linux-kernel - [PATCH] watchdog: aspeed_wdt: Reorder output signal register configuration

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Date:   Fri, 19 Aug 2022 17:49:05 +0800
From:   Chin-Ting Kuo <chin-ting_kuo@...eedtech.com>
To:     <wim@...ux-watchdog.org>, <linux@...ck-us.net>, <joel@....id.au>,
        <andrew@...id.au>, <BMC-SW@...eedtech.com>,
        <linux-watchdog@...r.kernel.org>, <linux-aspeed@...ts.ozlabs.org>,
        <linux-kernel@...r.kernel.org>, <openbmc@...ts.ozlabs.org>,
        <Bonnie_Lo@...ynn.com>
Subject: [PATCH] watchdog: aspeed_wdt: Reorder output signal register configuration

If the output driving type is push-pull mode, the output
polarity should be selected in advance. Otherwise, an unexpected
value will be output at the moment of changing to push-pull mode.
Thus, output polarity, WDT18[31], must be configured before
changing driving type, WDT18[30].

Signed-off-by: Chin-Ting Kuo <chin-ting_kuo@...eedtech.com>
---
 drivers/watchdog/aspeed_wdt.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/watchdog/aspeed_wdt.c b/drivers/watchdog/aspeed_wdt.c
index 436571b6fc79..a03e4ff812a2 100644
--- a/drivers/watchdog/aspeed_wdt.c
+++ b/drivers/watchdog/aspeed_wdt.c
@@ -325,18 +325,18 @@ static int aspeed_wdt_probe(struct platform_device *pdev)
 		u32 reg = readl(wdt->base + WDT_RESET_WIDTH);
 
 		reg &= config->ext_pulse_width_mask;
-		if (of_property_read_bool(np, "aspeed,ext-push-pull"))
-			reg |= WDT_PUSH_PULL_MAGIC;
+		if (of_property_read_bool(np, "aspeed,ext-active-high"))
+			reg |= WDT_ACTIVE_HIGH_MAGIC;
 		else
-			reg |= WDT_OPEN_DRAIN_MAGIC;
+			reg |= WDT_ACTIVE_LOW_MAGIC;
 
 		writel(reg, wdt->base + WDT_RESET_WIDTH);
 
 		reg &= config->ext_pulse_width_mask;
-		if (of_property_read_bool(np, "aspeed,ext-active-high"))
-			reg |= WDT_ACTIVE_HIGH_MAGIC;
+		if (of_property_read_bool(np, "aspeed,ext-push-pull"))
+			reg |= WDT_PUSH_PULL_MAGIC;
 		else
-			reg |= WDT_ACTIVE_LOW_MAGIC;
+			reg |= WDT_OPEN_DRAIN_MAGIC;
 
 		writel(reg, wdt->base + WDT_RESET_WIDTH);
 	}
-- 
2.25.1