linux-kernel - [PATCH 2/4] hwmon: (core) Add support for humidity min/max alarm

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Message-Id: <20231020-topic-chipcap2-v1-2-087e21d4b1ed@gmail.com>
Date:   Wed, 08 Nov 2023 13:29:57 +0100
From:   Javier Carrasco <javier.carrasco.cruz@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Jonathan Corbet <corbet@....net>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     Rob Herring <robh@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org,
        linux-doc@...r.kernel.org,
        Javier Carrasco <javier.carrasco.cruz@...il.com>
Subject: [PATCH 2/4] hwmon: (core) Add support for humidity min/max alarm

Add min_alarm and max_alarm attributes for humidityX to support devices
that can generate these alarms.
Such attributes already exist for other magnitudes such as tempX.

Tested with a ChipCap 2 temperature-humidity sensor.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@...il.com>
---
 drivers/hwmon/hwmon.c | 2 ++
 include/linux/hwmon.h | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c
index c7dd3f5b2bd5..7f92984c37d9 100644
--- a/drivers/hwmon/hwmon.c
+++ b/drivers/hwmon/hwmon.c
@@ -579,8 +579,10 @@ static const char * const hwmon_humidity_attr_templates[] = {
 	[hwmon_humidity_input] = "humidity%d_input",
 	[hwmon_humidity_label] = "humidity%d_label",
 	[hwmon_humidity_min] = "humidity%d_min",
+	[hwmon_humidity_min_alarm] = "humidity%d_min_alarm",
 	[hwmon_humidity_min_hyst] = "humidity%d_min_hyst",
 	[hwmon_humidity_max] = "humidity%d_max",
+	[hwmon_humidity_max_alarm] = "humidity%d_max_alarm",
 	[hwmon_humidity_max_hyst] = "humidity%d_max_hyst",
 	[hwmon_humidity_alarm] = "humidity%d_alarm",
 	[hwmon_humidity_fault] = "humidity%d_fault",
diff --git a/include/linux/hwmon.h b/include/linux/hwmon.h
index 8cd6a6b33593..154de35e34ac 100644
--- a/include/linux/hwmon.h
+++ b/include/linux/hwmon.h
@@ -286,8 +286,10 @@ enum hwmon_humidity_attributes {
 	hwmon_humidity_input,
 	hwmon_humidity_label,
 	hwmon_humidity_min,
+	hwmon_humidity_min_alarm,
 	hwmon_humidity_min_hyst,
 	hwmon_humidity_max,
+	hwmon_humidity_max_alarm,
 	hwmon_humidity_max_hyst,
 	hwmon_humidity_alarm,
 	hwmon_humidity_fault,
@@ -299,8 +301,10 @@ enum hwmon_humidity_attributes {
 #define HWMON_H_INPUT			BIT(hwmon_humidity_input)
 #define HWMON_H_LABEL			BIT(hwmon_humidity_label)
 #define HWMON_H_MIN			BIT(hwmon_humidity_min)
+#define HWMON_H_MIN_ALARM		BIT(hwmon_humidity_min_alarm)
 #define HWMON_H_MIN_HYST		BIT(hwmon_humidity_min_hyst)
 #define HWMON_H_MAX			BIT(hwmon_humidity_max)
+#define HWMON_H_MAX_ALARM		BIT(hwmon_humidity_max_alarm)
 #define HWMON_H_MAX_HYST		BIT(hwmon_humidity_max_hyst)
 #define HWMON_H_ALARM			BIT(hwmon_humidity_alarm)
 #define HWMON_H_FAULT			BIT(hwmon_humidity_fault)

-- 
2.39.2