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Commit c3ceebd7 authored by Markus Mayer's avatar Markus Mayer Committed by Matt Porter
Browse files

ARM: bcm21664: Add board support. 



Add support for the Broadcom BCM21664 mobile SoC. It has two Cortex-A9
cores like the BCM281xx family of chips. BCM21664 and BCM281xx share
many IP blocks in addition to the ARM cores.

Signed-off-by: default avatarMarkus Mayer <markus.mayer@linaro.org>
Signed-off-by: default avatarMatt Porter <mporter@linaro.org>
parent 833688f4

arch/arm/mach-bcm/Makefile

+4 −2
Original line number Diff line number Diff line 
#

# Copyright (C) 2012-2013 Broadcom Corporation

# Copyright (C) 2012-2014 Broadcom Corporation

#

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

# modify it under the terms of the GNU General Public License as
@@ -10,7 +10,9 @@ 
# of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.



obj-$(CONFIG_ARCH_BCM_MOBILE)	:= board_bcm281xx.o bcm_kona_smc.o bcm_kona_smc_asm.o kona.o

obj-$(CONFIG_ARCH_BCM_MOBILE)	:= board_bcm281xx.o board_bcm21664.o \

				bcm_kona_smc.o bcm_kona_smc_asm.o kona.o



plus_sec := $(call as-instr,.arch_extension sec,+sec)

AFLAGS_bcm_kona_smc_asm.o	:=-Wa,-march=armv7-a$(plus_sec)

obj-$(CONFIG_ARCH_BCM_5301X)	+= bcm_5301x.o

arch/arm/mach-bcm/board_bcm21664.c

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+78 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2014 Broadcom Corporation

 *

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

 * modify it under the terms of the GNU General Public License as

 * published by the Free Software Foundation version 2.

 *

 * This program is distributed "as is" WITHOUT ANY WARRANTY of any

 * kind, whether express or implied; without even the implied warranty

 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */



#include <linux/clocksource.h>

#include <linux/of_address.h>

#include <linux/of_platform.h>



#include <asm/mach/arch.h>



#include "bcm_kona_smc.h"

#include "kona.h"



#define RSTMGR_DT_STRING		"brcm,bcm21664-resetmgr"



#define RSTMGR_REG_WR_ACCESS_OFFSET	0

#define RSTMGR_REG_CHIP_SOFT_RST_OFFSET	4



#define RSTMGR_WR_PASSWORD		0xa5a5

#define RSTMGR_WR_PASSWORD_SHIFT	8

#define RSTMGR_WR_ACCESS_ENABLE		1



static void bcm21664_restart(enum reboot_mode mode, const char *cmd)

{

	void __iomem *base;

	struct device_node *resetmgr;



	resetmgr = of_find_compatible_node(NULL, NULL, RSTMGR_DT_STRING);

	if (!resetmgr) {

		pr_emerg("Couldn't find " RSTMGR_DT_STRING "\n");

		return;

	}

	base = of_iomap(resetmgr, 0);

	if (!base) {

		pr_emerg("Couldn't map " RSTMGR_DT_STRING "\n");

		return;

	}



	/*

	 * A soft reset is triggered by writing a 0 to bit 0 of the soft reset

	 * register. To write to that register we must first write the password

	 * and the enable bit in the write access enable register.

	 */

	writel((RSTMGR_WR_PASSWORD << RSTMGR_WR_PASSWORD_SHIFT) |

		RSTMGR_WR_ACCESS_ENABLE,

		base + RSTMGR_REG_WR_ACCESS_OFFSET);

	writel(0, base + RSTMGR_REG_CHIP_SOFT_RST_OFFSET);



	/* Wait for reset */

	while (1);

}



static void __init bcm21664_init(void)

{

	of_platform_populate(NULL, of_default_bus_match_table, NULL,

		&platform_bus);

	kona_l2_cache_init();

}



static const char * const bcm21664_dt_compat[] = {

	"brcm,bcm21664",

	NULL,

};



DT_MACHINE_START(BCM21664_DT, "BCM21664 Broadcom Application Processor")

	.init_machine = bcm21664_init,

	.restart = bcm21664_restart,

	.dt_compat = bcm21664_dt_compat,

MACHINE_END