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gpio: bcm2835: add device tree support

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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>
This commit is contained in:
Fabian Vogt 2016-09-26 14:26:43 +02:00 committed by Tom Rini
parent 7aa1a6b71c
commit 4faf5f93c6
2 changed files with 29 additions and 0 deletions
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5
doc/device-tree-bindings/gpio/bcm2835-gpio.txt Normal file
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@ -0,0 +1,5 @@
* Broadcom BCM283x GPIO controller
Required properties:
- compatible: must be "brcm,bcm2835-gpio"
- reg: exactly one register range with length 0xb4

24
drivers/gpio/bcm2835_gpio.c
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@ -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,