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