Hi Rahul, Tomasz,
On 14.05.2014 21:17, Rahul Sharma wrote:
> From: Tomasz Stanislawski <t.stanislaws@xxxxxxxxxxx>
>
> Add exynos-simple-phy driver to support a single register
> PHY interfaces present on Exynos4 SoC.
>
> Signed-off-by: Tomasz Stanislawski <t.stanislaws@xxxxxxxxxxx>
> Signed-off-by: Rahul Sharma <Rahul.Sharma@xxxxxxxxxxx>
>
> ---
> .../devicetree/bindings/phy/samsung-phy.txt | 56 ++++++
> drivers/phy/Kconfig | 5 +
> drivers/phy/Makefile | 1 +
> drivers/phy/exynos-simple-phy.c | 189 ++++++++++++++++++++
> include/dt-bindings/phy/exynos-simple-phy.h | 27 +++
> 5 files changed, 278 insertions(+)
> create mode 100644 drivers/phy/exynos-simple-phy.c
> create mode 100644 include/dt-bindings/phy/exynos-simple-phy.h
>
> diff --git a/Documentation/devicetree/bindings/phy/samsung-phy.txt b/Documentation/devicetree/bindings/phy/samsung-phy.txt
> index 2049261..12ad9cf 100644
> --- a/Documentation/devicetree/bindings/phy/samsung-phy.txt
> +++ b/Documentation/devicetree/bindings/phy/samsung-phy.txt
> @@ -161,3 +161,59 @@ Example:
> usbdrdphy0 = &usb3_phy0;
> usbdrdphy1 = &usb3_phy1;
> };
> +
> +Samsung S5P/EXYNOS SoC series SIMPLE PHY
> +-------------------------------------------------
> +
> +Required properties:
> +- compatible : should be one of the listed compatibles:
> + - "samsung,exynos4210-simple-phy"
> + - "samsung,exynos4412-simple-phy"
> + - "samsung,exynos5250-simple-phy"
> + - "samsung,exynos5420-simple-phy"
> +- samsung,pmureg-phandle - handle to syscon to control PMU registers
> +- #phy-cells : from the generic phy bindings, must be 1;
> +
> +For "samsung,exynos4210-simple-phy" compatible PHYs the second cell in
> +the PHY specifier identifies the PHY and the supported phys for exynos4210
> +are:
> + HDMI_PHY,
> + DAC_PHY,
> + ADC_PHY,
> + PCIE_PHY,
> + SATA_PHY.
> +
> +For "samsung,exynos4412-simple-phy" compatible PHYs the second cell in
> +the PHY specifier identifies the PHY and the supported phys for exynos4412
> +are:
> + HDMI_PHY,
> + ADC_PHY.
> +
> +For "samsung,exynos5250-simple-phy" compatible PHYs the second cell in
> +the PHY specifier identifies the PHY and the supported phys for exynos5250
> +are:
> + HDMI_PHY,
> + ADC_PHY,
> + SATA_PHY.
> +
> +For "samsung,exynos5420-simple-phy" compatible PHYs the second cell in
> +the PHY specifier identifies the PHY and the supported phys for exynos5420
> +are:
> + HDMI_PHY,
> + ADC_PHY.
> +
> +Example:
> +Simple PHY provider node:
> +
> + simplephys: simple-phys@10040000 {
> + compatible = "samsung,exynos5250-simple-phy";
Missing reg property or unnecessary @unit-address suffix in node name.
> + samsung,pmu-syscon = <&pmu_system_controller>;
> + #phy-cells = <1>;
> + };
In general, the idea is quite good, but I think this should rather bind
to the main PMU node, since this is just a part of the PMU, not another
device in the system. This also means that the PMU node itself should be
the PHY provider.
Otherwise looks good.
Best regards,
Tomasz
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