| Message ID | 1432305354-5968-2-git-send-email-grygorii.strashko@linaro.org |
|---|---|
| State | Accepted |
| Commit | 5f982c70a7c3382d3532ac6d13fdea48ab38b934 |
| Headers | show |
On Fri, May 22, 2015 at 4:35 PM, Grygorii Strashko <grygorii.strashko@linaro.org> wrote: > This patch fixes following issue: > - GPIOn is used as IRQ by some dev, for example PCF8575.INT -> gpio6.11 > - PCFx driver knows nothing about type of IRQ line (GPIO or not) > so it doesn't request gpio and just do request_irq() > - If gpio6.11 will be exported through the sysfs and then un-xeported > then IRQs from PCFx will not be received any more, because > IRQ configuration for gpio6.11 will be cleaned up unconditionally > in omap_gpio_free. > > Fix this by removing all GPIO IRQ specific code from omap_gpio_free() > and also do GPIO clean up (change direction to 'in' and disable debounce) > only if corresponding GPIO is not used as IRQ too. > GPIO IRQ will be properly cleaned up by GPIO irqchip code. > > Signed-off-by: Grygorii Strashko <grygorii.strashko@linaro.org> Can I get an ACK or comment from one of the three (!) maintainers on atleast these non-RFC patches? 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-omap.c b/drivers/gpio/gpio-omap.c index b232397..bb60cbc 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -690,8 +690,11 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset) spin_lock_irqsave(&bank->lock, flags); bank->mod_usage &= ~(BIT(offset)); + if (!LINE_USED(bank->irq_usage, offset)) { + omap_set_gpio_direction(bank, offset, 1); + omap_clear_gpio_debounce(bank, offset); + } omap_disable_gpio_module(bank, offset); - omap_reset_gpio(bank, offset); spin_unlock_irqrestore(&bank->lock, flags); /*
This patch fixes following issue: - GPIOn is used as IRQ by some dev, for example PCF8575.INT -> gpio6.11 - PCFx driver knows nothing about type of IRQ line (GPIO or not) so it doesn't request gpio and just do request_irq() - If gpio6.11 will be exported through the sysfs and then un-xeported then IRQs from PCFx will not be received any more, because IRQ configuration for gpio6.11 will be cleaned up unconditionally in omap_gpio_free. Fix this by removing all GPIO IRQ specific code from omap_gpio_free() and also do GPIO clean up (change direction to 'in' and disable debounce) only if corresponding GPIO is not used as IRQ too. GPIO IRQ will be properly cleaned up by GPIO irqchip code. Signed-off-by: Grygorii Strashko <grygorii.strashko@linaro.org> --- drivers/gpio/gpio-omap.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)