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Date:   Wed, 15 Jul 2020 14:03:09 -0600
From:   Rob Herring <robh@kernel.org>
To:     Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
Cc:     Andreas =?iso-8859-1?Q?F=E4rber?= <afaerber@suse.de>,
        Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
        Linus Walleij <linus.walleij@linaro.org>,
        linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-actions@lists.infradead.org
Subject: Re: [PATCH 1/3] dt-bindings: pinctrl: Add bindings for Actions S500
 SoC
Message-ID: <20200715200309.GA722435@bogus>
References: <cover.1593112402.git.cristian.ciocaltea@gmail.com>
 <2a7610ff9f33cf72d9df6fc4598741fb6d7836e0.1593112402.git.cristian.ciocaltea@gmail.com>
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On Thu, Jun 25, 2020 at 11:16:18PM +0300, Cristian Ciocaltea wrote:
> Add pinctrl and gpio bindings for Actions Semi S500 SoC.
> 
> Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
> ---
>  .../pinctrl/actions,s500-pinctrl.yaml         | 228 ++++++++++++++++++
>  1 file changed, 228 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pinctrl/actions,s500-pinctrl.yaml
> 
> diff --git a/Documentation/devicetree/bindings/pinctrl/actions,s500-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/actions,s500-pinctrl.yaml
> new file mode 100644
> index 000000000000..856947c70844
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pinctrl/actions,s500-pinctrl.yaml
> @@ -0,0 +1,228 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pinctrl/actions,s500-pinctrl.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Actions Semi S500 SoC pinmux & GPIO controller
> +
> +maintainers:
> +  - Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> +
> +description: |
> +  Pinmux & GPIO controller manages pin multiplexing & configuration including
> +  GPIO function selection & GPIO attributes configuration. Please refer to
> +  pinctrl-bindings.txt in this directory for common binding part and usage.
> +
> +properties:
> +  compatible:
> +    const: actions,s500-pinctrl
> +
> +  reg:
> +    minItems: 1
> +    maxItems: 4

Need to enumerate what each register range is.

> +
> +  clocks:
> +    maxItems: 1
> +
> +  gpio-controller: true
> +
> +  gpio-ranges:
> +    maxItems: 1
> +
> +  '#gpio-cells':
> +    description:
> +      Specifies the pin number and flags, as defined in
> +      include/dt-bindings/gpio/gpio.h
> +    const: 2
> +
> +  interrupt-controller: true
> +
> +  '#interrupt-cells':
> +    description:
> +      Specifies the pin number and flags, as defined in
> +      include/dt-bindings/interrupt-controller/irq.h
> +    const: 2
> +
> +  interrupts:
> +    description:
> +      One interrupt per each of the 5 GPIO ports supported by the controller,
> +      sorted by port number ascending order.
> +    minItems: 5
> +    maxItems: 5
> +
> +patternProperties:
> +  '^.*$':
> +    if:
> +      type: object

For a new binding, can you do '-pins$' for the node names so we don't 
need this if/then hack.

> +    then:
> +      patternProperties:
> +        'pinmux$':

Is this really a pattern? Can't tell from the example.

> +          type: object
> +          description:
> +            Pinctrl node's client devices specify pin muxes using subnodes,
> +            which in turn use the standard properties below.
> +          $ref: pinmux-node.yaml#
> +
> +          properties:
> +            groups:
> +              description:
> +                List of gpio pin groups affected by the functions specified in
> +                this subnode.
> +              items:
> +                oneOf:
> +                  - enum: [lcd0_d18_mfp, rmii_crs_dv_mfp, rmii_txd0_mfp,
> +                      rmii_txd1_mfp, rmii_txen_mfp, rmii_rxen_mfp,
> +                      rmii_rxd1_mfp, rmii_rxd0_mfp, rmii_ref_clk_mfp,
> +                      i2s_d0_mfp, i2s_pcm1_mfp, i2s0_pcm0_mfp, i2s1_pcm0_mfp,
> +                      i2s_d1_mfp, ks_in2_mfp, ks_in1_mfp, ks_in0_mfp,
> +                      ks_in3_mfp, ks_out0_mfp, ks_out1_mfp, ks_out2_mfp,
> +                      lvds_o_pn_mfp, dsi_dn0_mfp, dsi_dp2_mfp, lcd0_d17_mfp,
> +                      dsi_dp3_mfp, dsi_dn3_mfp, dsi_dp0_mfp, lvds_ee_pn_mfp,
> +                      spi0_i2c_pcm_mfp, spi0_i2s_pcm_mfp, dsi_dnp1_cp_mfp,
> +                      lvds_e_pn_mfp, dsi_dn2_mfp, uart2_rtsb_mfp,
> +                      uart2_ctsb_mfp, uart3_rtsb_mfp, uart3_ctsb_mfp,
> +                      sd0_d0_mfp, sd0_d1_mfp, sd0_d2_d3_mfp, sd1_d0_d3_mfp,
> +                      sd0_cmd_mfp, sd0_clk_mfp, sd1_cmd_mfp, uart0_rx_mfp,
> +                      clko_25m_mfp, csi_cn_cp_mfp, sens0_ckout_mfp,
> +                      uart0_tx_mfp, i2c0_mfp, csi_dn_dp_mfp, sen0_pclk_mfp,
> +                      pcm1_in_mfp, pcm1_clk_mfp, pcm1_sync_mfp, pcm1_out_mfp,
> +                      dnand_data_wr_mfp, dnand_acle_ce0_mfp, nand_ceb2_mfp,
> +                      nand_ceb3_mfp]
> +              minItems: 1
> +              maxItems: 32
> +
> +            function:
> +              description:
> +                Specify the alternative function to be configured for the
> +                given gpio pin groups.
> +              enum: [nor, eth_rmii, eth_smii, spi0, spi1, spi2, spi3, sens0,
> +                sens1, uart0, uart1, uart2, uart3, uart4, uart5, uart6, i2s0,
> +                i2s1, pcm1, pcm0, ks, jtag, pwm0, pwm1, pwm2, pwm3, pwm4, pwm5,
> +                p0, sd0, sd1, sd2, i2c0, i2c1, i2c3, dsi, lvds, usb30, clko_25m,
> +                mipi_csi, nand, spdif, ts, lcd0]
> +
> +          required:
> +            - groups
> +            - function
> +
> +          additionalProperties: false
> +
> +        'pinconf$':
> +          type: object
> +          description:
> +            Pinctrl node's client devices specify pin configurations using
> +            subnodes, which in turn use the standard properties below.
> +          $ref: pincfg-node.yaml#
> +
> +          properties:
> +            groups:
> +              description:
> +                List of gpio pin groups affected by the drive-strength property
> +                specified in this subnode.
> +              items:
> +                oneOf:
> +                  - enum: [sirq_drv, rmii_txd01_txen_drv, rmii_rxer_drv,
> +                      rmii_crs_drv, rmii_rxd10_drv, rmii_ref_clk_drv,
> +                      smi_mdc_mdio_drv, i2s_d0_drv, i2s_bclk0_drv, i2s3_drv,
> +                      i2s13_drv, pcm1_drv, ks_in_drv, ks_out_drv, lvds_all_drv,
> +                      lcd_dsi_drv, dsi_drv, sd0_d0_d3_drv, sd1_d0_d3_drv,
> +                      sd0_cmd_drv, sd0_clk_drv, sd1_cmd_drv, sd1_clk_drv,
> +                      spi0_all_drv, uart0_rx_drv, uart0_tx_drv, uart2_all_drv,
> +                      i2c0_all_drv, i2c12_all_drv, sens0_pclk_drv,
> +                      sens0_ckout_drv, uart3_all_drv]
> +              minItems: 1
> +              maxItems: 32
> +
> +            pins:
> +              description:
> +                List of gpio pins affected by the bias-pull-* and
> +                input-schmitt-* properties specified in this subnode.
> +              items:
> +                oneOf:
> +                  - enum: [dnand_dqs, dnand_dqsn, eth_txd0, eth_txd1, eth_txen,
> +                      eth_rxer, eth_crs_dv, eth_rxd1, eth_rxd0, eth_ref_clk,
> +                      eth_mdc, eth_mdio, sirq0, sirq1, sirq2, i2s_d0, i2s_bclk0,
> +                      i2s_lrclk0, i2s_mclk0, i2s_d1, i2s_bclk1, i2s_lrclk1,
> +                      i2s_mclk1, ks_in0, ks_in1, ks_in2, ks_in3, ks_out0,
> +                      ks_out1, ks_out2, lvds_oep, lvds_oen, lvds_odp, lvds_odn,
> +                      lvds_ocp, lvds_ocn, lvds_obp, lvds_obn, lvds_oap,
> +                      lvds_oan, lvds_eep, lvds_een, lvds_edp, lvds_edn,
> +                      lvds_ecp, lvds_ecn, lvds_ebp, lvds_ebn, lvds_eap,
> +                      lvds_ean, lcd0_d18, lcd0_d17, dsi_dp3, dsi_dn3, dsi_dp1,
> +                      dsi_dn1, dsi_cp, dsi_cn, dsi_dp0, dsi_dn0, dsi_dp2,
> +                      dsi_dn2, sd0_d0, sd0_d1, sd0_d2, sd0_d3, sd1_d0, sd1_d1,
> +                      sd1_d2, sd1_d3, sd0_cmd, sd0_clk, sd1_cmd, sd1_clk,
> +                      spi0_sclk, spi0_ss, spi0_miso, spi0_mosi, uart0_rx,
> +                      uart0_tx, i2c0_sclk, i2c0_sdata, sensor0_pclk,
> +                      sensor0_ckout, dnand_ale, dnand_cle, dnand_ceb0,
> +                      dnand_ceb1, dnand_ceb2, dnand_ceb3, uart2_rx, uart2_tx,
> +                      uart2_rtsb, uart2_ctsb, uart3_rx, uart3_tx, uart3_rtsb,
> +                      uart3_ctsb, pcm1_in, pcm1_clk, pcm1_sync, pcm1_out,
> +                      i2c1_sclk, i2c1_sdata, i2c2_sclk, i2c2_sdata, csi_dn0,
> +                      csi_dp0, csi_dn1, csi_dp1, csi_dn2, csi_dp2, csi_dn3,
> +                      csi_dp3, csi_cn, csi_cp, dnand_d0, dnand_d1, dnand_d2,
> +                      dnand_d3, dnand_d4, dnand_d5, dnand_d6, dnand_d7,
> +                      dnand_rb, dnand_rdb, dnand_rdbn, dnand_wrb, porb,
> +                      clko_25m, bsel, pkg0, pkg1, pkg2, pkg3]
> +              minItems: 1
> +              maxItems: 64
> +
> +            bias-pull-up: true
> +            bias-pull-down: true
> +
> +            drive-strength:
> +              description:
> +                Selects the drive strength for the specified pins, in mA.
> +              enum: [2, 4, 8, 12]
> +
> +            input-schmitt-enable: true
> +            input-schmitt-disable: true
> +
> +          additionalProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - gpio-controller
> +  - gpio-ranges
> +  - '#gpio-cells'
> +  - interrupt-controller
> +  - '#interrupt-cells'
> +  - interrupts
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    pinctrl: pinctrl@b01b0000 {
> +        compatible = "actions,s500-pinctrl";
> +        reg = <0xe01b0000 0x1000>;
> +        clocks = <&cmu 20>;
> +        gpio-controller;
> +        gpio-ranges = <&pinctrl 0 0 132>;
> +        #gpio-cells = <2>;
> +        interrupt-controller;
> +        #interrupt-cells = <2>;
> +        interrupts = <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>,
> +                     <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>,
> +                     <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>,
> +                     <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>,
> +                     <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
> +
> +        i2c0_default: i2c0_default {
> +            pinmux {
> +                groups = "i2c0_mfp";
> +                function = "i2c0";
> +            };
> +
> +            pinconf {
> +                pins = "i2c0_sclk", "i2c0_sdata";
> +                bias-pull-up;
> +            };
> +        };
> +    };
> +
> +...
> -- 
> 2.27.0
>