= dw_mci_exynos_setup_bus,
 };
 
 static const struct of_device_id dw_mci_exynos_match[] = {
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 9834221..adb1b7d 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1878,7 +1878,7 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 	struct mmc_host *mmc;
 	struct dw_mci_slot *slot;
 	const struct dw_mci_drv_data *drv_data = host->drv_data;
-	int ctrl_id, ret;
+	int ctrl_id;
 	u8 bus_width;
 
 	mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), host->dev);
@@ -1935,14 +1935,6 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 	else
 		bus_width = 1;
 
-	if (drv_data && drv_data->setup_bus) {
-		struct device_node *slot_np;
-		slot_np = dw_mci_of_find_slot_node(host->dev, slot->id);
-		ret = drv_data->setup_bus(host, slot_np, bus_width);
-		if (ret)
-			goto err_setup_bus;
-	}
-
 	switch (bus_width) {
 	case 8:
 		mmc->caps |= MMC_CAP_8_BIT_DATA;
@@ -2006,10 +1998,6 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 	queue_work(host->card_workqueue, &host->card_work);
 
 	return 0;
-
-err_setup_bus:
-	mmc_free_host(mmc);
-	return -EINVAL;
 }
 
 static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id)
diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
index 53b8fd9..0b74189 100644
--- a/drivers/mmc/host/dw_mmc.h
+++ b/drivers/mmc/host/dw_mmc.h
@@ -190,7 +190,6 @@ extern int dw_mci_resume(struct dw_mci *host);
  * @prepare_command: handle CMD register extensions.
  * @set_ios: handle bus specific extensions.
  * @parse_dt: parse implementation specific device tree properties.
- * @setup_bus: initialize io-interface
  *
  * Provide controller implementation specific extensions. The usage of this
  * data structure is fully optional and usage of each member in this structure
@@ -203,7 +202,5 @@ struct dw_mci_drv_data {
 	void		(*prepare_command)(struct dw_mci *host, u32 *cmdr);
 	void		(*set_ios)(struct dw_mci *host, struct mmc_ios *ios);
 	int		(*parse_dt)(struct dw_mci *host);
-	int		(*setup_bus)(struct dw_mci *host,
-				struct device_node *slot_np, u8 bus_width);
 };
 #endif /* _DW_MMC_H_ */
-- 
1.6.6.rc2