ARM: mach-shmobile: mackerel: Add support get_cd in CN23

Signed-off-by: Yusuke Goda <yusuke.goda.sx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/board-mackerel.c b/arch/arm/mach-shmobile/board-mackerel.c
index 5bcf5c1e1399..f0547dcb1d8c 100644
--- a/arch/arm/mach-shmobile/board-mackerel.c
+++ b/arch/arm/mach-shmobile/board-mackerel.c
@@ -729,6 +729,15 @@ static struct platform_device sdhi1_device = {
 };
 #endif
 
+/*
+ * The card detect pin of the top SD/MMC slot (CN23) is active low and is
+ * connected to GPIO SCIFB_SCK of SH7372 (GPIO_PORT162).
+ */
+static int slot_cn23_get_cd(struct platform_device *pdev)
+{
+        return !gpio_get_value(GPIO_PORT162);
+}
+
 /* SDHI2 */
 static struct sh_mobile_sdhi_info sdhi2_info = {
         .dma_slave_tx   = SHDMA_SLAVE_SDHI2_TX,
@@ -736,6 +745,7 @@ static struct sh_mobile_sdhi_info sdhi2_info = {
         .tmio_flags     = TMIO_MMC_WRPROTECT_DISABLE,
         .tmio_caps      = MMC_CAP_SD_HIGHSPEED |
                           MMC_CAP_NEEDS_POLL,
+        .get_cd         = slot_cn23_get_cd,
 };
 
 static struct resource sdhi2_resources[] = {
@@ -1127,6 +1137,10 @@ static void __init mackerel_init(void)
         gpio_request(GPIO_FN_SDHID2_1, NULL);
         gpio_request(GPIO_FN_SDHID2_0, NULL);
 
+        /* card detect pin for microSD slot (CN23) */
+        gpio_request(GPIO_PORT162, NULL);
+        gpio_direction_input(GPIO_PORT162);
+
         /* MMCIF */
         gpio_request(GPIO_FN_MMCD0_0, NULL);
         gpio_request(GPIO_FN_MMCD0_1, NULL);