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Signed-off-by: Timofey Titovets <nefelim4ag@gmail.com>
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Signed-off-by: Timofey Titovets <nefelim4ag@gmail.com>
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Similar to commit df79893, this allows klipper to use up to
/dev/i2c-14. Similar to before, this limit is arbitrary.
This is required for some other SoCs, which have even
more i2c buses available, e.g. the rk3399:
$ ls -1 /dev/i2c-*
/dev/i2c-0
/dev/i2c-3
/dev/i2c-7
Signed-off-by: Carl Richard Theodor Schneider <dev.github@crtified.me>
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Reading an I2C device from the Linux MCU used a separate write(2)
to select the target register & read(2) to get the value(s). This
implementation uses ioctl(file, I2C_RDWR, ...) to skip a large bus idle
period and extra process sleep by combining them like the stm32.
I2C_RDRW requires I2C_FUNC_I2C flag in the I2C driver. I2C_FUNC_I2C
is defined in:
BCM2835: Pi 1 Models A, A+, B, B+, the Raspberry Pi Zero, the
Raspberry Pi Zero W, and the Raspberry Pi Compute Module 1
BCM2836: Pi 2 Model B
Identical to BCM2835 except Cortex
BCM2837: Pi 3 Model B, later models of the Raspberry Pi 2 Model B,
and the Raspberry Pi Compute Module 3
BCM2837B0: Pi 3 Models A+, B+, and the Raspberry Pi Compute Module 3+
BCM2711: Pi 4 Model B, the Raspberry Pi 400, and the Raspberry Pi
Compute Module 4
RK3xxx: Rockchips SoCs NanoPi, RockPi, Tinker, etc.
SUNXI: H2, H3, etc. Orange Pi
AMLOGIC: S905x, Banana Pi, Odroid, etc.
TEGRA: NVidia Jetson etc.
MediaTek: Several SBCs in other ranges
Signed-off-by: Matthew Swabey <matthew@swabey.org>
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Similarly to commit 8cf1b512 for SPI, the Rpi4 has more i2c busses to offer
This change allows klipper to use up to I2c bus 6
/boot/configtxt
dtparam=i2c_arm=on
dtoverlay=i2c6
and
pi@fluiddpi:~ $ ls -1 /dev/i2c*
/dev/i2c-1
/dev/i2c-6
Signed-off-by: Sylvain Dansereau <brutus_dansereau@hotmail.com>
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Signed-off-by: Lucio Tarantino <lucio.tarantino@gmail.com>
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Signed-off-by: Eric Callahan <arksine.code@gmail.com>
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