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Date: Sat, 7 May 2016 10:23:52 +0530
From: Alim Akhtar <alim.akhtar@...il.com>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: Kukjin Kim <kgene@...nel.org>,
Krzysztof Kozlowski <k.kozlowski@...sung.com>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-samsung-soc@...r.kernel.org"
<linux-samsung-soc@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Javier Martinez Canillas <javier@....samsung.com>,
Arnd Bergmann <arnd@...db.de>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
Kevin Hilman <khilman@...nel.org>,
Tomasz Figa <tomasz.figa@...il.com>,
Inki Dae <inki.dae@...sung.com>,
Chanwoo Choi <cw00.choi@...sung.com>,
Sylwester Nawrocki <s.nawrocki@...sung.com>,
Olof Johansson <olof@...om.net>,
Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [RFC PATCH 05/12] ARM: dts: exynos: Configure Exynos5410 pinctrl
for eMMC and SD card
Hi Krzysztof,
On Tue, May 3, 2016 at 11:22 PM, Krzysztof Kozlowski <krzk@...nel.org> wrote:
> Configure the pinctrl for MMC0 (eMMC) and MMC2 (microSD card).
>
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
>
> ---
>
> I am not sure about sd0_rclk. Also I wonder whether this should go to
> board DTS...
> ---
> arch/arm/boot/dts/exynos5410-pinctrl.dtsi | 87 +++++++++++++++++++++++++++++++
> 1 file changed, 87 insertions(+)
>
> diff --git a/arch/arm/boot/dts/exynos5410-pinctrl.dtsi b/arch/arm/boot/dts/exynos5410-pinctrl.dtsi
> index f9aa6bb55464..dc12a79b8b32 100644
> --- a/arch/arm/boot/dts/exynos5410-pinctrl.dtsi
> +++ b/arch/arm/boot/dts/exynos5410-pinctrl.dtsi
> @@ -277,6 +277,93 @@
> interrupt-controller;
> #interrupt-cells = <2>;
> };
> +
> + sd0_clk: sd0-clk {
> + samsung,pins = "gpc0-0";
> + samsung,pin-function = <2>;
> + samsung,pin-pud = <0>;
> + samsung,pin-drv = <3>;
> + };
> +
> + sd0_cmd: sd0-cmd {
> + samsung,pins = "gpc0-1";
> + samsung,pin-function = <2>;
> + samsung,pin-pud = <0>;
> + samsung,pin-drv = <3>;
> + };
> +
> + sd0_cd: sd0-cd {
> + samsung,pins = "gpc0-2";
> + samsung,pin-function = <2>;
> + samsung,pin-pud = <3>;
> + samsung,pin-drv = <3>;
> + };
> +
> + sd0_bus1: sd0-bus-width1 {
> + samsung,pins = "gpc0-3";
> + samsung,pin-function = <2>;
> + samsung,pin-pud = <3>;
> + samsung,pin-drv = <3>;
> + };
> +
> + sd0_bus4: sd0-bus-width4 {
> + samsung,pins = "gpc0-4", "gpc0-5", "gpc0-6";
> + samsung,pin-function = <2>;
> + samsung,pin-pud = <3>;
> + samsung,pin-drv = <3>;
> + };
> +
> + sd0_bus8: sd0-bus-width8 {
> + samsung,pins = "gpc3-0", "gpc3-1", "gpc3-2", "gpc3-3";
> + samsung,pin-function = <2>;
> + samsung,pin-pud = <3>;
> + samsung,pin-drv = <3>;
> + };
> +
> + /* TODO: What's up with with rclk? On Odroid XU this is missing... */
> + /*
> + sd0_rclk: sd0-rclk {
> + samsung,pins = "gpc0-7";
> + samsung,pin-function = <2>;
> + samsung,pin-pud = <1>;
> + samsung,pin-drv = <3>;
> + };
> + */
> +
IF Odroid XU is populated with an eMMC5.0+ device && RCLK (Data
Strobe) is connected from AP to emmc device, THEN you should configure
this dedicated PIN.
Otherwise you can remove this TODO and uncomment the node and put a
comment saying that this feature (emmc5.0+) is not supported on this
SoC.
> + sd2_clk: sd2-clk {
> + samsung,pins = "gpc2-0";
> + samsung,pin-function = <2>;
> + samsung,pin-pud = <0>;
> + samsung,pin-drv = <3>;
> + };
> +
> + sd2_cmd: sd2-cmd {
> + samsung,pins = "gpc2-1";
> + samsung,pin-function = <2>;
> + samsung,pin-pud = <0>;
> + samsung,pin-drv = <3>;
> + };
> +
> + sd2_cd: sd2-cd {
> + samsung,pins = "gpc2-2";
> + samsung,pin-function = <2>;
> + samsung,pin-pud = <3>;
> + samsung,pin-drv = <3>;
> + };
> +
> + sd2_bus1: sd2-bus-width1 {
> + samsung,pins = "gpc2-3";
> + samsung,pin-function = <2>;
> + samsung,pin-pud = <3>;
> + samsung,pin-drv = <3>;
> + };
> +
> + sd2_bus4: sd2-bus-width4 {
> + samsung,pins = "gpc2-4", "gpc2-5", "gpc2-6";
> + samsung,pin-function = <2>;
> + samsung,pin-pud = <3>;
> + samsung,pin-drv = <3>;
> + };
> };
>
> &pinctrl_1 {
> --
> 2.5.0
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
--
Regards,
Alim
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