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arm: mvebu: x530: Enable watchdog in SPL and U-Boot

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Enable the hardware watchdog to guard against system lock ups when
running in the SPL or U-Boot. Stop the watchdog just before booting so
that the OS can re-enable it if needed.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Chris Packham 2019-02-18 10:30:54 +13:00 committed by Stefan Roese
parent 8e427ba351
commit 7ceefcbaca
3 changed files with 57 additions and 0 deletions
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4
arch/arm/dts/armada-385-atl-x530-u-boot.dtsi
View file

@ -11,3 +11,7 @@
&uart0 {
u-boot,dm-pre-reloc;
};
&watchdog {
u-boot,dm-pre-reloc;
};

48
board/alliedtelesis/x530/x530.c
View file

@ -7,6 +7,7 @@
#include <command.h>
#include <dm.h>
#include <i2c.h>
#include <wdt.h>
#include <asm/gpio.h>
#include <linux/mbus.h>
#include <linux/io.h>
@ -24,6 +25,10 @@ DECLARE_GLOBAL_DATA_PTR;
#define CONFIG_NVS_LOCATION 0xf4800000
#define CONFIG_NVS_SIZE (512 << 10)
#ifdef CONFIG_WATCHDOG
static struct udevice *watchdog_dev;
#endif
static struct serdes_map board_serdes_map[] = {
{PEX0, SERDES_SPEED_5_GBPS, PEX_ROOT_COMPLEX_X1, 0, 0},
{DEFAULT_SERDES, SERDES_SPEED_5_GBPS, SERDES_DEFAULT_MODE, 0, 0},
@ -75,6 +80,10 @@ struct mv_ddr_topology_map *mv_ddr_topology_map_get(void)
int board_early_init_f(void)
{
#ifdef CONFIG_WATCHDOG
watchdog_dev = NULL;
#endif
/* Configure MPP */
writel(0x00001111, MVEBU_MPP_BASE + 0x00);
writel(0x00000000, MVEBU_MPP_BASE + 0x04);
@ -88,6 +97,17 @@ int board_early_init_f(void)
return 0;
}
void spl_board_init(void)
{
#ifdef CONFIG_WATCHDOG
int ret;
ret = uclass_get_device(UCLASS_WDT, 0, &watchdog_dev);
if (!ret)
wdt_start(watchdog_dev, 120000, 0);
#endif
}
int board_init(void)
{
/* address of boot parameters */
@ -100,9 +120,37 @@ int board_init(void)
/* DEV_READYn is not needed for NVS, ignore it when accessing CS1 */
writel(0x00004001, MVEBU_DEV_BUS_BASE + 0xc8);
spl_board_init();
return 0;
}
void arch_preboot_os(void)
{
#ifdef CONFIG_WATCHDOG
wdt_stop(watchdog_dev);
#endif
}
#ifdef CONFIG_WATCHDOG
void watchdog_reset(void)
{
static ulong next_reset = 0;
ulong now;
if (!watchdog_dev)
return;
now = timer_get_us();
/* Do not reset the watchdog too often */
if (now > next_reset) {
wdt_reset(watchdog_dev);
next_reset = now + 1000;
}
}
#endif
static int led_7seg_init(unsigned int segments)
{
int node;

5
configs/x530_defconfig
View file

@ -19,6 +19,8 @@ CONFIG_SILENT_CONSOLE=y
CONFIG_SILENT_U_BOOT_ONLY=y
CONFIG_SILENT_CONSOLE_UPDATE_ON_RELOC=y
CONFIG_MISC_INIT_R=y
CONFIG_SPL_BOARD_INIT=y
CONFIG_SPL_WATCHDOG_SUPPORT=y
CONFIG_CMD_MEMINFO=y
# CONFIG_CMD_FLASH is not set
CONFIG_CMD_GPIO=y
@ -72,3 +74,6 @@ CONFIG_USB_STORAGE=y
CONFIG_USB_HOST_ETHER=y
CONFIG_USB_ETHER_ASIX=y
CONFIG_USB_ETHER_ASIX88179=y
CONFIG_WATCHDOG=y
CONFIG_WDT=y
CONFIG_WDT_ORION=y