993ad29359
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>
119 lines
3 KiB
Diff
119 lines
3 KiB
Diff
From 26546e5499d98616322fb3472b977e2e86603f3a Mon Sep 17 00:00:00 2001
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From: Jonas Gorski <jogo@openwrt.org>
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Date: Tue, 24 Jun 2014 10:57:51 +0200
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Subject: [PATCH 45/48] MIPS: BCM63XX: add support for loading DTB
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Signed-off-by: Jonas Gorski <jogo@openwrt.org>
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---
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arch/mips/bcm63xx/boards/Kconfig | 4 ++++
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arch/mips/bcm63xx/boards/board_common.c | 34 +++++++++++++++++++++++++++++++
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arch/mips/bcm63xx/prom.c | 6 ++++++
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3 files changed, 44 insertions(+)
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--- a/arch/mips/bcm63xx/boards/Kconfig
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+++ b/arch/mips/bcm63xx/boards/Kconfig
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@@ -1,6 +1,10 @@
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menu "Board support"
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depends on BCM63XX
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+config BOARD_BCM63XX_DT
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+ bool "Device Tree boards (experimential)"
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+ select USE_OF
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+
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config BOARD_BCM963XX
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bool "Generic Broadcom 963xx boards"
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select SSB
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--- a/arch/mips/bcm63xx/boards/board_common.c
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+++ b/arch/mips/bcm63xx/boards/board_common.c
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@@ -10,12 +10,15 @@
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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+#include <linux/of_fdt.h>
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+#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/ssb/ssb.h>
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#include <linux/spi/spi.h>
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#include <asm/addrspace.h>
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#include <asm/bootinfo.h>
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#include <asm/fw/cfe/cfe_api.h>
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+#include <asm/prom.h>
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#include <bcm63xx_board.h>
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#include <bcm63xx_cpu.h>
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#include <bcm63xx_dev_uart.h>
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@@ -127,8 +130,23 @@ void __init board_setup(void)
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/* make sure we're running on expected cpu */
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if (bcm63xx_get_cpu_id() != board.expected_cpu_id)
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panic("unexpected CPU for bcm963xx board");
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+
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+#if CONFIG_OF
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+ if (initial_boot_params)
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+ __dt_setup_arch(initial_boot_params);
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+#endif
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}
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+#if CONFIG_OF
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+void __init device_tree_init(void)
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+{
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+ if (!initial_boot_params)
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+ return;
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+
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+ unflatten_and_copy_device_tree();
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+}
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+#endif
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+
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static struct gpio_led_platform_data bcm63xx_led_data;
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static struct platform_device bcm63xx_gpio_leds = {
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@@ -137,6 +155,13 @@ static struct platform_device bcm63xx_gp
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.dev.platform_data = &bcm63xx_led_data,
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};
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+#if CONFIG_OF
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+static struct of_device_id of_ids[] = {
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+ { /* filled at runtime */ },
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+ { .compatible = "simple-bus" },
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+ { },
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+};
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+#endif
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/*
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* third stage init callback, register all board devices.
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*/
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@@ -144,6 +169,15 @@ int __init board_register_devices(void)
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{
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int usbh_ports = 0;
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+#if CONFIG_OF
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+ if (of_have_populated_dt()) {
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+ snprintf(of_ids[0].compatible, sizeof(of_ids[0].compatible),
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+ "brcm,bcm%x", bcm63xx_get_cpu_id());
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+
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+ of_platform_populate(NULL, of_ids, NULL, NULL);
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+ }
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+#endif
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+
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if (board.has_uart0)
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bcm63xx_uart_register(0);
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--- a/arch/mips/bcm63xx/prom.c
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+++ b/arch/mips/bcm63xx/prom.c
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@@ -8,6 +8,7 @@
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#include <linux/init.h>
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#include <linux/bootmem.h>
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+#include <linux/of_fdt.h>
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#include <linux/smp.h>
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#include <asm/bootinfo.h>
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#include <asm/bmips.h>
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@@ -23,6 +24,11 @@ void __init prom_init(void)
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{
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u32 reg, mask;
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+#if CONFIG_OF
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+ if (fw_passed_dtb)
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+ early_init_dt_verify((void *)fw_passed_dtb);
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+#endif
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+
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bcm63xx_cpu_init();
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/* stop any running watchdog */
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