Adds an I2C master driver for the AM67 I2C instances, completing transfers on
ARDY as the K3 controller signals.
Bring-up is deferred to the first transfer, because the Linux Device Manager
enables the I2C clocks late and touching the bus during early board init is not
safe here. The last reference drop clears the flag so the next transfer
re-initialises the hardware.
t3-gem-o1 registers WKUP_I2C0 as /dev/i2c2.
Verified on t3-gem-o1: i2c dev finds 0x30, 0x40, 0x51 and 0x68, the RTC at
0x68 reads a ticking BCD seconds register, repeated reads are consistent, and
NACK recovery returns the bus to a usable state.
Assisted-by: Claude Code:claude-fable-5
Assisted-by: Claude Code:claude-opus-4-8
Signed-off-by: Ulaş Sertan Kemeç <sertan.usk@gmail.com>
This commit introduces basic support for running NuttX on
main domain R5F core of TI AM67 chips, including irq, mpu, pinmux,
timer, and serial configurations. Currently only UART console is
supported. NuttX can be loaded into R5F core from U-Boot or Linux
via RemoteProc.
Co-authored-by: Emre Cecanpunar <emreleno@gmail.com>
Co-authored-by: Abdullah Türkmen <abdullahturkmen@protonmail.com>
Co-authored-by: Muhammet Onur Bayraktar <mobayraktar@t3gemstone.org>
Co-authored-by: Bayram Akay <bakay@t3gemstone.org>
Signed-off-by: Erkan Vatan <evatan@t3gemstone.org>
