Re: [PATCH] i2c/busses: Add i2c-icy for I2C on m68k/Amiga

Geert Uytterhoeven
2019-08-12T11:07:25Z

Hi Max,

On Mon, Aug 12, 2019 at 12:43 PM Max Staudt <max@enpas.org> wrote:
> On 08/12/2019 11:37 AM, Geert Uytterhoeven wrote:
> >> + /*
> >> + * The 2019 a1k.org PCBs have an LTC2990 at 0x4c, so start
> >> + * it automatically once ltc2990 is modprobed.
> >> + *
> >> + * in0 is the voltage of the internal 5V power supply.
> >> + * temp1 is the temperature inside the chip.
> >> + *
> >> + * Configuration 0x18 enables all sensors on this PCB:
> >> + * # modprobe i2c-dev
> >> + * # i2cset 0 0x4c 1 0x18
> >
> > What's the reason for the i2cset command?
>
> It sets the sensor modes in the LTC2990 and enables the three sensors listed below. I should have clarified this.
>
> I tried to integrate this in the driver, but ltc2990 only allows reading this configuration out of a device tree. Is there a good way to fake a DT entry in the init function?

You can add platform_data support to the ltc2990 driver, and pass it
through i2c_board_info.platform_data.

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds