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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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feebfe95a6
In current configuration, nau8822 codec on development carrier board provides distorted audio output. This happens due to reference clock is fixed to 25MHz and no PLL is enabled. Following is the calculation of deviation error for different frequencies: 44100Hz: fs = 256 (fixed) prescaler = 2 target frequency = 44100 * 256 * 2 = 22579200 deviation = 22579200 vs 25000000 = 9.6832% 48000Hz: fs = 256 (fixed) prescaler = 2 target frequency = 48000 * 256 * 2 = 24576000 deviation = 24576000 vs 25000000 = 1.696% Enabling nau822 PLL via providing mclk-fs property to simple-audio-card configures clocks properly, but also adjusts audio reference clock (mclk), which in case of TI AM62 should be avoided, as it only supports 25MHz output [1][2]. This change enables PLL on nau8822 by providing mclk-fs, and moves away audio reference clock from DAI configuration, which prevents simple-audio-card to adjust it before every playback [3]. [1]: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1175479/processor-sdk-am62x-output-audio_ext_refclk0-as-mclk-for-codec-and-mcbsp/4444986#4444986 [2]: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1188051/am625-audio_ext_refclk1-clock-output---dts-support/4476322#4476322 [3]: sound/soc/generic/simple-card-utils.c#L441 Signed-off-by: Andrejs Cainikovs <andrejs.cainikovs@toradex.com> Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com> Link: https://lore.kernel.org/r/20240418105730.120913-1-andrejs.cainikovs@gmail.com Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
247 lines
4.1 KiB
Plaintext
247 lines
4.1 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
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/*
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* Copyright 2023 Toradex
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*
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* Common dtsi for Verdin AM62 SoM on Development carrier board
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*
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* https://www.toradex.com/computer-on-modules/verdin-arm-family/ti-am62
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* https://www.toradex.com/products/carrier-board/verdin-development-board-kit
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*/
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/ {
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sound {
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compatible = "simple-audio-card";
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simple-audio-card,bitclock-master = <&codec_dai>;
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simple-audio-card,format = "i2s";
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simple-audio-card,frame-master = <&codec_dai>;
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simple-audio-card,mclk-fs = <256>;
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simple-audio-card,name = "verdin-nau8822";
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simple-audio-card,routing =
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"Headphones", "LHP",
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"Headphones", "RHP",
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"Speaker", "LSPK",
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"Speaker", "RSPK",
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"Line Out", "AUXOUT1",
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"Line Out", "AUXOUT2",
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"LAUX", "Line In",
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"RAUX", "Line In",
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"LMICP", "Mic In",
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"RMICP", "Mic In";
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simple-audio-card,widgets =
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"Headphones", "Headphones",
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"Line Out", "Line Out",
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"Speaker", "Speaker",
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"Microphone", "Mic In",
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"Line", "Line In";
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codec_dai: simple-audio-card,codec {
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sound-dai = <&nau8822_1a>;
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};
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simple-audio-card,cpu {
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sound-dai = <&mcasp0>;
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};
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};
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};
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/* Verdin ETHs */
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&cpsw3g {
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_rgmii1>, <&pinctrl_rgmii2>;
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status = "okay";
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};
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/* MDIO, shared by Verdin ETH_1 (On-module PHY) and Verdin ETH_2_RGMII */
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&cpsw3g_mdio {
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status = "okay";
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cpsw3g_phy1: ethernet-phy@7 {
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compatible = "ethernet-phy-ieee802.3-c22";
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reg = <7>;
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interrupt-parent = <&main_gpio0>;
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interrupts = <38 IRQ_TYPE_EDGE_FALLING>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_eth2_rgmii_int>;
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micrel,led-mode = <0>;
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};
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};
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/* Verdin ETH_1 (On-module PHY) */
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&cpsw_port1 {
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status = "okay";
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};
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/* Verdin ETH_2_RGMII */
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&cpsw_port2 {
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phy-handle = <&cpsw3g_phy1>;
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phy-mode = "rgmii-rxid";
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status = "okay";
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};
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/* Verdin PWM_1, PWM_2 */
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&epwm0 {
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status = "okay";
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};
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/* Verdin PWM_3_DSI */
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&epwm1 {
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status = "okay";
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};
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&main_gpio0 {
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_ctrl_sleep_moci>,
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<&pinctrl_gpio_5>,
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<&pinctrl_gpio_6>,
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<&pinctrl_gpio_7>,
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<&pinctrl_gpio_8>;
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};
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/* Verdin I2C_1 */
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&main_i2c1 {
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status = "okay";
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/* Audio Codec */
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nau8822_1a: audio-codec@1a {
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compatible = "nuvoton,nau8822";
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reg = <0x1a>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_i2s1_mclk>;
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clock-names = "mclk";
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clocks = <&audio_refclk1>;
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#sound-dai-cells = <0>;
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};
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/* IO Expander */
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gpio_expander_21: gpio@21 {
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compatible = "nxp,pcal6416";
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reg = <0x21>;
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#gpio-cells = <2>;
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gpio-controller;
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};
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/* Current measurement into module VCC */
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hwmon@40 {
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compatible = "ti,ina219";
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reg = <0x40>;
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shunt-resistor = <10000>;
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};
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/* Temperature sensor */
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sensor@4f {
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compatible = "ti,tmp75c";
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reg = <0x4f>;
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};
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/* EEPROM */
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eeprom@57 {
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compatible = "st,24c02", "atmel,24c02";
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reg = <0x57>;
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pagesize = <16>;
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};
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};
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/* Verdin I2C_2_DSI */
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&main_i2c2 {
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status = "okay";
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};
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/* Verdin I2C_4_CSI */
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&main_i2c3 {
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status = "okay";
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};
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/* Verdin CAN_1 */
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&main_mcan0 {
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status = "okay";
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};
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/* Verdin SPI_1 */
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&main_spi1 {
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status = "okay";
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};
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/* Verdin UART_3 */
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&main_uart0 {
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status = "okay";
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};
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/* Verdin UART_1, connector X50 through RS485 transceiver. */
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&main_uart1 {
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linux,rs485-enabled-at-boot-time;
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rs485-rx-during-tx;
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status = "okay";
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};
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/* Verdin I2S_1 */
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&mcasp0 {
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status = "okay";
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};
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&mcu_gpio0 {
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_gpio_1>,
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<&pinctrl_gpio_2>,
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<&pinctrl_gpio_3>,
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<&pinctrl_gpio_4>,
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<&pinctrl_pcie_1_reset>;
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};
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/* Verdin I2C_3_HDMI */
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&mcu_i2c0 {
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status = "okay";
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};
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/* Verdin CAN_2 */
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&mcu_mcan0 {
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status = "okay";
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};
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/* Verdin UART_4 */
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&mcu_uart0 {
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status = "okay";
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};
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/* Verdin QSPI_1 */
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&ospi0 {
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status = "okay";
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};
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/* Verdin SD_1 */
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&sdhci1 {
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status = "okay";
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};
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/* Verdin USB_1 */
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&usbss0 {
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status = "okay";
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};
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&usb0 {
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status = "okay";
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};
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/* Verdin USB_2 */
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&usbss1 {
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status = "okay";
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};
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&usb1 {
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status = "okay";
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};
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/* Verdin CTRL_WAKE1_MICO# */
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&verdin_gpio_keys {
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status = "okay";
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};
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/* Verdin PCIE_1_RESET# */
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&verdin_pcie_1_reset_hog {
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status = "okay";
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};
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/* Verdin UART_2 */
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&wkup_uart0 {
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status = "okay";
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};
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