From: Nathael Pajani <nathael.pajani@ed3l.fr>
Date: Sun, 30 Jan 2022 03:16:01 +0000 (+0100)
Subject: Update watchdog code to allow use of watchdog as wake-up source
X-Git-Url: http://git.techno-innov.fr/?a=commitdiff_plain;h=52ed3909f57962b814919b3115d71afc62c2e200;p=soft%2Flpc82x%2Fcore

Update watchdog code to allow use of watchdog as wake-up source
---

diff --git a/core/watchdog.c b/core/watchdog.c
index ae3870c..93ffec4 100644
--- a/core/watchdog.c
+++ b/core/watchdog.c
@@ -30,6 +30,7 @@
 
 
 
+
 /***************************************************************************** */
 void watchdog_feed(void)
 {
@@ -66,7 +67,9 @@ uint32_t watchdog_get_timer_val(void)
 	return wdt->timer_value;
 }
 
+
 /* Change the watchdog timer value, if not protected */
+#define LPC_WDT_TIMER_MAX  0xFFFFFF /* This one is the shiffted value, and must not be exported to user */
 void watchdog_set_timer_val(uint32_t nb_clk)
 {
 	struct lpc_watchdog* wdt = LPC_WDT;
@@ -143,10 +146,10 @@ void watchdog_config(const struct wdt_config* wd_conf)
 
 	/* Power wadchdog block before changing it's configuration */
 	subsystem_power(LPC_SYS_AHB_CLK_CTRL_Watchdog, 1);
-	/* Configure the watchdog clock source frequency  */
-	sys_config->WDT_osc_ctrl = LPC_WDT_CLK_DIVIDER(4) | LPC_WDT_FREQSEL_4MHz; /* 1MHz */
 	/* Power ON Watchdog clock */
 	sys_config->powerdown_run_cfg &= ~(LPC_POWER_DOWN_WDT_OSC);
+	/* Configure the watchdog clock source frequency  */
+	sys_config->WDT_osc_ctrl = LPC_WDT_CLK_DIVIDER(4) | LPC_WDT_FREQSEL_4MHz; /* 1MHz */
 
 	/* Configure watchdog timeout for normal operation */
 	wdt->timer_const = ((wd_conf->nb_clk >> 2) & LPC_WDT_TIMER_MAX);
@@ -177,6 +180,9 @@ void watchdog_config(const struct wdt_config* wd_conf)
 		}
 	}
 
+	/* Enable Watchdog as wakeup source from deep sleep and power down modes */
+	enable_intr_wake_source(LPC_WWDT_INT_WAKEUP_EN);
+
 	/* Feed sequence to validate the configuration */
 	watchdog_feed();
 
diff --git a/include/core/watchdog.h b/include/core/watchdog.h
index 8cbf288..de6df1f 100644
--- a/include/core/watchdog.h
+++ b/include/core/watchdog.h
@@ -74,7 +74,9 @@ void watchdog_clear_timeout_flag(void);
 /* Return current watchdog timer value */
 uint32_t watchdog_get_timer_val(void);
 
-/* Change the watchdog timer value, if not protected */
+/* Change the watchdog timer value, if not protected
+ * The change will take effect at the next watchdog feed.
+ */
 void watchdog_set_timer_val(uint32_t nb_clk);
 
 
@@ -140,7 +142,7 @@ struct lpc_watchdog
 };
 #define LPC_WDT         ((struct lpc_watchdog *) LPC_WDT_BASE)
 
-#define LPC_WDT_TIMER_MAX  0xFFFFFF
+#define LPC_WATCHDOG_TIMER_MAX_VAL  0x03FFFFFF
 
 /* Mode register */
 #define LPC_WDT_EN                  (0x01 << 0)