From: Vipul Kumar Samar <vipulkumar.sa...@st.com> 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.
Signed-off-by: Vipul Kumar Samar <vipulkumar.sa...@st.com> Signed-off-by: Viresh Kumar <viresh.ku...@linaro.org> --- Documentation/devicetree/bindings/gpio/gpio-stmpe.txt | 18 ++++++++++++++++++ drivers/gpio/gpio-stmpe.c | 15 ++++++++++++--- drivers/mfd/stmpe.c | 2 ++ 3 files changed, 32 insertions(+), 3 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..7f010e0 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-stmpe.txt @@ -0,0 +1,18 @@ +STMPE gpio +---------- + +Required properties: + - compatible: "st,stmpe-gpio" + +Optional properties: + - 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..91455d4 100644 --- a/drivers/gpio/gpio-stmpe.c +++ b/drivers/gpio/gpio-stmpe.c @@ -12,6 +12,7 @@ #include <linux/gpio.h> #include <linux/irq.h> #include <linux/interrupt.h> +#include <linux/of.h> #include <linux/mfd/stmpe.h> /* @@ -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; @@ -321,12 +323,19 @@ 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; + stmpe_gpio->chip.base = pdata->gpio_base; + } else { + stmpe_gpio->chip.base = -1; + if (np) + of_property_read_u32(np, "st,norequest-mask", + &pdata->norequest_mask); + } if (irq >= 0) stmpe_gpio->irq_base = stmpe->irq_base + STMPE_INT_GPIO(0); diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c index e2c0dda..c757ac3 100644 --- a/drivers/mfd/stmpe.c +++ b/drivers/mfd/stmpe.c @@ -298,12 +298,14 @@ 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 */ }; -- 1.7.12.rc2.18.g61b472e -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/