mfd: Add support for stmpe variant 801

STMPE801 is a GPIO expander. Registers for 801 are much different from other
variants. This patch adds support for STMPE801 in stmpe mfd driver.

Signed-off-by: Bhupesh Sharma <bhupesh.sharma@st.com>
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/stmpe.h b/drivers/mfd/stmpe.h
index a73f4c1..7b8e13f 100644
--- a/drivers/mfd/stmpe.h
+++ b/drivers/mfd/stmpe.h
@@ -105,6 +105,25 @@
 #define STMPE_ICR_LSB_GIM	(1 << 0)
 
 /*
+ * STMPE801
+ */
+#define STMPE801_ID			0x0108
+#define STMPE801_NR_INTERNAL_IRQS	1
+
+#define STMPE801_REG_CHIP_ID		0x00
+#define STMPE801_REG_VERSION_ID		0x02
+#define STMPE801_REG_SYS_CTRL		0x04
+#define STMPE801_REG_GPIO_INT_EN	0x08
+#define STMPE801_REG_GPIO_INT_STA	0x09
+#define STMPE801_REG_GPIO_MP_STA	0x10
+#define STMPE801_REG_GPIO_SET_PIN	0x11
+#define STMPE801_REG_GPIO_DIR		0x12
+
+#define STMPE801_REG_SYS_CTRL_RESET	(1 << 7)
+#define STMPE801_REG_SYS_CTRL_INT_EN	(1 << 2)
+#define STMPE801_REG_SYS_CTRL_INT_HI	(1 << 0)
+
+/*
  * STMPE811
  */