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ARM: bcm21664: Add board support.

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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: Markus Mayer <markus.mayer@linaro.org>
Signed-off-by: Matt Porter <mporter@linaro.org>
This commit is contained in:
Markus Mayer 2014-03-06 17:18:13 +08:00 committed by Matt Porter
parent 833688f4e4
commit c3ceebd7ca
2 changed files with 82 additions and 2 deletions
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6
arch/arm/mach-bcm/Makefile
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@ -1,5 +1,5 @@
#
# 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

78
arch/arm/mach-bcm/board_bcm21664.c Normal file
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@ -0,0 +1,78 @@
/*
* 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