linux-kernel - Re: [PATCH v6 07/14] dt: bindings: Add bindings for Marvell Xenon SD Host Controller

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Date:   Wed, 15 Mar 2017 13:48:29 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Gregory CLEMENT <gregory.clement@...e-electrons.com>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Jason Cooper <jason@...edaemon.net>,
        Andrew Lunn <andrew@...n.ch>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Mike Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Ziji Hu <huziji@...vell.com>, Jimmy Xu <zmxu@...vell.com>,
        Jisheng Zhang <jszhang@...vell.com>,
        Nadav Haklai <nadavh@...vell.com>, Ryan Gao <ygao@...vell.com>,
        Doug Jones <dougj@...vell.com>, Victor Gu <xigu@...vell.com>,
        "Wei(SOCP) Liu" <liuw@...vell.com>,
        Wilson Ding <dingwei@...vell.com>,
        Yehuda Yitschak <yehuday@...vell.com>,
        Marcin Wojtas <mw@...ihalf.com>,
        Hanna Hawa <hannah@...vell.com>,
        Kostya Porotchkin <kostap@...vell.com>
Subject: Re: [PATCH v6 07/14] dt: bindings: Add bindings for Marvell Xenon SD
 Host Controller

[...]

> +
> +Example:
> +- For eMMC:
> +
> +       sdhci@...000 {
> +               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?

> +
> +               #address-cells = <1>;
> +               #size-cells = <0>;
> +               apm_mmccard: mmccard@0 {
> +                       compatible = "mmc-card";
> +                       reg = <0>;
> +               };
> +       };
> +
> +- For SD/SDIO:
> +
> +       sdhci@...000 {
> +               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?

> +               clocks = <&sdclk>;
> +               clock-names = "core";
> +               bus-width = <4>;
> +               marvell,xenon-tun-count = <9>;
> +       };
> +
> +- For eMMC with compatible "marvell,armada-3700-sdhci":
> +
> +       sdhci@...000 {
> +               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?

> +
> +               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@...000 {
> +               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?

> +               clocks = <&sdclk>;
> +               clock-names = "core";
> +               bus-width = <4>;
> +
> +               marvell,pad-type = "sd";
> +       };
> --
> git-series 0.9.1


Kind regards
Uffe