[U-Boot] [PATCH 4/4] exynos: fix and cleanup do_sdhci_init()

[Tobias Jakobi]

The CD check is currently inverted. dm_gpio_get_value() returns
one when a card is detected. All other values (zero when there
is no card, or negative values for the internal errors) indicate
failure.

Signed-off-by: Tobias Jakobi <tjakobi at math.uni-bielefeld.de>
---
 drivers/mmc/s5p_sdhci.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/drivers/mmc/s5p_sdhci.c b/drivers/mmc/s5p_sdhci.c
index 6be3609..bc04370 100644
--- a/drivers/mmc/s5p_sdhci.c
+++ b/drivers/mmc/s5p_sdhci.c
@@ -102,29 +102,31 @@ struct sdhci_host sdhci_host[SDHCI_MAX_HOSTS];
 
 static int do_sdhci_init(struct sdhci_host *host)
 {
-	int dev_id, flag;
-	int err = 0;
+	int dev_id, flag, ret;
 
 	flag = host->bus_width == 8 ? PINMUX_FLAG_8BIT_MODE : PINMUX_FLAG_NONE;
 	dev_id = host->index + PERIPH_ID_SDMMC0;
 
 	if (dm_gpio_is_valid(&host->pwr_gpio)) {
 		dm_gpio_set_value(&host->pwr_gpio, 1);
-		err = exynos_pinmux_config(dev_id, flag);
-		if (err) {
+		ret = exynos_pinmux_config(dev_id, flag);
+		if (ret) {
 			debug("MMC not configured\n");
-			return err;
+			return ret;
 		}
 	}
 
 	if (dm_gpio_is_valid(&host->cd_gpio)) {
-		if (dm_gpio_get_value(&host->cd_gpio))
+		ret = dm_gpio_get_value(&host->cd_gpio);
+		if (ret != 1) {
+			debug("No card detected (%d)\n", ret);
 			return -ENODEV;
+		}
 
-		err = exynos_pinmux_config(dev_id, flag);
-		if (err) {
+		ret = exynos_pinmux_config(dev_id, flag);
+		if (ret) {
 			printf("external SD not configured\n");
-			return err;
+			return ret;
 		}
 	}
 
-- 
2.0.5