[U-Boot] [PATCH 4/4 v5] watchdog: at91sam9_wdt: Remove now superfluous wdt start and reset

[Stefan Roese]

With the new generic function, the scattered other functions are now
removed to be replaced by the generic one. The new version also enables
the configuration of the watchdog timeout via the DT "timeout-sec"
property (if enabled via CONFIG_OF_CONTROL).

The watchdog servicing is enabled via CONFIG_WATCHDOG.

Signed-off-by: Stefan Roese <sr at denx.de>
Cc: Heiko Schocher <hs at denx.de>
Cc: Eugen Hristev <eugen.hristev at microchip.com>
---
v5:
- No change

v4:
- New patch (as this at91 watchdog changes just hit mainline)

 arch/arm/mach-at91/clock.c                    | 45 -------------------
 arch/arm/mach-at91/include/mach/at91_wdt.h    |  2 -
 .../gardena-smart-gateway-at91sam_defconfig   |  2 -
 drivers/watchdog/at91sam9_wdt.c               |  8 ----
 4 files changed, 57 deletions(-)

diff --git a/arch/arm/mach-at91/clock.c b/arch/arm/mach-at91/clock.c
index 1d3df2c09d..8344daeb39 100644
--- a/arch/arm/mach-at91/clock.c
+++ b/arch/arm/mach-at91/clock.c
@@ -14,8 +14,6 @@
 
 #define EN_UPLL_TIMEOUT		500
 
-static struct udevice *watchdog_dev __attribute__((section(".data"))) = NULL;
-
 void at91_periph_clk_enable(int id)
 {
 	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
@@ -123,46 +121,3 @@ void at91_pllicpr_init(u32 icpr)
 
 	writel(icpr, &pmc->pllicpr);
 }
-
-/* 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_early_init_r(void)
-{
-	struct at91_wdt_priv *priv;
-
-	/* 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;
-		}
-	}
-
-	priv = dev_get_priv(watchdog_dev);
-	if (!priv) {
-		printf("Watchdog: priv not available!\n");
-		return 0;
-	}
-
-	wdt_start(watchdog_dev, priv->timeout * 1000, 0);
-	printf("Watchdog: Started\n");
-
-	return 0;
-}
diff --git a/arch/arm/mach-at91/include/mach/at91_wdt.h b/arch/arm/mach-at91/include/mach/at91_wdt.h
index a8fc73b3d1..8ef8e007d7 100644
--- a/arch/arm/mach-at91/include/mach/at91_wdt.h
+++ b/arch/arm/mach-at91/include/mach/at91_wdt.h
@@ -28,7 +28,6 @@ typedef struct at91_wdt {
 struct at91_wdt_priv {
 	void __iomem *regs;
 	u32 regval;
-	u32 timeout;
 };
 
 #endif
@@ -51,6 +50,5 @@ struct at91_wdt_priv {
 
 /* Hardware timeout in seconds */
 #define WDT_MAX_TIMEOUT		16
-#define WDT_DEFAULT_TIMEOUT	2
 
 #endif
diff --git a/configs/gardena-smart-gateway-at91sam_defconfig b/configs/gardena-smart-gateway-at91sam_defconfig
index b395a5a175..956897dc7f 100644
--- a/configs/gardena-smart-gateway-at91sam_defconfig
+++ b/configs/gardena-smart-gateway-at91sam_defconfig
@@ -23,7 +23,6 @@ CONFIG_USE_BOOTARGS=y
 CONFIG_BOOTARGS="console=ttyS0,115200 earlyprintk mtdparts=atmel_nand:256k(bootstrap)ro,768k(uboot)ro,256k(env_redundant),256k(env),512k(dtb),6M(kernel)ro,-(rootfs) rootfstype=ubifs ubi.mtd=6 root=ubi0:rootfs rw"
 CONFIG_SYS_CONSOLE_IS_IN_ENV=y
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
-CONFIG_ARCH_EARLY_INIT_R=y
 CONFIG_SPL_SYS_MALLOC_SIMPLE=y
 CONFIG_SPL_SEPARATE_BSS=y
 # CONFIG_TPL_BANNER_PRINT is not set
@@ -76,7 +75,6 @@ CONFIG_TIMER=y
 CONFIG_SPL_TIMER=y
 CONFIG_ATMEL_PIT_TIMER=y
 # CONFIG_SYS_WHITE_ON_BLACK is not set
-CONFIG_WATCHDOG=y
 CONFIG_WDT=y
 CONFIG_WDT_AT91=y
 # CONFIG_UBIFS_SILENCE_MSG is not set
diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c
index 000769d46d..48433cc158 100644
--- a/drivers/watchdog/at91sam9_wdt.c
+++ b/drivers/watchdog/at91sam9_wdt.c
@@ -107,14 +107,6 @@ static int at91_wdt_probe(struct udevice *dev)
 	if (!priv->regs)
 		return -EINVAL;
 
-#if CONFIG_IS_ENABLED(OF_CONTROL)
-	priv->timeout = dev_read_u32_default(dev, "timeout-sec",
-					     WDT_DEFAULT_TIMEOUT);
-	debug("%s: timeout %d", __func__, priv->timeout);
-#else
-	priv->timeout = WDT_DEFAULT_TIMEOUT;
-#endif
-
 	debug("%s: Probing wdt%u\n", __func__, dev->seq);
 
 	return 0;
-- 
2.21.0