[PATCH v3 5/6] watchdog: sandbox_wdt: set max_timeout_ms in probe

Add a SANDBOX_WDT_MAX_TIMEOUT_MS define to sandbox asm/state.h
to emulate a hardware-limited maximum timeout.

Report the maximum timeout value to the wdt uclass by setting
max_timeout_ms in the per-device uclass-plat data during
sandbox_wdt_probe().

Signed-off-by: Juuso Rinta <[email protected]>
---
 arch/sandbox/include/asm/state.h |  2 ++
 drivers/watchdog/sandbox_wdt.c   | 11 +++++++++++
 2 files changed, 13 insertions(+)

diff --git a/arch/sandbox/include/asm/state.h b/arch/sandbox/include/asm/state.h
index 9dea0980bfc..742e4f5c6e9 100644
--- a/arch/sandbox/include/asm/state.h
+++ b/arch/sandbox/include/asm/state.h
@@ -38,6 +38,8 @@ struct sandbox_spi_info {
 	struct udevice *emul;
 };
 
+#define SANDBOX_WDT_MAX_TIMEOUT_MS	30000
+
 struct sandbox_wdt_info {
 	unsigned long long counter;
 	uint reset_count;
diff --git a/drivers/watchdog/sandbox_wdt.c b/drivers/watchdog/sandbox_wdt.c
index cd5eadbfd21..9a0cdac232a 100644
--- a/drivers/watchdog/sandbox_wdt.c
+++ b/drivers/watchdog/sandbox_wdt.c
@@ -43,6 +43,16 @@ static int sandbox_wdt_expire_now(struct udevice *dev, ulong flags)
 	return 0;
 }
 
+static int sandbox_wdt_probe(struct udevice *dev)
+{
+	struct wdt_uc_plat *plat = dev_get_uclass_plat(dev);
+
+	/* Store the emulated hardware max timeout in uclass plat data */
+	plat->max_timeout_ms = SANDBOX_WDT_MAX_TIMEOUT_MS;
+
+	return 0;
+}
+
 static const struct wdt_ops sandbox_wdt_ops = {
 	.start = sandbox_wdt_start,
 	.reset = sandbox_wdt_reset,
@@ -59,5 +69,6 @@ U_BOOT_DRIVER(wdt_sandbox) = {
 	.name = "wdt_sandbox",
 	.id = UCLASS_WDT,
 	.of_match = sandbox_wdt_ids,
+	.probe = sandbox_wdt_probe,
 	.ops = &sandbox_wdt_ops,
 };

-- 
2.39.2