mfd: Add support for stmpe variant 610

STMPE610 is very much like STMPE811, except the number of gpio pins, which is 8
in 811 and 6 in 610. This patch adds support for variant 610. STMPE610 will
share most of the code with STMPE811.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/stmpe-i2c.c

diff --git a/drivers/mfd/stmpe-i2c.c b/drivers/mfd/stmpe-i2c.c
index 0a43659..b11d33b 100644
--- a/drivers/mfd/stmpe-i2c.c
+++ b/drivers/mfd/stmpe-i2c.c
@@ -71,6 +71,7 @@
 }
 
 static const struct i2c_device_id stmpe_i2c_id[] = {
+	{ "stmpe610", STMPE610 },
 	{ "stmpe811", STMPE811 },
 	{ "stmpe1601", STMPE1601 },
 	{ "stmpe2401", STMPE2401 },

drivers/mfd/stmpe-spi.c

diff --git a/drivers/mfd/stmpe-spi.c b/drivers/mfd/stmpe-spi.c
index 53efce4..46963a5 100644
--- a/drivers/mfd/stmpe-spi.c
+++ b/drivers/mfd/stmpe-spi.c
@@ -109,6 +109,7 @@
 }
 
 static const struct spi_device_id stmpe_spi_id[] = {
+	{ "stmpe610", STMPE610 },
 	{ "stmpe811", STMPE811 },
 	{ "stmpe1601", STMPE1601 },
 	{ "stmpe2401", STMPE2401 },

drivers/mfd/stmpe.c

diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c
index 83bacde..67ff3dc 100644
--- a/drivers/mfd/stmpe.c
+++ b/drivers/mfd/stmpe.c
@@ -321,7 +321,7 @@
 };
 
 /*
- * Touchscreen (STMPE811)
+ * Touchscreen (STMPE811 or STMPE610)
  */
 
 static struct resource stmpe_ts_resources[] = {
@@ -346,7 +346,7 @@
 };
 
 /*
- * STMPE811
+ * STMPE811 or STMPE610
  */
 
 static const u8 stmpe811_regs[] = {
@@ -417,6 +417,21 @@
 	.get_altfunc	= stmpe811_get_altfunc,
 };
 
+/* Similar to 811, except number of gpios */
+static struct stmpe_variant_info stmpe610 = {
+	.name		= "stmpe610",
+	.id_val		= 0x0811,
+	.id_mask	= 0xffff,
+	.num_gpios	= 6,
+	.af_bits	= 1,
+	.regs		= stmpe811_regs,
+	.blocks		= stmpe811_blocks,
+	.num_blocks	= ARRAY_SIZE(stmpe811_blocks),
+	.num_irqs	= STMPE811_NR_INTERNAL_IRQS,
+	.enable		= stmpe811_enable,
+	.get_altfunc	= stmpe811_get_altfunc,
+};
+
 /*
  * STMPE1601
  */
@@ -651,6 +666,7 @@
 };
 
 static struct stmpe_variant_info *stmpe_variant_info[] = {
+	[STMPE610]	= &stmpe610,
 	[STMPE811]	= &stmpe811,
 	[STMPE1601]	= &stmpe1601,
 	[STMPE2401]	= &stmpe2401,