From 86605cfe8c7c166999bc7476b17940c68bf2f8b7 Mon Sep 17 00:00:00 2001 From: Vipul Kumar Samar Date: Mon, 26 Nov 2012 17:06:51 +0530 Subject: [PATCH] gpio: stmpe: Add DT support for stmpe gpio This patch allows the STMPE GPIO driver to be successfully probed and initialised when Device Tree support is enabled. Bindings are mentioned in Documentation too. Acked-by: Lee Jones Signed-off-by: Vipul Kumar Samar Signed-off-by: Viresh Kumar Signed-off-by: Linus Walleij --- Documentation/devicetree/bindings/gpio/gpio-stmpe.txt | 18 ++++++++++++++++++ drivers/gpio/gpio-stmpe.c | 10 ++++++++-- drivers/mfd/stmpe.c | 2 ++ 3 files changed, 28 insertions(+), 2 deletions(-) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-stmpe.txt diff --git a/Documentation/devicetree/bindings/gpio/gpio-stmpe.txt b/Documentation/devicetree/bindings/gpio/gpio-stmpe.txt new file mode 100644 index 0000000..a0e4cf8 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-stmpe.txt @@ -0,0 +1,18 @@ +STMPE gpio +---------- + +Required properties: + - compatible: "st,stmpe-gpio" + +Optional properties: + - st,norequest-mask: bitmask specifying which GPIOs should _not_ be requestable + due to different usage (e.g. touch, keypad) + +Node name must be stmpe_gpio and should be child node of stmpe node to which it +belongs. + +Example: + stmpe_gpio { + compatible = "st,stmpe-gpio"; + st,norequest-mask = <0x20>; //gpio 5 can't be used + }; diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c index dce3472..522c90e 100644 --- a/drivers/gpio/gpio-stmpe.c +++ b/drivers/gpio/gpio-stmpe.c @@ -12,6 +12,7 @@ #include #include #include +#include #include /* @@ -304,6 +305,7 @@ static void stmpe_gpio_irq_remove(struct stmpe_gpio *stmpe_gpio) static int __devinit stmpe_gpio_probe(struct platform_device *pdev) { struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent); + struct device_node *np = pdev->dev.of_node; struct stmpe_gpio_platform_data *pdata; struct stmpe_gpio *stmpe_gpio; int ret; @@ -321,13 +323,17 @@ static int __devinit stmpe_gpio_probe(struct platform_device *pdev) stmpe_gpio->dev = &pdev->dev; stmpe_gpio->stmpe = stmpe; - stmpe_gpio->norequest_mask = pdata ? pdata->norequest_mask : 0; - stmpe_gpio->chip = template_chip; stmpe_gpio->chip.ngpio = stmpe->num_gpios; stmpe_gpio->chip.dev = &pdev->dev; stmpe_gpio->chip.base = pdata ? pdata->gpio_base : -1; + if (pdata) + stmpe_gpio->norequest_mask = pdata->norequest_mask; + else if (np) + of_property_read_u32(np, "st,norequest-mask", + &stmpe_gpio->norequest_mask); + if (irq >= 0) stmpe_gpio->irq_base = stmpe->irq_base + STMPE_INT_GPIO(0); else diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c index c94f521..79e88d1 100644 --- a/drivers/mfd/stmpe.c +++ b/drivers/mfd/stmpe.c @@ -294,12 +294,14 @@ static struct resource stmpe_gpio_resources[] = { static struct mfd_cell stmpe_gpio_cell = { .name = "stmpe-gpio", + .of_compatible = "st,stmpe-gpio", .resources = stmpe_gpio_resources, .num_resources = ARRAY_SIZE(stmpe_gpio_resources), }; static struct mfd_cell stmpe_gpio_cell_noirq = { .name = "stmpe-gpio", + .of_compatible = "st,stmpe-gpio", /* gpio cell resources consist of an irq only so no resources here */ }; -- 2.7.4