Hi Ulf,
On 2017/3/15 20:48, Ulf Hansson wrote:
> [...]
>
>> +
>> +Example:
>> +- For eMMC:
>> +
>> + sdhci@aa0000 {
>> + compatible = "marvell,armada-ap806-sdhci";
>> + reg = <0xaa0000 0x1000>;
>> + interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>
>> + clocks = <&emmc_clk>;
>> + clock-names = "core";
>> + bus-width = <4>;
>> + marvell,xenon-phy-slow-mode;
>> + marvell,xenon-tun-count = <11>;
>
> There's no vmmc-supply here.
>
> How do you control power to the eMMC card?
>
Sorry for the delayed reply.
Just confirmed with the engineers.
It seems that there is a regulator.
I will ask for a complete node example.
>> +
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + apm_mmccard: mmccard@0 {
>> + compatible = "mmc-card";
>> + reg = <0>;
>> + };
>> + };
>> +
>> +- For SD/SDIO:
>> +
>> + sdhci@ab0000 {
>> + compatible = "marvell,armada-cp110-sdhci";
>> + reg = <0xab0000 0x1000>;
>> + interrupts = <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>
>> + vqmmc-supply = <&sd_regulator>;
>
> I guess you know vqmmc is for the I/O voltage.
>
> Again, how do you power the SD/SDIO card? No vmmc?
The vmmc-supply regulator does exist according to the engineer.
I will ask them to provide a complete one.
>
>> + clocks = <&sdclk>;
>> + clock-names = "core";
>> + bus-width = <4>;
>> + marvell,xenon-tun-count = <9>;
>> + };
>> +
>> +- For eMMC with compatible "marvell,armada-3700-sdhci":
>> +
>> + sdhci@aa0000 {
>> + compatible = "marvell,armada-3700-sdhci";
>> + reg = <0xaa0000 0x1000>,
>> + <phy_addr 0x4>;
>> + interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>
>> + clocks = <&emmcclk>;
>> + clock-names = "core";
>> + bus-width = <8>;
>> + mmc-ddr-1_8v;
>> + mmc-hs400-1_8v;
>
> Again, no vmmc?
>
The engineer told me the power to eMMC card is fixed on this platform.
They don't implement a specific regulator for eMMC core power.
>> +
>> + marvell,pad-type = "fixed-1-8v";
>> +
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + mmccard: mmccard@0 {
>> + compatible = "mmc-card";
>> + reg = <0>;
>> + };
>> + };
>> +
>> +- For SD/SDIO with compatible "marvell,armada-3700-sdhci":
>> +
>> + sdhci@ab0000 {
>> + compatible = "marvell,armada-3700-sdhci";
>> + reg = <0xab0000 0x1000>,
>> + <phy_addr 0x4>;
>> + interrupts = <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>
>> + vqmmc-supply = <&sd_regulator>;
>
> Again, no vmmc?
>
It seems that the core power to SD is also fixed.
>> + clocks = <&sdclk>;
>> + clock-names = "core";
>> + bus-width = <4>;
>> +
>> + marvell,pad-type = "sd";
>> + };
>> --
>> git-series 0.9.1
>
>
> Kind regards
> Uffe
>
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
