| Message ID | 20201209075921.26689-2-troy_lee@aspeedtech.com |
|---|---|
| State | New |
| Headers | show |
| Series | hwmon: aspeed2600-pwm-tacho: Add driver support | expand |
On Wed, Dec 09, 2020 at 03:59:17PM +0800, Troy Lee wrote: > For supporting a new AST2600 PWM/Fan hwmon driver, we add a new binding. > > Signed-off-by: Troy Lee <troy_lee@aspeedtech.com> > --- > .../bindings/hwmon/aspeed2600-pwm-tacho.txt | 69 +++++++++++++++++++ Bindings are in DT schema format now. > 1 file changed, 69 insertions(+) > create mode 100644 Documentation/devicetree/bindings/hwmon/aspeed2600-pwm-tacho.txt > > diff --git a/Documentation/devicetree/bindings/hwmon/aspeed2600-pwm-tacho.txt b/Documentation/devicetree/bindings/hwmon/aspeed2600-pwm-tacho.txt > new file mode 100644 > index 000000000000..61b11914352f > --- /dev/null > +++ b/Documentation/devicetree/bindings/hwmon/aspeed2600-pwm-tacho.txt > @@ -0,0 +1,69 @@ > +ASPEED AST2600 PWM and Fan Tacho controller device driver > + > +The ASPEED PWM controller can support upto 16 PWM outputs. The ASPEED Fan Tacho > +controller can support upto 16 Fan tachometer inputs. > + > +There can be upto 16 fans supported. Each fan can have one PWM output and > +one Fan tach inputs. > + > +Required properties for pwm-tacho node: > +- #address-cells : should be 1. > + > +- #size-cells : should be 0. > + > +- #cooling-cells: should be 2. > + > +- reg : address and length of the register set for the device. > + > +- pinctrl-names : a pinctrl state named "default" must be defined. > + > +- pinctrl-0 : phandle referencing pin configuration of the PWM ports. > + > +- compatible : should be "aspeed,ast2600-pwm-tachometer". > + > +- clocks : phandle to clock provider with the clock number in the second cell > + > +- resets : phandle to reset controller with the reset number in the second cell > + > +fan subnode format: > +=================== > +Under fan subnode there can upto 16 child nodes, with each child node > +representing a fan. There are 16 fans each fan can have one PWM port and one > +Fan tach inputs. > +For PWM port can be configured cooling-levels to create cooling device. > +Cooling device could be bound to a thermal zone for the thermal control. > + > +Required properties for each child node: > +- reg : should specify PWM source port. > + integer value in the range 0x00 to 0x0f with 0x00 indicating PWM port 0 > + and 0x0f indicating PWM port F. > + > +- cooling-levels: PWM duty cycle values in a range from 0 to 255 > + which correspond to thermal cooling states. > + > +- aspeed,fan-tach-ch : should specify the Fan tach input channel. > + integer value in the range 0 through 15, with 0 indicating > + Fan tach channel 0 and 15 indicating Fan tach channel 15. > + Atleast one Fan tach input channel is required. Already has 'fan-tach-ch' in npcm750-pwm-fan.txt. > + > +- aspeed,target-pwm : Specify the frequency of PWM. The value range from 24 to > + 780000. Default value will be set to 25000. > + > +- aspeed,pulse-pr : Specify tacho pulse per revolution of the fan. A general > + parameter of pulse-pr is 2. Already have 'pulses-per-revolution' property in pwm-fan.txt. Use that. Really, all these should be in a common fan schema that you reference. > + > +Examples: > + > +&pwm_tacho { > + status = "okay"; Don't show status in examples. > + pinctrl-names = "default"; > + pinctrl-0 = <&pinctrl_pwm0_default &pinctrl_tach0_default>; > + > + fan@0 { > + reg = <0x00>; > + aspeed,target-pwm = <25000>; > + cooling-levels = /bits/ 8 <125 151 177 203 229 255>; > + aspeed,fan-tach-ch = /bits/ 8 <0x00>; > + aspeed,pulse-pr = <2>; > + }; > +}; > -- > 2.17.1 >
The 12/11/2020 11:26, Rob Herring wrote: > On Wed, Dec 09, 2020 at 03:59:17PM +0800, Troy Lee wrote: > > For supporting a new AST2600 PWM/Fan hwmon driver, we add a new binding. > > > > Signed-off-by: Troy Lee <troy_lee@aspeedtech.com> > > --- > > .../bindings/hwmon/aspeed2600-pwm-tacho.txt | 69 +++++++++++++++++++ > > Bindings are in DT schema format now. > I'll submit a new binding with DT schema. > > 1 file changed, 69 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/hwmon/aspeed2600-pwm-tacho.txt > > > > diff --git a/Documentation/devicetree/bindings/hwmon/aspeed2600-pwm-tacho.txt b/Documentation/devicetree/bindings/hwmon/aspeed2600-pwm-tacho.txt > > new file mode 100644 > > index 000000000000..61b11914352f > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/hwmon/aspeed2600-pwm-tacho.txt > > @@ -0,0 +1,69 @@ > > +ASPEED AST2600 PWM and Fan Tacho controller device driver > > + > > +The ASPEED PWM controller can support upto 16 PWM outputs. The ASPEED Fan Tacho > > +controller can support upto 16 Fan tachometer inputs. > > + > > +There can be upto 16 fans supported. Each fan can have one PWM output and > > +one Fan tach inputs. > > + > > +Required properties for pwm-tacho node: > > +- #address-cells : should be 1. > > + > > +- #size-cells : should be 0. > > + > > +- #cooling-cells: should be 2. > > + > > +- reg : address and length of the register set for the device. > > + > > +- pinctrl-names : a pinctrl state named "default" must be defined. > > + > > +- pinctrl-0 : phandle referencing pin configuration of the PWM ports. > > + > > +- compatible : should be "aspeed,ast2600-pwm-tachometer". > > + > > +- clocks : phandle to clock provider with the clock number in the second cell > > + > > +- resets : phandle to reset controller with the reset number in the second cell > > + > > +fan subnode format: > > +=================== > > +Under fan subnode there can upto 16 child nodes, with each child node > > +representing a fan. There are 16 fans each fan can have one PWM port and one > > +Fan tach inputs. > > +For PWM port can be configured cooling-levels to create cooling device. > > +Cooling device could be bound to a thermal zone for the thermal control. > > + > > +Required properties for each child node: > > +- reg : should specify PWM source port. > > + integer value in the range 0x00 to 0x0f with 0x00 indicating PWM port 0 > > + and 0x0f indicating PWM port F. > > + > > +- cooling-levels: PWM duty cycle values in a range from 0 to 255 > > + which correspond to thermal cooling states. > > + > > +- aspeed,fan-tach-ch : should specify the Fan tach input channel. > > + integer value in the range 0 through 15, with 0 indicating > > + Fan tach channel 0 and 15 indicating Fan tach channel 15. > > + Atleast one Fan tach input channel is required. > > Already has 'fan-tach-ch' in npcm750-pwm-fan.txt. > OK. > > + > > +- aspeed,target-pwm : Specify the frequency of PWM. The value range from 24 to > > + 780000. Default value will be set to 25000. > > + > > +- aspeed,pulse-pr : Specify tacho pulse per revolution of the fan. A general > > + parameter of pulse-pr is 2. > > Already have 'pulses-per-revolution' property in pwm-fan.txt. Use that. > OK. > Really, all these should be in a common fan schema that you reference. > Are you suggesting that I should also update these properties into pwm-fan.txt with a separeated patch, perhaps? > > + > > +Examples: > > + > > +&pwm_tacho { > > + status = "okay"; > > Don't show status in examples. > Understood, it will be removed in v2. > > + pinctrl-names = "default"; > > + pinctrl-0 = <&pinctrl_pwm0_default &pinctrl_tach0_default>; > > + > > + fan@0 { > > + reg = <0x00>; > > + aspeed,target-pwm = <25000>; > > + cooling-levels = /bits/ 8 <125 151 177 203 229 255>; > > + aspeed,fan-tach-ch = /bits/ 8 <0x00>; > > + aspeed,pulse-pr = <2>; > > + }; > > +}; > > -- > > 2.17.1 > >
diff --git a/Documentation/devicetree/bindings/hwmon/aspeed2600-pwm-tacho.txt b/Documentation/devicetree/bindings/hwmon/aspeed2600-pwm-tacho.txt new file mode 100644 index 000000000000..61b11914352f --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/aspeed2600-pwm-tacho.txt @@ -0,0 +1,69 @@ +ASPEED AST2600 PWM and Fan Tacho controller device driver + +The ASPEED PWM controller can support upto 16 PWM outputs. The ASPEED Fan Tacho +controller can support upto 16 Fan tachometer inputs. + +There can be upto 16 fans supported. Each fan can have one PWM output and +one Fan tach inputs. + +Required properties for pwm-tacho node: +- #address-cells : should be 1. + +- #size-cells : should be 0. + +- #cooling-cells: should be 2. + +- reg : address and length of the register set for the device. + +- pinctrl-names : a pinctrl state named "default" must be defined. + +- pinctrl-0 : phandle referencing pin configuration of the PWM ports. + +- compatible : should be "aspeed,ast2600-pwm-tachometer". + +- clocks : phandle to clock provider with the clock number in the second cell + +- resets : phandle to reset controller with the reset number in the second cell + +fan subnode format: +=================== +Under fan subnode there can upto 16 child nodes, with each child node +representing a fan. There are 16 fans each fan can have one PWM port and one +Fan tach inputs. +For PWM port can be configured cooling-levels to create cooling device. +Cooling device could be bound to a thermal zone for the thermal control. + +Required properties for each child node: +- reg : should specify PWM source port. + integer value in the range 0x00 to 0x0f with 0x00 indicating PWM port 0 + and 0x0f indicating PWM port F. + +- cooling-levels: PWM duty cycle values in a range from 0 to 255 + which correspond to thermal cooling states. + +- aspeed,fan-tach-ch : should specify the Fan tach input channel. + integer value in the range 0 through 15, with 0 indicating + Fan tach channel 0 and 15 indicating Fan tach channel 15. + Atleast one Fan tach input channel is required. + +- aspeed,target-pwm : Specify the frequency of PWM. The value range from 24 to + 780000. Default value will be set to 25000. + +- aspeed,pulse-pr : Specify tacho pulse per revolution of the fan. A general + parameter of pulse-pr is 2. + +Examples: + +&pwm_tacho { + status = "okay"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_pwm0_default &pinctrl_tach0_default>; + + fan@0 { + reg = <0x00>; + aspeed,target-pwm = <25000>; + cooling-levels = /bits/ 8 <125 151 177 203 229 255>; + aspeed,fan-tach-ch = /bits/ 8 <0x00>; + aspeed,pulse-pr = <2>; + }; +};
For supporting a new AST2600 PWM/Fan hwmon driver, we add a new binding. Signed-off-by: Troy Lee <troy_lee@aspeedtech.com> --- .../bindings/hwmon/aspeed2600-pwm-tacho.txt | 69 +++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/aspeed2600-pwm-tacho.txt