Commit ddcfe525 authored by Chen Feng's avatar Chen Feng Committed by Ionela Voinescu
Browse files

reset: hisi-reboot: adb reboot bootloader


Signed-off-by: default avatarChen Feng <puck.chen@hisilicon.com>
parent 06cb2665
......@@ -8,23 +8,61 @@
* Author: Haojian Zhuang <haojian.zhuang@linaro.org>
*/
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/mfd/syscon.h>
#include <linux/notifier.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/regmap.h>
#include <asm/system_misc.h>
#include <asm/proc-fns.h>
static void __iomem *base;
static u32 reboot_offset;
static struct regmap *pmu_regmap;
static struct regmap *sctrl_regmap;
#define REBOOT_REASON_BOOTLOADER (0x01)
#define REBOOT_REASON_COLDBOOT (0x00)
#define DDR_BYPASS BIT(31)
#define RST_FLAG_MASK GENMASK(7, 0)
#define PMU_HRST_OFFSET ((0x101) << 2)
#define SCPEREN1_OFFSET (0x170)
static int hisi_restart_handler(struct notifier_block *this,
unsigned long mode, void *cmd)
{
writel_relaxed(0xdeadbeef, base + reboot_offset);
int ret;
char reboot_reason;
if (!cmd || !strcmp(cmd, "bootloader"))
reboot_reason = REBOOT_REASON_BOOTLOADER;
else
reboot_reason = REBOOT_REASON_COLDBOOT;
if (base) {
writel_relaxed(0xdeadbeef, base + reboot_offset);
} else {
ret = regmap_update_bits(pmu_regmap, PMU_HRST_OFFSET,
RST_FLAG_MASK, reboot_reason);
if (ret)
return ret;
ret = regmap_write(sctrl_regmap, SCPEREN1_OFFSET, DDR_BYPASS);
if (ret)
return ret;
ret = regmap_write(sctrl_regmap, reboot_offset, 0xdeadbeef);
if (ret)
return ret;
}
while (1)
cpu_do_idle();
......@@ -44,8 +82,17 @@ static int hisi_reboot_probe(struct platform_device *pdev)
base = of_iomap(np, 0);
if (!base) {
WARN(1, "failed to map base address");
return -ENODEV;
pmu_regmap = syscon_regmap_lookup_by_phandle(np, "pmu-regmap");
if (!pmu_regmap) {
WARN(1, "failed to regmap pmu address");
return -ENODEV;
}
sctrl_regmap = syscon_regmap_lookup_by_phandle(np, "sctrl-regmap");
if (!sctrl_regmap) {
WARN(1, "failed to regmap sctrl address");
return -ENODEV;
}
}
if (of_property_read_u32(np, "reboot-offset", &reboot_offset) < 0) {
......@@ -61,11 +108,13 @@ static int hisi_reboot_probe(struct platform_device *pdev)
iounmap(base);
}
arm_pm_restart = NULL;
return err;
}
static const struct of_device_id hisi_reboot_of_match[] = {
{ .compatible = "hisilicon,sysctrl" },
{ .compatible = "hisilicon,hi3660-reboot" },
{}
};
MODULE_DEVICE_TABLE(of, hisi_reboot_of_match);
......
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