[U-Boot] [PATCH 02/21] sunxi: mmc: Fix card-detect gpio handling to work with the device-model

[Hans de Goede]

The device-model gpio functions may return another value then -1 as error,
make the sunxi mmc code properly handle this.

Signed-off-by: Hans de Goede <hdego...@redhat.com>
---
 drivers/mmc/sunxi_mmc.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/sunxi_mmc.c b/drivers/mmc/sunxi_mmc.c
index fcc278d..a664236 100644
--- a/drivers/mmc/sunxi_mmc.c
+++ b/drivers/mmc/sunxi_mmc.c
@@ -9,6 +9,7 @@
  */
 
 #include <common.h>
+#include <errno.h>
 #include <malloc.h>
 #include <mmc.h>
 #include <asm/io.h>
@@ -37,7 +38,7 @@ static int sunxi_mmc_getcd_gpio(int sdc_no)
        case 2: return sunxi_name_to_gpio(CONFIG_MMC2_CD_PIN);
        case 3: return sunxi_name_to_gpio(CONFIG_MMC3_CD_PIN);
        }
-       return -1;
+       return -EINVAL;
 }
 
 static int mmc_resource_init(int sdc_no)
@@ -72,7 +73,7 @@ static int mmc_resource_init(int sdc_no)
        mmchost->mmc_no = sdc_no;
 
        cd_pin = sunxi_mmc_getcd_gpio(sdc_no);
-       if (cd_pin != -1) {
+       if (cd_pin >= 0) {
                ret = gpio_request(cd_pin, "mmc_cd");
                if (!ret)
                        ret = gpio_direction_input(cd_pin);
@@ -424,7 +425,7 @@ static int sunxi_mmc_getcd(struct mmc *mmc)
        int cd_pin;
 
        cd_pin = sunxi_mmc_getcd_gpio(mmchost->mmc_no);
-       if (cd_pin == -1)
+       if (cd_pin < 0)
                return 1;
 
        return !gpio_get_value(cd_pin);
-- 
2.3.5

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