diff options
| author | Fabian Vogt | 2016-09-26 14:26:43 +0200 |
|---|---|---|
| committer | Tom Rini | 2016-11-28 20:09:45 -0500 |
| commit | 4faf5f93c61632c18e435dc6a190b30893786a10 (patch) | |
| tree | 5f86f0037690559ecb084d0b1589fe0b5c3c38d7 | |
| parent | 7aa1a6b71c9af4651f6b3a164c84096a84d24285 (diff) | |
gpio: bcm2835: add device tree support
This patch adds device tree support for the bcm2835 GPIO driver.
Signed-off-by: Fabian Vogt <fvogt@suse.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | doc/device-tree-bindings/gpio/bcm2835-gpio.txt | 5 | ||||
| -rw-r--r-- | drivers/gpio/bcm2835_gpio.c | 24 |
2 files changed, 29 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/gpio/bcm2835-gpio.txt b/doc/device-tree-bindings/gpio/bcm2835-gpio.txt new file mode 100644 index 00000000000..21e0610b355 --- /dev/null +++ b/doc/device-tree-bindings/gpio/bcm2835-gpio.txt @@ -0,0 +1,5 @@ +* Broadcom BCM283x GPIO controller + +Required properties: +- compatible: must be "brcm,bcm2835-gpio" +- reg: exactly one register range with length 0xb4 diff --git a/drivers/gpio/bcm2835_gpio.c b/drivers/gpio/bcm2835_gpio.c index 8dd7a28e267..cd5480ee094 100644 --- a/drivers/gpio/bcm2835_gpio.c +++ b/drivers/gpio/bcm2835_gpio.c @@ -10,6 +10,7 @@ #include <errno.h> #include <asm/gpio.h> #include <asm/io.h> +#include <fdtdec.h> struct bcm2835_gpios { struct bcm2835_gpio_regs *reg; @@ -118,9 +119,32 @@ static int bcm2835_gpio_probe(struct udevice *dev) return 0; } +#if CONFIG_IS_ENABLED(OF_CONTROL) +static const struct udevice_id bcm2835_gpio_id[] = { + {.compatible = "brcm,bcm2835-gpio"}, + {} +}; + +static int bcm2835_gpio_ofdata_to_platdata(struct udevice *dev) +{ + struct bcm2835_gpio_platdata *plat = dev_get_platdata(dev); + fdt_addr_t addr; + + addr = dev_get_addr(dev); + if (addr == FDT_ADDR_T_NONE) + return -EINVAL; + + plat->base = addr; + return 0; +} +#endif + U_BOOT_DRIVER(gpio_bcm2835) = { .name = "gpio_bcm2835", .id = UCLASS_GPIO, + .of_match = of_match_ptr(bcm2835_gpio_id), + .ofdata_to_platdata = of_match_ptr(bcm2835_gpio_ofdata_to_platdata), + .platdata_auto_alloc_size = sizeof(struct bcm2835_gpio_platdata), .ops = &gpio_bcm2835_ops, .probe = bcm2835_gpio_probe, .flags = DM_FLAG_PRE_RELOC, |