mmc: dw_mmc: nexell: increase gpio strength for mmc

When GPIO strength value is default, some SDCard is not recongnized.
So, This patch increases gpio strength for mmc.

Change-Id: Ib73582f1bfe368ad674209d8ecd225db6761e17c
Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com>

diff --git a/drivers/mmc/nexell_dw_mmc.c b/drivers/mmc/nexell_dw_mmc.c
index 45e232673452767a6eccbd465c15391354cee30d..546e7e79002782d6a7ebae28b50fa3e9a65c5fdf 100644 (file)
--- a/drivers/mmc/nexell_dw_mmc.c
+++ b/drivers/mmc/nexell_dw_mmc.c
@@ -49,6 +49,13 @@ static void set_mmc_pad_func(struct dwmci_host *host)
                nx_gpio_set_pad_function(1, 3, 1);
                nx_gpio_set_pad_function(1, 5, 1);
                nx_gpio_set_pad_function(1, 7, 1);
+
+               nx_gpio_set_drive_strength(0, 29, 2);
+               nx_gpio_set_drive_strength(0, 31, 1);
+               nx_gpio_set_drive_strength(1, 1, 1);
+               nx_gpio_set_drive_strength(1, 3, 1);
+               nx_gpio_set_drive_strength(1, 5, 1);
+               nx_gpio_set_drive_strength(1, 7, 1);
                break;
        case 1:
                nx_gpio_set_pad_function(3, 22, 1);
@@ -65,11 +72,24 @@ static void set_mmc_pad_func(struct dwmci_host *host)
                nx_gpio_set_pad_function(2, 21, 2);
                nx_gpio_set_pad_function(2, 22, 2);
                nx_gpio_set_pad_function(2, 23, 2);
+
+               nx_gpio_set_drive_strength(2, 18, 2);
+               nx_gpio_set_drive_strength(2, 19, 1);
+               nx_gpio_set_drive_strength(2, 20, 1);
+               nx_gpio_set_drive_strength(2, 21, 1);
+               nx_gpio_set_drive_strength(2, 22, 1);
+               nx_gpio_set_drive_strength(2, 23, 1);
+
                if (host->buswidth == 8) {
                        nx_gpio_set_pad_function(4, 21, 2);
                        nx_gpio_set_pad_function(4, 22, 2);
                        nx_gpio_set_pad_function(4, 23, 2);
                        nx_gpio_set_pad_function(4, 24, 2);
+
+                       nx_gpio_set_drive_strength(4, 21, 3);
+                       nx_gpio_set_drive_strength(4, 22, 3);
+                       nx_gpio_set_drive_strength(4, 23, 3);
+                       nx_gpio_set_drive_strength(4, 24, 3);
                }
                break;
        }