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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Date: Sat, 25 Oct 2025 07:48:45 +0000 (UTC) X-CM-Envelope: MS4xfNbsPdM62VTveJLHS0nVTVS2xxaYXJ6YdW6ajWNdp/mA0kbdYO+BGBUhFm02m04YCKCThe5yJYR3xnHcl+AlWj+K0trd5PN8iDeBwHcVRLpI+OoTGl7U 337g9vfVrYUr5a5ZDAs6oDAaB0kTDnJ0peJLUDbDEjcEmg5CebN8eOC9vQNcZU8fK5jhudVRUHPFN2y1SFgktQXGVojal6Kj1bk5FtPw5NutmYMXzSvZ2fgZ ZpGo3R0NucpsUqcr6b3ukJnslKtZh5SCsKxfI8rjkbes7WihQznaX9s3Sh+FKAlIONAyVHioAaTJ31jVrwdiGCir1JkjJnQ60CXMp5E/fs21TAvGm/YTJqe0 PgiBz9YUtw7gKWltfz3q9lRHYuWOPiRakeb4+roaflJk/FssNEpHzBUwQvJxZ44xdwLCgiT1 X-CM-Analysis: v=2.4 cv=etGNzZpX c=1 sm=1 tr=0 ts=68fc80dd a=rByZg85q4TxBe4aD0HbSyg==:617 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=NEAV23lmAAAA:8 a=d70CFdQeAAAA:8 a=-a8RYutpcgMjrEULmycA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=NcxpMcIZDGm-g932nG_k:22 X-AuthUser: michael.opdenacker@rootcommit.com Greetings, On 10/25/25 09:45, michael.opdenacker@rootcommit.com wrote: > From: Michael Opdenacker > > The OrangePi RV2 board exposes i2c2 and i2c8 buses from the Spacemit K1 SoC. > > Signed-off-by: Michael Opdenacker > --- > arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts > index 41dc8e35e6eb..c4b25dd30f54 100644 > --- a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts > +++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts > @@ -17,6 +17,8 @@ aliases { > serial0 = &uart0; > ethernet0 = ð0; > ethernet1 = ð1; > + i2c2 = &i2c2; > + i2c8 = &i2c8; > }; > > chosen { > @@ -81,6 +83,18 @@ rgmii1: phy@1 { > }; > }; > > +&i2c2 { > + pinctrl-0 = <&i2c2_0_cfg>; > + pinctrl-names = "default"; > + status = "okay"; > +}; > + > +&i2c8 { > + pinctrl-0 = <&i2c8_cfg>; > + pinctrl-names = "default"; > + status = "okay"; > +}; > + > &pdma { > status = "okay"; > }; Unfortunately, these changes are not functional yet on OrangePi RV2, testing on https://github.com/spacemit-com/linux/commits/k1/dt-for-next # i2cdetect -r 2 WARNING! This program can confuse your I2C bus, cause data loss and worse! I will probe file /dev/i2c-2 using receive byte commands. I will probe address range 0x08-0x77. Continue? [Y/n]      0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f 00:        [  124.675321] i2c-k1 d4012000.i2c: i2c transfer failed, ret -11 err 0x400000                  -- 09 [  124.686769] i2c-k1 d4012000.i2c: i2c transfer failed, ret -11 err 0x400000 -- 0b [  124.695584] i2c-k1 d4012000.i2c: i2c transfer failed, ret -11 err 0x400000 -- 0d [  124.702945] i2c-k1 d4012000.i2c: i2c transfer failed, ret -11 err 0x400000 -- 0f 10: [  124.710346] i2c-k1 d4012000.i2c: i2c transfer failed, ret -11 err 0x400000 -- 11 [  124.718221] i2c-k1 d4012000.i2c: i2c transfer failed, ret -11 err 0x400000 -- 13 [  124.725607] i2c-k1 d4012000.i2c: i2c transfer failed, ret -11 err 0x400000 -- 15 [  124.732994] i2c-k1 d4012000.i2c: i2c transfer failed, ret -11 err 0x400000 -- 17 [  124.739480] i2c-k1 d4012000.i2c: i2c transfer failed, ret -11 err 0x400000 -- 19 [  124.747480] i2c-k1 d4012000.i2c: i2c transfer failed, ret -11 err 0x400000 -- 1b [  124.755108] i2c-k1 d4012000.i2c: i2c transfer failed, ret -11 err 0x400000 -- 1d [  124.762500] i2c-k1 d4012000.i2c: i2c transfer failed, ret -11 err 0x400000 -- 1f ... I assume the i2c-k1 driver works on BananaPi F3. Any clues why the same buses don't work OrangePi RV2? Thanks in advance Cheers Michael. -- Michael Opdenacker Root Commit Yocto Project and OpenEmbedded Training course - Learn by doing: https://rootcommit.com/training/yocto/