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Message-ID: <530377EE.8010909@redhat.com>
Date: Tue, 18 Feb 2014 16:10:38 +0100
From: Hans de Goede <hdegoede@...hat.com>
To: Maxime Ripard <maxime.ripard@...e-electrons.com>,
David Lanzendörfer
<david.lanzendoerfer@....ch>
CC: devicetree@...r.kernel.org, Ulf Hansson <ulf.hansson@...aro.org>,
Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
Mike Turquette <mturquette@...aro.org>,
Simon Baatz <gmbnomis@...il.com>,
Emilio López <emilio@...pez.com.ar>,
linux-mmc@...r.kernel.org, Chris Ball <chris@...ntf.net>,
linux-kernel@...r.kernel.org,
H Hartley Sweeten <hsweeten@...ionengravers.com>,
linux-sunxi@...glegroups.com, Tejun Heo <tj@...nel.org>,
Guennadi Liakhovetski <g.liakhovetski@....de>,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v7 5/8] ARM: dts: sun7i: Add support for mmc
Hi,
On 02/18/2014 03:22 PM, Maxime Ripard wrote:
> On Mon, Feb 17, 2014 at 11:02:41AM +0100, David Lanzendörfer wrote:
>> Signed-off-by: David Lanzendörfer <david.lanzendoerfer@....ch>
>> Signed-off-by: Hans de Goede <hdegoede@...hat.com>
>> ---
>> arch/arm/boot/dts/sun7i-a20-cubieboard2.dts | 8 +++
>> arch/arm/boot/dts/sun7i-a20-cubietruck.dts | 8 +++
>> arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts | 23 +++++++++
>> arch/arm/boot/dts/sun7i-a20.dtsi | 61 +++++++++++++++++++++++
>> 4 files changed, 100 insertions(+)
>>
>
> I'd prefer to have three patches here:
> - One that add the controllers
> - One that add the pin muxing options
> - One that enable the controllers on the various boards.
>
>> diff --git a/arch/arm/boot/dts/sun7i-a20-cubieboard2.dts b/arch/arm/boot/dts/sun7i-a20-cubieboard2.dts
>> index 5c51cb8..ae800b6 100644
>> --- a/arch/arm/boot/dts/sun7i-a20-cubieboard2.dts
>> +++ b/arch/arm/boot/dts/sun7i-a20-cubieboard2.dts
>> @@ -34,6 +34,14 @@
>> };
>> };
>>
>> + mmc0: mmc@...0f000 {
>> + pinctrl-names = "default", "default";
>> + pinctrl-0 = <&mmc0_pins_a>;
>> + pinctrl-1 = <&mmc0_cd_pin_reference_design>;
>
> This can be made a single pinctrl group, you don't need the pinctrl-1
> stuff, it only complicates the node.
Then how do we deal with boards which use a different gpio for card-detect ?
In that case we don't want to change the mux setting of the reference
design cd pin. IOW I believe that having 2 separate pinctrl settings for
this is the rigt thing todo. I would prefer using just mmc0_cd_pin_a instead
of _reference_design though.
Oh wait, you're probably talking about using:
pinctrl-0 = <&mmc0_pins_a>, <&mmc0_cd_pin_reference_design>;
Yes that would be better.
>
>> + cd-gpios = <&pio 7 1 0>; /* PH1 */
>> + status = "okay";
>> + };
>> +
>> pinctrl@...20800 {
>> led_pins_cubieboard2: led_pins@0 {
>> allwinner,pins = "PH20", "PH21";
>> diff --git a/arch/arm/boot/dts/sun7i-a20-cubietruck.dts b/arch/arm/boot/dts/sun7i-a20-cubietruck.dts
>> index f9dcb61..370cef84 100644
>> --- a/arch/arm/boot/dts/sun7i-a20-cubietruck.dts
>> +++ b/arch/arm/boot/dts/sun7i-a20-cubietruck.dts
>> @@ -19,6 +19,14 @@
>> compatible = "cubietech,cubietruck", "allwinner,sun7i-a20";
>>
>> soc@...00000 {
>> + mmc0: mmc@...0f000 {
>> + pinctrl-names = "default", "default";
>> + pinctrl-0 = <&mmc0_pins_a>;
>> + pinctrl-1 = <&mmc0_cd_pin_reference_design>;
>> + cd-gpios = <&pio 7 1 0>; /* PH1 */
>> + status = "okay";
>> + };
>> +
>> pinctrl@...20800 {
>> led_pins_cubietruck: led_pins@0 {
>> allwinner,pins = "PH7", "PH11", "PH20", "PH21";
>> diff --git a/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts b/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts
>> index ead3013..685ec06 100644
>> --- a/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts
>> +++ b/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts
>> @@ -34,7 +34,30 @@
>> };
>> };
>>
>> + mmc0: mmc@...0f000 {
>> + pinctrl-names = "default", "default";
>> + pinctrl-0 = <&mmc0_pins_a>;
>> + pinctrl-1 = <&mmc0_cd_pin_reference_design>;
>> + cd-gpios = <&pio 7 1 0>; /* PH1 */
>> + status = "okay";
>> + };
>> +
>> + mmc3: mmc@...12000 {
>> + pinctrl-names = "default", "default";
>> + pinctrl-0 = <&mmc3_pins_a>;
>> + pinctrl-1 = <&mmc3_cd_pin_olinuxinom>;
>> + cd-gpios = <&pio 7 11 0>; /* PH11 */
>> + status = "okay";
>> + };
>> +
>> pinctrl@...20800 {
>> + mmc3_cd_pin_olinuxinom: mmc3_cd_pin@0 {
>> + allwinner,pins = "PH11";
>> + allwinner,function = "gpio_in";
>> + allwinner,drive = <0>;
>> + allwinner,pull = <1>;
>> + };
>> +
>> led_pins_olinuxino: led_pins@0 {
>> allwinner,pins = "PH2";
>> allwinner,function = "gpio_out";
>> diff --git a/arch/arm/boot/dts/sun7i-a20.dtsi b/arch/arm/boot/dts/sun7i-a20.dtsi
>> index 9ff0948..5b55414 100644
>> --- a/arch/arm/boot/dts/sun7i-a20.dtsi
>> +++ b/arch/arm/boot/dts/sun7i-a20.dtsi
>> @@ -355,6 +355,46 @@
>> #size-cells = <0>;
>> };
>>
>> + mmc0: mmc@...0f000 {
>> + compatible = "allwinner,sun5i-a13-mmc";
>> + reg = <0x01c0f000 0x1000>;
>> + clocks = <&ahb_gates 8>, <&mmc0_clk>;
>> + clock-names = "ahb", "mod";
>> + interrupts = <0 32 4>;
>> + bus-width = <4>;
>
> This belongs to the board, the controller itself is able to handle
> several bus width.
I believe that providing some form of default in the dtsi makes sense
here and all boards we've seen sofar always use 4 bits, we can always
override this from the dts file itself.
>
>> + status = "disabled";
>> + };
>> +
>> + mmc1: mmc@...10000 {
>> + compatible = "allwinner,sun5i-a13-mmc";
>> + reg = <0x01c10000 0x1000>;
>> + clocks = <&ahb_gates 9>, <&mmc1_clk>;
>> + clock-names = "ahb", "mod";
>> + interrupts = <0 33 4>;
>> + bus-width = <4>;
>> + status = "disabled";
>> + };
>> +
>> + mmc2: mmc@...11000 {
>> + compatible = "allwinner,sun5i-a13-mmc";
>> + reg = <0x01c11000 0x1000>;
>> + clocks = <&ahb_gates 10>, <&mmc2_clk>;
>> + clock-names = "ahb", "mod";
>> + interrupts = <0 34 4>;
>> + bus-width = <4>;
>> + status = "disabled";
>> + };
>> +
>> + mmc3: mmc@...12000 {
>> + compatible = "allwinner,sun5i-a13-mmc";
>> + reg = <0x01c12000 0x1000>;
>> + clocks = <&ahb_gates 11>, <&mmc3_clk>;
>> + clock-names = "ahb", "mod";
>> + interrupts = <0 35 4>;
>> + bus-width = <4>;
>> + status = "disabled";
>> + };
>> +
>> pio: pinctrl@...20800 {
>> compatible = "allwinner,sun7i-a20-pinctrl";
>> reg = <0x01c20800 0x400>;
>> @@ -432,6 +472,27 @@
>> allwinner,drive = <0>;
>> allwinner,pull = <0>;
>> };
>> +
>> + mmc0_pins_a: mmc0@0 {
>> + allwinner,pins = "PF0","PF1","PF2","PF3","PF4","PF5";
>> + allwinner,function = "mmc0";
>> + allwinner,drive = <3>;
>> + allwinner,pull = <0>;
>> + };
>> +
>> + mmc0_cd_pin_reference_design: mmc0_cd_pin@0 {
>> + allwinner,pins = "PH1";
>> + allwinner,function = "gpio_in";
>> + allwinner,drive = <0>;
>> + allwinner,pull = <1>;
>> + };
>> +
>> + mmc3_pins_a: mmc3@0 {
>> + allwinner,pins = "PI4","PI5","PI6","PI7","PI8","PI9";
>> + allwinner,function = "mmc3";
>> + allwinner,drive = <3>;
>> + allwinner,pull = <0>;
>> + };
>> };
>>
>> timer@...20c00 {
>>
>
> Looks good otherwise.
>
> Thanks!
> Maxime
>
Regards,
Hans
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