linux-kernel - [PATCH] aspeed: watchdog: Add status function

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Date:   Mon, 26 Mar 2018 16:17:08 -0500
From:   Eddie James <eajames@...ux.vnet.ibm.com>
To:     linux-watchdog@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, linux@...ck-us.net,
        wim@...ux-watchdog.org, joel@....id.au, openbmc@...ts.ozlabs.org,
        Eddie James <eajames@...ux.vnet.ibm.com>
Subject: [PATCH] aspeed: watchdog: Add status function

Populate the status watchdog operation to return the "timeout status"
register of the ASPEED watchdog.

Signed-off-by: Eddie James <eajames@...ux.vnet.ibm.com>
---
 drivers/watchdog/aspeed_wdt.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/watchdog/aspeed_wdt.c b/drivers/watchdog/aspeed_wdt.c
index a5b8eb2..d6dd5c9 100644
--- a/drivers/watchdog/aspeed_wdt.c
+++ b/drivers/watchdog/aspeed_wdt.c
@@ -55,6 +55,7 @@ struct aspeed_wdt_config {
 #define   WDT_CTRL_WDT_INTR		BIT(2)
 #define   WDT_CTRL_RESET_SYSTEM		BIT(1)
 #define   WDT_CTRL_ENABLE		BIT(0)
+#define WDT_TIMEOUT_STATUS	0x10
 
 /*
  * WDT_RESET_WIDTH controls the characteristics of the external pulse (if
@@ -138,6 +139,13 @@ static int aspeed_wdt_ping(struct watchdog_device *wdd)
 	return 0;
 }
 
+static unsigned int aspeed_wdt_status(struct watchdog_device *wdd)
+{
+	struct aspeed_wdt *wdt = to_aspeed_wdt(wdd);
+
+	return readl(wdt->base + WDT_TIMEOUT_STATUS);
+}
+
 static int aspeed_wdt_set_timeout(struct watchdog_device *wdd,
 				  unsigned int timeout)
 {
@@ -171,6 +179,7 @@ static int aspeed_wdt_restart(struct watchdog_device *wdd,
 	.start		= aspeed_wdt_start,
 	.stop		= aspeed_wdt_stop,
 	.ping		= aspeed_wdt_ping,
+	.status		= aspeed_wdt_status,
 	.set_timeout	= aspeed_wdt_set_timeout,
 	.restart	= aspeed_wdt_restart,
 	.owner		= THIS_MODULE,
-- 
1.8.3.1