arm: zynq: Wire watchdog internals
Watchdog is only enabled in full u-boot. Adoption for SPL should be also
done because that's the right place where watchdog should be enabled.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/board/xilinx/zynq/board.c b/board/xilinx/zynq/board.c
index fb8eab0..838ac0f 100644
--- a/board/xilinx/zynq/board.c
+++ b/board/xilinx/zynq/board.c
@@ -6,9 +6,11 @@
*/
#include <common.h>
+#include <dm/uclass.h>
#include <fdtdec.h>
#include <fpga.h>
#include <mmc.h>
+#include <wdt.h>
#include <zynqpl.h>
#include <asm/arch/hardware.h>
#include <asm/arch/sys_proto.h>
@@ -33,6 +35,22 @@
static xilinx_desc fpga100 = XILINX_XC7Z100_DESC(0x100);
#endif
+#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_WDT)
+static struct udevice *watchdog_dev;
+#endif
+
+#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_BOARD_EARLY_INIT_F)
+int board_early_init_f(void)
+{
+# if defined(CONFIG_WDT)
+ /* bss is not cleared at time when watchdog_reset() is called */
+ watchdog_dev = NULL;
+# endif
+
+ return 0;
+}
+#endif
+
int board_init(void)
{
#if (defined(CONFIG_FPGA) && !defined(CONFIG_SPL_BUILD)) || \
@@ -75,6 +93,15 @@
}
#endif
+#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_WDT)
+ if (uclass_get_device(UCLASS_WDT, 0, &watchdog_dev)) {
+ puts("Watchdog: Not found!\n");
+ } else {
+ wdt_start(watchdog_dev, 0, 0);
+ puts("Watchdog: Started\n");
+ }
+# endif
+
#if (defined(CONFIG_FPGA) && !defined(CONFIG_SPL_BUILD)) || \
(defined(CONFIG_SPL_FPGA_SUPPORT) && defined(CONFIG_SPL_BUILD))
fpga_init();
@@ -164,3 +191,25 @@
return 0;
}
#endif
+
+#if defined(CONFIG_WATCHDOG)
+/* Called by macro WATCHDOG_RESET */
+void watchdog_reset(void)
+{
+# if !defined(CONFIG_SPL_BUILD)
+ static ulong next_reset;
+ 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
+}
+#endif