On Sun, Nov 6, 2016 at 9:20 PM, Wolfram Sang
<wsa+renesas@xxxxxxxxxxxxxxxxxxxx> wrote:
> Some drivers like i2c-gpio do not have dedicated pinctrl states. They
> broke when error checking for pinctrl was added. Detect them now, and in
> their case, simply skip over pinctrl configuration.
>
> Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
> ---
> drivers/i2c/muxes/i2c-demux-pinctrl.c | 22 ++++++++++++++++++++--
> 1 file changed, 20 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/i2c/muxes/i2c-demux-pinctrl.c b/drivers/i2c/muxes/i2c-demux-pinctrl.c
> index b3893f6282ba5b..3e6fe1760d82fc 100644
> --- a/drivers/i2c/muxes/i2c-demux-pinctrl.c
> +++ b/drivers/i2c/muxes/i2c-demux-pinctrl.c
> @@ -69,10 +69,28 @@ static int i2c_demux_activate_master(struct i2c_demux_pinctrl_priv *priv, u32 ne
> goto err_with_revert;
> }
>
> - p = devm_pinctrl_get_select(adap->dev.parent, priv->bus_name);
> + /*
> + * Check if there are pinctrl states at all. Note: we cant' use
can't
> + * devm_pinctrl_get_select() because we need to distinguish between
> + * the -ENODEV from devm_pinctrl_get() and pinctrl_lookup_state().
> + */
> + p = devm_pinctrl_get(adap->dev.parent);
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
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