mirror of https://gitee.com/openkylin/linux.git
55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
/* linux/arch/arm/mach-vt8500/restart.c
|
|
*
|
|
* Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz>
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
#include <asm/io.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
|
|
#define LEGACY_PMC_BASE 0xD8130000
|
|
#define WMT_PRIZM_PMSR_REG 0x60
|
|
|
|
static void __iomem *pmc_base;
|
|
|
|
void wmt_setup_restart(void)
|
|
{
|
|
struct device_node *np;
|
|
|
|
/*
|
|
* Check if Power Mgmt Controller node is present in device tree. If no
|
|
* device tree node, use the legacy PMSR value (valid for all current
|
|
* SoCs).
|
|
*/
|
|
np = of_find_compatible_node(NULL, NULL, "wmt,prizm-pmc");
|
|
if (np) {
|
|
pmc_base = of_iomap(np, 0);
|
|
|
|
if (!pmc_base)
|
|
pr_err("%s:of_iomap(pmc) failed\n", __func__);
|
|
|
|
of_node_put(np);
|
|
} else {
|
|
pmc_base = ioremap(LEGACY_PMC_BASE, 0x1000);
|
|
if (!pmc_base) {
|
|
pr_err("%s:ioremap(rstc) failed\n", __func__);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
void wmt_restart(char mode, const char *cmd)
|
|
{
|
|
if (pmc_base)
|
|
writel(1, pmc_base + WMT_PRIZM_PMSR_REG);
|
|
}
|