| Message ID | 20171110134033.85461-1-andriy.shevchenko@linux.intel.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v1,1/6] gpiolib: acpi: Assign polarity when call acpi_populate_gpio_lookup() | expand |
On Fri, Nov 10, 2017 at 03:40:28PM +0200, Andy Shevchenko wrote: > There is no need, since we preserve firmware settings, to override > polarity for GpioInt() resources. > > While Documentation/gpio-properties.txt refers to any from GpioIo() / > GpioInt() resources, the active_low flag has been introduced to fill the > gap only for GpioIo() which lacks of that information. > > Moreover, in case of GpioInt() existed solution was broken anyway, it > overrides only in one direction, i.e. from 0 to 1, otherwise it would be > still 1 as defined in the resource macro. > > So, move the assignment to a right place and forbid to (semi-)override > polarity for GpioInt() type of resources. > > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> -- 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
On Friday, November 10, 2017 2:40:28 PM CET Andy Shevchenko wrote: > There is no need, since we preserve firmware settings, to override > polarity for GpioInt() resources. > > While Documentation/gpio-properties.txt refers to any from GpioIo() / > GpioInt() resources, the active_low flag has been introduced to fill the > gap only for GpioIo() which lacks of that information. > > Moreover, in case of GpioInt() existed solution was broken anyway, it > overrides only in one direction, i.e. from 0 to 1, otherwise it would be > still 1 as defined in the resource macro. > > So, move the assignment to a right place and forbid to (semi-)override > polarity for GpioInt() type of resources. I'm assuming that this series is targeted at the GPIO subsystem. Please let me know if that's not the case. Thanks, Rafael -- 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
On Sat, 2017-11-18 at 15:55 +0100, Rafael J. Wysocki wrote: > On Friday, November 10, 2017 2:40:28 PM CET Andy Shevchenko wrote: > I'm assuming that this series is targeted at the GPIO subsystem. That's correct.
On Fri, Nov 10, 2017 at 2:40 PM, Andy Shevchenko <andriy.shevchenko@linux.intel.com> wrote: > There is no need, since we preserve firmware settings, to override > polarity for GpioInt() resources. > > While Documentation/gpio-properties.txt refers to any from GpioIo() / > GpioInt() resources, the active_low flag has been introduced to fill the > gap only for GpioIo() which lacks of that information. > > Moreover, in case of GpioInt() existed solution was broken anyway, it > overrides only in one direction, i.e. from 0 to 1, otherwise it would be > still 1 as defined in the resource macro. > > So, move the assignment to a right place and forbid to (semi-)override > polarity for GpioInt() type of resources. > > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Patch applied with Mika'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/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index eb4528c87c0b..2a85d27eb028 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -531,8 +531,8 @@ static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data) lookup->info.triggering = agpio->triggering; } else { lookup->info.flags = acpi_gpio_to_gpiod_flags(agpio); + lookup->info.polarity = lookup->active_low; } - } return 1; @@ -557,11 +557,8 @@ static int acpi_gpio_resource_lookup(struct acpi_gpio_lookup *lookup, if (!lookup->desc) return -ENOENT; - if (info) { + if (info) *info = lookup->info; - if (lookup->active_low) - info->polarity = lookup->active_low; - } return 0; }
There is no need, since we preserve firmware settings, to override polarity for GpioInt() resources. While Documentation/gpio-properties.txt refers to any from GpioIo() / GpioInt() resources, the active_low flag has been introduced to fill the gap only for GpioIo() which lacks of that information. Moreover, in case of GpioInt() existed solution was broken anyway, it overrides only in one direction, i.e. from 0 to 1, otherwise it would be still 1 as defined in the resource macro. So, move the assignment to a right place and forbid to (semi-)override polarity for GpioInt() type of resources. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> --- drivers/gpio/gpiolib-acpi.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-)