System firmware uses main_uart5 in J722S EVM for trace data. Thus, describe it in device tree for completeness, adding the pinmux and mark it as reserved. Signed-off-by: Bhavya Kapoor <b-kapoor@xxxxxx> --- Link to v1: https://lore.kernel.org/all/20240822053538.10475-1-b-kapoor@xxxxxx/ changelog v1->v2: - Modified commit message to be more clear - provide documentation on why main_uart5 is reserved arch/arm64/boot/dts/ti/k3-j722s-evm.dts | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/arm64/boot/dts/ti/k3-j722s-evm.dts b/arch/arm64/boot/dts/ti/k3-j722s-evm.dts index 8daa47a245aa..41c36f82a3c5 100644 --- a/arch/arm64/boot/dts/ti/k3-j722s-evm.dts +++ b/arch/arm64/boot/dts/ti/k3-j722s-evm.dts @@ -20,6 +20,7 @@ / { aliases { serial0 = &wkup_uart0; serial2 = &main_uart0; + serial3 = &main_uart5; mmc0 = &sdhci0; mmc1 = &sdhci1; }; @@ -211,6 +212,13 @@ J722S_IOPAD(0x01cc, PIN_OUTPUT, 0) /* (B22) UART0_TXD */ bootph-all; }; + main_uart5_pins_default: main-uart5-default-pins { + pinctrl-single,pins = < + J722S_IOPAD(0x0108, PIN_INPUT, 3) /* (J27) UART5_RXD */ + J722S_IOPAD(0x010c, PIN_OUTPUT, 3) /* (H27) UART5_TXD */ + >; + }; + vdd_sd_dv_pins_default: vdd-sd-dv-default-pins { pinctrl-single,pins = < J722S_IOPAD(0x0120, PIN_INPUT, 7) /* (F27) MMC2_CMD.GPIO0_70 */ @@ -330,6 +338,13 @@ &main_uart0 { bootph-all; }; +&main_uart5 { + /* MAIN UART 5 is used by System firmware */ + pinctrl-names = "default"; + pinctrl-0 = <&main_uart5_pins_default>; + status = "reserved"; +}; + &mcu_pmx0 { mcu_mcan0_pins_default: mcu-mcan0-default-pins { -- 2.34.1
