[U-Boot] [PATCH v3 4/4] mmc: tegra2: Implement card-detect hook.

[Thierry Reding]

On Tegra2, card-detection is implemented by passing the card-detection
GPIOs to the MMC driver at initialization time. Instead of implementing
the board_mmc_getcd() function, use the card-detect hook and allow
boards to override it by providing their own board_mmc_getcd()
implementation.

Signed-off-by: Thierry Reding <thierry.reding at avionic-design.de>
---
 drivers/mmc/tegra2_mmc.c |   28 +++++++++++++---------------
 1 files changed, 13 insertions(+), 15 deletions(-)

diff --git a/drivers/mmc/tegra2_mmc.c b/drivers/mmc/tegra2_mmc.c
index fe562ed..5b4c9f6 100644
--- a/drivers/mmc/tegra2_mmc.c
+++ b/drivers/mmc/tegra2_mmc.c
@@ -474,6 +474,18 @@ static int mmc_core_init(struct mmc *mmc)
 	return 0;
 }
 
+int tegra2_mmc_getcd(struct mmc *mmc)
+{
+	struct mmc_host *host = (struct mmc_host *)mmc->priv;
+
+	debug("tegra2_mmc_getcd called\n");
+
+	if (host->cd_gpio >= 0)
+		return !gpio_get_value(host->cd_gpio);
+
+	return 1;
+}
+
 int tegra2_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio)
 {
 	struct mmc_host *host;
@@ -512,6 +524,7 @@ int tegra2_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio)
 	mmc->send_cmd = mmc_send_cmd;
 	mmc->set_ios = mmc_set_ios;
 	mmc->init = mmc_core_init;
+	mmc->getcd = tegra2_mmc_getcd;
 
 	mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
 	if (bus_width == 8)
@@ -535,18 +548,3 @@ int tegra2_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio)
 
 	return 0;
 }
-
-/* this is a weak define that we are overriding */
-int board_mmc_getcd(u8 *cd, struct mmc *mmc)
-{
-	struct mmc_host *host = (struct mmc_host *)mmc->priv;
-
-	debug("board_mmc_getcd called\n");
-
-	if (host->cd_gpio >= 0)
-		*cd = !gpio_get_value(host->cd_gpio);
-	else
-		*cd = 1;
-
-	return 0;
-}
-- 
1.7.8