On Fri, Oct 07, 2016 at 06:18:30PM +0300, Pantelis Antoniou wrote:
> From: Georgi Vlaev <gvlaev@xxxxxxxxxxx>
>
> Add DT bindings document for the SAM MFD device.
>
> Signed-off-by: Georgi Vlaev <gvlaev@xxxxxxxxxxx>
> [Ported from Juniper kernel]
> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@xxxxxxxxxxxx>
> ---
> Documentation/devicetree/bindings/mfd/jnx-sam.txt | 94 +++++++++++++++++++++++
> 1 file changed, 94 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mfd/jnx-sam.txt
>
> diff --git a/Documentation/devicetree/bindings/mfd/jnx-sam.txt b/Documentation/devicetree/bindings/mfd/jnx-sam.txt
> new file mode 100644
> index 0000000..b4af7ea
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/jnx-sam.txt
> @@ -0,0 +1,94 @@
> +Device-Tree bindings for Juniper Networks SAM MFD
> +
> +Required properties:
> +
> +- compatible - Must be: "jnx,sam"
Kind of generic. Only 1 FPGA version or some other way to tell the
version?
> +
> +Optional properties:
> +
> +- pma-coefficients: A set of tupples containing the configuration of the PMA.
What's a PMA? What type of configuration? How many entries?
> +Device Description
> +------ -----------
> +jnx,i2c-sam : I2C mux driver
> +jnx,gpio-sam : GPIO block
> +jnx,flash-sam : MTD Flash
> +jnx,mdio-sam : MDIO interfaces
> +
> +All these optional nodes are described in their respective binding
> +documents.
> +
> +Example node:
> +
> +pci-0000-10-00.0 {
What are the numbers?
> + compatible = "jnx,sam";
If this is a PCI device, then it should use PCI compatible string
syntax.
> + #address-cells = <1>;
> + #size-cells = <0>;
> + pma-coefficients = <4 0x0>;
> +
> + i2c-sam@10 {
> + compatible = "jnx,i2c-sam";
> + mux-channels = <2>;
> + master-offset = <0x10000>;
> + };
> +
> + gpiogpqam0: gpio-sam@10 {
gpio@...
Where does 10 come from?
> + compatible = "jnx,gpio-sam";
> + gpio-controller;
> + #gpio-cells = <2>;
> + gpio-count = <297>;
> + interrupt-controller;
> + /*
> + * 1st cell: gpio interrupt status bit
> + * 2nd cell: 1st pin
> + * 3rd cell: # of pins
> + */
> + gpio-interrupts =
> + <0 0 12>, /* phy_int_monitor_en [16] */
> + <1 235 24>, /* qsfpp_fpga_int_monitor [17] */
> + <2 259 24>, /* qsfpp_fpga_modprs_monitor [18] */
> + <3 295 1>, /* si5345_fpga_monitor [19] */
> + <4 294 1>; /* fpc_pic_int_monitor [20] */
> + };
> +
> + flash-sam@10 {
> + compatible = "jnx,flash-sam";
> + #address-cells = <1>;
> + #size-cells = <1>;
> + partition@0 {
> + reg = <0x0 0x400000>;
> + label = "pic0-golden";
> + read-only;
> + };
> + partition@400000 {
> + reg = <0x400000 0x400000>;
> + label = "pic0-user";
> + };
> + };
> +
> + mdio-sam@10 {
> + compatible = "jnx,mdio-sam";
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <0x40000>;
> +
> + /* mii_bus types */
> + mdio0: mdio-sam@0 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <0x0>;
> + };
> +
> + mdio1: mdio-sam@4000 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <0x4000>;
> + };
> +
> + mdio2: mdio-sam@8000 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <0x8000>;
> + };
> + };
> +};
> --
> 1.9.1
>
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