[PATCH 1/2] mmc: fsl_esdhc_imx: Handle the "broken-cd" property

[Fabio Estevam <festevam@gmail.com>]

When no GPIO is used to read the card detect status the following
error is seen:

MMC:   FSL_SDHC: 0, FSL_SDHC: 1                                                 
Loading Environment from MMC... MMC: no card present                           
*** Warning - No block device, using default environment 

Fix it by handling the "broken-cd" property in the same way
that drivers/mmc/sdhci.c does, which considers that the SD card
is present when the "broken-cd" property is passed.

Tested on a imx6ul-evk board.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
---
 drivers/mmc/fsl_esdhc_imx.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/mmc/fsl_esdhc_imx.c b/drivers/mmc/fsl_esdhc_imx.c
index f1afab742d..7d465ef76b 100644
--- a/drivers/mmc/fsl_esdhc_imx.c
+++ b/drivers/mmc/fsl_esdhc_imx.c
@@ -115,6 +115,7 @@ struct esdhc_soc_data {
  * Following is used when Driver Model is enabled for MMC
  * @dev: pointer for the device
  * @non_removable: 0: removable; 1: non-removable
+ * @broken_cd: 0: use GPIO for card detect; 1: Do not use GPIO for card detect
  * @wp_enable: 1: enable checking wp; 0: no check
  * @vs18_enable: 1: use 1.8V voltage; 0: use 3.3V
  * @flags: ESDHC_FLAG_xx in include/fsl_esdhc_imx.h
@@ -138,6 +139,7 @@ struct fsl_esdhc_priv {
 #endif
 	struct udevice *dev;
 	int non_removable;
+	int broken_cd;
 	int wp_enable;
 	int vs18_enable;
 	u32 flags;
@@ -1092,6 +1094,9 @@ static int esdhc_getcd_common(struct fsl_esdhc_priv *priv)
 #if CONFIG_IS_ENABLED(DM_MMC)
 	if (priv->non_removable)
 		return 1;
+
+	if (priv->broken_cd)
+		return 1;
 #ifdef CONFIG_DM_GPIO
 	if (dm_gpio_is_valid(&priv->cd_gpio))
 		return dm_gpio_get_value(&priv->cd_gpio);
@@ -1450,6 +1455,9 @@ static int fsl_esdhc_probe(struct udevice *dev)
 			     ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_DEFAULT);
 	priv->strobe_dll_delay_target = val;
 
+	if (dev_read_bool(dev, "broken-cd"))
+		priv->broken_cd = 1;
+
 	if (dev_read_bool(dev, "non-removable")) {
 		priv->non_removable = 1;
 	 } else {
-- 
2.17.1