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Date: Mon, 11 Nov 2019 10:07:37 +0000
From: Manish Narani <MNARANI@...inx.com>
To: Rob Herring <robh@...nel.org>
CC: "ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
"mark.rutland@....com" <mark.rutland@....com>,
"adrian.hunter@...el.com" <adrian.hunter@...el.com>,
Michal Simek <michals@...inx.com>,
Jolly Shah <JOLLYS@...inx.com>,
Nava kishore Manne <navam@...inx.com>,
Rajan Vaja <RAJANV@...inx.com>,
"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>, git <git@...inx.com>
Subject: RE: [PATCH v5 4/8] dt-bindings: mmc: Add optional generic properties
for mmc
Hi Rob,
> -----Original Message-----
> From: Rob Herring <robh@...nel.org>
> Sent: Tuesday, November 5, 2019 4:44 AM
> To: Manish Narani <MNARANI@...inx.com>
> Cc: ulf.hansson@...aro.org; mark.rutland@....com;
> adrian.hunter@...el.com; Michal Simek <michals@...inx.com>; Jolly Shah
> <JOLLYS@...inx.com>; Nava kishore Manne <navam@...inx.com>; Rajan Vaja
> <RAJANV@...inx.com>; linux-mmc@...r.kernel.org;
> devicetree@...r.kernel.org; linux-kernel@...r.kernel.org; linux-arm-
> kernel@...ts.infradead.org; git <git@...inx.com>
> Subject: Re: [PATCH v5 4/8] dt-bindings: mmc: Add optional generic
> properties for mmc
>
> On Fri, Nov 01, 2019 at 11:35:49AM +0530, Manish Narani wrote:
> > Add optional properties for mmc hosts which are used to set clk delays
> > for different speed modes in the controller.
> >
> > Signed-off-by: Manish Narani <manish.narani@...inx.com>
> > ---
> > .../bindings/mmc/mmc-controller.yaml | 92 +++++++++++++++++++
> > 1 file changed, 92 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml
> b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml
> > index 080754e0ef35..87a83d966851 100644
> > --- a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml
> > +++ b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml
> > @@ -212,6 +212,98 @@ properties:
> > description:
> > eMMC HS400 enhanced strobe mode is supported
> >
> > + # Below mentioned are the clock (phase) delays which are to be
> configured
> > + # in the controller while switching to particular speed mode. The range
> > + # of values are 0 to 359 degrees.
> > +
> > + clk-phase-legacy:
> > + allOf:
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > + - minimum: 0
> > + - maximum: 359
> > + description:
> > + Input/Output Clock Delay pair in degrees for Legacy Mode.
> > +
> > + clk-phase-mmc-hs:
> > + allOf:
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > + - minimum: 0
> > + - maximum: 359
> > + description:
> > + Input/Output Clock Delay pair degrees for MMC HS.
> > +
> > + clk-phase-sd-hs:
> > + allOf:
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > + - minimum: 0
> > + - maximum: 359
> > + description:
> > + Input/Output Clock Delay pair in degrees for SD HS.
> > +
> > + clk-phase-uhs-sdr12:
> > + allOf:
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > + - minimum: 0
> > + - maximum: 359
> > + description:
> > + Input/Output Clock Delay pair in degrees for SDR12.
> > +
> > + clk-phase-uhs-sdr25:
> > + allOf:
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > + - minimum: 0
> > + - maximum: 359
> > + description:
> > + Input/Output Clock Delay pair in degrees for SDR25.
> > +
> > + clk-phase-uhs-sdr50:
> > + allOf:
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > + - minimum: 0
> > + - maximum: 359
> > + description:
> > + Input/Output Clock Delay pair in degrees for SDR50.
> > +
> > + clk-phase-uhs-sdr104:
> > + allOf:
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > + - minimum: 0
> > + - maximum: 359
> > + description:
> > + Input/Output Clock Delay pair in degrees for SDR104.
> > +
> > + clk-phase-uhs-ddr50:
> > + allOf:
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > + - minimum: 0
> > + - maximum: 359
> > + description:
> > + Input/Output Clock Delay pair in degrees for SD DDR50.
> > +
> > + clk-phase-mmc-ddr52:
> > + allOf:
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > + - minimum: 0
> > + - maximum: 359
> > + description:
> > + Input/Output Clock Delay pair in degrees for MMC DDR52.
> > +
> > + clk-phase-mmc-hs200:
> > + allOf:
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > + - minimum: 0
> > + - maximum: 359
> > + description:
> > + Input/Output Clock Delay pair in degrees for MMC HS200.
> > +
> > + clk-phase-mmc-hs400:
> > + allOf:
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > + - minimum: 0
> > + - maximum: 359
> > + description:
> > + Input/Output Clock Delay pair in degrees for MMC HS400.
>
> This can be condensed into:
>
> patternProperties:
>
> "^clk-phase-(legacy|sd-hs|mmc-(hs|hs[24]00|ddr52)|uhs-
> (sdr(12|25|50|104)|ddr50))$":
>
> Or if you want to divide them between SD and MMC ones, that would be
> fine for me.
Below change should work? Please review.
--- a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml
+++ b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml
@@ -333,6 +333,16 @@ patternProperties:
required:
- reg
+ "^clk-phase-(legacy|sd-hs|mmc-(hs|hs[24]00|ddr52)|uhs-(sdr(12|25|50|104)|ddr50))$":
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/uint32
+ - minimum: 0
+ - maximum: 359
+ description:
+ Set the clock (phase) delays which are to be configured in the
+ controller while switching to particular speed mode. These values
+ are in pair of degrees.
+
dependencies:
cd-debounce-delay-ms: [ cd-gpios ]
fixed-emmc-driver-type: [ non-removable ]
@@ -351,6 +361,7 @@ examples:
keep-power-in-suspend;
wakeup-source;
mmc-pwrseq = <&sdhci0_pwrseq>;
+ clk-phase-sd-hs = <63>, <72>;
};
- |
Thanks,
Manish
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