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| author | Alexander Shiyan <eagle.alexander923@gmail.com> | 2022-06-09 12:19:46 +0300 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2022-06-14 10:41:50 +0200 |
| commit | 5a4d742347441327951981ca8d803091d2f4643d (patch) | |
| tree | 3261273441f56648c9b4f981f2331fb047496742 /arch/arm/mach-omap/omap_generic.c | |
| parent | 11a1f28cbf22f662665681b389a428db1e35c719 (diff) | |
| download | barebox-5a4d742347441327951981ca8d803091d2f4643d.tar.gz barebox-5a4d742347441327951981ca8d803091d2f4643d.tar.xz | |
ARM: OMAP: Rework watchdog code
This patch introduces the omap_watchdog_disable() function,
since the WDT core is the same for different OMAP variants,
it can be used for all supported SOCs.
Signed-off-by: Alexander Shiyan <eagle.alexander923@gmail.com>
Link: https://lore.barebox.org/20220609091946.20028-1-eagle.alexander923@gmail.com
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-omap/omap_generic.c')
| -rw-r--r-- | arch/arm/mach-omap/omap_generic.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/mach-omap/omap_generic.c b/arch/arm/mach-omap/omap_generic.c index a1c0aeb595..6bb26a6ef0 100644 --- a/arch/arm/mach-omap/omap_generic.c +++ b/arch/arm/mach-omap/omap_generic.c @@ -70,6 +70,24 @@ void __noreturn omap_start_barebox(void *barebox) hang(); } +#define OMAP_WDT_WWPS 0x34 +#define OMAP_WDT_WSPR 0x48 +#define WDT_DISABLE_CODE1 0xaaaa +#define WDT_DISABLE_CODE2 0x5555 + +void omap_watchdog_disable(const void __iomem *wdt) +{ + /* WDT is already running when the bootloader gets control + * Disable it to avoid "random" resets + */ + __raw_writel(WDT_DISABLE_CODE1, wdt + OMAP_WDT_WSPR); + + do { + } while (__raw_readl(wdt + OMAP_WDT_WWPS)); + + __raw_writel(WDT_DISABLE_CODE2, wdt + OMAP_WDT_WSPR); +} + #ifdef CONFIG_BOOTM static int do_bootm_omap_barebox(struct image_data *data) { |