diff options
| author | Shawn Guo <shawn.guo@linaro.org> | 2012-05-04 08:29:22 +0200 |
|---|---|---|
| committer | Shawn Guo <shawn.guo@linaro.org> | 2012-05-12 07:32:19 +0200 |
| commit | 4052d45e800ce33e1993fb70604941547ed73d26 (patch) | |
| tree | 8cf84a968f897313a5db502239dbe9eaf45dd6aa /drivers/gpio | |
| parent | gpio/mxs: get rid of the use of cpu_is_xxx (diff) | |
| download | linux-4052d45e800ce33e1993fb70604941547ed73d26.tar.xz linux-4052d45e800ce33e1993fb70604941547ed73d26.zip | |
gpio/mxs: add device tree probe
It adds device tree probe for gpio-mxs driver.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-mxs.c | 36 |
1 files changed, 32 insertions, 4 deletions
diff --git a/drivers/gpio/gpio-mxs.c b/drivers/gpio/gpio-mxs.c index 38ae56f17916..429228b52acd 100644 --- a/drivers/gpio/gpio-mxs.c +++ b/drivers/gpio/gpio-mxs.c @@ -25,6 +25,9 @@ #include <linux/io.h> #include <linux/irq.h> #include <linux/gpio.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/basic_mmio_gpio.h> @@ -207,8 +210,19 @@ static struct platform_device_id mxs_gpio_ids[] = { }; MODULE_DEVICE_TABLE(platform, mxs_gpio_ids); +static const struct of_device_id mxs_gpio_dt_ids[] = { + { .compatible = "fsl,imx23-gpio", .data = (void *) IMX23_GPIO, }, + { .compatible = "fsl,imx28-gpio", .data = (void *) IMX28_GPIO, }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, mxs_gpio_dt_ids); + static int __devinit mxs_gpio_probe(struct platform_device *pdev) { + const struct of_device_id *of_id = + of_match_device(mxs_gpio_dt_ids, &pdev->dev); + struct device_node *np = pdev->dev.of_node; + struct device_node *parent; static void __iomem *base; struct mxs_gpio_port *port; struct resource *iores = NULL; @@ -218,8 +232,15 @@ static int __devinit mxs_gpio_probe(struct platform_device *pdev) if (!port) return -ENOMEM; - port->id = pdev->id; - port->devid = pdev->id_entry->driver_data; + if (np) { + port->id = of_alias_get_id(np, "gpio"); + if (port->id < 0) + return port->id; + port->devid = (enum mxs_gpio_id) of_id->data; + } else { + port->id = pdev->id; + port->devid = pdev->id_entry->driver_data; + } port->virtual_irq_start = MXS_GPIO_IRQ_START + port->id * 32; port->irq = platform_get_irq(pdev, 0); @@ -231,8 +252,14 @@ static int __devinit mxs_gpio_probe(struct platform_device *pdev) * share the same one */ if (!base) { - iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); - base = devm_request_and_ioremap(&pdev->dev, iores); + if (np) { + parent = of_get_parent(np); + base = of_iomap(parent, 0); + of_node_put(parent); + } else { + iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_request_and_ioremap(&pdev->dev, iores); + } if (!base) return -EADDRNOTAVAIL; } @@ -278,6 +305,7 @@ static struct platform_driver mxs_gpio_driver = { .driver = { .name = "gpio-mxs", .owner = THIS_MODULE, + .of_match_table = mxs_gpio_dt_ids, }, .probe = mxs_gpio_probe, .id_table = mxs_gpio_ids, |