[U-Boot] [PATCH 21/26] mmc: mtk-sd: add a dts property cd-active-high for builtin-cd mode

[Weijie Gao]

This patch adds a dts property cd-active-high for builtin-cd mode to make
it configurable instead of using hardcoded active-low.

Signed-off-by: Weijie Gao <weijie.gao at mediatek.com>
---
 drivers/mmc/mtk-sd.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/mtk-sd.c b/drivers/mmc/mtk-sd.c
index 7069fe8948..814a1b5fe9 100644
--- a/drivers/mmc/mtk-sd.c
+++ b/drivers/mmc/mtk-sd.c
@@ -270,6 +270,7 @@ struct msdc_host {
 
 	/* whether to use gpio detection or built-in hw detection */
 	bool builtin_cd;
+	bool cd_active_high;
 
 	/* card detection / write protection GPIOs */
 #if CONFIG_IS_ENABLED(DM_GPIO)
@@ -852,7 +853,12 @@ static int msdc_ops_get_cd(struct udevice *dev)
 
 	if (host->builtin_cd) {
 		val = readl(&host->base->msdc_ps);
-		return !(val & MSDC_PS_CDSTS);
+		val &= MSDC_PS_CDSTS;
+
+		if (!host->cd_active_high)
+			val = !val;
+
+		return val;
 	}
 
 #if CONFIG_IS_ENABLED(DM_GPIO)
@@ -1355,6 +1361,7 @@ static int msdc_ofdata_to_platdata(struct udevice *dev)
 	host->latch_ck = dev_read_u32_default(dev, "latch-ck", 0);
 	host->r_smpl = dev_read_u32_default(dev, "r_smpl", 0);
 	host->builtin_cd = dev_read_u32_default(dev, "builtin-cd", 0);
+	host->cd_active_high = dev_read_bool(dev, "cd-active-high");
 
 	return 0;
 }
-- 
2.17.1