tree 23cb011d97213ef899cee81ec3201460c0c99209
parent 7dd6443b88a52cb17d925bbe0f316d6a0374a703
author Howard Chiu <howard.chiu@quantatw.com> 1638429284 +0800
committer Potin Lai <potin.lai@quantatw.com> 1651214612 +0800

Fansensor: Support ast26xx pwm/tach

Add new fantype for ast26xx tach driver.
Use pwm-fan driver to setup ast26xx pwm driver for easier usage.
User must define pwm-fan node in dts as below

pwm-fanX {
	compatible = "pwm-fan";
	.......
};
refer Documentation/devicetree/bindings/hwmon/pwm-fan.txt for details

and Connector in EM configuration
"Connector": {
    "Pwm": X,
    ......
}

where X is integer

Tested: On Facebook Bletchley (ast26xx) Platform with 1 fan

root@bletchley:/sys/class/leds# busctl set-property xyz.openbmc_project.FanSensor /xyz/openbmc_project/sensors/fan_pwm/Pwm_1 xyz.openbmc_project.Sensor.Value Value d 20
root@bletchley:/sys/class/leds# busctl introspect xyz.openbmc_project.FanSensor /xyz/openbmc_project/sensors/fan_tach/FAN0_TACH_IL xyz.openbmc_project.Sensor.Value
NAME                             TYPE      SIGNATURE RESULT/VALUE                             FLAGS
.MaxValue                        property  d         25000                                    emits-change
.MinValue                        property  d         0                                        emits-change
.Unit                            property  s         "xyz.openbmc_project.Sensor.Value.Uni... emits-change
.Value                           property  d         3189                                     emits-change writable
root@bletchley:/sys/class/leds# busctl introspect xyz.openbmc_project.FanSensor /xyz/openbmc_project/sensors/fan_tach/FAN0_TACH_OL xyz.openbmc_project.Sensor.Value
NAME                             TYPE      SIGNATURE RESULT/VALUE                             FLAGS
.MaxValue                        property  d         25000                                    emits-change
.MinValue                        property  d         0                                        emits-change
.Unit                            property  s         "xyz.openbmc_project.Sensor.Value.Uni... emits-change
.Value                           property  d         3006                                     emits-change writable

Signed-off-by: Howard Chiu <howard.chiu@quantatw.com>
Change-Id: Ifda89310590c9d914fa0a302df412fead807daa8
Signed-off-by: Potin Lai <potin.lai@quantatw.com>