From mboxrd@z Thu Jan 1 00:00:00 1970 From: Geert Uytterhoeven Subject: Re: [PATCH] i2c/busses: Add i2c-icy for I2C on m68k/Amiga Date: Mon, 12 Aug 2019 13:07:25 +0200 Message-ID: References: <20190811043253.24938-1-max@enpas.org> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Max Staudt Cc: Linux I2C , Wolfram Sang , Linux/m68k , Linux Kernel Mailing List , John Paul Adrian Glaubitz List-Id: linux-m68k@vger.kernel.org Hi Max, On Mon, Aug 12, 2019 at 12:43 PM Max Staudt 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