Hi Wolfram,
On Thu, Dec 14, 2017 at 11:30 PM, Wolfram Sang
<wsa+renesas@xxxxxxxxxxxxxxxxxxxx> wrote:
> Make it possible to fallback to GPIO for I2C4 on the EXIO-E connector.
>
> This is based on reference work for the I2C0 core of the lager/r8a7790
> by Wolfram Sang.
>
> Signed-off-by: Simon Horman <horms+renesas@xxxxxxxxxxxx>
> [wsa: rebased, fixed aliases, switched to named GPIOS]
> Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
> --- a/arch/arm/boot/dts/r8a7791-koelsch.dts
> +++ b/arch/arm/boot/dts/r8a7791-koelsch.dts
> @@ -480,6 +504,11 @@
> function = "i2c2";
> };
>
> + i2c4_pins: i2c4 {
> + groups = "i2c4";
> + function = "i2c4";
> + };
This change breaks VIN:
-rcar-vin e6ef0000.video: Device registered as video25
+sh-pfc e6060000.pin-controller: pin GP_4_13 already requested by
e6520000.i2c; cannot claim for e6ef0000.video
+sh-pfc e6060000.pin-controller: pin-141 (e6ef0000.video) status -22
+sh-pfc e6060000.pin-controller: could not request pin 141 (GP_4_13)
from group vin0_data24 on device sh-pfc
+rcar-vin e6ef0000.video: Error applying setting, reverse things back
+rcar-vin: probe of e6ef0000.video failed with error -22
I2C4 on Koelsch uses pins GP7_13/14 (group "i2c4_c"), not GP4_13/14
(group "i2c4").
Fixing it up in today's renesas-drivers release.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
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
