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mips: mt76xx: Enable watchdog support

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This patch enables and starts the watchdog on the MT7620 platform.
Currently the WD timeout is configured to 60 seconds.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
[fixed build error due to missing function prototype arch_misc_init]
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
This commit is contained in:
Stefan Roese 2018-10-09 08:59:10 +02:00 • committed by Daniel Schwierzeck
parent b4a6a1bb3f
commit 4ff942b059
3 changed files with 43 additions and 0 deletions
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1
arch/mips/Kconfig
View file

@ -79,6 +79,7 @@ config ARCH_MT7620
select DM_SERIAL select DM_SERIAL
imply DM_SPI imply DM_SPI
imply DM_SPI_FLASH imply DM_SPI_FLASH
select ARCH_MISC_INIT if WATCHDOG
select MIPS_TUNE_24KC select MIPS_TUNE_24KC
select OF_CONTROL select OF_CONTROL
select ROM_EXCEPTION_VECTORS select ROM_EXCEPTION_VECTORS

2
arch/mips/include/asm/u-boot-mips.h
View file

@ -7,4 +7,6 @@ void exc_handler(void);
void except_vec3_generic(void); void except_vec3_generic(void);
void except_vec_ejtag_debug(void); void except_vec_ejtag_debug(void);
int arch_misc_init(void);
#endif /* _U_BOOT_MIPS_H_ */ #endif /* _U_BOOT_MIPS_H_ */

40
arch/mips/mach-mt7620/cpu.c
View file

@ -6,6 +6,7 @@
#include <common.h> #include <common.h>
#include <dm.h> #include <dm.h>
#include <ram.h> #include <ram.h>
#include <wdt.h>
#include <asm/io.h> #include <asm/io.h>
#include <linux/io.h> #include <linux/io.h>
#include <linux/sizes.h> #include <linux/sizes.h>
@ -67,3 +68,42 @@ int print_cpuinfo(void)
return 0; return 0;
} }
#ifdef CONFIG_WATCHDOG
static struct udevice *watchdog_dev;
/* Called by macro WATCHDOG_RESET */
void watchdog_reset(void)
{
static ulong next_reset;
ulong now;
if (!watchdog_dev)
return;
now = get_timer(0);
/* Do not reset the watchdog too often */
if (now > next_reset) {
next_reset = now + 1000; /* reset every 1000ms */
wdt_reset(watchdog_dev);
}
}
int arch_misc_init(void)
{
/* Init watchdog */
if (uclass_get_device_by_seq(UCLASS_WDT, 0, &watchdog_dev)) {
debug("Watchdog: Not found by seq!\n");
if (uclass_get_device(UCLASS_WDT, 0, &watchdog_dev)) {
puts("Watchdog: Not found!\n");
return 0;
}
}
wdt_start(watchdog_dev, 60000, 0); /* 60 seconds */
printf("Watchdog: Started\n");
return 0;
}
#endif