Hi!
> The twl4030 phy can measure, with low precision, the
> resistance-to-ground of the ID pin.
>
> Add a function to read the value, and export the result
> via sysfs.
>
> If the read fails, which it does sometimes, try again in 50msec.
>
> Signed-off-by: NeilBrown <neilb@xxxxxxx>
> ---
> drivers/phy/phy-twl4030-usb.c | 63 +++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 63 insertions(+)
>
> diff --git a/drivers/phy/phy-twl4030-usb.c b/drivers/phy/phy-twl4030-usb.c
> index 023fe150c7a1..759950898df9 100644
> --- a/drivers/phy/phy-twl4030-usb.c
> +++ b/drivers/phy/phy-twl4030-usb.c
> @@ -374,6 +374,56 @@ static void twl4030_i2c_access(struct twl4030_usb *twl, int on)
> }
> }
>
> +enum twl4030_id_status {
> + TWL4030_GROUND,
> + TWL4030_102K,
> + TWL4030_200K,
> + TWL4030_440K,
> + TWL4030_FLOATING,
> + TWL4030_ID_UNKNOWN,
> +};
> +static char *twl4030_id_names[] = {
> + "ground",
> + "102k",
> + "200k",
> + "440k",
New /sys files should be documented somewhere...?
Does it make sense to change "440k" -> "440KOhm"?
Plus I guess you need to update Documentation/
Acked-by: Pavel Machek <pavel@xxxxxx>
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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