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Commit fa6e2eec authored by Linus Walleij's avatar Linus Walleij
Browse files

ARM: realview: basic device tree implementation 



This implements basic device tree boot support for the RealView
platforms, with a basic device tree for ARM PB1176 as an example.

The implementation is done with a new DT-specific board file
using only pre-existing bindings for the basic IRQ, timer and
serial port drivers. A new compatible type is added to the GIC
for the ARM1176.

This implementation uses the MFD syscon handle from day one to
access the system controller registers, and register the devices
using the SoC bus.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Rob Herring <robh@kernel.org>
Acked-by: default avatarJason Cooper <jason@lakedaemon.net>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent f114040e

arch/arm/mach-realview/Kconfig

+13 −0
Original line number Diff line number Diff line 
menu "RealView platform type"

	depends on ARCH_REALVIEW



config REALVIEW_DT

	bool "Support RealView(R) Device Tree based boot"

	select ARM_GIC

	select MFD_SYSCON

	select POWER_RESET

	select POWER_RESET_VERSATILE

	select POWER_SUPPLY

	select SOC_REALVIEW

	select USE_OF

	help

	  Include support for booting the ARM(R) RealView(R) evaluation

	  boards using a device tree machine description.



config MACH_REALVIEW_EB

	bool "Support RealView(R) Emulation Baseboard"

	select ARM_GIC

arch/arm/mach-realview/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 
#



obj-y					:= core.o

obj-$(CONFIG_REALVIEW_DT)		+= realview-dt.o

obj-$(CONFIG_MACH_REALVIEW_EB)		+= realview_eb.o

obj-$(CONFIG_MACH_REALVIEW_PB11MP)	+= realview_pb11mp.o

obj-$(CONFIG_MACH_REALVIEW_PB1176)	+= realview_pb1176.o

arch/arm/mach-realview/realview-dt.c

0 → 100644
+32 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2014 Linaro Ltd.

 *

 * Author: Linus Walleij <linus.walleij@linaro.org>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2, as

 * published by the Free Software Foundation.

 *

 */

#include <linux/of_platform.h>

#include <asm/mach/arch.h>

#include <asm/hardware/cache-l2x0.h>

#include "core.h"



static const char *realview_dt_platform_compat[] __initconst = {

	"arm,realview-eb",

	"arm,realview-pb1176",

	"arm,realview-pb11mp",

	"arm,realview-pba8",

	"arm,realview-pbx",

	NULL,

};



DT_MACHINE_START(REALVIEW_DT, "ARM RealView Machine (Device Tree Support)")

#ifdef CONFIG_ZONE_DMA

	.dma_zone_size	= SZ_256M,

#endif

	.dt_compat	= realview_dt_platform_compat,

	.l2c_aux_val = 0x0,

	.l2c_aux_mask = ~0x0,

MACHINE_END

drivers/irqchip/irq-gic.c

+2 −0
Original line number Diff line number Diff line
@@ -1041,6 +1041,8 @@ gic_of_init(struct device_node *node, struct device_node *parent) 
	return 0;

}

IRQCHIP_DECLARE(gic_400, "arm,gic-400", gic_of_init);

IRQCHIP_DECLARE(arm11mp_gic, "arm,arm11mp-gic", gic_of_init);

IRQCHIP_DECLARE(arm1176jzf_dc_gic, "arm,arm1176jzf-devchip-gic", gic_of_init);

IRQCHIP_DECLARE(cortex_a15_gic, "arm,cortex-a15-gic", gic_of_init);

IRQCHIP_DECLARE(cortex_a9_gic, "arm,cortex-a9-gic", gic_of_init);

IRQCHIP_DECLARE(cortex_a7_gic, "arm,cortex-a7-gic", gic_of_init);