Re: [PATCH 2/2] ARM: shmobile: silk: add SDHI0/1 DT support

[Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>]

Hello.

On 02/22/2015 03:45 AM, Magnus Damm wrote:

>> Define the SILK board dependent parts of the SDHI0  (connected to SDIO Wi-Fi
>> chip)  and SDHI1  (connected to micro-SD slot) device nodes along with the
>> necessary voltage regulators.

>> Based on the original patch by Vladimir Barinov
>> <vladimir.barinov@cogentembedded.com>.

>> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>

> Thanks for your patch. One question - above you write that SDHI1 is micro-SD...

    Yes, have double-checked now.

>> @@ -100,3 +159,25 @@
>>          non-removable;
>>          status = "okay";
>>   };
>> +
>> +&sdhi0 {
>> +       pinctrl-0 = <&sdhi0_pins>;
>> +       pinctrl-names = "default";
>> +
>> +       vmmc-supply = <&vcc_sdhi0>;
>> +       vqmmc-supply = <&vccq_sdhi0>;
>> +       cd-gpios = <&gpio6 6 GPIO_ACTIVE_LOW>;
>> +       wp-gpios = <&gpio6 7 GPIO_ACTIVE_LOW>;
>> +       status = "okay";
>> +};
>> +
>> +&sdhi1 {
>> +       pinctrl-0 = <&sdhi1_pins>;
>> +       pinctrl-names = "default";
>> +
>> +       vmmc-supply = <&vcc_sdhi1>;
>> +       vqmmc-supply = <&vccq_sdhi1>;
>> +       cd-gpios = <&gpio6 14 GPIO_ACTIVE_LOW>;
>> +       wp-gpios = <&gpio6 15 GPIO_ACTIVE_LOW>;
>> +       status = "okay";
>> +};

> ... however here the WP signal is assigned.

> I believe micro-SD doesn't use the WP signal, so either I'm wrong or
> the patch needs to be updated to reflect reality. =)

    Both seem correct: SD1_WP signal is just tied to VCCQ_SD1. Do you think we 
should still drop it?

> Also, I doubt that an on-board SDIO module makes use of CD and/or WP signals?

    Those two are tied to VCCQ_SD0 as well. Do you think we should drop them?

> Thanks,
> / magnus

WBR, Sergei