From mboxrd@z Thu Jan 1 00:00:00 1970 From: pavel@ucw.cz (Pavel Machek) Date: Tue, 6 Mar 2018 13:40:02 +0100 Subject: [PATCH v2 2/8] [PATCH 2/8] Documentations: dt-bindings: Add a document of PECI adapter driver for Aspeed AST24xx/25xx SoCs In-Reply-To: <20180221161606.32247-3-jae.hyun.yoo@linux.intel.com> References: <20180221161606.32247-1-jae.hyun.yoo@linux.intel.com> <20180221161606.32247-3-jae.hyun.yoo@linux.intel.com> Message-ID: <20180306124002.GA13950@amd> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi! > Signed-off-by: Jae Hyun Yoo > --- > .../devicetree/bindings/peci/peci-aspeed.txt | 73 ++++++++++++++++++++++ > 1 file changed, 73 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..8a86f346d550 > --- /dev/null > +++ b/Documentation/devicetree/bindings/peci/peci-aspeed.txt > @@ -0,0 +1,73 @@ > +Device tree configuration for PECI buses on the AST24XX and AST25XX SoCs. Are these SoCs x86-based? > +Required properties: > +- compatible > + "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 registers location and length. Other dts documents put it on one line, reg: Should contain ... > +- clock_frequency > + Should contain the operation frequency of PECI hardware module. > + 187500 ~ 24000000 specify this is Hz? > +- 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 which time frame > + this controller will sample PECI signal for data read back. Usually in > + the middle of a bit time is the best. English? "This value will determine when this controller"? > + 0 ~ 15 (default: 8) > + > +- cmd_timeout_ms > + Command timeout in units of ms. > + 1 ~ 60000 (default: 1000) > + > +Example: > + peci: peci at 1e78b000 { > + compatible = "simple-bus"; > + #address-cells = <1>; > + #size-cells = <1>; > + ranges = <0x0 0x1e78b000 0x60>; > + > + peci0: peci-bus at 0 { > + compatible = "aspeed,ast2500-peci"; > + reg = <0x0 0x60>; > + #address-cells = <1>; > + #size-cells = <0>; > + interrupts = <15>; > + clocks = <&clk_clkin>; > + clock-frequency = <24000000>; > + msg-timing-nego = <1>; > + addr-timing-nego = <1>; > + rd-sampling-point = <8>; > + cmd-timeout-ms = <1000>; > + }; > + }; > \ No newline at end of file -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 181 bytes Desc: Digital signature URL: