linux-kernel - [PATCH] thermal: of-thermal: support to select governor in dts for thermal zone

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Message-ID: <1546873479-20415-1-git-send-email-yizeng@asrmicro.com>
Date:   Mon, 7 Jan 2019 23:04:39 +0800
From:   Yi Zeng <yizeng@...micro.com>
To:     <rui.zhang@...el.com>, <edubezval@...il.com>,
        <daniel.lezcano@...aro.org>, <linux-pm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     Yi Zeng <yizeng@...micro.com>
Subject: [PATCH] thermal: of-thermal: support to select governor in dts for thermal zone

Add the governor property parsing that defined in thermal zone node
in dts. If define the governor property for one thermal zone, for
example, governor = "step_wise", then parse and register the thermal
zone will find and set the right governor, except the only choice
of default governor.

Signed-off-by: Yi Zeng <yizeng@...micro.com>
---
 drivers/thermal/of-thermal.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
index 4bfdb4a..f9368f4 100644
--- a/drivers/thermal/of-thermal.c
+++ b/drivers/thermal/of-thermal.c
@@ -1024,6 +1024,7 @@ int __init of_parse_thermal_zones(void)
 		struct thermal_zone_params *tzp;
 		int i, mask = 0;
 		u32 prop;
+		const char *name;
 
 		tz = thermal_of_build_thermal_zone(child);
 		if (IS_ERR(tz)) {
@@ -1049,6 +1050,10 @@ int __init of_parse_thermal_zones(void)
 		if (!of_property_read_u32(child, "sustainable-power", &prop))
 			tzp->sustainable_power = prop;
 
+		if (!of_property_read_string(child, "governor", &name))
+			strncpy(tzp->governor_name, name,
+				THERMAL_NAME_LENGTH);
+
 		for (i = 0; i < tz->ntrips; i++)
 			mask |= 1 << i;
 
-- 
1.9.1