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From: Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com>
To: <wim@linux-watchdog.org>, <linux@roeck-us.net>, <joel@jms.id.au>,
	<andrew@aj.id.au>, <BMC-SW@aspeedtech.com>,
	<linux-watchdog@vger.kernel.org>, <linux-aspeed@lists.ozlabs.org>,
	<linux-kernel@vger.kernel.org>, <openbmc@lists.ozlabs.org>,
	<Bonnie_Lo@wiwynn.com>
Subject: [PATCH] watchdog: aspeed_wdt: Reorder output signal register configuration
Date: Fri, 19 Aug 2022 17:49:05 +0800	[thread overview]
Message-ID: <20220819094905.1962513-1-chin-ting_kuo@aspeedtech.com> (raw)

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@aspeedtech.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


             reply	other threads:[~2022-08-19  9:50 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-19  9:49 Chin-Ting Kuo [this message]
2022-08-19 11:44 ` [PATCH] watchdog: aspeed_wdt: Reorder output signal register configuration Guenter Roeck
2022-08-24  0:40   ` Bonnie Lo/WYHQ/Wiwynn
2022-08-24  0:46 ` Joel Stanley
2022-08-24  1:56   ` Chin-Ting Kuo

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