Re: [PATCH 06/10] ARM: dts: Add MSHC0 dt node for eMMC device for exynos3250-artik5 module

Chanwoo Choi
2016-03-14T08:15:46Z

On 2016년 03월 14일 15:57, Krzysztof Kozlowski wrote:
> On 14.03.2016 11:04, Chanwoo Choi wrote:
>> From: Jaehoon Chung <jh80.chung@samsung.com>
>>
>> This patch adds MSHC (Mobile Storage Host Controller) dt node for Exynos3250
>> SoC. MSHC is an interface between the system and the eMMC device.
>>
>> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
>> Signed-off-by: Andi Shyti <andi.shyti@samsung.com>
>> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
>> ---
>> arch/arm/boot/dts/exynos3250-artik5.dtsi | 19 +++++++++++++++++++
>> 1 file changed, 19 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/exynos3250-artik5.dtsi b/arch/arm/boot/dts/exynos3250-artik5.dtsi
>> index 97d0087efb9f..75b291c10cdc 100644
>> --- a/arch/arm/boot/dts/exynos3250-artik5.dtsi
>> +++ b/arch/arm/boot/dts/exynos3250-artik5.dtsi
>> @@ -277,6 +277,25 @@
>> };
>> };
>>
>> +&mshc_0 {
>> + num-slots = <1>;
>> + broken-cd;
>> + non-removable;
>
> Broken or non-removable, not both.

I'll remove the 'broken-cd' property.

>
>> + cap-mmc-highspeed;
>> + desc-num = <4>;
>> + card-detect-delay = <200>;
>> + vmmc-supply = <&ldo11_reg>;
>
> Isn't this vqmmc-supply?

I'll fix it as following by using ldo12_reg:
vmmc-supply = <&ldo12_reg>;

>
> BTW, both MMC0 regulators (ldo11, ldo12) are marked as always-on. Why
> they cannot be controlled by XMMC0CDN (just like on Rinato)?

I'll fix it like rinato board to handle the ldo11/ldo12 as following:
gpk0-2 is XMMC0CDN pin.

ldo11_reg: LDO11 {
- /* VDD_MMC */
+ /* VDD74 ~ VDD75 */
regulator-name = "VLDO11_1.8V";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
- regulator-always-on;
+ samsung,ext-control-gpios = <&gpk0 2 GPIO_ACTIVE_HIGH>;
};

ldo12_reg: LDO12 {
@@ -177,7 +178,7 @@
regulator-name = "VLDO12_2.8V";
regulator-min-microvolt = <2800000>;
regulator-max-microvolt = <2800000>;
- regulator-always-on;
+ samsung,ext-control-gpios = <&gpk0 2 GPIO_ACTIVE_HIGH>;
};

>
> What is the benefit of making this patch separate from "Add
> exynos3250-artik5 dtsi file for ARTIK5 module"? Does the board boot
> properly without this patch?

OK. I'll merge it with 5/10 patch.

Best Regards,
Chanwoo Choi

[snip]