From 4d3d50f607b20b309f54b988c4b67cd6dd27b6d6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= <linux@weissschuh.net>
Date: Tue, 28 Sep 2021 08:57:35 +0200
Subject: [PATCH] watchdog: sp5100_tco: Add support for get_timeleft
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Git-commit: 4d3d50f607b20b309f54b988c4b67cd6dd27b6d6
Patch-mainline: v5.16-rc1
References: bsc#1199260
Tested on a Gigabyte X570 I AORUS PRO WIFI.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20210928065735.548966-1-linux@weissschuh.net
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/watchdog/sp5100_tco.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/watchdog/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c
index a730ecbf78cd..dd9a744f82f8 100644
--- a/drivers/watchdog/sp5100_tco.c
+++ b/drivers/watchdog/sp5100_tco.c
@@ -10,6 +10,7 @@
* https://www.kernelconcepts.de
*
* See AMD Publication 43009 "AMD SB700/710/750 Register Reference Guide",
+ * AMD Publication 44413 "AMD SP5100 Register Reference Guide"
* AMD Publication 45482 "AMD SB800-Series Southbridges Register
* Reference Guide"
* AMD Publication 48751 "BIOS and Kernel Developer’s Guide (BKDG)
@@ -144,6 +145,13 @@ static int tco_timer_set_timeout(struct watchdog_device *wdd,
return 0;
}
+static unsigned int tco_timer_get_timeleft(struct watchdog_device *wdd)
+{
+ struct sp5100_tco *tco = watchdog_get_drvdata(wdd);
+
+ return readl(SP5100_WDT_COUNT(tco->tcobase));
+}
+
static u8 sp5100_tco_read_pm_reg8(u8 index)
{
outb(index, SP5100_IO_PM_INDEX_REG);
@@ -386,6 +394,7 @@ static const struct watchdog_ops sp5100_tco_wdt_ops = {
.stop = tco_timer_stop,
.ping = tco_timer_ping,
.set_timeout = tco_timer_set_timeout,
+ .get_timeleft = tco_timer_get_timeleft,
};
static int sp5100_tco_probe(struct platform_device *pdev)
--
2.35.3