linux-kernel - Re: [PATCH v2 2/8] dt-bindings: phy: Add Amlogic G12A USB3+PCIE Combo PHY Bindings

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Message-ID: <CAFBinCCp+bME0fnWRJx0L1E5aazUh1Hw-svsP7+D_QU4dP08nw@mail.gmail.com>
Date:   Tue, 5 Mar 2019 22:42:39 +0100
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     gregkh@...uxfoundation.org, hminas@...opsys.com, balbi@...nel.org,
        kishon@...com, devicetree@...r.kernel.org,
        linux-amlogic@...ts.infradead.org, linux-usb@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/8] dt-bindings: phy: Add Amlogic G12A USB3+PCIE Combo
 PHY Bindings

Hi Neil,

On Mon, Mar 4, 2019 at 11:38 AM Neil Armstrong <narmstrong@...libre.com> wrote:
>
> Add the Amlogic G12A Family USB3 + PCIE Combo PHY Bindings.
>
> This PHY can provide exclusively USB3 or PCIE support on shared I/Os.
>
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> Reviewed-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
> ---
>  .../bindings/phy/meson-g12a-usb3-pcie-phy.txt | 22 +++++++++++++++++++
>  1 file changed, 22 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/meson-g12a-usb3-pcie-phy.txt
>
> diff --git a/Documentation/devicetree/bindings/phy/meson-g12a-usb3-pcie-phy.txt b/Documentation/devicetree/bindings/phy/meson-g12a-usb3-pcie-phy.txt
> new file mode 100644
> index 000000000000..7cfc17e2df31
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/meson-g12a-usb3-pcie-phy.txt
> @@ -0,0 +1,22 @@
> +* Amlogic G12A USB3 + PCIE Combo PHY binding
> +
> +Required properties:
> +- compatible:  Should be "amlogic,meson-g12a-usb3-pcie-phy"
> +- #phys-cells: must be 1. The cell number is used to select the phy mode
> +  as defined in <dt-bindings/phy/phy.h> between PHY_TYPE_USB3 and PHY_TYPE_PCIE
> +- reg:         The base address and length of the registers
> +- clocks:      a phandle to the 100MHz reference clock of this PHY
> +- clock-names: must be "ref_clk"
> +- resets:      phandle to the reset lines for the PHY control
> +- reset-names: must be "phy"
one question on the resets:
- in v1 you had three reset lines: RESET_PCIE_CTRL_A, RESET_PCIE_PHY,
RESET_PCIE_APB
- in v2 you only have the "phy" reset line.
is this because the other two are connected to the PCIe controller
(Documentation/devicetree/bindings/pci/amlogic,meson-pcie.txt) instead
of the PHY?


Regards
Martin