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thermal: amlogic: Add hwmon support

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Many monitoring tools read the CPU temperature using the hwmon
interface. Expose the thermal sensors on Amlogic boards as hwmon
devices.

Without this lm_sensors' "sensors" tool does not find any temperature
sensors. Now it prints:
  cpu_thermal-virtual-0
  Adapter: Virtual device
  temp1:        +44.7 C  (crit = +110.0 C)

  ddr_thermal-virtual-0
  Adapter: Virtual device
  temp1:        +45.9 C  (crit = +110.0 C)

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20201115190658.631578-1-martin.blumenstingl@googlemail.com
This commit is contained in:
Martin Blumenstingl 2020-11-15 20:06:58 +01:00 committed by Daniel Lezcano
parent e78acf7efe
commit cb68a8580e
1 changed files with 4 additions and 0 deletions
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4
drivers/thermal/amlogic_thermal.c
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@ -29,6 +29,7 @@
#include <linux/thermal.h>
#include "thermal_core.h"
#include "thermal_hwmon.h"
#define TSENSOR_CFG_REG1 0x4
#define TSENSOR_CFG_REG1_RSET_VBG BIT(12)
@ -287,6 +288,9 @@ static int amlogic_thermal_probe(struct platform_device *pdev)
return ret;
}
if (devm_thermal_add_hwmon_sysfs(pdata->tzd))
dev_warn(&pdev->dev, "Failed to add hwmon sysfs attributes\n");
ret = amlogic_thermal_initialize(pdata);
if (ret)
return ret;