@@ -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 {
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@ti.com> --- Link to v1: https://lore.kernel.org/all/20240822053538.10475-1-b-kapoor@ti.com/ 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(+)