OpenWrt – Rev 4
?pathlinks?
From 26546e5499d98616322fb3472b977e2e86603f3a Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jogo@openwrt.org>
Date: Tue, 24 Jun 2014 10:57:51 +0200
Subject: [PATCH 45/48] MIPS: BCM63XX: add support for loading DTB
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
---
arch/mips/bcm63xx/boards/Kconfig | 4 ++++
arch/mips/bcm63xx/boards/board_common.c | 34 +++++++++++++++++++++++++++++++
arch/mips/bcm63xx/prom.c | 6 ++++++
3 files changed, 44 insertions(+)
--- a/arch/mips/bcm63xx/boards/Kconfig
+++ b/arch/mips/bcm63xx/boards/Kconfig
@@ -1,6 +1,10 @@
menu "Board support"
depends on BCM63XX
+config BOARD_BCM63XX_DT
+ bool "Device Tree boards (experimential)"
+ select USE_OF
+
config BOARD_BCM963XX
bool "Generic Broadcom 963xx boards"
select SSB
--- a/arch/mips/bcm63xx/boards/board_common.c
+++ b/arch/mips/bcm63xx/boards/board_common.c
@@ -10,11 +10,14 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/string.h>
+#include <linux/of_fdt.h>
+#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/ssb/ssb.h>
#include <asm/addrspace.h>
#include <asm/bootinfo.h>
#include <asm/fw/cfe/cfe_api.h>
+#include <asm/prom.h>
#include <bcm63xx_board.h>
#include <bcm63xx_cpu.h>
#include <bcm63xx_dev_uart.h>
@@ -126,8 +129,23 @@ void __init board_setup(void)
/* make sure we're running on expected cpu */
if (bcm63xx_get_cpu_id() != board.expected_cpu_id)
panic("unexpected CPU for bcm963xx board");
+
+#if CONFIG_OF
+ if (initial_boot_params)
+ __dt_setup_arch(initial_boot_params);
+#endif
}
+#if CONFIG_OF
+void __init device_tree_init(void)
+{
+ if (!initial_boot_params)
+ return;
+
+ unflatten_and_copy_device_tree();
+}
+#endif
+
static struct gpio_led_platform_data bcm63xx_led_data;
static struct platform_device bcm63xx_gpio_leds = {
@@ -136,6 +154,13 @@ static struct platform_device bcm63xx_gp
.dev.platform_data = &bcm63xx_led_data,
};
+#if CONFIG_OF
+static struct of_device_id of_ids[] = {
+ { /* filled at runtime */ },
+ { .compatible = "simple-bus" },
+ { },
+};
+#endif
/*
* third stage init callback, register all board devices.
*/
@@ -143,6 +168,15 @@ int __init board_register_devices(void)
{
int usbh_ports = 0;
+#if CONFIG_OF
+ if (of_have_populated_dt()) {
+ snprintf(of_ids[0].compatible, sizeof(of_ids[0].compatible),
+ "brcm,bcm%x", bcm63xx_get_cpu_id());
+
+ of_platform_populate(NULL, of_ids, NULL, NULL);
+ }
+#endif
+
if (board.has_uart0)
bcm63xx_uart_register(0);
--- a/arch/mips/bcm63xx/prom.c
+++ b/arch/mips/bcm63xx/prom.c
@@ -8,6 +8,7 @@
#include <linux/init.h>
#include <linux/bootmem.h>
+#include <linux/of_fdt.h>
#include <linux/smp.h>
#include <asm/bootinfo.h>
#include <asm/bmips.h>
@@ -23,6 +24,11 @@ void __init prom_init(void)
{
u32 reg, mask;
+#if CONFIG_OF
+ if (fw_passed_dtb)
+ early_init_dt_verify((void *)fw_passed_dtb);
+#endif
+
bcm63xx_cpu_init();
/* stop any running watchdog */