linux-doc.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: "Václav Kubernát" <kubernat@cesnet.cz>
To: Jean Delvare <jdelvare@suse.com>,
	Guenter Roeck <linux@roeck-us.net>,
	Jonathan Corbet <corbet@lwn.net>,
	linux-hwmon@vger.kernel.org, linux-doc@vger.kernel.org,
	linux-kernel@vger.kernel.org
Cc: "Václav Kubernát" <kubernat@cesnet.cz>
Subject: [PATCH v5 3/5] hwmon: (max31790) Show 0 RPM/fault when input disabled
Date: Wed, 12 May 2021 03:30:49 +0200	[thread overview]
Message-ID: <20210512013052.903297-3-kubernat@cesnet.cz> (raw)
In-Reply-To: <20210512013052.903297-1-kubernat@cesnet.cz>

When fan speed input is disabled, it makes no sense to show values in
fan*_input and fan*_fault.

Signed-off-by: Václav Kubernát <kubernat@cesnet.cz>
---
 drivers/hwmon/max31790.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/hwmon/max31790.c b/drivers/hwmon/max31790.c
index 5d4c551df010..6e0ffbcf0d28 100644
--- a/drivers/hwmon/max31790.c
+++ b/drivers/hwmon/max31790.c
@@ -165,6 +165,9 @@ static int max31790_read_fan(struct device *dev, u32 attr, int channel,
 
 	switch (attr) {
 	case hwmon_fan_input:
+		if (!(data->fan_config[channel] & MAX31790_FAN_CFG_TACH_INPUT_EN))
+			return -ENODATA;
+
 		tach = read_reg_word(regmap, MAX31790_REG_TACH_COUNT(channel));
 		if (tach < 0)
 			return tach;
@@ -179,6 +182,11 @@ static int max31790_read_fan(struct device *dev, u32 attr, int channel,
 		*val = RPM_FROM_REG(tach, get_tach_period(data->fan_dynamics[channel]));
 		return 0;
 	case hwmon_fan_fault:
+		if (!(data->fan_config[channel] & MAX31790_FAN_CFG_TACH_INPUT_EN)) {
+			*val = 0;
+			return 0;
+		}
+
 		if (channel > 6)
 			fault = read_reg_byte(regmap, MAX31790_REG_FAN_FAULT_STATUS2);
 		else
-- 
2.31.1


  parent reply	other threads:[~2021-05-12  1:31 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-12  1:30 [PATCH v5 1/5] hwmon: (max31790) Rework to use regmap Václav Kubernát
2021-05-12  1:30 ` [PATCH v5 2/5] hwmon: (max31790) Fix and split pwm*_enable Václav Kubernát
2021-05-12  1:32   ` Václav Kubernát
2021-05-18 14:59     ` Guenter Roeck
2021-05-19 23:11   ` Guenter Roeck
2021-05-12  1:30 ` Václav Kubernát [this message]
2021-05-12  1:30 ` [PATCH v5 4/5] hwmon: (max31790) Allow setting fan*_div Václav Kubernát
2021-05-12  1:30 ` [PATCH v5 5/5] hwmon: (max31790) Update documentation Václav Kubernát
2021-05-19 19:00 ` [PATCH v5 1/5] hwmon: (max31790) Rework to use regmap Guenter Roeck
2021-05-20  5:12 ` Guenter Roeck

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210512013052.903297-3-kubernat@cesnet.cz \
    --to=kubernat@cesnet.cz \
    --cc=corbet@lwn.net \
    --cc=jdelvare@suse.com \
    --cc=linux-doc@vger.kernel.org \
    --cc=linux-hwmon@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux@roeck-us.net \
    --subject='Re: [PATCH v5 3/5] hwmon: (max31790) Show 0 RPM/fault when input disabled' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).