| From 197b4fbd218a0a12573cdfcb011eeb3f00765d96 Mon Sep 17 00:00:00 2001 |
| From: Phil Elwell <phil@raspberrypi.com> |
| Date: Fri, 17 Jul 2020 11:20:07 +0100 |
| Subject: [PATCH] ARM: dts: Add UART skip-init properties for U-boot |
| |
| U-boot can get stuck trying to initialise UARTs that aren't mapped |
| to the pin header. There is no reason for U-boot not to rely on the |
| initialisation by the firmware, so tag both UARTs with the u-boot |
| magic boolean property "skip-init". |
| |
| See: https://github.com/raspberrypi/linux/pull/3731 |
| https://lists.denx.de/pipermail/u-boot/2017-April/285606.html |
| |
| Signed-off-by: Phil Elwell <phil@raspberrypi.com> |
| --- |
| arch/arm/boot/dts/bcm270x-rpi.dtsi | 8 ++++++++ |
| 1 file changed, 8 insertions(+) |
| |
| --- a/arch/arm/boot/dts/bcm270x-rpi.dtsi |
| +++ b/arch/arm/boot/dts/bcm270x-rpi.dtsi |
| @@ -102,6 +102,14 @@ |
| }; |
| }; |
| |
| +&uart0 { |
| + skip-init; |
| +}; |
| + |
| +&uart1 { |
| + skip-init; |
| +}; |
| + |
| &txp { |
| status = "disabled"; |
| }; |