diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0665-ARM-dts-bcm2711-rpi-4-b-I2C-aliases-and-pulls.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0665-ARM-dts-bcm2711-rpi-4-b-I2C-aliases-and-pulls.patch | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0665-ARM-dts-bcm2711-rpi-4-b-I2C-aliases-and-pulls.patch b/target/linux/bcm27xx/patches-4.19/950-0665-ARM-dts-bcm2711-rpi-4-b-I2C-aliases-and-pulls.patch new file mode 100644 index 0000000000..daae20c0d5 --- /dev/null +++ b/target/linux/bcm27xx/patches-4.19/950-0665-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 { |