From 6c2628755161d04c7960f3f2fb7be1dacdda0c83 Mon Sep 17 00:00:00 2001 From: Phil Elwell Date: Mon, 12 Aug 2019 15:48:39 +0100 Subject: [PATCH 764/782] 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 --- 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 = ; + brcm,pull = ; }; i2c1_pins: i2c1 { brcm,pins = <2 3>; brcm,function = ; + brcm,pull = ; }; i2c3_pins: i2c3 { brcm,pins = <4 5>; brcm,function = ; + brcm,pull = ; }; i2c4_pins: i2c4 { brcm,pins = <8 9>; brcm,function = ; + brcm,pull = ; }; i2c5_pins: i2c5 { brcm,pins = <12 13>; brcm,function = ; + brcm,pull = ; }; i2c6_pins: i2c6 { brcm,pins = <22 23>; brcm,function = ; + brcm,pull = ; }; i2s_pins: i2s {