From: "Andreas Färber" <afaerber@suse.de>
To: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
ulf.hansson@linaro.org, robh+dt@kernel.org
Cc: sboyd@kernel.org, linux-arm-kernel@lists.infradead.org,
linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
devicetree@vger.kernel.org, thomas.liau@actions-semi.com,
linux-actions@lists.infradead.org, linus.walleij@linaro.org,
linux-clk@vger.kernel.org
Subject: Re: [PATCH 2/7] dt-bindings: mmc: Add Actions Semi SD/MMC/SDIO controller binding
Date: Mon, 10 Jun 2019 15:45:37 +0200 [thread overview]
Message-ID: <5d164528-c797-5f94-f905-719d4f69542c@suse.de> (raw)
In-Reply-To: <20190608195317.6336-3-manivannan.sadhasivam@linaro.org>
Am 08.06.19 um 21:53 schrieb Manivannan Sadhasivam:
> Add devicetree binding for Actions Semi Owl SoC's SD/MMC/SDIO controller.
>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---
> .../devicetree/bindings/mmc/owl-mmc.txt | 37 +++++++++++++++++++
> 1 file changed, 37 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mmc/owl-mmc.txt
Rob, should this be YAML now?
>
> diff --git a/Documentation/devicetree/bindings/mmc/owl-mmc.txt b/Documentation/devicetree/bindings/mmc/owl-mmc.txt
> new file mode 100644
> index 000000000000..a702f8d66cec
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mmc/owl-mmc.txt
> @@ -0,0 +1,37 @@
> +Actions Semi Owl SoCs SD/MMC/SDIO controller
> +
> +Required properties:
> +- compatible: should be "actions,owl-mmc"
> +- reg: offset and length of the register set for the device.
> +- interrupts: single interrupt specifier.
> +- clocks: single clock specifier of the controller clock.
> +- resets: phandle to the reset line.
> +- dma-names: should be "mmc".
> +- dmas: single DMA channel specifier
I recall the main blocker for MMC being regulators, i.e. the I²C
attached multi-function PMIC. Yet I don't see any such required property
here, nor any patch series implementing it. Seems like this relies on
U-Boot having initialized SD/eMMC? Do you intend to make them optional
or did you want to hold off merging this one until the rest is done?
> +
> +Optional properties:
> +- pinctrl-names: pinctrl state names "default" must be defined.
> +- pinctrl-0: phandle referencing pin configuration of the controller.
> +- bus-width: see mmc.txt
> +- cap-sd-highspeed: see mmc.txt
> +- cap-mmc-highspeed: see mmc.txt
> +- sd-uhs-sdr12: see mmc.txt
> +- sd-uhs-sdr25: see mmc.txt
> +- sd-uhs-sdr50: see mmc.txt
> +- non-removable: see mmc.txt
I'm not convinced duplicating common properties is a good idea here, in
particular pinctrl.
Regards,
Andreas
> +
> +Example:
> +
> + mmc0: mmc@e0330000 {
> + compatible = "actions,owl-mmc";
> + reg = <0x0 0xe0330000 0x0 0x4000>;
> + interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&cmu CLK_SD0>;
> + resets = <&cmu RESET_SD0>;
> + dmas = <&dma 2>;
> + dma-names = "mmc";
> + pinctrl-names = "default";
> + pinctrl-0 = <&mmc0_default>;
> + bus-width = <4>;
> + cap-sd-highspeed;
> + };
>
--
SUSE Linux GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany
GF: Felix Imendörffer, Mary Higgins, Sri Rasiah
HRB 21284 (AG Nürnberg)
next prev parent reply other threads:[~2019-06-10 13:46 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-08 19:53 [PATCH 0/7] Add SD/MMC driver for Actions Semi S900 SoC Manivannan Sadhasivam
2019-06-08 19:53 ` [PATCH 1/7] clk: actions: Fix factor clk struct member access Manivannan Sadhasivam
2019-06-10 13:36 ` Andreas Färber
2019-06-10 16:05 ` Manivannan Sadhasivam
2019-06-10 15:01 ` Stephen Boyd
2019-06-08 19:53 ` [PATCH 2/7] dt-bindings: mmc: Add Actions Semi SD/MMC/SDIO controller binding Manivannan Sadhasivam
2019-06-10 13:45 ` Andreas Färber [this message]
2019-06-10 16:04 ` Manivannan Sadhasivam
2019-07-09 2:16 ` Rob Herring
2019-06-08 19:53 ` [PATCH 3/7] arm64: dts: actions: Add MMC controller support for S900 Manivannan Sadhasivam
2019-06-08 19:53 ` [PATCH 4/7] arm64: dts: actions: Add uSD and eMMC support for Bubblegum96 Manivannan Sadhasivam
2019-06-10 14:08 ` Andreas Färber
2019-06-10 16:11 ` Manivannan Sadhasivam
2019-06-08 19:53 ` [PATCH 5/7] mmc: Add Actions Semi Owl SoCs SD/MMC driver Manivannan Sadhasivam
2019-07-22 13:41 ` Ulf Hansson
2019-08-21 2:26 ` Manivannan Sadhasivam
2019-06-08 19:53 ` [PATCH 6/7] MAINTAINERS: Add entry for Actions Semi SD/MMC driver and binding Manivannan Sadhasivam
2019-06-08 19:53 ` [PATCH 7/7] arm64: configs: Enable Actions Semi platform in defconfig Manivannan Sadhasivam
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