msm: 8960: add config option for enabling/disabling SDC3 write protection
SD card write protect pin is only supported on full size SD cards,
micro SD cards do not support write protect pin.
On 8960, one extra PMIC GPIO pin is required for reading the
write protect pin status. But if platform form factor do not
support full size SD card then this GPIO pin would be unused.
This change gives option to enable/disable the SD card write
protect detection for SDC3 slot.
CRs-fixed: 307459
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
diff --git a/arch/arm/configs/msm8960_defconfig b/arch/arm/configs/msm8960_defconfig
index dedfd70..62909a0 100644
--- a/arch/arm/configs/msm8960_defconfig
+++ b/arch/arm/configs/msm8960_defconfig
@@ -337,6 +337,7 @@
CONFIG_MMC_MSM_SDC1_8_BIT_SUPPORT=y
# CONFIG_MMC_MSM_SDC2_SUPPORT is not set
CONFIG_MMC_MSM_SDC3_SUPPORT=y
+CONFIG_MMC_MSM_SDC3_WP_SUPPORT=y
CONFIG_MMC_MSM_SPS_SUPPORT=y
CONFIG_LEDS_PM8XXX=y
# CONFIG_LEDS_MSM_PMIC is not set
diff --git a/arch/arm/mach-msm/board-msm8960.c b/arch/arm/mach-msm/board-msm8960.c
index a460ca7..2ec02ef 100644
--- a/arch/arm/mach-msm/board-msm8960.c
+++ b/arch/arm/mach-msm/board-msm8960.c
@@ -2500,7 +2500,9 @@
.mmc_bus_width = MMC_CAP_4_BIT_DATA,
.sup_clk_table = sdc3_sup_clk_rates,
.sup_clk_cnt = ARRAY_SIZE(sdc3_sup_clk_rates),
+#ifdef CONFIG_MMC_MSM_SDC3_WP_SUPPORT
.wpswitch_gpio = PM8921_GPIO_PM_TO_SYS(16),
+#endif
.sdcc_v4_sup = true,
.vreg_data = &mmc_slot_vreg_data[SDCC3],
.pin_data = &mmc_slot_pin_data[SDCC3],
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 7c85974..ddb3881 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -504,6 +504,13 @@
help
Select Y to enable 8bit support for Slot 3.
+config MMC_MSM_SDC3_WP_SUPPORT
+ boolean "Qualcomm SDC3 write protection support"
+ depends on MMC_MSM_SDC3_SUPPORT
+ default n
+ help
+ Select Y to enable write protection support for Slot 3.
+
config MMC_MSM_SDC4_SUPPORT
boolean "Qualcomm SDC4 support"
depends on MMC_MSM