linux-kernel - [PATCH 2/2] thermal/drivers/imx: Use the thermal framework for the trip point

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Date:   Wed,  8 Mar 2023 22:48:22 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     daniel.lezcano@...aro.org, rafael@...nel.org
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Amit Kucheria <amitk@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        linux-arm-kernel@...ts.infradead.org (moderated list:ARM/FREESCALE IMX
        / MXC ARM ARCHITECTURE)
Subject: [PATCH 2/2] thermal/drivers/imx: Use the thermal framework for the trip point

The thermal framework provides an API to get the trip related to a
trip point id. We want to consolidate the generic trip points code,
thus preventing the different drivers to deal with the trip points
after they registered them.

The set_trip_temp ops will be changed regarding the above changes but
first we need to rework a bit the different implementation in the
drivers.

The goal is to prevent using the trip id but use a trip point passed
as parameter which will contain all the needed information.

As we don't have the trip point passed as parameter yet, we get the
trip point using the generic trip thermal framewrok APIs and use it to
take exactly the same decisions.

The difference with this change and the previous code is from where we
get the thermal trip point (which is the same).

No functional change intended.

Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
---
 drivers/thermal/imx_thermal.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index 69ed482167f7..e4e82bdf34f1 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -330,26 +330,29 @@ static int imx_change_mode(struct thermal_zone_device *tz,
 	return 0;
 }
 
-static int imx_set_trip_temp(struct thermal_zone_device *tz, int trip,
+static int imx_set_trip_temp(struct thermal_zone_device *tz, int trip_id,
 			     int temp)
 {
 	struct imx_thermal_data *data = thermal_zone_device_priv(tz);
+	struct thermal_trip trip;
 	int ret;
 
 	ret = pm_runtime_resume_and_get(data->dev);
 	if (ret < 0)
 		return ret;
 
+	ret = __thermal_zone_get_trip(tz, trip_id, &trip);
+	if (ret)
+		return ret;
+
 	/* do not allow changing critical threshold */
-	if (trip == IMX_TRIP_CRITICAL)
+	if (trip.type == THERMAL_TRIP_CRITICAL)
 		return -EPERM;
-
+	
 	/* do not allow passive to be set higher than critical */
 	if (temp < 0 || temp > trips[IMX_TRIP_CRITICAL].temperature)
 		return -EINVAL;
 
-	trips[IMX_TRIP_PASSIVE].temperature = temp;
-
 	imx_set_alarm_temp(data, temp);
 
 	pm_runtime_put(data->dev);
-- 
2.34.1