File 0020-bcm2835_gpio-add-device-tree-suppor.patch of Package u-boot
From 2913dae57066645c8700aa387cf90a378ada96c6 Mon Sep 17 00:00:00 2001
From: Fabian Vogt <fvogt@suse.com>
Date: Thu, 8 Sep 2016 14:15:11 +0200
Subject: [PATCH] bcm2835_gpio: add device tree support
This patch adds device tree support for the bcm2835 GPIO driver.
---
doc/device-tree-bindings/gpio/bcm2835-gpio.txt | 5 +++++
drivers/gpio/bcm2835_gpio.c | 26 ++++++++++++++++++++++++++
2 files changed, 31 insertions(+)
create mode 100644 doc/device-tree-bindings/gpio/bcm2835-gpio.txt
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 0000000..21e0610
--- /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 8b88d79..ead5b61 100644
--- a/drivers/gpio/bcm2835_gpio.c
+++ b/drivers/gpio/bcm2835_gpio.c
@@ -10,6 +10,9 @@
#include <errno.h>
#include <asm/gpio.h>
#include <asm/io.h>
+#include <fdtdec.h>
+
+DECLARE_GLOBAL_DATA_PTR;
struct bcm2835_gpios {
struct bcm2835_gpio_regs *reg;
@@ -118,9 +121,32 @@ 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,
.priv_auto_alloc_size = sizeof(struct bcm2835_gpios),
