| Date | Wed, 22 Feb 2012 18:21:17 +0100 | Subject | Re: [PATCH 17/20] pinctrl: Add usecount to pins for muxing | From | Linus Walleij <> |
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On Mon, Feb 20, 2012 at 7:45 AM, Stephen Warren <swarren@nvidia.com> wrote:
> Multiple mapping table entries could reference the same pin, and hence > "own" it. This would be unusual now that pinctrl_get() represents a single > state for a client device, but in the future when it represents all known > states for a device, this is quite likely. Implement reference counting > for pin ownership to handle this. > > Signed-off-by: Stephen Warren <swarren@nvidia.com>
Seems like a good straight-forward way to solve this.
> diff --git a/drivers/pinctrl/core.h b/drivers/pinctrl/core.h > index 1290995..64ae1b8 100644 > --- a/drivers/pinctrl/core.h > +++ b/drivers/pinctrl/core.h > @@ -92,6 +92,7 @@ struct pin_desc { > bool dynamic_name; > /* These fields only added when supporting pinmux drivers */ > #ifdef CONFIG_PINMUX > + unsigned usecount;
kerneldoc for this? Preferably verbose...
Thanks, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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