gpio/crystalcove: Add additional GPIO for Panel control

Export PANEL_EN/DISABLE (offset 0x52) as additional GPIO. Needed
by display driver to enable the DSI panel on BYT platform where
the Panel EN/Disable control is routed thorugh CRC PMIC

CC: Samuel Ortiz <sameo@linux.intel.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/gpio/gpio-crystalcove.c b/drivers/gpio/gpio-crystalcove.c
index 3d9e08f7e823..91a7ffe83135 100644
--- a/drivers/gpio/gpio-crystalcove.c
+++ b/drivers/gpio/gpio-crystalcove.c
@@ -24,7 +24,7 @@
 #include <linux/mfd/intel_soc_pmic.h>
 
 #define CRYSTALCOVE_GPIO_NUM    16
-#define CRYSTALCOVE_VGPIO_NUM   94
+#define CRYSTALCOVE_VGPIO_NUM   95
 
 #define UPDATE_IRQ_TYPE         BIT(0)
 #define UPDATE_IRQ_MASK         BIT(1)
@@ -39,6 +39,7 @@
 #define GPIO0P0CTLI             0x33
 #define GPIO1P0CTLO             0x3b
 #define GPIO1P0CTLI             0x43
+#define GPIOPANELCTL            0x52
 
 #define CTLI_INTCNT_DIS         (0)
 #define CTLI_INTCNT_NE          (1 << 1)
@@ -93,6 +94,10 @@ static inline int to_reg(int gpio, enum ctrl_register reg_type)
 {
         int reg;
 
+        if (gpio == 94) {
+                return GPIOPANELCTL;
+        }
+
         if (reg_type == CTRL_IN) {
                 if (gpio < 8)
                         reg = GPIO0P0CTLI;