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thermal: imx: fix for dependency on cpu-freq 

The thermal driver is a standalone driver for monitoring SoC temperature
by enabling thermal sensor, so it can be enabled even when CONFIG_CPU_FREQ
is NOT set. So remove the dependency with CPU_THERMAL.

Introduce dummy function of legacy cooling register/unregister to make
thermal driver probe successfully when CONFIG_CPU_FREQ is NOT set.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This commit is contained in:
Anson Huang 2018-11-21 05:49:36 +00:00 committed by Eduardo Valentin
parent 4ab248b3b1
commit c589c56671
2 changed files with 36 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/thermal/Kconfig
View File

@ -212,7 +212,7 @@ config HISI_THERMAL
config IMX_THERMAL
tristate "Temperature sensor driver for Freescale i.MX SoCs"
depends on (ARCH_MXC && CPU_THERMAL) || COMPILE_TEST
depends on ARCH_MXC || COMPILE_TEST
depends on NVMEM || !NVMEM
depends on MFD_SYSCON
depends on OF

47
drivers/thermal/imx_thermal.c
View File

@ -648,15 +648,24 @@ static const struct of_device_id of_imx_thermal_match[] = {
};
MODULE_DEVICE_TABLE(of, of_imx_thermal_match);
#ifdef CONFIG_CPU_FREQ
/*
* Create cooling device in case no #cooling-cells property is available in
* CPU node
*/
static int imx_thermal_register_legacy_cooling(struct imx_thermal_data *data)
{
struct device_node *np = of_get_cpu_node(data->policy->cpu, NULL);
struct device_node *np;
int ret;
data->policy = cpufreq_cpu_get(0);
if (!data->policy) {
pr_debug("%s: CPUFreq policy not found\n", __func__);
return -EPROBE_DEFER;
}
np = of_get_cpu_node(data->policy->cpu, NULL);
if (!np || !of_find_property(np, "#cooling-cells", NULL)) {
data->cdev = cpufreq_cooling_register(data->policy);
if (IS_ERR(data->cdev)) {
@ -669,6 +678,24 @@ static int imx_thermal_register_legacy_cooling(struct imx_thermal_data *data)
return 0;
}
static void imx_thermal_unregister_legacy_cooling(struct imx_thermal_data *data)
{
cpufreq_cooling_unregister(data->cdev);
cpufreq_cpu_put(data->policy);
}
#else
static inline int imx_thermal_register_legacy_cooling(struct imx_thermal_data *data)
{
return 0;
}
static inline void imx_thermal_unregister_legacy_cooling(struct imx_thermal_data *data)
{
}
#endif
static int imx_thermal_probe(struct platform_device *pdev)
{
struct imx_thermal_data *data;
@ -743,14 +770,11 @@ static int imx_thermal_probe(struct platform_device *pdev)
regmap_write(map, data->socdata->sensor_ctrl + REG_SET,
data->socdata->power_down_mask);
data->policy = cpufreq_cpu_get(0);
if (!data->policy) {
pr_debug("%s: CPUFreq policy not found\n", __func__);
return -EPROBE_DEFER;
}
ret = imx_thermal_register_legacy_cooling(data);
if (ret) {
if (ret == -EPROBE_DEFER)
return ret;
dev_err(&pdev->dev,
"failed to register cpufreq cooling device: %d\n", ret);
return ret;
@ -762,7 +786,7 @@ static int imx_thermal_probe(struct platform_device *pdev)
if (ret != -EPROBE_DEFER)
dev_err(&pdev->dev,
"failed to get thermal clk: %d\n", ret);
goto cpufreq_put;
goto legacy_cleanup;
}
/*
@ -775,7 +799,7 @@ static int imx_thermal_probe(struct platform_device *pdev)
ret = clk_prepare_enable(data->thermal_clk);
if (ret) {
dev_err(&pdev->dev, "failed to enable thermal clk: %d\n", ret);
goto cpufreq_put;
goto legacy_cleanup;
}
data->tz = thermal_zone_device_register("imx_thermal_zone",
@ -829,9 +853,8 @@ thermal_zone_unregister:
thermal_zone_device_unregister(data->tz);
clk_disable:
clk_disable_unprepare(data->thermal_clk);
cpufreq_put:
cpufreq_cooling_unregister(data->cdev);
cpufreq_cpu_put(data->policy);
legacy_cleanup:
imx_thermal_unregister_legacy_cooling(data);
return ret;
}