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From: Lars Povlsen <lars.povlsen@microchip.com>
To: Guenter Roeck <linux@roeck-us.net>
Cc: Lars Povlsen <lars.povlsen@microchip.com>,
	Jean Delvare <jdelvare@suse.com>,
	Microchip Linux Driver Support <UNGLinuxDriver@microchip.com>,
	<linux-hwmon@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>
Subject: [PATCH] hwmon: sparx5: Fix initial reading of temperature
Date: Thu, 3 Sep 2020 15:47:04 +0200	[thread overview]
Message-ID: <20200903134704.8949-1-lars.povlsen@microchip.com> (raw)

If the temperature is read before the internal calibration is
completed, the driver returns -EIO. Instead it should return -EAGAIN
to encourage repeating the operation.

Signed-off-by: Lars Povlsen <lars.povlsen@microchip.com>
---
 drivers/hwmon/sparx5-temp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/sparx5-temp.c b/drivers/hwmon/sparx5-temp.c
index 1a2b1026b026..98be48e3a22a 100644
--- a/drivers/hwmon/sparx5-temp.c
+++ b/drivers/hwmon/sparx5-temp.c
@@ -56,7 +56,7 @@ static int s5_read(struct device *dev, enum hwmon_sensor_types type,
 	case hwmon_temp_input:
 		stat = readl_relaxed(hwmon->base + TEMP_STAT);
 		if (!(stat & TEMP_STAT_VALID))
-			return -EIO;
+			return -EAGAIN;
 		value = stat & TEMP_STAT_TEMP;
 		/*
 		 * From register documentation:
--
2.27.0

WARNING: multiple messages have this Message-ID (diff)
From: Lars Povlsen <lars.povlsen@microchip.com>
To: Guenter Roeck <linux@roeck-us.net>
Cc: linux-hwmon@vger.kernel.org, Jean Delvare <jdelvare@suse.com>,
	linux-kernel@vger.kernel.org,
	Microchip Linux Driver Support <UNGLinuxDriver@microchip.com>,
	Lars Povlsen <lars.povlsen@microchip.com>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH] hwmon: sparx5: Fix initial reading of temperature
Date: Thu, 3 Sep 2020 15:47:04 +0200	[thread overview]
Message-ID: <20200903134704.8949-1-lars.povlsen@microchip.com> (raw)

If the temperature is read before the internal calibration is
completed, the driver returns -EIO. Instead it should return -EAGAIN
to encourage repeating the operation.

Signed-off-by: Lars Povlsen <lars.povlsen@microchip.com>
---
 drivers/hwmon/sparx5-temp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/sparx5-temp.c b/drivers/hwmon/sparx5-temp.c
index 1a2b1026b026..98be48e3a22a 100644
--- a/drivers/hwmon/sparx5-temp.c
+++ b/drivers/hwmon/sparx5-temp.c
@@ -56,7 +56,7 @@ static int s5_read(struct device *dev, enum hwmon_sensor_types type,
 	case hwmon_temp_input:
 		stat = readl_relaxed(hwmon->base + TEMP_STAT);
 		if (!(stat & TEMP_STAT_VALID))
-			return -EIO;
+			return -EAGAIN;
 		value = stat & TEMP_STAT_TEMP;
 		/*
 		 * From register documentation:
--
2.27.0

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             reply	other threads:[~2020-09-03 14:56 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-03 13:47 Lars Povlsen [this message]
2020-09-03 13:47 ` [PATCH] hwmon: sparx5: Fix initial reading of temperature Lars Povlsen
2020-09-03 13:52 ` Guenter Roeck
2020-09-03 13:52   ` Guenter Roeck
2020-09-04  8:33   ` Lars Povlsen
2020-09-04  8:33     ` Lars Povlsen
2020-09-04 14:08     ` Guenter Roeck
2020-09-04 14:08       ` Guenter Roeck
2020-09-04 16:40 ` Guenter Roeck
2020-09-04 16:40   ` Guenter Roeck

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