linux-kernel - [PATCH] thermal: mediatek: add sensors-support

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Message-Id: <20210320080646.49615-1-linux@fw-web.de>
Date:   Sat, 20 Mar 2021 09:06:46 +0100
From:   Frank Wunderlich <linux@...web.de>
To:     linux-mediatek@...ts.infradead.org
Cc:     Frank Wunderlich <frank-w@...lic-files.de>,
        Zhang Rui <rui.zhang@...el.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amitk@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] thermal: mediatek: add sensors-support

From: Frank Wunderlich <frank-w@...lic-files.de>

add HWMON-support to mediateks thermanl driver to allow lm-sensors
userspace tools read soc temperature

Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
---
 drivers/thermal/mtk_thermal.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
index 149c6d7fd5a0..e22d77d57458 100644
--- a/drivers/thermal/mtk_thermal.c
+++ b/drivers/thermal/mtk_thermal.c
@@ -23,6 +23,8 @@
 #include <linux/reset.h>
 #include <linux/types.h>
 
+#include "thermal_hwmon.h"
+
 /* AUXADC Registers */
 #define AUXADC_CON1_SET_V	0x008
 #define AUXADC_CON1_CLR_V	0x00c
@@ -983,6 +985,13 @@ static void mtk_thermal_release_periodic_ts(struct mtk_thermal *mt,
 	writel((tmp & (~0x10e)), mt->thermal_base + TEMP_MSRCTL1);
 }
 
+static void mtk_thermal_hwmon_action(void *data)
+{
+	struct thermal_zone_device *zone = data;
+
+	thermal_remove_hwmon_sysfs(zone);
+}
+
 static int mtk_thermal_probe(struct platform_device *pdev)
 {
 	int ret, i, ctrl_id;
@@ -1087,6 +1096,19 @@ static int mtk_thermal_probe(struct platform_device *pdev)
 		goto err_disable_clk_peri_therm;
 	}
 
+#ifdef CONFIG_THERMAL_HWMON
+	tzdev->tzp->no_hwmon = false;
+	ret = thermal_add_hwmon_sysfs(tzdev);
+	if (ret)
+		dev_err(&pdev->dev, "error in thermal_add_hwmon_sysfs");
+
+	ret = devm_add_action(&pdev->dev, mtk_thermal_hwmon_action, tzdev);
+	if (ret) {
+		dev_err(&pdev->dev, "error in devm_add_action");
+		mtk_thermal_hwmon_action(tzdev);
+	}
+#endif
+
 	return 0;
 
 err_disable_clk_peri_therm:
-- 
2.25.1