From mboxrd@z Thu Jan 1 00:00:00 1970 From: jae.hyun.yoo@linux.intel.com (Jae Hyun Yoo) Date: Tue, 3 Jul 2018 10:01:50 -0700 Subject: [PATCH linux-next v6 04/13] dt-bindings: Add a document of PECI adapter driver for ASPEED AST24xx/25xx SoCs In-Reply-To: <20180703165148.GA11628@rob-hp-laptop> References: <20180621193721.20588-1-jae.hyun.yoo@linux.intel.com> <20180621194024.20771-1-jae.hyun.yoo@linux.intel.com> <20180703165148.GA11628@rob-hp-laptop> Message-ID: <7f7d1045-ca1f-6086-8fce-ceab53568bcd@linux.intel.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 >> Reviewed-by: Haiyue Wang >> Reviewed-by: James Feist >> Reviewed-by: Vernon Mauery >> Cc: Benjamin Herrenschmidt >> Cc: Greg KH >> Cc: Jason M Biils >> Cc: Milton Miller II >> Cc: Pavel Machek >> Cc: Robin Murphy >> Cc: Ryan Chen >> --- >> .../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 > 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 at 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 >>