| Message ID | 1473299296-22458-4-git-send-email-vladimir_zapolskiy@mentor.com |
|---|---|
| State | New |
| Headers | show |
On Thu, Sep 8, 2016 at 3:48 AM, Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> wrote: > If a GPIO controller description in board DTB contains information > about mappings between GPIOs and pads under IOMUX control use it to > request and free GPIOs with respect to pinctrl/pinmux subsystems. > > One of immediate positive functional changes is inability to > request non-existing GPIOs, i.e. if there is no pad such. Also > pinctrl/pinmux may now properly account pads occupied by requested > GPIOs. > > The change has no effect, if "gpio-ranges" property is not found > including the case if a board has no DTB firmware. > > Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> > --- > Changes from v1 to v2: > * none Patch applied with Shawn's ACK. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c index 1fdd5d804b5b..e38989a4fa0c 100644 --- a/drivers/gpio/gpio-mxc.c +++ b/drivers/gpio/gpio-mxc.c @@ -458,6 +458,11 @@ static int mxc_gpio_probe(struct platform_device *pdev) if (err) goto out_bgio; + if (of_property_read_bool(np, "gpio-ranges")) { + port->gc.request = gpiochip_generic_request; + port->gc.free = gpiochip_generic_free; + } + port->gc.to_irq = mxc_gpio_to_irq; port->gc.base = (pdev->id < 0) ? of_alias_get_id(np, "gpio") * 32 : pdev->id * 32;
If a GPIO controller description in board DTB contains information about mappings between GPIOs and pads under IOMUX control use it to request and free GPIOs with respect to pinctrl/pinmux subsystems. One of immediate positive functional changes is inability to request non-existing GPIOs, i.e. if there is no pad such. Also pinctrl/pinmux may now properly account pads occupied by requested GPIOs. The change has no effect, if "gpio-ranges" property is not found including the case if a board has no DTB firmware. Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> --- Changes from v1 to v2: * none drivers/gpio/gpio-mxc.c | 5 +++++ 1 file changed, 5 insertions(+)