bcm27xx: import latest patches from the RPi foundation

[openwrt/openwrt.git] / target / linux / bcm27xx / patches-5.4 / 950-0978-Update-hy28b-overlay.dts.patch

diff --git a/target/linux/bcm27xx/patches-5.4/950-0978-Update-hy28b-overlay.dts.patch b/target/linux/bcm27xx/patches-5.4/950-0978-Update-hy28b-overlay.dts.patch
new file mode 100644 (file)
index 0000000..48efb5a
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0978-Update-hy28b-overlay.dts.patch
@@ -0,0 +1,21 @@
+From 8c997be099769362cb201d360ad57b639e799e9e Mon Sep 17 00:00:00 2001
+From: newbloke82 <39644602+newbloke82@users.noreply.github.com>
+Date: Thu, 1 Oct 2020 19:16:35 +0200
+Subject: [PATCH] Update hy28b-overlay.dts
+
+My hy28b TFT stopped working on upgrade to 5.4 kernel.  I had a whitescreen but no obvious errors when using 'sudo vcdbg log msg' or 'dmesg'.  Both /dev/fb0 and /dev/fb1 were present.  Followed this article on waveshare32b that 'reset_gpios needed to be 0 0 1 instead of 0 0 0' (https://forum.armbian.com/topic/13233-any-clues-for-the-creation-of-a-dtoverlay-for-fbtft-on-54y/).  I applied a similar change to this dts file and compiled a new dtbo: 'dtc -O dtb -o hy28b.dtbo hy28b-overlay.dts'.  Fixed my issue - may help others?  I got from the 5.4 upgrade thread that other tft users are having issues with small tfts... https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=269769&p=1706597&hilit=gpio#p1706597
+---
+ arch/arm/boot/dts/overlays/hy28b-overlay.dts | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/arm/boot/dts/overlays/hy28b-overlay.dts
++++ b/arch/arm/boot/dts/overlays/hy28b-overlay.dts
+@@ -61,7 +61,7 @@
+                               fps = <50>;
+                               buswidth = <8>;
+                               startbyte = <0x70>;
+-                              reset-gpios = <&gpio 25 0>;
++                              reset-gpios = <&gpio 25 1>;
+                               led-gpios = <&gpio 18 1>;
+ 
+                               gamma = "04 1F 4 7 7 0 7 7 6 0\n0F 00 1 7 4 0 0 0 6 7";