Enable all I2C buses and UARTs on BeagleBone Black
This was a bit tricky. At first, I wanted to use one single DTB for both
barebox and the Linux kernel, but unfortunately, barebox gets stuck once
I enable uart4 or uart5. That's a bit bummer, so I went back to using
separate device trees for the bootloader and for the Linux kernel.
What remains unsolved is getting all the BBB-specific stuff (or rather
"Black-specific stuff") used without copying them. In the meanwhile,
let's just start on that file, and add our fixes to the bottom of that.
The actual DT fragments were taken from the cape files which are quite
widely available on the web (and marked as (C) CircuitCo). I adopted
them to use vanilla's conventions of pin definitions.
Change-Id: Ie3dc16b527ea55f150d3cbddfa659578f5e2f9e8
diff --git a/board/czechlight/beaglebone/czechlight-bbb.dts b/board/czechlight/beaglebone/czechlight-bbb.dts
new file mode 100644
index 0000000..be7ae10
--- /dev/null
+++ b/board/czechlight/beaglebone/czechlight-bbb.dts
@@ -0,0 +1,245 @@
+/*
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+/dts-v1/;
+
+#include "am33xx.dtsi"
+#include "am335x-bone-common.dtsi"
+#include <dt-bindings/display/tda998x.h>
+
+/ {
+ model = "TI AM335x BeagleBone Black (CzechLight)";
+ compatible = "ti,am335x-bone-black", "ti,am335x-bone", "ti,am33xx";
+};
+
+&ldo3_reg {
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+};
+
+&mmc1 {
+ vmmc-supply = <&vmmcsd_fixed>;
+};
+
+&mmc2 {
+ vmmc-supply = <&vmmcsd_fixed>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&emmc_pins>;
+ bus-width = <8>;
+ status = "okay";
+};
+
+&am33xx_pinmux {
+ nxp_hdmi_bonelt_pins: nxp_hdmi_bonelt_pins {
+ pinctrl-single,pins = <
+ AM33XX_IOPAD(0x9b0, PIN_OUTPUT_PULLDOWN | MUX_MODE3) /* xdma_event_intr0 */
+ AM33XX_IOPAD(0x8a0, PIN_OUTPUT | MUX_MODE0) /* lcd_data0.lcd_data0 */
+ AM33XX_IOPAD(0x8a4, PIN_OUTPUT | MUX_MODE0) /* lcd_data1.lcd_data1 */
+ AM33XX_IOPAD(0x8a8, PIN_OUTPUT | MUX_MODE0) /* lcd_data2.lcd_data2 */
+ AM33XX_IOPAD(0x8ac, PIN_OUTPUT | MUX_MODE0) /* lcd_data3.lcd_data3 */
+ AM33XX_IOPAD(0x8b0, PIN_OUTPUT | MUX_MODE0) /* lcd_data4.lcd_data4 */
+ AM33XX_IOPAD(0x8b4, PIN_OUTPUT | MUX_MODE0) /* lcd_data5.lcd_data5 */
+ AM33XX_IOPAD(0x8b8, PIN_OUTPUT | MUX_MODE0) /* lcd_data6.lcd_data6 */
+ AM33XX_IOPAD(0x8bc, PIN_OUTPUT | MUX_MODE0) /* lcd_data7.lcd_data7 */
+ AM33XX_IOPAD(0x8c0, PIN_OUTPUT | MUX_MODE0) /* lcd_data8.lcd_data8 */
+ AM33XX_IOPAD(0x8c4, PIN_OUTPUT | MUX_MODE0) /* lcd_data9.lcd_data9 */
+ AM33XX_IOPAD(0x8c8, PIN_OUTPUT | MUX_MODE0) /* lcd_data10.lcd_data10 */
+ AM33XX_IOPAD(0x8cc, PIN_OUTPUT | MUX_MODE0) /* lcd_data11.lcd_data11 */
+ AM33XX_IOPAD(0x8d0, PIN_OUTPUT | MUX_MODE0) /* lcd_data12.lcd_data12 */
+ AM33XX_IOPAD(0x8d4, PIN_OUTPUT | MUX_MODE0) /* lcd_data13.lcd_data13 */
+ AM33XX_IOPAD(0x8d8, PIN_OUTPUT | MUX_MODE0) /* lcd_data14.lcd_data14 */
+ AM33XX_IOPAD(0x8dc, PIN_OUTPUT | MUX_MODE0) /* lcd_data15.lcd_data15 */
+ AM33XX_IOPAD(0x8e0, PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* lcd_vsync.lcd_vsync */
+ AM33XX_IOPAD(0x8e4, PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* lcd_hsync.lcd_hsync */
+ AM33XX_IOPAD(0x8e8, PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* lcd_pclk.lcd_pclk */
+ AM33XX_IOPAD(0x8ec, PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* lcd_ac_bias_en.lcd_ac_bias_en */
+ >;
+ };
+ nxp_hdmi_bonelt_off_pins: nxp_hdmi_bonelt_off_pins {
+ pinctrl-single,pins = <
+ AM33XX_IOPAD(0x9b0, PIN_OUTPUT_PULLDOWN | MUX_MODE3) /* xdma_event_intr0 */
+ >;
+ };
+
+ mcasp0_pins: mcasp0_pins {
+ pinctrl-single,pins = <
+ AM33XX_IOPAD(0x9ac, PIN_INPUT_PULLUP | MUX_MODE0) /* mcasp0_ahcklx.mcasp0_ahclkx */
+ AM33XX_IOPAD(0x99c, PIN_OUTPUT_PULLDOWN | MUX_MODE2) /* mcasp0_ahclkr.mcasp0_axr2*/
+ AM33XX_IOPAD(0x994, PIN_OUTPUT_PULLUP | MUX_MODE0) /* mcasp0_fsx.mcasp0_fsx */
+ AM33XX_IOPAD(0x990, PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* mcasp0_aclkx.mcasp0_aclkx */
+ AM33XX_IOPAD(0x86c, PIN_OUTPUT_PULLDOWN | MUX_MODE7) /* gpmc_a11.GPIO1_27 */
+ >;
+ };
+};
+
+&lcdc {
+ status = "okay";
+ port {
+ lcdc_0: endpoint@0 {
+ remote-endpoint = <&hdmi_0>;
+ };
+ };
+};
+
+&i2c0 {
+ tda19988: tda19988 {
+ compatible = "nxp,tda998x";
+ reg = <0x70>;
+
+ pinctrl-names = "default", "off";
+ pinctrl-0 = <&nxp_hdmi_bonelt_pins>;
+ pinctrl-1 = <&nxp_hdmi_bonelt_off_pins>;
+
+ #sound-dai-cells = <0>;
+ audio-ports = < TDA998x_I2S 0x03>;
+
+ ports {
+ port@0 {
+ hdmi_0: endpoint@0 {
+ remote-endpoint = <&lcdc_0>;
+ };
+ };
+ };
+ };
+};
+
+&rtc {
+ system-power-controller;
+};
+
+&mcasp0 {
+ #sound-dai-cells = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&mcasp0_pins>;
+ status = "okay";
+ op-mode = <0>; /* MCASP_IIS_MODE */
+ tdm-slots = <2>;
+ serial-dir = < /* 0: INACTIVE, 1: TX, 2: RX */
+ 0 0 1 0
+ >;
+ tx-num-evt = <32>;
+ rx-num-evt = <32>;
+};
+
+/ {
+ clk_mcasp0_fixed: clk_mcasp0_fixed {
+ #clock-cells = <0>;
+ compatible = "fixed-clock";
+ clock-frequency = <24576000>;
+ };
+
+ clk_mcasp0: clk_mcasp0 {
+ #clock-cells = <0>;
+ compatible = "gpio-gate-clock";
+ clocks = <&clk_mcasp0_fixed>;
+ enable-gpios = <&gpio1 27 0>; /* BeagleBone Black Clk enable on GPIO1_27 */
+ };
+
+ sound {
+ compatible = "simple-audio-card";
+ simple-audio-card,name = "TI BeagleBone Black";
+ simple-audio-card,format = "i2s";
+ simple-audio-card,bitclock-master = <&dailink0_master>;
+ simple-audio-card,frame-master = <&dailink0_master>;
+
+ dailink0_master: simple-audio-card,cpu {
+ sound-dai = <&mcasp0>;
+ clocks = <&clk_mcasp0>;
+ };
+
+ simple-audio-card,codec {
+ sound-dai = <&tda19988>;
+ };
+ };
+};
+
+/* These modifications were Written by Jan Kundrát <jan.kundrat@cesnet.cz> for CESNET, a.l.e. */
+
+&am33xx_pinmux {
+ i2c1_pins: pinmux_i2c1_pins {
+ pinctrl-single,pins = <
+ AM33XX_IOPAD(0x958, SLEWCTRL_SLOW | PIN_INPUT_PULLUP | MUX_MODE2) /* P9_18, I2C1_SDA */
+ AM33XX_IOPAD(0x95c, SLEWCTRL_SLOW | PIN_INPUT_PULLUP | MUX_MODE2) /* P9_17, I2C1_SCL */
+ >;
+ };
+
+ i2c2_pins: pinmux_i2c2_pins {
+ pinctrl-single,pins = <
+ AM33XX_IOPAD(0x978, SLEWCTRL_SLOW | PIN_INPUT_PULLUP | MUX_MODE3) /* P9_20, I2C2_SDA */
+ AM33XX_IOPAD(0x97c, SLEWCTRL_SLOW | PIN_INPUT_PULLUP | MUX_MODE3) /* P9_19, I2C2_SCL */
+ >;
+ };
+
+ uart1_pins: pinmux_uart1_pins {
+ pinctrl-single,pins = <
+ AM33XX_IOPAD(0x980, PIN_INPUT | MUX_MODE0) /* P9_26, uart1_rxd */
+ AM33XX_IOPAD(0x984, PIN_OUTPUT | MUX_MODE0) /* P9_24, uart1_txd */
+ >;
+ };
+
+ uart2_pins: pinmux_uart2_pins {
+ pinctrl-single,pins = <
+ AM33XX_IOPAD(0x950, PIN_INPUT | MUX_MODE1) /* P9_22, uart2_rxd */
+ AM33XX_IOPAD(0x954, PIN_OUTPUT | MUX_MODE1) /* P9_21, uart2_txd */
+ >;
+ };
+
+ /* UART3: mode 1, rx N/A, tx p9_42 -> not used */
+
+ uart4_pins: pinmux_uart4_pins {
+ pinctrl-single,pins = <
+ AM33XX_IOPAD(0x870, PIN_INPUT | MUX_MODE6) /* P9_11, uart4_rxd */
+ AM33XX_IOPAD(0x874, PIN_OUTPUT | MUX_MODE6) /* P9_13, uart4_txd */
+ >;
+ };
+
+ uart5_pins: pinmux_uart5_pins {
+ pinctrl-single,pins = <
+ AM33XX_IOPAD(0x8c4, PIN_INPUT | MUX_MODE4) /* P8_38, uart5_rxd */
+ AM33XX_IOPAD(0x8c0, PIN_OUTPUT | MUX_MODE4) /* P8_37, uart5_txd */
+ >;
+ };
+};
+
+&i2c1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c1_pins>;
+ clock-frequency = <100000>;
+ status = "okay";
+};
+
+&i2c2 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c2_pins>;
+ clock-frequency = <100000>;
+ status = "okay";
+};
+
+&uart1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart1_pins>;
+ status = "okay";
+};
+
+&uart2 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart2_pins>;
+ status = "okay";
+};
+
+&uart4 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart4_pins>;
+ status = "okay";
+};
+
+&uart5 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart5_pins>;
+ status = "okay";
+};