# 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# $schema: http://devicetree.org/meta-schemas/core.yaml# title: Realtek DHC RTD1315E Pin Controller maintainers: - TY Chang description: The Realtek DHC RTD1315E is a high-definition media processor SoC. The RTD1315E pin controller is used to control pin function, pull up/down resistor, drive strength, schmitt trigger and power source. properties: compatible: const: realtek,rtd1315e-pinctrl reg: maxItems: 1 patternProperties: '-pins$': type: object 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@4e000 { 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>; }; };