Although we currently use the MAIN_UART0 for R5 SPL console output there
are cases where we require access to the MCU_UART0 as well for example in
case of UART-based Y-Modem boot. To support these scenarios add related
DTS definitions to be able to use that UART early on.
Signed-off-by: Andreas Dannenberg
---
arch/arm/dts/k3-am654-r5-base-board.dts | 19 +++
1 file changed, 19 insertions(+)
diff --git a/arch/arm/dts/k3-am654-r5-base-board.dts
b/arch/arm/dts/k3-am654-r5-base-board.dts
index 7ed307f0d8..e31ed4fe64 100644
--- a/arch/arm/dts/k3-am654-r5-base-board.dts
+++ b/arch/arm/dts/k3-am654-r5-base-board.dts
@@ -16,6 +16,7 @@
aliases {
serial0 = &wkup_uart0;
+ serial1 = &mcu_uart0;
serial2 = &main_uart0;
};
@@ -118,6 +119,14 @@
status = "okay";
};
+&mcu_uart0 {
+ u-boot,dm-spl;
+ pinctrl-names = "default";
+ pinctrl-0 = <&mcu_uart0_pins_default>;
+ clock-frequency = <4800>;
+ status = "okay";
+};
+
&main_uart0 {
power-domains = <&k3_pds 146 TI_SCI_PD_SHARED>;
};
@@ -141,6 +150,16 @@
u-boot,dm-spl;
};
+ mcu_uart0_pins_default: mcu_uart0_pins_default {
+ pinctrl-single,pins = <
+ AM65X_WKUP_IOPAD(0x0044, PIN_INPUT, 4) /* (P4)
MCU_OSPI1_D1.MCU_UART0_RXD */
+ AM65X_WKUP_IOPAD(0x0048, PIN_OUTPUT, 4) /* (P5)
MCU_OSPI1_D2.MCU_UART0_TXD */
+ AM65X_WKUP_IOPAD(0x004C, PIN_INPUT, 4) /* (P1)
MCU_OSPI1_D3.MCU_UART0_CTSn */
+ AM65X_WKUP_IOPAD(0x0054, PIN_OUTPUT, 4) /* (N3)
MCU_OSPI1_CSn1.MCU_UART0_RTSn */
+ >;
+ u-boot,dm-spl;
+ };
+
wkup_i2c0_pins_default: wkup-i2c0-pins-default {
pinctrl-single,pins = <
AM65X_WKUP_IOPAD(0x00e0, PIN_INPUT, 0) /* (AC7)
WKUP_I2C0_SCL */
--
2.17.1
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