Date:   Fri, 14 Oct 2022 11:02:37 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v2 3/3] dt-bindings: pinctrl: qcom,sc7180: convert to dtschema

Hi,

On Thu, Oct 13, 2022 at 11:49 AM Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
>
> diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,sc7180-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/qcom,sc7180-pinctrl.yaml
> new file mode 100644
> index 000000000000..464f1031d15d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pinctrl/qcom,sc7180-pinctrl.yaml

[ ... cut ... ]

> @@ -0,0 +1,162 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pinctrl/qcom,sc7180-pinctrl.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm SC7180 TLMM pin controller
> +
> +maintainers:
> +  - Bjorn Andersson <andersson@...nel.org>
> +  - Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> +
> +description:
> +  Top Level Mode Multiplexer pin controller in Qualcomm SC7180 SoC.
> +
> +properties:
> +  compatible:
> +    const: qcom,sc7180-pinctrl
> +
> +  reg:
> +    maxItems: 3
> +
> +  reg-names:
> +    items:
> +      - const: west
> +      - const: north
> +      - const: south
> +
> +  interrupts: true
> +  interrupt-controller: true
> +  "#interrupt-cells": true
> +  gpio-controller: true
> +  "#gpio-cells": true
> +  gpio-ranges: true
> +  wakeup-parent: true

Do you need interrupts/interrupt-controller/.../... ? Below you
include allOf "/schemas/pinctrl/qcom,tlmm-common.yaml". Won't you
magically get those from there? Why do you need to duplicate this?


> +  gpio-reserved-ranges:
> +    minItems: 1
> +    maxItems: 60
> +
> +  gpio-line-names:
> +    maxItems: 119
> +
> +patternProperties:
> +  "-state$":
> +    oneOf:
> +      - $ref: "#/$defs/qcom-sc7180-tlmm-state"
> +      - patternProperties:
> +          "-pins$":
> +            $ref: "#/$defs/qcom-sc7180-tlmm-state"
> +        additionalProperties: false
> +
> +$defs:
> +  qcom-sc7180-tlmm-state:
> +    type: object
> +    description:
> +      Pinctrl node's client devices use subnodes for desired pin configuration.
> +      Client device subnodes use below standard properties.
> +    $ref: qcom,tlmm-common.yaml#/$defs/qcom-tlmm-state
> +
> +    properties:
> +      pins:
> +        description:
> +          List of gpio pins affected by the properties specified in this
> +          subnode.
> +        items:
> +          oneOf:
> +            - pattern: "^gpio([0-9]|[1-9][0-9]|10[0-9]|11[0-8])$"
> +            - enum: [ sdc1_rclk, sdc1_clk, sdc1_cmd, sdc1_data, sdc2_clk,
> +                      sdc2_cmd, sdc2_data, ufs_reset ]
> +        minItems: 1
> +        maxItems: 36
> +
> +      function:
> +        description:
> +          Specify the alternative function to be configured for the specified
> +          pins.
> +
> +        enum: [ adsp_ext, agera_pll, aoss_cti, atest_char, atest_char0,
> +                atest_char1, atest_char2, atest_char3, atest_tsens,
> +                atest_tsens2, atest_usb1, atest_usb10, atest_usb11,
> +                atest_usb12, atest_usb13, atest_usb2, atest_usb20, atest_usb21,
> +                atest_usb22, atest_usb23, audio_ref, btfm_slimbus, cam_mclk,
> +                cci_async, cci_i2c, cci_timer0, cci_timer1, cci_timer2,
> +                cci_timer3, cci_timer4, cri_trng, dbg_out, ddr_bist, ddr_pxi0,
> +                ddr_pxi1, ddr_pxi2, ddr_pxi3, dp_hot, edp_lcd, gcc_gp1,
> +                gcc_gp2, gcc_gp3, gpio, gp_pdm0, gp_pdm1, gp_pdm2, gps_tx,
> +                jitter_bist, ldo_en, ldo_update, lpass_ext, mdp_vsync,
> +                mdp_vsync0, mdp_vsync1, mdp_vsync2, mdp_vsync3, mi2s_0, mi2s_1,
> +                mi2s_2, mss_lte, m_voc, pa_indicator, phase_flag, PLL_BIST,
> +                pll_bypassnl, pll_reset, prng_rosc, qdss, qdss_cti,
> +                qlink_enable, qlink_request, qspi_clk, qspi_cs, qspi_data,
> +                qup00, qup01, qup02_i2c, qup02_uart, qup03, qup04_i2c,
> +                qup04_uart, qup05, qup10, qup11_i2c, qup11_uart, qup12,
> +                qup13_i2c, qup13_uart, qup14, qup15, sdc1_tb, sdc2_tb,
> +                sd_write, sp_cmu, tgu_ch0, tgu_ch1, tgu_ch2, tgu_ch3,
> +                tsense_pwm1, tsense_pwm2, uim1, uim2, uim_batt, usb_phy, vfr_1,
> +                _V_GPIO, _V_PPS_IN, _V_PPS_OUT, vsense_trigger, wlan1_adc0,
> +                wlan1_adc1, wlan2_adc0, wlan2_adc1 ]
> +
> +      drive-strength:
> +        enum: [2, 4, 6, 8, 10, 12, 14, 16]
> +        description:
> +          Selects the drive strength for the specified pins, in mA.

Again, why do you need to duplicate. The yaml is weak in me, but I
think you're effectively subclassing
"qcom,tlmm-common.yaml#/$defs/qcom-tlmm-state", right? It has the
exact same definition of drive-strength. Why duplicate it?


> +      bias-pull-down: true
> +      bias-pull-up: true
> +      bias-disable: true
> +      input-enable: true
> +      output-high: true
> +      output-low: true

Again, maybe the above properties aren't needed? Don't you inherit
them from tlmm-common?

-Doug

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