diff options
| author | Russell King <rmk+kernel@armlinux.org.uk> | 2016-12-08 00:00:49 +0000 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2024-04-16 16:52:31 +0100 |
| commit | ff7afcf99f4c03d4e62e0ae4544005a39b6914ef (patch) | |
| tree | 3614941241006297ad0b5c11991f19c30151ee3e /arch | |
| parent | 7b3f9645f7d3f4e9b4b061fc351dd8859550ba04 (diff) | |
arm64: dts: marvell: mcbin: workaround wrongly wired i2c1 bus
The I2C1 bus on early mcbin hardware is mis-wired, swapping SCL and SDA.
Work around this by using the i2c-gpio driver instead. XXX Caught early
and this commit should be removed for mainline. XXX
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/boot/dts/marvell/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm64/boot/dts/marvell/armada-8040-mcbin-es.dts | 9 | ||||
| -rw-r--r-- | arch/arm64/boot/dts/marvell/armada-8040-mcbin.dtsi | 21 |
3 files changed, 29 insertions, 2 deletions
diff --git a/arch/arm64/boot/dts/marvell/Makefile b/arch/arm64/boot/dts/marvell/Makefile index 99b8cb3c49e1..090d2da6999e 100644 --- a/arch/arm64/boot/dts/marvell/Makefile +++ b/arch/arm64/boot/dts/marvell/Makefile @@ -15,6 +15,7 @@ dtb-$(CONFIG_ARCH_MVEBU) += armada-7040-mochabin.dtb dtb-$(CONFIG_ARCH_MVEBU) += armada-8040-clearfog-gt-8k.dtb dtb-$(CONFIG_ARCH_MVEBU) += armada-8040-db.dtb dtb-$(CONFIG_ARCH_MVEBU) += armada-8040-mcbin.dtb +dtb-$(CONFIG_ARCH_MVEBU) += armada-8040-mcbin-es.dtb dtb-$(CONFIG_ARCH_MVEBU) += armada-8040-mcbin-singleshot.dtb dtb-$(CONFIG_ARCH_MVEBU) += armada-8040-puzzle-m801.dtb dtb-$(CONFIG_ARCH_MVEBU) += armada-8080-db.dtb diff --git a/arch/arm64/boot/dts/marvell/armada-8040-mcbin-es.dts b/arch/arm64/boot/dts/marvell/armada-8040-mcbin-es.dts new file mode 100644 index 000000000000..2bc49b60cd06 --- /dev/null +++ b/arch/arm64/boot/dts/marvell/armada-8040-mcbin-es.dts @@ -0,0 +1,9 @@ +#define MCBIN_BROKEN_I2C1 +#include "armada-8040-mcbin.dts" + +/ { + model = "Marvell 8040 MACCHIATOBin Double shot (engineering sample)"; + compatible = "marvell,armada8040-mcbin-doubleshot", + "marvell,armada8040-mcbin", "marvell,armada8040", + "marvell,armada-ap806-quad", "marvell,armada-ap806"; +}; diff --git a/arch/arm64/boot/dts/marvell/armada-8040-mcbin.dtsi b/arch/arm64/boot/dts/marvell/armada-8040-mcbin.dtsi index 077f4a41063b..446e3f15b2a0 100644 --- a/arch/arm64/boot/dts/marvell/armada-8040-mcbin.dtsi +++ b/arch/arm64/boot/dts/marvell/armada-8040-mcbin.dtsi @@ -106,6 +106,23 @@ pinctrl-0 = <&cp0_sfp_1g_pins &cp1_sfp_1g_pins>; maximum-power-milliwatt = <2000>; }; + +#ifdef MCBIN_BROKEN_I2C1 + /* work-around the wrongly wired I2C bus on Rev 1.1 boards */ + broken_i2c1: i2c-controller@0 { + compatible = "i2c-gpio"; + gpios = <&cp0_gpio2 4 GPIO_ACTIVE_HIGH>, + <&cp0_gpio2 3 GPIO_ACTIVE_HIGH>; + i2c-gpio,delay-us = <2>; + #address-cells = <1>; + #size-cells = <0>; + }; +#define I2C1 broken_i2c1 +#define I2C1_PINMUX "gpio" +#else +#define I2C1 cp0_i2c1 +#define I2C1_PINMUX "i2c1" +#endif }; &uart0 { @@ -136,7 +153,7 @@ status = "okay"; }; -&cp0_i2c1 { +&I2C1 { clock-frequency = <100000>; pinctrl-names = "default"; pinctrl-0 = <&cp0_i2c1_pins>; @@ -205,7 +222,7 @@ /* mpp33 - mss? */ cp0_i2c1_pins: i2c1-pins { marvell,pins = "mpp35", "mpp36"; - marvell,function = "i2c1"; + marvell,function = I2C1_PINMUX; }; cp0_i2c0_pins: i2c0-pins { marvell,pins = "mpp37", "mpp38"; |