brcm2708: update to latest patches from RPi Foundation

[openwrt/openwrt.git] / target / linux / brcm2708 / patches-4.19 / 950-0667-ARM-dts-bcm2711-rpi-4-b-I2C-aliases-and-pulls.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0667-ARM-dts-bcm2711-rpi-4-b-I2C-aliases-and-pulls.patch b/target/linux/brcm2708/patches-4.19/950-0667-ARM-dts-bcm2711-rpi-4-b-I2C-aliases-and-pulls.patch
new file mode 100644 (file)
index 0000000..daae20c
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0667-ARM-dts-bcm2711-rpi-4-b-I2C-aliases-and-pulls.patch
@@ -0,0 +1,67 @@
+From 188bd7c0085ac5b3d966aa899c6be644907157ea Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Mon, 12 Aug 2019 15:48:39 +0100
+Subject: [PATCH] ARM: dts: bcm2711-rpi-4-b: I2C aliases and pulls
+
+The I2C interface nodes need aliases to give them fixed bus numbers,
+and setting the pulls on the GPIOs (particularly 9-13) increases the
+chances of the bus working with weak or absent external pulls.
+
+See: https://www.raspberrypi.org/forums/posting.php?mode=reply&f=107&t=248439
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 10 ++++++++++
+ 1 file changed, 10 insertions(+)
+
+--- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
++++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
+@@ -23,6 +23,10 @@
+               mmc0 = &emmc2;
+               mmc1 = &mmcnr;
+               mmc2 = &sdhost;
++              i2c3 = &i2c3;
++              i2c4 = &i2c4;
++              i2c5 = &i2c5;
++              i2c6 = &i2c6;
+               /delete-property/ ethernet;
+               /delete-property/ intc;
+               ethernet0 = &genet;
+@@ -207,31 +211,37 @@
+       i2c0_pins: i2c0 {
+               brcm,pins = <0 1>;
+               brcm,function = <BCM2835_FSEL_ALT0>;
++              brcm,pull = <BCM2835_PUD_UP>;
+       };
+ 
+       i2c1_pins: i2c1 {
+               brcm,pins = <2 3>;
+               brcm,function = <BCM2835_FSEL_ALT0>;
++              brcm,pull = <BCM2835_PUD_UP>;
+       };
+ 
+       i2c3_pins: i2c3 {
+               brcm,pins = <4 5>;
+               brcm,function = <BCM2835_FSEL_ALT5>;
++              brcm,pull = <BCM2835_PUD_UP>;
+       };
+ 
+       i2c4_pins: i2c4 {
+               brcm,pins = <8 9>;
+               brcm,function = <BCM2835_FSEL_ALT5>;
++              brcm,pull = <BCM2835_PUD_UP>;
+       };
+ 
+       i2c5_pins: i2c5 {
+               brcm,pins = <12 13>;
+               brcm,function = <BCM2835_FSEL_ALT5>;
++              brcm,pull = <BCM2835_PUD_UP>;
+       };
+ 
+       i2c6_pins: i2c6 {
+               brcm,pins = <22 23>;
+               brcm,function = <BCM2835_FSEL_ALT5>;
++              brcm,pull = <BCM2835_PUD_UP>;
+       };
+ 
+       i2s_pins: i2s {