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![Andreas Dannenberg](/assets/img/avatar_default.png)
The AM654 base board has a TCA9554/PCA9554-type GPIO expander on the wkup_i2c0 bus at address 0x38 that is used to detect the presence of daughter cards. Add a respective DTS description of this expander to enable its use. Signed-off-by: Andreas Dannenberg <dannenberg@ti.com> Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
87 lines
2.2 KiB
Plaintext
87 lines
2.2 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2016-2018 Texas Instruments Incorporated - http://www.ti.com/
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*/
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/dts-v1/;
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#include "k3-am654.dtsi"
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#include <dt-bindings/pinctrl/k3.h>
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/ {
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compatible = "ti,am654-evm", "ti,am654";
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model = "Texas Instruments AM654 Base Board";
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chosen {
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stdout-path = "serial2:115200n8";
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bootargs = "earlycon=ns16550a,mmio32,0x02800000";
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};
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memory@80000000 {
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device_type = "memory";
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/* 4G RAM */
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reg = <0x00000000 0x80000000 0x00000000 0x80000000>,
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<0x00000008 0x80000000 0x00000000 0x80000000>;
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};
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reserved-memory {
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#address-cells = <2>;
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#size-cells = <2>;
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ranges;
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secure_ddr: secure_ddr@9e800000 {
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reg = <0 0x9e800000 0 0x01800000>; /* for OP-TEE */
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alignment = <0x1000>;
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no-map;
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};
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};
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};
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&main_pmx0 {
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main_mmc0_pins_default: main_mmc0_pins_default {
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pinctrl-single,pins = <
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AM65X_IOPAD(0x01a8, PIN_INPUT_PULLDOWN, 0) /* (B25) MMC0_CLK */
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AM65X_IOPAD(0x01aC, PIN_INPUT_PULLUP, 0) /* (B27) MMC0_CMD */
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AM65X_IOPAD(0x01a4, PIN_INPUT_PULLUP, 0) /* (A26) MMC0_DAT0 */
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AM65X_IOPAD(0x01a0, PIN_INPUT_PULLUP, 0) /* (E25) MMC0_DAT1 */
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AM65X_IOPAD(0x019c, PIN_INPUT_PULLUP, 0) /* (C26) MMC0_DAT2 */
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AM65X_IOPAD(0x0198, PIN_INPUT_PULLUP, 0) /* (A25) MMC0_DAT3 */
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AM65X_IOPAD(0x0194, PIN_INPUT_PULLUP, 0) /* (E24) MMC0_DAT4 */
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AM65X_IOPAD(0x0190, PIN_INPUT_PULLUP, 0) /* (A24) MMC0_DAT5 */
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AM65X_IOPAD(0x018c, PIN_INPUT_PULLUP, 0) /* (B26) MMC0_DAT6 */
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AM65X_IOPAD(0x0188, PIN_INPUT_PULLUP, 0) /* (D25) MMC0_DAT7 */
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AM65X_IOPAD(0x01b4, PIN_INPUT_PULLUP, 0) /* (A23) MMC0_SDCD */
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AM65X_IOPAD(0x01b0, PIN_INPUT, 0) /* (C25) MMC0_DS */
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>;
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};
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};
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&wkup_pmx0 {
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wkup_i2c0_pins_default: wkup-i2c0-pins-default {
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pinctrl-single,pins = <
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AM65X_WKUP_IOPAD(0x00e0, PIN_INPUT, 0) /* (AC7) WKUP_I2C0_SCL */
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AM65X_WKUP_IOPAD(0x00e4, PIN_INPUT, 0) /* (AD6) WKUP_I2C0_SDA */
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>;
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};
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};
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&sdhci0 {
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pinctrl-names = "default";
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pinctrl-0 = <&main_mmc0_pins_default>;
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bus-width = <8>;
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non-removable;
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ti,driver-strength-ohm = <50>;
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};
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&wkup_i2c0 {
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pinctrl-names = "default";
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pinctrl-0 = <&wkup_i2c0_pins_default>;
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clock-frequency = <400000>;
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tca9554: gpio@38 {
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compatible = "nxp,pca9554";
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reg = <0x38>;
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gpio-controller;
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#gpio-cells = <2>;
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};
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};
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