diff options
| author | Jaehoon Chung <jh80.chung@samsung.com> | 2016-08-01 19:38:41 +0900 |
|---|---|---|
| committer | Seung-Woo Kim <sw0312.kim@samsung.com> | 2016-12-14 13:52:09 +0900 |
| commit | e0b987196390ea414f687fd5c7beb1f961a057c2 (patch) | |
| tree | 8b4e8d3b1dada63986048070cad97042d31bf1b2 /arch | |
| parent | 6031f54d4b12dbf19fc4ad60b72d1a386cf4615e (diff) | |
ARM: exynos: pmu: support the reboot download mode
Support the reboot download mode functionality.
It can get from device-treee which INFORM register will be used.
If want to use this functionality, it also needs to implement something
on bootloader side.
Change-Id: Iae42f32d69b84ccdcb39fcfc8bc71f9cc8c42302
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-exynos/pmu.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/pmu.c b/arch/arm/mach-exynos/pmu.c index e812c1c85624..611962478221 100644 --- a/arch/arm/mach-exynos/pmu.c +++ b/arch/arm/mach-exynos/pmu.c @@ -23,6 +23,10 @@ #define PMU_TABLE_END (-1U) +#define REBOOT_MODE_PREFIX 0x12345670 +#define REBOOT_MODE_NONE 0 +#define REBOOT_MODE_DOWNLOAD 1 + struct exynos_pmu_conf { unsigned int offset; u8 val[NUM_SYS_POWERDOWN]; @@ -40,6 +44,7 @@ struct exynos_pmu_data { struct exynos_pmu_context { struct device *dev; const struct exynos_pmu_data *pmu_data; + u32 reboot_inform_reg; }; static void __iomem *pmu_base_addr; @@ -878,6 +883,19 @@ static void exynos5420_pmu_init(void) static int pmu_restart_notify(struct notifier_block *this, unsigned long code, void *unused) { + char *cmd = (char *)unused; + + if (pmu_context->reboot_inform_reg) { + if (cmd && !strncmp(cmd, "download", 8)) { + pmu_raw_writel(REBOOT_MODE_PREFIX | + REBOOT_MODE_DOWNLOAD, + pmu_context->reboot_inform_reg); + } else + pmu_raw_writel(REBOOT_MODE_PREFIX | + REBOOT_MODE_NONE, + pmu_context->reboot_inform_reg); + } + pmu_raw_writel(0x1, EXYNOS_SWRESET); return NOTIFY_DONE; @@ -952,7 +970,9 @@ static int exynos_pmu_probe(struct platform_device *pdev) { const struct of_device_id *match; struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; struct resource *res; + u32 inform_reg; int ret; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -973,6 +993,10 @@ static int exynos_pmu_probe(struct platform_device *pdev) pmu_context->pmu_data = match->data; + ret = of_property_read_u32(np, "reboot-inform", &inform_reg); + if (!ret) + pmu_context->reboot_inform_reg = inform_reg; + if (pmu_context->pmu_data->pmu_init) pmu_context->pmu_data->pmu_init(); |