diff options
| author |   Shawn Guo <shawn.guo@linaro.org> | 2011-07-07 00:37:43 +0800 |
|---|---|---|
| committer |   Grant Likely <grant.likely@secretlab.ca> | 2011-07-08 12:38:18 -0600 |
| commit | 8937cb602bea120248cef64961fc46836a394c8a (patch) | |
| tree | dff8c06485812bf1316a7da37c3f690f313b4508 /drivers/gpio | |
| parent | ARM: mxc: use ARCH_NR_GPIOS to define gpio number (diff) | |
| download | linux-dev-8937cb602bea120248cef64961fc46836a394c8a.tar.xz linux-dev-8937cb602bea120248cef64961fc46836a394c8a.zip | |
gpio/mxc: add device tree probe support
The patch adds device tree probe support for gpio-mxc driver.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-mxc.c | 34 |
1 files changed, 28 insertions, 6 deletions
diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c index 3775dccef4ad..89fda58db90d 100644 --- a/drivers/gpio/gpio-mxc.c +++ b/drivers/gpio/gpio-mxc.c @@ -27,6 +27,8 @@ #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/basic_mmio_gpio.h> +#include <linux/of.h> +#include <linux/of_device.h> #include <asm-generic/bug.h> enum mxc_gpio_hwtype { @@ -120,6 +122,13 @@ static struct platform_device_id mxc_gpio_devtype[] = { } }; +static const struct of_device_id mxc_gpio_dt_ids[] = { + { .compatible = "fsl,imx1-gpio", .data = &mxc_gpio_devtype[IMX1_GPIO], }, + { .compatible = "fsl,imx21-gpio", .data = &mxc_gpio_devtype[IMX21_GPIO], }, + { .compatible = "fsl,imx31-gpio", .data = &mxc_gpio_devtype[IMX31_GPIO], }, + { /* sentinel */ } +}; + /* * MX2 has one interrupt *for all* gpio ports. The list is used * to save the references to all ports, so that mx2_gpio_irq_handler @@ -302,7 +311,13 @@ static void __init mxc_gpio_init_gc(struct mxc_gpio_port *port) static void __devinit mxc_gpio_get_hw(struct platform_device *pdev) { - enum mxc_gpio_hwtype hwtype = pdev->id_entry->driver_data; + const struct of_device_id *of_id = + of_match_device(mxc_gpio_dt_ids, &pdev->dev); + enum mxc_gpio_hwtype hwtype; + + if (of_id) + pdev->id_entry = of_id->data; + hwtype = pdev->id_entry->driver_data; if (mxc_gpio_hwtype) { /* @@ -324,6 +339,7 @@ static void __devinit mxc_gpio_get_hw(struct platform_device *pdev) static int __devinit mxc_gpio_probe(struct platform_device *pdev) { + struct device_node *np = pdev->dev.of_node; struct mxc_gpio_port *port; struct resource *iores; int err; @@ -334,8 +350,6 @@ static int __devinit mxc_gpio_probe(struct platform_device *pdev) if (!port) return -ENOMEM; - port->virtual_irq_start = MXC_GPIO_IRQ_START + pdev->id * 32; - iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!iores) { err = -ENODEV; @@ -365,9 +379,6 @@ static int __devinit mxc_gpio_probe(struct platform_device *pdev) writel(0, port->base + GPIO_IMR); writel(~0, port->base + GPIO_ISR); - /* gpio-mxc can be a generic irq chip */ - mxc_gpio_init_gc(port); - if (mxc_gpio_hwtype == IMX21_GPIO) { /* setup one handler for all GPIO interrupts */ if (pdev->id == 0) @@ -400,6 +411,16 @@ static int __devinit mxc_gpio_probe(struct platform_device *pdev) if (err) goto out_bgpio_remove; + /* + * In dt case, we use gpio number range dynamically + * allocated by gpio core. + */ + port->virtual_irq_start = MXC_GPIO_IRQ_START + (np ? port->bgc.gc.base : + pdev->id * 32); + + /* gpio-mxc can be a generic irq chip */ + mxc_gpio_init_gc(port); + list_add_tail(&port->node, &mxc_gpio_ports); return 0; @@ -420,6 +441,7 @@ static struct platform_driver mxc_gpio_driver = { .driver = { .name = "gpio-mxc", .owner = THIS_MODULE, + .of_match_table = mxc_gpio_dt_ids, }, .probe = mxc_gpio_probe, .id_table = mxc_gpio_devtype, |