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Date: Tue, 29 Aug 2023 07:22:30 +0000
From: TY_Chang[張子逸] <tychang@...ltek.com>
To: Rob Herring <robh@...nel.org>
CC: Linus Walleij <linus.walleij@...aro.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2 5/7] dt-bindings: pinctrl: realtek: add RTD1315E pinctrl binding
Hi Rob,
>On Thu, Aug 24, 2023 at 06:57:01PM +0800, Tzuyi Chang wrote:
>> Add device tree bindings for RTD1315E.
>>
>> Signed-off-by: Tzuyi Chang <tychang@...ltek.com>
>> ---
>> v1 to v2 change:
>> 1. Add a description for RTD1315E.
>> 2. Rename realtek,pdrive, realtekmndrive and realtek,dcycle.
>> 3. Add a description for PMOS and NMOS driving strength.
>> 4. Remove the wildcard in the compatible strings.
>> 5. Use '-pins$' to be node name pattern.
>> ---
>> .../pinctrl/realtek,rtd1315e-pinctrl.yaml | 191 ++++++++++++++++++
>> 1 file changed, 191 insertions(+)
>> create mode 100644
>> Documentation/devicetree/bindings/pinctrl/realtek,rtd1315e-pinctrl.yam
>> l
>>
>> diff --git
>> a/Documentation/devicetree/bindings/pinctrl/realtek,rtd1315e-pinctrl.y
>> aml
>> b/Documentation/devicetree/bindings/pinctrl/realtek,rtd1315e-pinctrl.y
>> aml
>> new file mode 100644
>> index 000000000000..babd87d05f32
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/pinctrl/realtek,rtd1315e-pinct
>> +++ rl.yaml
>> @@ -0,0 +1,191 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) # Copyright 2023
>> +Realtek Semiconductor Corporation %YAML 1.2
>> +---
>> +$id:
>> +http://devicetree.org/schemas/pinctrl/realtek,rtd1315e-pinctrl.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Realtek DHC RTD1315E Pin Controller
>> +
>> +maintainers:
>> + - TY Chang <tychang@...ltek.com>
>> +
>> +description:
>> + The Realtek DHC RTD1315E is a high-definition media processor SoC.
>> +The
>> + RTD1315E pin controller is used to control pin function, pull
>> +up/down
>> + resistor, drive strength, schmitt trigger and power source.
>> +
>> +properties:
>> + compatible:
>> + const: realtek,rtd1315e-pinctrl
>> +
>> + reg:
>> + maxItems: 1
>> +
>> +patternProperties:
>> + '-pins$':
>> + if:
>> + type: object
>> + then:
>
>Drop the if/then. "-pins" should always be a node (object).
I will fix it in the next version.
>
>> + allOf:
>> + - $ref: pincfg-node.yaml#
>> + - $ref: pinmux-node.yaml#
>> +
>> + properties:
>> + pins:
>> + items:
>> + enum: [ gpio_0, gpio_1, emmc_rst_n, emmc_dd_sb, emmc_clk,
>emmc_cmd,
>> + gpio_6, gpio_7, gpio_8, gpio_9, gpio_10, gpio_11,
>gpio_12,
>> + gpio_13, gpio_14, gpio_15, gpio_16, gpio_17, gpio_18,
>gpio_19,
>> + gpio_20, emmc_data_0, emmc_data_1, emmc_data_2,
>usb_cc2, gpio_25,
>> + gpio_26, gpio_27, gpio_28, gpio_29, gpio_30, gpio_31,
>gpio_32,
>> + gpio_33, gpio_34, gpio_35, hif_data, hif_en, hif_rdy,
>hif_clk,
>> + gpio_dummy_40, gpio_dummy_41, gpio_dummy_42,
>gpio_dummy_43,
>> + gpio_dummy_44, gpio_dummy_45, gpio_46, gpio_47,
>gpio_48, gpio_49,
>> + gpio_50, usb_cc1, emmc_data_3, emmc_data_4, ir_rx,
>ur0_rx, ur0_tx,
>> + gpio_57, gpio_58, gpio_59, gpio_60, gpio_61, gpio_62,
>gpio_dummy_63,
>> + gpio_dummy_64, gpio_dummy_65, gpio_66, gpio_67,
>gpio_68, gpio_69,
>> + gpio_70, gpio_71, gpio_72, gpio_dummy_73,
>emmc_data_5, emmc_data_6,
>> + emmc_data_7, gpio_dummy_77, gpio_78, gpio_79,
>gpio_80, gpio_81,
>> + ur2_loc, gspi_loc, hi_width, sf_en, arm_trace_dbg_en,
>> + ejtag_aucpu_loc, ejtag_acpu_loc, ejtag_vcpu_loc,
>ejtag_scpu_loc,
>> + dmic_loc, vtc_dmic_loc, vtc_tdm_loc, vtc_i2si_loc,
>tdm_ai_loc,
>> + ai_loc, spdif_loc, hif_en_loc, scan_switch, wd_rset,
>boot_sel,
>> + reset_n, testmode ]
>> +
>> + function:
>> + enum: [ gpio, nf, emmc, ao, gspi_loc0, gspi_loc1, uart0, uart1,
>> + uart2_loc0, uart2_loc1, i2c0, i2c1, i2c4, i2c5, pcie1,
>> + etn_led, etn_phy, spi, pwm0_loc0, pwm0_loc1,
>pwm1_loc0,
>> + pwm1_loc1, pwm2_loc0, pwm2_loc1, pwm3_loc0,
>pwm3_loc1,
>> + spdif_optical_loc0, spdif_optical_loc1, usb_cc1, usb_cc2,
>> + sd, dmic_loc0, dmic_loc1, ai_loc0, ai_loc1, tdm_ai_loc0,
>> + tdm_ai_loc1, hi_loc0, hi_m, vtc_i2so, vtc_i2si_loc0,
>> + vtc_i2si_loc1, vtc_dmic_loc0, vtc_dmic_loc1,
>vtc_tdm_loc0,
>> + vtc_tdm_loc1, dc_fan, pll_test_loc0, pll_test_loc1,
>> + ir_rx, uart2_disable, gspi_disable, hi_width_disable,
>> + hi_width_1bit, sf_disable, sf_enable, scpu_ejtag_loc0,
>> + scpu_ejtag_loc1, scpu_ejtag_loc2, scpu_ejtag_loc3,
>> + acpu_ejtag_loc0, acpu_ejtag_loc1, acpu_ejtag_loc2,
>> + vcpu_ejtag_loc0, vcpu_ejtag_loc1, vcpu_ejtag_loc2,
>> + aucpu_ejtag_loc0, aucpu_ejtag_loc1, aucpu_ejtag_loc2,
>> + gpu_ejtag, iso_tristate, dbg_out0, dbg_out1,
>standby_dbg,
>> + spdif, arm_trace_debug_disable,
>arm_trace_debug_enable,
>> + aucpu_ejtag_disable, acpu_ejtag_disable,
>vcpu_ejtag_disable,
>> + scpu_ejtag_disable, vtc_dmic_loc_disable,
>vtc_tdm_disable,
>> + vtc_i2si_disable, tdm_ai_disable, ai_disable, spdif_disable,
>> + hif_disable, hif_enable, test_loop, pmic_pwrup ]
>> +
>> +
>> + drive-strength:
>> + enum: [4, 8]
>> +
>> + bias-pull-down: true
>> +
>> + bias-pull-up: true
>> +
>> + bias-disable: true
>> +
>> + input-schmitt-enable: true
>> +
>> + input-schmitt-disable: true
>> +
>> + drive-push-pull: true
>> +
>> + power-source:
>> + description: |
>> + Valid arguments are described as below:
>> + 0: power supply of 1.8V
>> + 1: power supply of 3.3V
>> + enum: [0, 1]
>> +
>> + realtek,drive-strength-p:
>> + description: |
>> + Some of pins can be driven using the P-MOS and N-MOS
>transistor to
>> + achieve finer adjustments. The block-diagram representation is
>as
>> + follows:
>> + VDD
>> + |
>> + ||--+
>> + +-----o|| P-MOS-FET
>> + | ||--+
>> + IN --+ +----- out
>> + | ||--+
>> + +------|| N-MOS-FET
>> + ||--+
>> + |
>> + GND
>> + The driving strength of the P-MOS/N-MOS transistors impacts the
>> + waveform's rise/fall times. Greater driving strength results in
>> + shorter rise/fall times. Each P-MOS and N-MOS transistor offers
>> + 8 configurable levels (0 to 7), with higher values indicating
>> + greater driving strength, contributing to achieving the desired
>> + speed.
>> +
>> + The realtek,drive-strength-p is used to control the driving
>strength
>> + of the P-MOS output.
>> + $ref: /schemas/types.yaml#/definitions/uint32
>> + minimum: 0
>> + maximum: 7
>> +
>> + realtek,drive-strength-n:
>> + description: |
>> + Similar to the realtek,drive-strength-p, the
>realtek,drive-strength-n
>> + is used to control the driving strength of the N-MOS output.
>> + $ref: /schemas/types.yaml#/definitions/uint32
>> + minimum: 0
>> + maximum: 7
>> +
>> + realtek,duty-cycle:
>> + description: |
>> + An integer describing the level to adjust output duty cycle,
>controlling
>> + the proportion of positive and negative waveforms in
>nanoseconds.
>> + Valid arguments are described as below:
>> + 0: 0ns
>> + 2: + 0.25ns
>> + 3: + 0.5ns
>> + 4: -0.25ns
>> + 5: -0.5ns
>> + $ref: /schemas/types.yaml#/definitions/uint32
>> + enum: [ 0, 2, 3, 4, 5 ]
>> +
>> + required:
>> + - pins
>> +
>> + additionalProperties: false
>> +
>> +required:
>> + - compatible
>> + - reg
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> + - |
>> + pinctrl@...00 {
>> + compatible = "realtek,rtd1315e-pinctrl";
>> + reg = <0x4e000 0x130>;
>> +
>> + emmc-hs200-pins {
>> + pins = "emmc_clk",
>> + "emmc_cmd",
>> + "emmc_data_0",
>> + "emmc_data_1",
>> + "emmc_data_2",
>> + "emmc_data_3",
>> + "emmc_data_4",
>> + "emmc_data_5",
>> + "emmc_data_6",
>> + "emmc_data_7";
>> + function = "emmc";
>> + realtek,drive-strength-p = <0x2>;
>> + realtek,drive-strength-n = <0x2>;
>> + };
>> +
>> + i2c-0-pins {
>> + pins = "gpio_12",
>> + "gpio_13";
>> + function = "i2c0";
>> + drive-strength = <4>;
>> + };
>> + };
>> --
>> 2.41.0
>>
Thanks,
Tzuyi Chang
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