| Message ID | 20180621194024.20771-1-jae.hyun.yoo@linux.intel.com |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | PECI device driver introduction | expand |
On Thu, Jun 21, 2018 at 12:40:24PM -0700, Jae Hyun Yoo wrote: > This commit adds a dt-bindings document of PECI adapter driver for ASPEED > AST24xx/25xx SoCs. > > Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> > Reviewed-by: Haiyue Wang <haiyue.wang@linux.intel.com> > Reviewed-by: James Feist <james.feist@linux.intel.com> > Reviewed-by: Vernon Mauery <vernon.mauery@linux.intel.com> > Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> > Cc: Greg KH <gregkh@linuxfoundation.org> > Cc: Jason M Biils <jason.m.bills@linux.intel.com> > Cc: Milton Miller II <miltonm@us.ibm.com> > Cc: Pavel Machek <pavel@ucw.cz> > Cc: Robin Murphy <robin.murphy@arm.com> > Cc: Ryan Chen <ryan_chen@aspeedtech.com> > --- > .../devicetree/bindings/peci/peci-aspeed.txt | 57 +++++++++++++++++++ > 1 file changed, 57 insertions(+) > create mode 100644 Documentation/devicetree/bindings/peci/peci-aspeed.txt > > diff --git a/Documentation/devicetree/bindings/peci/peci-aspeed.txt b/Documentation/devicetree/bindings/peci/peci-aspeed.txt > new file mode 100644 > index 000000000000..8c35f905589d > --- /dev/null > +++ b/Documentation/devicetree/bindings/peci/peci-aspeed.txt > @@ -0,0 +1,57 @@ > +Device tree configuration for PECI buses on the AST24XX and AST25XX SoCs. > + > +Required properties: > +- compatible : Should be "aspeed,ast2400-peci" or "aspeed,ast2500-peci" > + - aspeed,ast2400-peci: ASPEED AST2400 family PECI > + controller > + - aspeed,ast2500-peci: ASPEED AST2500 family PECI > + controller Just this is sufficient: Should be one of: "aspeed,ast2400-peci" "aspeed,ast2500-peci" With that, Reviewed-by: Rob Herring <robh@kernel.org> > +- reg : Should contain PECI controller registers location and > + length. > +- #address-cells : Should be <1> required to define a client address. > +- #size-cells : Should be <0> required to define a client address. > +- interrupts : Should contain PECI controller interrupt. > +- clocks : Should contain clock source for PECI controller. Should > + reference the external oscillator clock in the second > + cell. > +- resets : Should contain phandle to reset controller with the reset > + number in the second cell. > +- clock-frequency : Should contain the operation frequency of PECI controller > + in units of Hz. > + 187500 ~ 24000000 > + > +Optional properties: > +- msg-timing : Message timing negotiation period. This value will > + determine the period of message timing negotiation to be > + issued by PECI controller. The unit of the programmed > + value is four times of PECI clock period. > + 0 ~ 255 (default: 1) > +- addr-timing : Address timing negotiation period. This value will > + determine the period of address timing negotiation to be > + issued by PECI controller. The unit of the programmed > + value is four times of PECI clock period. > + 0 ~ 255 (default: 1) > +- rd-sampling-point : Read sampling point selection. The whole period of a bit > + time will be divided into 16 time frames. This value will > + determine the time frame in which the controller will > + sample PECI signal for data read back. Usually in the > + middle of a bit time is the best. > + 0 ~ 15 (default: 8) > +- cmd-timeout-ms : Command timeout in units of ms. > + 1 ~ 60000 (default: 1000) > + > +Example: > + peci0: peci-bus@0 { > + compatible = "aspeed,ast2500-peci"; > + reg = <0x0 0x60>; > + #address-cells = <1>; > + #size-cells = <0>; > + interrupts = <15>; > + clocks = <&syscon ASPEED_CLK_GATE_REFCLK>; > + resets = <&syscon ASPEED_RESET_PECI>; > + clock-frequency = <24000000>; > + msg-timing = <1>; > + addr-timing = <1>; > + rd-sampling-point = <8>; > + cmd-timeout-ms = <1000>; > + }; > -- > 2.17.1 >
Hi Rob, Thanks a lot for the review. Please check my inline answer. On 7/3/2018 9:51 AM, Rob Herring wrote: > On Thu, Jun 21, 2018 at 12:40:24PM -0700, Jae Hyun Yoo wrote: >> This commit adds a dt-bindings document of PECI adapter driver for ASPEED >> AST24xx/25xx SoCs. >> >> Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> >> Reviewed-by: Haiyue Wang <haiyue.wang@linux.intel.com> >> Reviewed-by: James Feist <james.feist@linux.intel.com> >> Reviewed-by: Vernon Mauery <vernon.mauery@linux.intel.com> >> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> >> Cc: Greg KH <gregkh@linuxfoundation.org> >> Cc: Jason M Biils <jason.m.bills@linux.intel.com> >> Cc: Milton Miller II <miltonm@us.ibm.com> >> Cc: Pavel Machek <pavel@ucw.cz> >> Cc: Robin Murphy <robin.murphy@arm.com> >> Cc: Ryan Chen <ryan_chen@aspeedtech.com> >> --- >> .../devicetree/bindings/peci/peci-aspeed.txt | 57 +++++++++++++++++++ >> 1 file changed, 57 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/peci/peci-aspeed.txt >> >> diff --git a/Documentation/devicetree/bindings/peci/peci-aspeed.txt b/Documentation/devicetree/bindings/peci/peci-aspeed.txt >> new file mode 100644 >> index 000000000000..8c35f905589d >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/peci/peci-aspeed.txt >> @@ -0,0 +1,57 @@ >> +Device tree configuration for PECI buses on the AST24XX and AST25XX SoCs. >> + >> +Required properties: >> +- compatible : Should be "aspeed,ast2400-peci" or "aspeed,ast2500-peci" >> + - aspeed,ast2400-peci: ASPEED AST2400 family PECI >> + controller >> + - aspeed,ast2500-peci: ASPEED AST2500 family PECI >> + controller > > Just this is sufficient: > > Should be one of: > "aspeed,ast2400-peci" > "aspeed,ast2500-peci" > > With that, > > Reviewed-by: Rob Herring <robh@kernel.org> > Thanks! I'll change it as you commented out. Jae >> +- reg : Should contain PECI controller registers location and >> + length. >> +- #address-cells : Should be <1> required to define a client address. >> +- #size-cells : Should be <0> required to define a client address. >> +- interrupts : Should contain PECI controller interrupt. >> +- clocks : Should contain clock source for PECI controller. Should >> + reference the external oscillator clock in the second >> + cell. >> +- resets : Should contain phandle to reset controller with the reset >> + number in the second cell. >> +- clock-frequency : Should contain the operation frequency of PECI controller >> + in units of Hz. >> + 187500 ~ 24000000 >> + >> +Optional properties: >> +- msg-timing : Message timing negotiation period. This value will >> + determine the period of message timing negotiation to be >> + issued by PECI controller. The unit of the programmed >> + value is four times of PECI clock period. >> + 0 ~ 255 (default: 1) >> +- addr-timing : Address timing negotiation period. This value will >> + determine the period of address timing negotiation to be >> + issued by PECI controller. The unit of the programmed >> + value is four times of PECI clock period. >> + 0 ~ 255 (default: 1) >> +- rd-sampling-point : Read sampling point selection. The whole period of a bit >> + time will be divided into 16 time frames. This value will >> + determine the time frame in which the controller will >> + sample PECI signal for data read back. Usually in the >> + middle of a bit time is the best. >> + 0 ~ 15 (default: 8) >> +- cmd-timeout-ms : Command timeout in units of ms. >> + 1 ~ 60000 (default: 1000) >> + >> +Example: >> + peci0: peci-bus@0 { >> + compatible = "aspeed,ast2500-peci"; >> + reg = <0x0 0x60>; >> + #address-cells = <1>; >> + #size-cells = <0>; >> + interrupts = <15>; >> + clocks = <&syscon ASPEED_CLK_GATE_REFCLK>; >> + resets = <&syscon ASPEED_RESET_PECI>; >> + clock-frequency = <24000000>; >> + msg-timing = <1>; >> + addr-timing = <1>; >> + rd-sampling-point = <8>; >> + cmd-timeout-ms = <1000>; >> + }; >> -- >> 2.17.1 >>
diff --git a/Documentation/devicetree/bindings/peci/peci-aspeed.txt b/Documentation/devicetree/bindings/peci/peci-aspeed.txt new file mode 100644 index 000000000000..8c35f905589d --- /dev/null +++ b/Documentation/devicetree/bindings/peci/peci-aspeed.txt @@ -0,0 +1,57 @@ +Device tree configuration for PECI buses on the AST24XX and AST25XX SoCs. + +Required properties: +- compatible : Should be "aspeed,ast2400-peci" or "aspeed,ast2500-peci" + - aspeed,ast2400-peci: ASPEED AST2400 family PECI + controller + - aspeed,ast2500-peci: ASPEED AST2500 family PECI + controller +- reg : Should contain PECI controller registers location and + length. +- #address-cells : Should be <1> required to define a client address. +- #size-cells : Should be <0> required to define a client address. +- interrupts : Should contain PECI controller interrupt. +- clocks : Should contain clock source for PECI controller. Should + reference the external oscillator clock in the second + cell. +- resets : Should contain phandle to reset controller with the reset + number in the second cell. +- clock-frequency : Should contain the operation frequency of PECI controller + in units of Hz. + 187500 ~ 24000000 + +Optional properties: +- msg-timing : Message timing negotiation period. This value will + determine the period of message timing negotiation to be + issued by PECI controller. The unit of the programmed + value is four times of PECI clock period. + 0 ~ 255 (default: 1) +- addr-timing : Address timing negotiation period. This value will + determine the period of address timing negotiation to be + issued by PECI controller. The unit of the programmed + value is four times of PECI clock period. + 0 ~ 255 (default: 1) +- rd-sampling-point : Read sampling point selection. The whole period of a bit + time will be divided into 16 time frames. This value will + determine the time frame in which the controller will + sample PECI signal for data read back. Usually in the + middle of a bit time is the best. + 0 ~ 15 (default: 8) +- cmd-timeout-ms : Command timeout in units of ms. + 1 ~ 60000 (default: 1000) + +Example: + peci0: peci-bus@0 { + compatible = "aspeed,ast2500-peci"; + reg = <0x0 0x60>; + #address-cells = <1>; + #size-cells = <0>; + interrupts = <15>; + clocks = <&syscon ASPEED_CLK_GATE_REFCLK>; + resets = <&syscon ASPEED_RESET_PECI>; + clock-frequency = <24000000>; + msg-timing = <1>; + addr-timing = <1>; + rd-sampling-point = <8>; + cmd-timeout-ms = <1000>; + };