[PATCH v2 0/2] Add irq_over_gpio DT support to STMPE

These patches add support for using a GPIO as an IRQ source for the
STMPE module when configured using device tree.

Changes since v1:
    - Split actual patch and Documentation into two parts

Sean Cross (2):
  mfd: stmpe: support gpio over irq under device tree
  mfd: stmpe: Document DT binding for irq_over_gpio

 Documentation/devicetree/bindings/mfd/stmpe.txt | 1 +
 drivers/mfd/stmpe.c                             | 7 ++++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

-- 
2.1.0

The stmpe_platform_data has a irq_over_gpio field, which allows the
system to read STMPE events whenever an IRQ occurs on a GPIO pin.
This patch adds the ability to configure this field and to use a GPIO
as an IRQ source for boards configuring the STMPE in device tree.

Signed-off-by: Sean Cross <redacted>
---
 drivers/mfd/stmpe.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c
index 3b6bfa7..4c42b05 100644
--- a/drivers/mfd/stmpe.c
+++ b/drivers/mfd/stmpe.c

@@ -1122,7 +1122,12 @@ static void stmpe_of_probe(struct stmpe_platform_data *pdata,
 	if (pdata->id < 0)
 		pdata->id = -1;
 
-	pdata->irq_trigger = IRQF_TRIGGER_NONE;
+	pdata->irq_gpio = of_get_named_gpio_flags(np, "irq-gpio", 0,
+				&pdata->irq_trigger);
+	if (gpio_is_valid(pdata->irq_gpio))
+		pdata->irq_over_gpio = 1;
+	else
+		pdata->irq_trigger = IRQF_TRIGGER_NONE;
 
 	of_property_read_u32(np, "st,autosleep-timeout",
 			&pdata->autosleep_timeout);

-- 
2.1.0

STMPE now supports using a GPIO as an IRQ source.  Document the device
tree binding for this option.

Signed-off-by: Sean Cross <redacted>
---
 Documentation/devicetree/bindings/mfd/stmpe.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/mfd/stmpe.txt b/Documentation/devicetree/bindings/mfd/stmpe.txt
index 56edb55..3fb68bf 100644
--- a/Documentation/devicetree/bindings/mfd/stmpe.txt
+++ b/Documentation/devicetree/bindings/mfd/stmpe.txt

@@ -13,6 +13,7 @@ Optional properties:
  - interrupt-parent             : Specifies which IRQ controller we're connected to
  - wakeup-source                : Marks the input device as wakable
  - st,autosleep-timeout         : Valid entries (ms); 4, 16, 32, 64, 128, 256, 512 and 1024
+ - irq-gpio                     : If present, which GPIO to use for event IRQ
 
 Example:
 

-- 
2.1.0

On Fri, 12 Sep 2014, Sean Cross wrote:

The stmpe_platform_data has a irq_over_gpio field, which allows the
system to read STMPE events whenever an IRQ occurs on a GPIO pin.
This patch adds the ability to configure this field and to use a GPIO
as an IRQ source for boards configuring the STMPE in device tree.

Signed-off-by: Sean Cross <redacted>
---
 drivers/mfd/stmpe.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

Applied, thanks.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

On Fri, 12 Sep 2014, Sean Cross wrote:

STMPE now supports using a GPIO as an IRQ source.  Document the device
tree binding for this option.

Signed-off-by: Sean Cross <redacted>
---
 Documentation/devicetree/bindings/mfd/stmpe.txt | 1 +
 1 file changed, 1 insertion(+)

Applied, thanks.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog