[v2,2/3] dt-bindings: pinctrl: Added binding for ZynqMP pinctrl driver

Added documentation and dt-bindings file which contains MIO pin
configuration defines for Xilinx ZynqMP pinctrl driver.

Signed-off-by: Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>
---
 .../bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml | 337 ++++++++++++++++++
 include/dt-bindings/pinctrl/pinctrl-zynqmp.h  |  23 ++
 2 files changed, 360 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
 create mode 100644 include/dt-bindings/pinctrl/pinctrl-zynqmp.h

On Tue, Jan 19, 2021 at 10:57:33AM +0530, Sai Krishna Potthuri wrote:
> Added documentation and dt-bindings file which contains MIO pin
> configuration defines for Xilinx ZynqMP pinctrl driver.
> 
> Signed-off-by: Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>
> ---
>  .../bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml | 337 ++++++++++++++++++
>  include/dt-bindings/pinctrl/pinctrl-zynqmp.h  |  23 ++
>  2 files changed, 360 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
>  create mode 100644 include/dt-bindings/pinctrl/pinctrl-zynqmp.h
> 
> diff --git a/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
> new file mode 100644
> index 000000000000..9f2efbafcaa4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
> @@ -0,0 +1,337 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pinctrl/xlnx,zynqmp-pinctrl.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Xilinx ZynqMP Pinctrl
> +
> +maintainers:
> +  - Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>
> +  - Rajan Vaja <rajan.vaja@xilinx.com>
> +
> +description: |
> +  Please refer to pinctrl-bindings.txt in this directory for details of the
> +  common pinctrl bindings used by client devices, including the meaning of the
> +  phrase "pin configuration node".
> +
> +  ZynqMP's pin configuration nodes act as a container for an arbitrary number of
> +  subnodes. Each of these subnodes represents some desired configuration for a
> +  pin, a group, or a list of pins or groups. This configuration can include the
> +  mux function to select on those pin(s)/group(s), and various pin configuration
> +  parameters, such as pull-up, slew rate, etc.
> +
> +  Each configuration node can consist of multiple nodes describing the pinmux and
> +  pinconf options. Those nodes can be pinmux nodes or pinconf nodes.
> +
> +  The name of each subnode is not important; all subnodes should be enumerated
> +  and processed purely based on their content.
> +
> +properties:
> +  compatible:
> +    const: xlnx,zynqmp-pinctrl
> +
> +patternProperties:
> +  '^(.*-)?(default|gpio)$':
> +    type: object
> +    patternProperties:
> +      '^mux(.*)$':

'^mux' is equivalent.

> +        type: object
> +        description:
> +          Pinctrl node's client devices use subnodes for pin muxes,
> +          which in turn use below standard properties.
> +        $ref: pinmux-node.yaml#
> +
> +        properties:
> +          groups:
> +            description:
> +              List of groups to select (either this or "pins" must be
> +              specified), available groups for this subnode.
> +            items:
> +              oneOf:
> +                - enum: [ethernet0_0_grp, ethernet1_0_grp, ethernet2_0_grp,

Don't need 'oneOf' for a single item.

> +                         ethernet3_0_grp, gemtsu0_0_grp, gemtsu0_1_grp,
> +                         gemtsu0_2_grp, mdio0_0_grp, mdio1_0_grp,
> +                         mdio1_1_grp, mdio2_0_grp, mdio3_0_grp,
> +                         qspi0_0_grp, qspi_ss_0_grp, qspi_fbclk_0_grp,
> +                         spi0_0_grp, spi0_ss_0_grp, spi0_ss_1_grp,
> +                         spi0_ss_2_grp, spi0_1_grp, spi0_ss_3_grp,
> +                         spi0_ss_4_grp, spi0_ss_5_grp, spi0_2_grp,
> +                         spi0_ss_6_grp, spi0_ss_7_grp, spi0_ss_8_grp,
> +                         spi0_3_grp, spi0_ss_9_grp, spi0_ss_10_grp,
> +                         spi0_ss_11_grp, spi0_4_grp, spi0_ss_12_grp,
> +                         spi0_ss_13_grp, spi0_ss_14_grp, spi0_5_grp,
> +                         spi0_ss_15_grp, spi0_ss_16_grp, spi0_ss_17_grp,
> +                         spi1_0_grp, spi1_ss_0_grp, spi1_ss_1_grp,
> +                         spi1_ss_2_grp, spi1_1_grp, spi1_ss_3_grp,
> +                         spi1_ss_4_grp, spi1_ss_5_grp, spi1_2_grp,
> +                         spi1_ss_6_grp, spi1_ss_7_grp, spi1_ss_8_grp,
> +                         spi1_3_grp, spi1_ss_9_grp, spi1_ss_10_grp,
> +                         spi1_ss_11_grp, spi1_4_grp, spi1_ss_12_grp,
> +                         spi1_ss_13_grp, spi1_ss_14_grp, spi1_5_grp,
> +                         spi1_ss_15_grp, spi1_ss_16_grp, spi1_ss_17_grp,
> +                         sdio0_0_grp, sdio0_1_grp, sdio0_2_grp,
> +                         sdio0_3_grp, sdio0_4_grp, sdio0_5_grp,
> +                         sdio0_6_grp, sdio0_7_grp, sdio0_8_grp,
> +                         sdio0_9_grp, sdio0_10_grp, sdio0_11_grp,
> +                         sdio0_12_grp, sdio0_13_grp, sdio0_14_grp,
> +                         sdio0_15_grp, sdio0_16_grp, sdio0_17_grp,
> +                         sdio0_18_grp, sdio0_19_grp, sdio0_20_grp,
> +                         sdio0_21_grp, sdio0_22_grp, sdio0_23_grp,
> +                         sdio0_24_grp, sdio0_25_grp, sdio0_26_grp,
> +                         sdio0_27_grp, sdio0_28_grp, sdio0_29_grp,
> +                         sdio0_30_grp, sdio0_31_grp, sdio0_32_grp,
> +                         sdio0_pc_0_grp, sdio0_cd_0_grp, sdio0_wp_0_grp,
> +                         sdio0_pc_1_grp, sdio0_cd_1_grp, sdio0_wp_1_grp,
> +                         sdio0_pc_2_grp, sdio0_cd_2_grp, sdio0_wp_2_grp,
> +                         sdio1_0_grp, sdio1_1_grp, sdio1_2_grp,
> +                         sdio1_3_grp, sdio1_4_grp, sdio1_5_grp,
> +                         sdio1_6_grp, sdio1_7_grp, sdio1_8_grp,
> +                         sdio1_9_grp, sdio1_10_grp, sdio1_11_grp,
> +                         sdio1_12_grp, sdio1_13_grp, sdio1_14_grp,
> +                         sdio1_15_grp, sdio1_pc_0_grp, sdio1_cd_0_grp,
> +                         sdio1_wp_0_grp, sdio1_pc_1_grp, sdio1_cd_1_grp,
> +                         sdio1_wp_1_grp, nand0_0_grp, nand0_ce_0_grp,
> +                         nand0_rb_0_grp, nand0_dqs_0_grp, nand0_ce_1_grp,
> +                         nand0_rb_1_grp, nand0_dqs_1_grp, can0_0_grp,
> +                         can0_1_grp, can0_2_grp, can0_3_grp,
> +                         can0_4_grp, can0_5_grp, can0_6_grp,
> +                         can0_7_grp, can0_8_grp, can0_9_grp,
> +                         can0_10_grp, can0_11_grp, can0_12_grp,
> +                         can0_13_grp, can0_14_grp, can0_15_grp,
> +                         can0_16_grp, can0_17_grp, can0_18_grp,
> +                         can1_0_grp, can1_1_grp, can1_2_grp,
> +                         can1_3_grp, can1_4_grp, can1_5_grp,
> +                         can1_6_grp, can1_7_grp, can1_8_grp,
> +                         can1_9_grp, can1_10_grp, can1_11_grp,
> +                         can1_12_grp, can1_13_grp, can1_14_grp,
> +                         can1_15_grp, can1_16_grp, can1_17_grp,
> +                         can1_18_grp, can1_19_grp, uart0_0_grp,
> +                         uart0_1_grp, uart0_2_grp, uart0_3_grp,
> +                         uart0_4_grp, uart0_5_grp, uart0_6_grp,
> +                         uart0_7_grp, uart0_8_grp, uart0_9_grp,
> +                         uart0_10_grp, uart0_11_grp, uart0_12_grp,
> +                         uart0_13_grp, uart0_14_grp, uart0_15_grp,
> +                         uart0_16_grp, uart0_17_grp, uart0_18_grp,
> +                         uart1_0_grp, uart1_1_grp, uart1_2_grp,
> +                         uart1_3_grp, uart1_4_grp, uart1_5_grp,
> +                         uart1_6_grp, uart1_7_grp, uart1_8_grp,
> +                         uart1_9_grp, uart1_10_grp, uart1_11_grp,
> +                         uart1_12_grp, uart1_13_grp, uart1_14_grp,
> +                         uart1_15_grp, uart1_16_grp, uart1_17_grp,
> +                         uart1_18_grp, i2c0_0_grp, i2c0_1_grp,
> +                         i2c0_2_grp, i2c0_3_grp, i2c0_4_grp,
> +                         i2c0_5_grp, i2c0_6_grp, i2c0_7_grp,
> +                         i2c0_8_grp, i2c0_9_grp, i2c0_10_grp,
> +                         i2c0_11_grp, i2c0_12_grp, i2c0_13_grp,
> +                         i2c0_14_grp, i2c0_15_grp, i2c0_16_grp,
> +                         i2c0_17_grp, i2c0_18_grp, i2c1_0_grp,
> +                         i2c1_1_grp, i2c1_2_grp, i2c1_3_grp,
> +                         i2c1_4_grp, i2c1_5_grp, i2c1_6_grp,
> +                         i2c1_7_grp, i2c1_8_grp, i2c1_9_grp,
> +                         i2c1_10_grp, i2c1_11_grp, i2c1_12_grp,
> +                         i2c1_13_grp, i2c1_14_grp, i2c1_15_grp,
> +                         i2c1_16_grp, i2c1_17_grp, i2c1_18_grp,
> +                         i2c1_19_grp, ttc0_clk_0_grp, ttc0_wav_0_grp,
> +                         ttc0_clk_1_grp, ttc0_wav_1_grp, ttc0_clk_2_grp,
> +                         ttc0_wav_2_grp, ttc0_clk_3_grp, ttc0_wav_3_grp,
> +                         ttc0_clk_4_grp, ttc0_wav_4_grp, ttc0_clk_5_grp,
> +                         ttc0_wav_5_grp, ttc0_clk_6_grp, ttc0_wav_6_grp,
> +                         ttc0_clk_7_grp, ttc0_wav_7_grp, ttc0_clk_8_grp,
> +                         ttc0_wav_8_grp, ttc1_clk_0_grp, ttc1_wav_0_grp,
> +                         ttc1_clk_1_grp, ttc1_wav_1_grp, ttc1_clk_2_grp,
> +                         ttc1_wav_2_grp, ttc1_clk_3_grp, ttc1_wav_3_grp,
> +                         ttc1_clk_4_grp, ttc1_wav_4_grp, ttc1_clk_5_grp,
> +                         ttc1_wav_5_grp, ttc1_clk_6_grp, ttc1_wav_6_grp,
> +                         ttc1_clk_7_grp, ttc1_wav_7_grp, ttc1_clk_8_grp,
> +                         ttc1_wav_8_grp, ttc2_clk_0_grp, ttc2_wav_0_grp,
> +                         ttc2_clk_1_grp, ttc2_wav_1_grp, ttc2_clk_2_grp,
> +                         ttc2_wav_2_grp, ttc2_clk_3_grp, ttc2_wav_3_grp,
> +                         ttc2_clk_4_grp, ttc2_wav_4_grp, ttc2_clk_5_grp,
> +                         ttc2_wav_5_grp, ttc2_clk_6_grp, ttc2_wav_6_grp,
> +                         ttc2_clk_7_grp, ttc2_wav_7_grp, ttc2_clk_8_grp,
> +                         ttc2_wav_8_grp, ttc3_clk_0_grp, ttc3_wav_0_grp,
> +                         ttc3_clk_1_grp, ttc3_wav_1_grp, ttc3_clk_2_grp,
> +                         ttc3_wav_2_grp, ttc3_clk_3_grp, ttc3_wav_3_grp,
> +                         ttc3_clk_4_grp, ttc3_wav_4_grp, ttc3_clk_5_grp,
> +                         ttc3_wav_5_grp, ttc3_clk_6_grp, ttc3_wav_6_grp,
> +                         ttc3_clk_7_grp, ttc3_wav_7_grp, ttc3_clk_8_grp,
> +                         ttc3_wav_8_grp, swdt0_clk_0_grp, swdt0_rst_0_grp,
> +                         swdt0_clk_1_grp, swdt0_rst_1_grp, swdt0_clk_2_grp,
> +                         swdt0_rst_2_grp, swdt0_clk_3_grp, swdt0_rst_3_grp,
> +                         swdt0_clk_4_grp, swdt0_rst_4_grp, swdt0_clk_5_grp,
> +                         swdt0_rst_5_grp, swdt0_clk_6_grp, swdt0_rst_6_grp,
> +                         swdt0_clk_7_grp, swdt0_rst_7_grp, swdt0_clk_8_grp,
> +                         swdt0_rst_8_grp, swdt0_clk_9_grp, swdt0_rst_9_grp,
> +                         swdt0_clk_10_grp, swdt0_rst_10_grp, swdt0_clk_11_grp,
> +                         swdt0_rst_11_grp, swdt0_clk_12_grp, swdt0_rst_12_grp,
> +                         swdt1_clk_0_grp, swdt1_rst_0_grp, swdt1_clk_1_grp,
> +                         swdt1_rst_1_grp, swdt1_clk_2_grp, swdt1_rst_2_grp,
> +                         swdt1_clk_3_grp, swdt1_rst_3_grp, swdt1_clk_4_grp,
> +                         swdt1_rst_4_grp, swdt1_clk_5_grp, swdt1_rst_5_grp,
> +                         swdt1_clk_6_grp, swdt1_rst_6_grp, swdt1_clk_7_grp,
> +                         swdt1_rst_7_grp, swdt1_clk_8_grp, swdt1_rst_8_grp,
> +                         swdt1_clk_9_grp, swdt1_rst_9_grp, swdt1_clk_10_grp,
> +                         swdt1_rst_10_grp, swdt1_clk_11_grp, swdt1_rst_11_grp,
> +                         swdt1_clk_12_grp, swdt1_rst_12_grp, gpio0_0_grp,
> +                         gpio0_1_grp, gpio0_2_grp, gpio0_3_grp,
> +                         gpio0_4_grp, gpio0_5_grp, gpio0_6_grp,
> +                         gpio0_7_grp, gpio0_8_grp, gpio0_9_grp,
> +                         gpio0_10_grp, gpio0_11_grp, gpio0_12_grp,
> +                         gpio0_13_grp, gpio0_14_grp, gpio0_15_grp,
> +                         gpio0_16_grp, gpio0_17_grp, gpio0_18_grp,
> +                         gpio0_19_grp, gpio0_20_grp, gpio0_21_grp,
> +                         gpio0_22_grp, gpio0_23_grp, gpio0_24_grp,
> +                         gpio0_25_grp, gpio0_26_grp, gpio0_27_grp,
> +                         gpio0_28_grp, gpio0_29_grp, gpio0_30_grp,
> +                         gpio0_31_grp, gpio0_32_grp, gpio0_33_grp,
> +                         gpio0_34_grp, gpio0_35_grp, gpio0_36_grp,
> +                         gpio0_37_grp, gpio0_38_grp, gpio0_39_grp,
> +                         gpio0_40_grp, gpio0_41_grp, gpio0_42_grp,
> +                         gpio0_43_grp, gpio0_44_grp, gpio0_45_grp,
> +                         gpio0_46_grp, gpio0_47_grp, gpio0_48_grp,
> +                         gpio0_49_grp, gpio0_50_grp, gpio0_51_grp,
> +                         gpio0_52_grp, gpio0_53_grp, gpio0_54_grp,
> +                         gpio0_55_grp, gpio0_56_grp, gpio0_57_grp,
> +                         gpio0_58_grp, gpio0_59_grp, gpio0_60_grp,
> +                         gpio0_61_grp, gpio0_62_grp, gpio0_63_grp,
> +                         gpio0_64_grp, gpio0_65_grp, gpio0_66_grp,
> +                         gpio0_67_grp, gpio0_68_grp, gpio0_69_grp,
> +                         gpio0_70_grp, gpio0_71_grp, gpio0_72_grp,
> +                         gpio0_73_grp, gpio0_74_grp, gpio0_75_grp,
> +                         gpio0_76_grp, gpio0_77_grp, usb0_0_grp,
> +                         usb1_0_grp, pmu0_0_grp, pmu0_1_grp,
> +                         pmu0_2_grp, pmu0_3_grp, pmu0_4_grp,
> +                         pmu0_5_grp, pmu0_6_grp, pmu0_7_grp,
> +                         pmu0_8_grp, pmu0_9_grp, pmu0_10_grp,
> +                         pmu0_11_grp, pcie0_0_grp, pcie0_1_grp,
> +                         pcie0_2_grp, pcie0_3_grp, pcie0_4_grp,
> +                         pcie0_5_grp, pcie0_6_grp, pcie0_7_grp,
> +                         csu0_0_grp, csu0_1_grp, csu0_2_grp,
> +                         csu0_3_grp, csu0_4_grp, csu0_5_grp,
> +                         csu0_6_grp, csu0_7_grp, csu0_8_grp,
> +                         csu0_9_grp, csu0_10_grp, csu0_11_grp,
> +                         dpaux0_0_grp, dpaux0_1_grp, dpaux0_2_grp,
> +                         dpaux0_3_grp, pjtag0_0_grp, pjtag0_1_grp,
> +                         pjtag0_2_grp, pjtag0_3_grp, pjtag0_4_grp,
> +                         pjtag0_5_grp, trace0_0_grp, trace0_clk_0_grp,
> +                         trace0_1_grp, trace0_clk_1_grp, trace0_2_grp,
> +                         trace0_clk_2_grp, testscan0_0_grp]
> +
> +          function:
> +            description:
> +              Specify the alternative function to be configured for the
> +              given pin groups.
> +            enum: [ethernet0, ethernet1, ethernet2, ethernet3, gemtsu0, usb0, usb1, mdio0,
> +                   mdio1, mdio2, mdio3, qspi0, qspi_fbclk, qspi_ss, spi0, spi1, spi0_ss,
> +                   spi1_ss, sdio0, sdio0_pc, sdio0_wp, sdio0_cd, sdio1, sdio1_pc, sdio1_wp,
> +                   sdio1_cd, nand0, nand0_ce, nand0_rb, nand0_dqs, can0, can1, uart0, uart1,
> +                   i2c0, i2c1, ttc0_clk, ttc0_wav, ttc1_clk, ttc1_wav, ttc2_clk, ttc2_wav,
> +                   ttc3_clk, ttc3_wav, swdt0_clk, swdt0_rst, swdt1_clk, swdt1_rst, gpio0, pmu0,
> +                   pcie0, csu0, dpaux0, pjtag0, trace0, trace0_clk, testscan0]
> +
> +        required:
> +          - groups
> +          - function
> +
> +        additionalProperties: false
> +
> +      '^conf(.*)$':

'^conf':

> +        type: object
> +        description:
> +          Pinctrl node's client devices use subnodes for pin configurations,
> +          which in turn use the standard properties below.
> +        $ref: pincfg-node.yaml#
> +
> +        properties:
> +          groups:
> +            description:
> +              List of pin groups as mentioned above (either this or "pins" must
> +              be specified).
> +
> +          pins:
> +            description:
> +              List of pin names to select in this subnode (either this or "groups" must
> +              be specified)

This can be expressed as:

oneOf:
  - required: [ groups ]
  - required: [ pins ]

> +            items:
> +              oneOf:

Can drop oneOf.

> +                - pattern: '^MIO([0-9]|[1-6][0-9]|7[0-7])$'
> +
> +          bias-pull-up: true
> +
> +          bias-pull-down: true
> +
> +          bias-disable: true
> +
> +          input-schmitt-enable: true
> +
> +          input-schmitt-disable: true
> +
> +          bias-high-impedance: true
> +
> +          low-power-enable: true
> +
> +          low-power-disable: true
> +
> +          slew-rate:
> +            enum: [0, 1]
> +
> +          drive-strength:
> +            description:
> +              Selects the drive strength for MIO pins, in mA.
> +            enum: [2, 4, 8, 12]
> +
> +          io-standard:
> +            description:
> +              Selects the IO standard for MIO pins, this is driver specific.
> +            $ref: "/schemas/types.yaml#/definitions/uint32"
> +            enum: [0, 1]
> +
> +        additionalProperties: false
> +
> +    additionalProperties: false
> +
> +required:
> +  - compatible
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/pinctrl/pinctrl-zynqmp.h>
> +    zynqmp_firmware: zynqmp-firmware {
> +        pinctrl0: pinctrl {
> +          compatible = "xlnx,zynqmp-pinctrl";
> +
> +          pinctrl_uart1_default: uart1-default {
> +             mux {
> +                 groups = "uart0_4_grp", "uart0_5_grp";
> +                 function = "uart0";
> +             };
> +
> +             conf {
> +                groups = "uart0_4_grp";
> +                slew-rate = <SLEW_RATE_SLOW>;
> +                io-standard = <IO_STANDARD_LVCMOS18>;
> +             };
> +
> +             conf-rx {
> +                pins = "MIO18";
> +                bias-pull-up;
> +             };
> +
> +             conf-tx {
> +                pins = "MIO19";
> +                bias-disable;
> +                input-schmitt-disable;
> +             };
> +          };
> +        };
> +    };
> +
> +    uart1 {
> +         pinctrl-names = "default";
> +         pinctrl-0 = <&pinctrl_uart1_default>;
> +    };
> +
> +...
> diff --git a/include/dt-bindings/pinctrl/pinctrl-zynqmp.h b/include/dt-bindings/pinctrl/pinctrl-zynqmp.h
> new file mode 100644
> index 000000000000..b73b0ae2f90b
> --- /dev/null
> +++ b/include/dt-bindings/pinctrl/pinctrl-zynqmp.h
> @@ -0,0 +1,23 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * MIO pin configuration defines for Xilinx ZynqMP
> + *
> + * Copyright (C) 2020 Xilinx, Inc.
> + */
> +
> +#ifndef _DT_BINDINGS_PINCTRL_ZYNQMP_H
> +#define _DT_BINDINGS_PINCTRL_ZYNQMP_H
> +
> +/* Bit value for IO standards */
> +#define IO_STANDARD_LVCMOS33	0
> +#define IO_STANDARD_LVCMOS18	1
> +
> +/* Bit values for Slew Rates */
> +#define SLEW_RATE_FAST		0
> +#define SLEW_RATE_SLOW		1
> +
> +/* Bit values for Pin inputs */
> +#define PIN_INPUT_TYPE_CMOS	0
> +#define PIN_INPUT_TYPE_SCHMITT	1

Still used?

> +
> +#endif /* _DT_BINDINGS_PINCTRL_ZYNQMP_H */
> -- 
> 2.17.1
>

Hi Rob,

Thanks for the review.

> -----Original Message-----
> From: Rob Herring <robh@kernel.org>
> Sent: Tuesday, February 9, 2021 7:51 AM
> To: Sai Krishna Potthuri <lakshmis@xilinx.com>
> Cc: Linus Walleij <linus.walleij@linaro.org>; Michal Simek
> <michals@xilinx.com>; Greg Kroah-Hartman <gregkh@linuxfoundation.org>;
> linux-arm-kernel@lists.infradead.org; linux-kernel@vger.kernel.org;
> devicetree@vger.kernel.org; linux-gpio@vger.kernel.org; git
> <git@xilinx.com>; saikrishna12468@gmail.com
> Subject: Re: [PATCH v2 2/3] dt-bindings: pinctrl: Added binding for ZynqMP
> pinctrl driver
> 
> On Tue, Jan 19, 2021 at 10:57:33AM +0530, Sai Krishna Potthuri wrote:
> > Added documentation and dt-bindings file which contains MIO pin
> > configuration defines for Xilinx ZynqMP pinctrl driver.
> >
> > Signed-off-by: Sai Krishna Potthuri
> > <lakshmi.sai.krishna.potthuri@xilinx.com>
> > ---
> >  .../bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml | 337
> > ++++++++++++++++++  include/dt-bindings/pinctrl/pinctrl-zynqmp.h  |
> > 23 ++
> >  2 files changed, 360 insertions(+)
> >  create mode 100644
> > Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
> >  create mode 100644 include/dt-bindings/pinctrl/pinctrl-zynqmp.h
> >
> > diff --git
> > a/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
> > b/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
> > new file mode 100644
> > index 000000000000..9f2efbafcaa4
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.ya
> > +++ ml
> > @@ -0,0 +1,337 @@
> > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause %YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/pinctrl/xlnx,zynqmp-pinctrl.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Xilinx ZynqMP Pinctrl
> > +
> > +maintainers:
> > +  - Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>
> > +  - Rajan Vaja <rajan.vaja@xilinx.com>
> > +
> > +description: |
> > +  Please refer to pinctrl-bindings.txt in this directory for details
> > +of the
> > +  common pinctrl bindings used by client devices, including the
> > +meaning of the
> > +  phrase "pin configuration node".
> > +
> > +  ZynqMP's pin configuration nodes act as a container for an
> > + arbitrary number of  subnodes. Each of these subnodes represents
> > + some desired configuration for a  pin, a group, or a list of pins or
> > + groups. This configuration can include the  mux function to select
> > + on those pin(s)/group(s), and various pin configuration  parameters, such
> as pull-up, slew rate, etc.
> > +
> > +  Each configuration node can consist of multiple nodes describing
> > + the pinmux and  pinconf options. Those nodes can be pinmux nodes or
> pinconf nodes.
> > +
> > +  The name of each subnode is not important; all subnodes should be
> > + enumerated  and processed purely based on their content.
> > +
> > +properties:
> > +  compatible:
> > +    const: xlnx,zynqmp-pinctrl
> > +
> > +patternProperties:
> > +  '^(.*-)?(default|gpio)$':
> > +    type: object
> > +    patternProperties:
> > +      '^mux(.*)$':
> 
> '^mux' is equivalent.
I will fix in v3.

> 
> > +        type: object
> > +        description:
> > +          Pinctrl node's client devices use subnodes for pin muxes,
> > +          which in turn use below standard properties.
> > +        $ref: pinmux-node.yaml#
> > +
> > +        properties:
> > +          groups:
> > +            description:
> > +              List of groups to select (either this or "pins" must be
> > +              specified), available groups for this subnode.
> > +            items:
> > +              oneOf:
> > +                - enum: [ethernet0_0_grp, ethernet1_0_grp,
> > + ethernet2_0_grp,
> 
> Don't need 'oneOf' for a single item.
Here we have a possibility to have more than one group item as below,
hence used 'oneOf'.
groups = "uart0_4_grp", "uart0_5_grp";
Please suggest me if there is a better/another way to represent this.

> 
> > +                         ethernet3_0_grp, gemtsu0_0_grp, gemtsu0_1_grp,
> > +                         gemtsu0_2_grp, mdio0_0_grp, mdio1_0_grp,
> > +                         mdio1_1_grp, mdio2_0_grp, mdio3_0_grp,
> > +                         qspi0_0_grp, qspi_ss_0_grp, qspi_fbclk_0_grp,
> > +                         spi0_0_grp, spi0_ss_0_grp, spi0_ss_1_grp,
> > +                         spi0_ss_2_grp, spi0_1_grp, spi0_ss_3_grp,
> > +                         spi0_ss_4_grp, spi0_ss_5_grp, spi0_2_grp,
> > +                         spi0_ss_6_grp, spi0_ss_7_grp, spi0_ss_8_grp,
> > +                         spi0_3_grp, spi0_ss_9_grp, spi0_ss_10_grp,
> > +                         spi0_ss_11_grp, spi0_4_grp, spi0_ss_12_grp,
> > +                         spi0_ss_13_grp, spi0_ss_14_grp, spi0_5_grp,
> > +                         spi0_ss_15_grp, spi0_ss_16_grp, spi0_ss_17_grp,
> > +                         spi1_0_grp, spi1_ss_0_grp, spi1_ss_1_grp,
> > +                         spi1_ss_2_grp, spi1_1_grp, spi1_ss_3_grp,
> > +                         spi1_ss_4_grp, spi1_ss_5_grp, spi1_2_grp,
> > +                         spi1_ss_6_grp, spi1_ss_7_grp, spi1_ss_8_grp,
> > +                         spi1_3_grp, spi1_ss_9_grp, spi1_ss_10_grp,
> > +                         spi1_ss_11_grp, spi1_4_grp, spi1_ss_12_grp,
> > +                         spi1_ss_13_grp, spi1_ss_14_grp, spi1_5_grp,
> > +                         spi1_ss_15_grp, spi1_ss_16_grp, spi1_ss_17_grp,
> > +                         sdio0_0_grp, sdio0_1_grp, sdio0_2_grp,
> > +                         sdio0_3_grp, sdio0_4_grp, sdio0_5_grp,
> > +                         sdio0_6_grp, sdio0_7_grp, sdio0_8_grp,
> > +                         sdio0_9_grp, sdio0_10_grp, sdio0_11_grp,
> > +                         sdio0_12_grp, sdio0_13_grp, sdio0_14_grp,
> > +                         sdio0_15_grp, sdio0_16_grp, sdio0_17_grp,
> > +                         sdio0_18_grp, sdio0_19_grp, sdio0_20_grp,
> > +                         sdio0_21_grp, sdio0_22_grp, sdio0_23_grp,
> > +                         sdio0_24_grp, sdio0_25_grp, sdio0_26_grp,
> > +                         sdio0_27_grp, sdio0_28_grp, sdio0_29_grp,
> > +                         sdio0_30_grp, sdio0_31_grp, sdio0_32_grp,
> > +                         sdio0_pc_0_grp, sdio0_cd_0_grp, sdio0_wp_0_grp,
> > +                         sdio0_pc_1_grp, sdio0_cd_1_grp, sdio0_wp_1_grp,
> > +                         sdio0_pc_2_grp, sdio0_cd_2_grp, sdio0_wp_2_grp,
> > +                         sdio1_0_grp, sdio1_1_grp, sdio1_2_grp,
> > +                         sdio1_3_grp, sdio1_4_grp, sdio1_5_grp,
> > +                         sdio1_6_grp, sdio1_7_grp, sdio1_8_grp,
> > +                         sdio1_9_grp, sdio1_10_grp, sdio1_11_grp,
> > +                         sdio1_12_grp, sdio1_13_grp, sdio1_14_grp,
> > +                         sdio1_15_grp, sdio1_pc_0_grp, sdio1_cd_0_grp,
> > +                         sdio1_wp_0_grp, sdio1_pc_1_grp, sdio1_cd_1_grp,
> > +                         sdio1_wp_1_grp, nand0_0_grp, nand0_ce_0_grp,
> > +                         nand0_rb_0_grp, nand0_dqs_0_grp, nand0_ce_1_grp,
> > +                         nand0_rb_1_grp, nand0_dqs_1_grp, can0_0_grp,
> > +                         can0_1_grp, can0_2_grp, can0_3_grp,
> > +                         can0_4_grp, can0_5_grp, can0_6_grp,
> > +                         can0_7_grp, can0_8_grp, can0_9_grp,
> > +                         can0_10_grp, can0_11_grp, can0_12_grp,
> > +                         can0_13_grp, can0_14_grp, can0_15_grp,
> > +                         can0_16_grp, can0_17_grp, can0_18_grp,
> > +                         can1_0_grp, can1_1_grp, can1_2_grp,
> > +                         can1_3_grp, can1_4_grp, can1_5_grp,
> > +                         can1_6_grp, can1_7_grp, can1_8_grp,
> > +                         can1_9_grp, can1_10_grp, can1_11_grp,
> > +                         can1_12_grp, can1_13_grp, can1_14_grp,
> > +                         can1_15_grp, can1_16_grp, can1_17_grp,
> > +                         can1_18_grp, can1_19_grp, uart0_0_grp,
> > +                         uart0_1_grp, uart0_2_grp, uart0_3_grp,
> > +                         uart0_4_grp, uart0_5_grp, uart0_6_grp,
> > +                         uart0_7_grp, uart0_8_grp, uart0_9_grp,
> > +                         uart0_10_grp, uart0_11_grp, uart0_12_grp,
> > +                         uart0_13_grp, uart0_14_grp, uart0_15_grp,
> > +                         uart0_16_grp, uart0_17_grp, uart0_18_grp,
> > +                         uart1_0_grp, uart1_1_grp, uart1_2_grp,
> > +                         uart1_3_grp, uart1_4_grp, uart1_5_grp,
> > +                         uart1_6_grp, uart1_7_grp, uart1_8_grp,
> > +                         uart1_9_grp, uart1_10_grp, uart1_11_grp,
> > +                         uart1_12_grp, uart1_13_grp, uart1_14_grp,
> > +                         uart1_15_grp, uart1_16_grp, uart1_17_grp,
> > +                         uart1_18_grp, i2c0_0_grp, i2c0_1_grp,
> > +                         i2c0_2_grp, i2c0_3_grp, i2c0_4_grp,
> > +                         i2c0_5_grp, i2c0_6_grp, i2c0_7_grp,
> > +                         i2c0_8_grp, i2c0_9_grp, i2c0_10_grp,
> > +                         i2c0_11_grp, i2c0_12_grp, i2c0_13_grp,
> > +                         i2c0_14_grp, i2c0_15_grp, i2c0_16_grp,
> > +                         i2c0_17_grp, i2c0_18_grp, i2c1_0_grp,
> > +                         i2c1_1_grp, i2c1_2_grp, i2c1_3_grp,
> > +                         i2c1_4_grp, i2c1_5_grp, i2c1_6_grp,
> > +                         i2c1_7_grp, i2c1_8_grp, i2c1_9_grp,
> > +                         i2c1_10_grp, i2c1_11_grp, i2c1_12_grp,
> > +                         i2c1_13_grp, i2c1_14_grp, i2c1_15_grp,
> > +                         i2c1_16_grp, i2c1_17_grp, i2c1_18_grp,
> > +                         i2c1_19_grp, ttc0_clk_0_grp, ttc0_wav_0_grp,
> > +                         ttc0_clk_1_grp, ttc0_wav_1_grp, ttc0_clk_2_grp,
> > +                         ttc0_wav_2_grp, ttc0_clk_3_grp, ttc0_wav_3_grp,
> > +                         ttc0_clk_4_grp, ttc0_wav_4_grp, ttc0_clk_5_grp,
> > +                         ttc0_wav_5_grp, ttc0_clk_6_grp, ttc0_wav_6_grp,
> > +                         ttc0_clk_7_grp, ttc0_wav_7_grp, ttc0_clk_8_grp,
> > +                         ttc0_wav_8_grp, ttc1_clk_0_grp, ttc1_wav_0_grp,
> > +                         ttc1_clk_1_grp, ttc1_wav_1_grp, ttc1_clk_2_grp,
> > +                         ttc1_wav_2_grp, ttc1_clk_3_grp, ttc1_wav_3_grp,
> > +                         ttc1_clk_4_grp, ttc1_wav_4_grp, ttc1_clk_5_grp,
> > +                         ttc1_wav_5_grp, ttc1_clk_6_grp, ttc1_wav_6_grp,
> > +                         ttc1_clk_7_grp, ttc1_wav_7_grp, ttc1_clk_8_grp,
> > +                         ttc1_wav_8_grp, ttc2_clk_0_grp, ttc2_wav_0_grp,
> > +                         ttc2_clk_1_grp, ttc2_wav_1_grp, ttc2_clk_2_grp,
> > +                         ttc2_wav_2_grp, ttc2_clk_3_grp, ttc2_wav_3_grp,
> > +                         ttc2_clk_4_grp, ttc2_wav_4_grp, ttc2_clk_5_grp,
> > +                         ttc2_wav_5_grp, ttc2_clk_6_grp, ttc2_wav_6_grp,
> > +                         ttc2_clk_7_grp, ttc2_wav_7_grp, ttc2_clk_8_grp,
> > +                         ttc2_wav_8_grp, ttc3_clk_0_grp, ttc3_wav_0_grp,
> > +                         ttc3_clk_1_grp, ttc3_wav_1_grp, ttc3_clk_2_grp,
> > +                         ttc3_wav_2_grp, ttc3_clk_3_grp, ttc3_wav_3_grp,
> > +                         ttc3_clk_4_grp, ttc3_wav_4_grp, ttc3_clk_5_grp,
> > +                         ttc3_wav_5_grp, ttc3_clk_6_grp, ttc3_wav_6_grp,
> > +                         ttc3_clk_7_grp, ttc3_wav_7_grp, ttc3_clk_8_grp,
> > +                         ttc3_wav_8_grp, swdt0_clk_0_grp, swdt0_rst_0_grp,
> > +                         swdt0_clk_1_grp, swdt0_rst_1_grp, swdt0_clk_2_grp,
> > +                         swdt0_rst_2_grp, swdt0_clk_3_grp, swdt0_rst_3_grp,
> > +                         swdt0_clk_4_grp, swdt0_rst_4_grp, swdt0_clk_5_grp,
> > +                         swdt0_rst_5_grp, swdt0_clk_6_grp, swdt0_rst_6_grp,
> > +                         swdt0_clk_7_grp, swdt0_rst_7_grp, swdt0_clk_8_grp,
> > +                         swdt0_rst_8_grp, swdt0_clk_9_grp, swdt0_rst_9_grp,
> > +                         swdt0_clk_10_grp, swdt0_rst_10_grp, swdt0_clk_11_grp,
> > +                         swdt0_rst_11_grp, swdt0_clk_12_grp, swdt0_rst_12_grp,
> > +                         swdt1_clk_0_grp, swdt1_rst_0_grp, swdt1_clk_1_grp,
> > +                         swdt1_rst_1_grp, swdt1_clk_2_grp, swdt1_rst_2_grp,
> > +                         swdt1_clk_3_grp, swdt1_rst_3_grp, swdt1_clk_4_grp,
> > +                         swdt1_rst_4_grp, swdt1_clk_5_grp, swdt1_rst_5_grp,
> > +                         swdt1_clk_6_grp, swdt1_rst_6_grp, swdt1_clk_7_grp,
> > +                         swdt1_rst_7_grp, swdt1_clk_8_grp, swdt1_rst_8_grp,
> > +                         swdt1_clk_9_grp, swdt1_rst_9_grp, swdt1_clk_10_grp,
> > +                         swdt1_rst_10_grp, swdt1_clk_11_grp, swdt1_rst_11_grp,
> > +                         swdt1_clk_12_grp, swdt1_rst_12_grp, gpio0_0_grp,
> > +                         gpio0_1_grp, gpio0_2_grp, gpio0_3_grp,
> > +                         gpio0_4_grp, gpio0_5_grp, gpio0_6_grp,
> > +                         gpio0_7_grp, gpio0_8_grp, gpio0_9_grp,
> > +                         gpio0_10_grp, gpio0_11_grp, gpio0_12_grp,
> > +                         gpio0_13_grp, gpio0_14_grp, gpio0_15_grp,
> > +                         gpio0_16_grp, gpio0_17_grp, gpio0_18_grp,
> > +                         gpio0_19_grp, gpio0_20_grp, gpio0_21_grp,
> > +                         gpio0_22_grp, gpio0_23_grp, gpio0_24_grp,
> > +                         gpio0_25_grp, gpio0_26_grp, gpio0_27_grp,
> > +                         gpio0_28_grp, gpio0_29_grp, gpio0_30_grp,
> > +                         gpio0_31_grp, gpio0_32_grp, gpio0_33_grp,
> > +                         gpio0_34_grp, gpio0_35_grp, gpio0_36_grp,
> > +                         gpio0_37_grp, gpio0_38_grp, gpio0_39_grp,
> > +                         gpio0_40_grp, gpio0_41_grp, gpio0_42_grp,
> > +                         gpio0_43_grp, gpio0_44_grp, gpio0_45_grp,
> > +                         gpio0_46_grp, gpio0_47_grp, gpio0_48_grp,
> > +                         gpio0_49_grp, gpio0_50_grp, gpio0_51_grp,
> > +                         gpio0_52_grp, gpio0_53_grp, gpio0_54_grp,
> > +                         gpio0_55_grp, gpio0_56_grp, gpio0_57_grp,
> > +                         gpio0_58_grp, gpio0_59_grp, gpio0_60_grp,
> > +                         gpio0_61_grp, gpio0_62_grp, gpio0_63_grp,
> > +                         gpio0_64_grp, gpio0_65_grp, gpio0_66_grp,
> > +                         gpio0_67_grp, gpio0_68_grp, gpio0_69_grp,
> > +                         gpio0_70_grp, gpio0_71_grp, gpio0_72_grp,
> > +                         gpio0_73_grp, gpio0_74_grp, gpio0_75_grp,
> > +                         gpio0_76_grp, gpio0_77_grp, usb0_0_grp,
> > +                         usb1_0_grp, pmu0_0_grp, pmu0_1_grp,
> > +                         pmu0_2_grp, pmu0_3_grp, pmu0_4_grp,
> > +                         pmu0_5_grp, pmu0_6_grp, pmu0_7_grp,
> > +                         pmu0_8_grp, pmu0_9_grp, pmu0_10_grp,
> > +                         pmu0_11_grp, pcie0_0_grp, pcie0_1_grp,
> > +                         pcie0_2_grp, pcie0_3_grp, pcie0_4_grp,
> > +                         pcie0_5_grp, pcie0_6_grp, pcie0_7_grp,
> > +                         csu0_0_grp, csu0_1_grp, csu0_2_grp,
> > +                         csu0_3_grp, csu0_4_grp, csu0_5_grp,
> > +                         csu0_6_grp, csu0_7_grp, csu0_8_grp,
> > +                         csu0_9_grp, csu0_10_grp, csu0_11_grp,
> > +                         dpaux0_0_grp, dpaux0_1_grp, dpaux0_2_grp,
> > +                         dpaux0_3_grp, pjtag0_0_grp, pjtag0_1_grp,
> > +                         pjtag0_2_grp, pjtag0_3_grp, pjtag0_4_grp,
> > +                         pjtag0_5_grp, trace0_0_grp, trace0_clk_0_grp,
> > +                         trace0_1_grp, trace0_clk_1_grp, trace0_2_grp,
> > +                         trace0_clk_2_grp, testscan0_0_grp]
> > +
> > +          function:
> > +            description:
> > +              Specify the alternative function to be configured for the
> > +              given pin groups.
> > +            enum: [ethernet0, ethernet1, ethernet2, ethernet3, gemtsu0, usb0,
> usb1, mdio0,
> > +                   mdio1, mdio2, mdio3, qspi0, qspi_fbclk, qspi_ss, spi0, spi1,
> spi0_ss,
> > +                   spi1_ss, sdio0, sdio0_pc, sdio0_wp, sdio0_cd, sdio1, sdio1_pc,
> sdio1_wp,
> > +                   sdio1_cd, nand0, nand0_ce, nand0_rb, nand0_dqs, can0, can1,
> uart0, uart1,
> > +                   i2c0, i2c1, ttc0_clk, ttc0_wav, ttc1_clk, ttc1_wav, ttc2_clk,
> ttc2_wav,
> > +                   ttc3_clk, ttc3_wav, swdt0_clk, swdt0_rst, swdt1_clk, swdt1_rst,
> gpio0, pmu0,
> > +                   pcie0, csu0, dpaux0, pjtag0, trace0, trace0_clk,
> > + testscan0]
> > +
> > +        required:
> > +          - groups
> > +          - function
> > +
> > +        additionalProperties: false
> > +
> > +      '^conf(.*)$':
> 
> '^conf':
I will fix in v3.

> 
> > +        type: object
> > +        description:
> > +          Pinctrl node's client devices use subnodes for pin configurations,
> > +          which in turn use the standard properties below.
> > +        $ref: pincfg-node.yaml#
> > +
> > +        properties:
> > +          groups:
> > +            description:
> > +              List of pin groups as mentioned above (either this or "pins" must
> > +              be specified).
> > +
> > +          pins:
> > +            description:
> > +              List of pin names to select in this subnode (either this or "groups"
> must
> > +              be specified)
> 
> This can be expressed as:
> 
> oneOf:
>   - required: [ groups ]
>   - required: [ pins ]
I will use this in v3.

> 
> > +            items:
> > +              oneOf:
> 
> Can drop oneOf.
Similar to groups, we can have more than one pin item as below 
pins = "MIO52", "MIO53", "MIO55"
Please suggest me if there is a better/another way to represent this.

> 
> > +                - pattern: '^MIO([0-9]|[1-6][0-9]|7[0-7])$'
> > +
> > +          bias-pull-up: true
> > +
> > +          bias-pull-down: true
> > +
> > +          bias-disable: true
> > +
> > +          input-schmitt-enable: true
> > +
> > +          input-schmitt-disable: true
> > +
> > +          bias-high-impedance: true
> > +
> > +          low-power-enable: true
> > +
> > +          low-power-disable: true
> > +
> > +          slew-rate:
> > +            enum: [0, 1]
> > +
> > +          drive-strength:
> > +            description:
> > +              Selects the drive strength for MIO pins, in mA.
> > +            enum: [2, 4, 8, 12]
> > +
> > +          io-standard:
> > +            description:
> > +              Selects the IO standard for MIO pins, this is driver specific.
> > +            $ref: "/schemas/types.yaml#/definitions/uint32"
> > +            enum: [0, 1]
> > +
> > +        additionalProperties: false
> > +
> > +    additionalProperties: false
> > +
> > +required:
> > +  - compatible
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/pinctrl/pinctrl-zynqmp.h>
> > +    zynqmp_firmware: zynqmp-firmware {
> > +        pinctrl0: pinctrl {
> > +          compatible = "xlnx,zynqmp-pinctrl";
> > +
> > +          pinctrl_uart1_default: uart1-default {
> > +             mux {
> > +                 groups = "uart0_4_grp", "uart0_5_grp";
> > +                 function = "uart0";
> > +             };
> > +
> > +             conf {
> > +                groups = "uart0_4_grp";
> > +                slew-rate = <SLEW_RATE_SLOW>;
> > +                io-standard = <IO_STANDARD_LVCMOS18>;
> > +             };
> > +
> > +             conf-rx {
> > +                pins = "MIO18";
> > +                bias-pull-up;
> > +             };
> > +
> > +             conf-tx {
> > +                pins = "MIO19";
> > +                bias-disable;
> > +                input-schmitt-disable;
> > +             };
> > +          };
> > +        };
> > +    };
> > +
> > +    uart1 {
> > +         pinctrl-names = "default";
> > +         pinctrl-0 = <&pinctrl_uart1_default>;
> > +    };
> > +
> > +...
> > diff --git a/include/dt-bindings/pinctrl/pinctrl-zynqmp.h
> > b/include/dt-bindings/pinctrl/pinctrl-zynqmp.h
> > new file mode 100644
> > index 000000000000..b73b0ae2f90b
> > --- /dev/null
> > +++ b/include/dt-bindings/pinctrl/pinctrl-zynqmp.h
> > @@ -0,0 +1,23 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * MIO pin configuration defines for Xilinx ZynqMP
> > + *
> > + * Copyright (C) 2020 Xilinx, Inc.
> > + */
> > +
> > +#ifndef _DT_BINDINGS_PINCTRL_ZYNQMP_H #define
> > +_DT_BINDINGS_PINCTRL_ZYNQMP_H
> > +
> > +/* Bit value for IO standards */
> > +#define IO_STANDARD_LVCMOS33	0
> > +#define IO_STANDARD_LVCMOS18	1
> > +
> > +/* Bit values for Slew Rates */
> > +#define SLEW_RATE_FAST		0
> > +#define SLEW_RATE_SLOW		1
> > +
> > +/* Bit values for Pin inputs */
> > +#define PIN_INPUT_TYPE_CMOS	0
> > +#define PIN_INPUT_TYPE_SCHMITT	1
> 
> Still used?
I will fix in v3.

Regards
Sai Krishna
> 
> > +
> > +#endif /* _DT_BINDINGS_PINCTRL_ZYNQMP_H */
> > --
> > 2.17.1
> >

On Tue, Feb 9, 2021 at 2:17 AM Sai Krishna Potthuri <lakshmis@xilinx.com> wrote:
>
> Hi Rob,
>
> Thanks for the review.
>
> > -----Original Message-----
> > From: Rob Herring <robh@kernel.org>
> > Sent: Tuesday, February 9, 2021 7:51 AM
> > To: Sai Krishna Potthuri <lakshmis@xilinx.com>
> > Cc: Linus Walleij <linus.walleij@linaro.org>; Michal Simek
> > <michals@xilinx.com>; Greg Kroah-Hartman <gregkh@linuxfoundation.org>;
> > linux-arm-kernel@lists.infradead.org; linux-kernel@vger.kernel.org;
> > devicetree@vger.kernel.org; linux-gpio@vger.kernel.org; git
> > <git@xilinx.com>; saikrishna12468@gmail.com
> > Subject: Re: [PATCH v2 2/3] dt-bindings: pinctrl: Added binding for ZynqMP
> > pinctrl driver
> >
> > On Tue, Jan 19, 2021 at 10:57:33AM +0530, Sai Krishna Potthuri wrote:
> > > Added documentation and dt-bindings file which contains MIO pin
> > > configuration defines for Xilinx ZynqMP pinctrl driver.
> > >
> > > Signed-off-by: Sai Krishna Potthuri
> > > <lakshmi.sai.krishna.potthuri@xilinx.com>
> > > ---
> > >  .../bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml | 337
> > > ++++++++++++++++++  include/dt-bindings/pinctrl/pinctrl-zynqmp.h  |
> > > 23 ++
> > >  2 files changed, 360 insertions(+)
> > >  create mode 100644
> > > Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
> > >  create mode 100644 include/dt-bindings/pinctrl/pinctrl-zynqmp.h
> > >
> > > diff --git
> > > a/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
> > > b/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
> > > new file mode 100644
> > > index 000000000000..9f2efbafcaa4
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.ya
> > > +++ ml
> > > @@ -0,0 +1,337 @@
> > > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause %YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/pinctrl/xlnx,zynqmp-pinctrl.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Xilinx ZynqMP Pinctrl
> > > +
> > > +maintainers:
> > > +  - Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>
> > > +  - Rajan Vaja <rajan.vaja@xilinx.com>
> > > +
> > > +description: |
> > > +  Please refer to pinctrl-bindings.txt in this directory for details
> > > +of the
> > > +  common pinctrl bindings used by client devices, including the
> > > +meaning of the
> > > +  phrase "pin configuration node".
> > > +
> > > +  ZynqMP's pin configuration nodes act as a container for an
> > > + arbitrary number of  subnodes. Each of these subnodes represents
> > > + some desired configuration for a  pin, a group, or a list of pins or
> > > + groups. This configuration can include the  mux function to select
> > > + on those pin(s)/group(s), and various pin configuration  parameters, such
> > as pull-up, slew rate, etc.
> > > +
> > > +  Each configuration node can consist of multiple nodes describing
> > > + the pinmux and  pinconf options. Those nodes can be pinmux nodes or
> > pinconf nodes.
> > > +
> > > +  The name of each subnode is not important; all subnodes should be
> > > + enumerated  and processed purely based on their content.
> > > +
> > > +properties:
> > > +  compatible:
> > > +    const: xlnx,zynqmp-pinctrl
> > > +
> > > +patternProperties:
> > > +  '^(.*-)?(default|gpio)$':
> > > +    type: object
> > > +    patternProperties:
> > > +      '^mux(.*)$':
> >
> > '^mux' is equivalent.
> I will fix in v3.
>
> >
> > > +        type: object
> > > +        description:
> > > +          Pinctrl node's client devices use subnodes for pin muxes,
> > > +          which in turn use below standard properties.
> > > +        $ref: pinmux-node.yaml#
> > > +
> > > +        properties:
> > > +          groups:
> > > +            description:
> > > +              List of groups to select (either this or "pins" must be
> > > +              specified), available groups for this subnode.
> > > +            items:
> > > +              oneOf:
> > > +                - enum: [ethernet0_0_grp, ethernet1_0_grp,
> > > + ethernet2_0_grp,
> >
> > Don't need 'oneOf' for a single item.
> Here we have a possibility to have more than one group item as below,
> hence used 'oneOf'.
> groups = "uart0_4_grp", "uart0_5_grp";
> Please suggest me if there is a better/another way to represent this.

'items' has 2 forms: a list with a schema per entry or a schema that
applies to all entries.

1 item:
items:
  - enum: [...]

all items:
items:
  enum: [...]

You should use the latter form. You may need 'maxItems' here. Pick a
'should be enough' value if you don't have an actual max.

Rob

Hi Rob,

> -----Original Message-----
> From: Rob Herring <robh@kernel.org>
> Sent: Tuesday, February 9, 2021 7:27 PM
> To: Sai Krishna Potthuri <lakshmis@xilinx.com>
> Cc: Linus Walleij <linus.walleij@linaro.org>; Michal Simek
> <michals@xilinx.com>; Greg Kroah-Hartman <gregkh@linuxfoundation.org>;
> linux-arm-kernel@lists.infradead.org; linux-kernel@vger.kernel.org;
> devicetree@vger.kernel.org; linux-gpio@vger.kernel.org; git
> <git@xilinx.com>; saikrishna12468@gmail.com
> Subject: Re: [PATCH v2 2/3] dt-bindings: pinctrl: Added binding for ZynqMP
> pinctrl driver
> 
> On Tue, Feb 9, 2021 at 2:17 AM Sai Krishna Potthuri <lakshmis@xilinx.com>
> wrote:
> >
> > Hi Rob,
> >
> > Thanks for the review.
> >
> > > -----Original Message-----
> > > From: Rob Herring <robh@kernel.org>
> > > Sent: Tuesday, February 9, 2021 7:51 AM
> > > To: Sai Krishna Potthuri <lakshmis@xilinx.com>
> > > Cc: Linus Walleij <linus.walleij@linaro.org>; Michal Simek
> > > <michals@xilinx.com>; Greg Kroah-Hartman
> > > <gregkh@linuxfoundation.org>; linux-arm-kernel@lists.infradead.org;
> > > linux-kernel@vger.kernel.org; devicetree@vger.kernel.org;
> > > linux-gpio@vger.kernel.org; git <git@xilinx.com>;
> > > saikrishna12468@gmail.com
> > > Subject: Re: [PATCH v2 2/3] dt-bindings: pinctrl: Added binding for
> > > ZynqMP pinctrl driver
> > >
> > > On Tue, Jan 19, 2021 at 10:57:33AM +0530, Sai Krishna Potthuri wrote:
> > > > Added documentation and dt-bindings file which contains MIO pin
> > > > configuration defines for Xilinx ZynqMP pinctrl driver.
> > > >
> > > > Signed-off-by: Sai Krishna Potthuri
> > > > <lakshmi.sai.krishna.potthuri@xilinx.com>
> > > > ---
> > > >  .../bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml | 337
> > > > ++++++++++++++++++  include/dt-bindings/pinctrl/pinctrl-zynqmp.h
> > > > ++++++++++++++++++ |
> > > > 23 ++
> > > >  2 files changed, 360 insertions(+)  create mode 100644
> > > > Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
> > > >  create mode 100644 include/dt-bindings/pinctrl/pinctrl-zynqmp.h
> > > >
> > > > diff --git
> > > > a/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.ya
> > > > ml
> > > > b/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.ya
> > > > ml
> > > > new file mode 100644
> > > > index 000000000000..9f2efbafcaa4
> > > > --- /dev/null
> > > > +++ b/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctr
> > > > +++ l.ya
> > > > +++ ml
> > > > @@ -0,0 +1,337 @@
> > > > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause %YAML 1.2
> > > > +---
> > > > +$id:
> > > > +http://devicetree.org/schemas/pinctrl/xlnx,zynqmp-pinctrl.yaml#
> > > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > > +
> > > > +title: Xilinx ZynqMP Pinctrl
> > > > +
> > > > +maintainers:
> > > > +  - Sai Krishna Potthuri
> > > > +<lakshmi.sai.krishna.potthuri@xilinx.com>
> > > > +  - Rajan Vaja <rajan.vaja@xilinx.com>
> > > > +
> > > > +description: |
> > > > +  Please refer to pinctrl-bindings.txt in this directory for
> > > > +details of the
> > > > +  common pinctrl bindings used by client devices, including the
> > > > +meaning of the
> > > > +  phrase "pin configuration node".
> > > > +
> > > > +  ZynqMP's pin configuration nodes act as a container for an
> > > > + arbitrary number of  subnodes. Each of these subnodes represents
> > > > + some desired configuration for a  pin, a group, or a list of
> > > > + pins or groups. This configuration can include the  mux function
> > > > + to select on those pin(s)/group(s), and various pin
> > > > + configuration  parameters, such
> > > as pull-up, slew rate, etc.
> > > > +
> > > > +  Each configuration node can consist of multiple nodes
> > > > + describing the pinmux and  pinconf options. Those nodes can be
> > > > + pinmux nodes or
> > > pinconf nodes.
> > > > +
> > > > +  The name of each subnode is not important; all subnodes should
> > > > + be enumerated  and processed purely based on their content.
> > > > +
> > > > +properties:
> > > > +  compatible:
> > > > +    const: xlnx,zynqmp-pinctrl
> > > > +
> > > > +patternProperties:
> > > > +  '^(.*-)?(default|gpio)$':
> > > > +    type: object
> > > > +    patternProperties:
> > > > +      '^mux(.*)$':
> > >
> > > '^mux' is equivalent.
> > I will fix in v3.
> >
> > >
> > > > +        type: object
> > > > +        description:
> > > > +          Pinctrl node's client devices use subnodes for pin muxes,
> > > > +          which in turn use below standard properties.
> > > > +        $ref: pinmux-node.yaml#
> > > > +
> > > > +        properties:
> > > > +          groups:
> > > > +            description:
> > > > +              List of groups to select (either this or "pins" must be
> > > > +              specified), available groups for this subnode.
> > > > +            items:
> > > > +              oneOf:
> > > > +                - enum: [ethernet0_0_grp, ethernet1_0_grp,
> > > > + ethernet2_0_grp,
> > >
> > > Don't need 'oneOf' for a single item.
> > Here we have a possibility to have more than one group item as below,
> > hence used 'oneOf'.
> > groups = "uart0_4_grp", "uart0_5_grp"; Please suggest me if there is a
> > better/another way to represent this.
> 
> 'items' has 2 forms: a list with a schema per entry or a schema that applies to
> all entries.
> 
> 1 item:
> items:
>   - enum: [...]
> 
> all items:
> items:
>   enum: [...]
> 
> You should use the latter form. You may need 'maxItems' here. Pick a 'should
> be enough' value if you don't have an actual max.
Thanks.
Sure, I will update accordingly in v3 for groups and pins.

Regards
Sai Krishna
> 
> Rob