openwrtv3/target/linux/brcm63xx/patches-4.4/367-MIPS-BCM63XX-add-support-for-loading-DTB.patch
Daniel Gimpelevich 993ad29359 kernel: Backport pending appended DTB handling patches
Backport patches from upstream Linux kernel which are making the
kernel stores the appended dtb not in the same resisters as defined in
the UHI specification, use a separate variable on MIPS.

Signed-off-by: Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>
[some modifications]
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2016-09-12 22:36:55 +02:00

119 lines
3 KiB
Diff

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
@@ -10,12 +10,15 @@
#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 <linux/spi/spi.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>
@@ -127,8 +130,23 @@ 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 = {
@@ -137,6 +155,13 @@ 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.
*/
@@ -144,6 +169,15 @@ 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 */