mfd: stmpe: Update DT support for stmpe driver

This patch extends existing DT support for stmpe devices. This updates:
- missing header files in stmpe.c
- stmpe_of_probe() with pwm, rotator and new bindings.
- Bindings are updated in binding document.

Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vipul Kumar Samar <vipulkumar.samar@st.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

2 files changed, 21 insertions, 9 deletions

diff --git a/Documentation/devicetree/bindings/mfd/stmpe.txt b/Documentation/devicetree/bindings/mfd/stmpe.txt
index c98450887d5e..56edb5520685 100644
--- a/Documentation/devicetree/bindings/mfd/stmpe.txt
+++ b/Documentation/devicetree/bindings/mfd/stmpe.txt
@@ -1,8 +1,11 @@
-* STMPE Multi-Functional Device
+* ST Microelectronics STMPE Multi-Functional Device
+
+STMPE is an MFD device which may expose the following inbuilt devices: gpio,
+keypad, touchscreen, adc, pwm, rotator.
 
 Required properties:
- - compatible                   : "st,stmpe[811|1601|2401|2403]"
- - reg                          : I2C address of the device
+ - compatible                   : "st,stmpe[610|801|811|1601|2401|2403]"
+ - reg                          : I2C/SPI address of the device
 
 Optional properties:
  - interrupts                   : The interrupt outputs from the controller
diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c
index 90c6151bc52e..b18cc1a1b162 100644
--- a/drivers/mfd/stmpe.c
+++ b/drivers/mfd/stmpe.c
@@ -7,6 +7,7 @@
  * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
  */
 
+#include <linux/err.h>
 #include <linux/gpio.h>
 #include <linux/export.h>
 #include <linux/kernel.h>
@@ -14,6 +15,7 @@
 #include <linux/irq.h>
 #include <linux/irqdomain.h>
 #include <linux/of.h>
+#include <linux/of_gpio.h>
 #include <linux/pm.h>
 #include <linux/slab.h>
 #include <linux/mfd/core.h>
@@ -1012,6 +1014,9 @@ void __devinit stmpe_of_probe(struct stmpe_platform_data *pdata,
 {
         struct device_node *child;
 
+        pdata->id = -1;
+        pdata->irq_trigger = IRQF_TRIGGER_NONE;
+
         of_property_read_u32(np, "st,autosleep-timeout",
                         &pdata->autosleep_timeout);
 
@@ -1020,15 +1025,16 @@ void __devinit stmpe_of_probe(struct stmpe_platform_data *pdata,
         for_each_child_of_node(np, child) {
                 if (!strcmp(child->name, "stmpe_gpio")) {
                         pdata->blocks |= STMPE_BLOCK_GPIO;
-                }
-                if (!strcmp(child->name, "stmpe_keypad")) {
+                } else if (!strcmp(child->name, "stmpe_keypad")) {
                         pdata->blocks |= STMPE_BLOCK_KEYPAD;
-                }
-                if (!strcmp(child->name, "stmpe_touchscreen")) {
+                } else if (!strcmp(child->name, "stmpe_touchscreen")) {
                         pdata->blocks |= STMPE_BLOCK_TOUCHSCREEN;
-                }
-                if (!strcmp(child->name, "stmpe_adc")) {
+                } else if (!strcmp(child->name, "stmpe_adc")) {
                         pdata->blocks |= STMPE_BLOCK_ADC;
+                } else if (!strcmp(child->name, "stmpe_pwm")) {
+                        pdata->blocks |= STMPE_BLOCK_PWM;
+                } else if (!strcmp(child->name, "stmpe_rotator")) {
+                        pdata->blocks |= STMPE_BLOCK_ROTATOR;
                 }
         }
 }
@@ -1099,6 +1105,9 @@ int __devinit stmpe_probe(struct stmpe_client_info *ci, int partnum)
                         return -ENODEV;
                 }
                 stmpe->variant = stmpe_noirq_variant_info[stmpe->partnum];
+        } else if (pdata->irq_trigger == IRQF_TRIGGER_NONE) {
+                pdata->irq_trigger =
+                        irqd_get_trigger_type(irq_get_irq_data(stmpe->irq));
         }
 
         ret = stmpe_chip_init(stmpe);