diff options
| author | Grigoryev Denis <grigoryev@fastwel.ru> | 2018-05-04 19:53:18 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2018-05-23 12:47:26 +0300 |
| commit | 0a70fe00efea7c6ac087a10aa57131e59d63e194 (patch) | |
| tree | 34b2b86251c9e770813ce87a9f7998dc37ef4ab5 /drivers/gpio/gpio-pca953x.c | |
| parent | 060f3ebf6a9a4a92dd92149e6ebffae10679ed17 (diff) | |
| download | linux-0a70fe00efea7c6ac087a10aa57131e59d63e194.tar.xz | |
gpio: pca953x: Clear irq trigger type on irq shutdown
The driver stores the result of irq_set_type() in the internal variables
irq_trig_raise and irq_trig_fall, which later are used to determine
the GPIOs that must be re-configured as input. These variables retain their
value between gpiolib's export / unexport, resulting in an incorrect
state in some cases. The corresponding bits in the variables
irq_trig_raise and irq_trig_fall should be cleared in irq_shutdown().
Signed-off-by: Denis Grigoryev <grigoryev@fastwel.ru>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-pca953x.c')
| -rw-r--r-- | drivers/gpio/gpio-pca953x.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index 6e3ddeae127f..d01e09d37573 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -532,6 +532,15 @@ static int pca953x_irq_set_type(struct irq_data *d, unsigned int type) return 0; } +static void pca953x_irq_shutdown(struct irq_data *d) +{ + struct pca953x_chip *chip = irq_data_get_irq_chip_data(d); + u8 mask = 1 << (d->hwirq % BANK_SZ); + + chip->irq_trig_raise[d->hwirq / BANK_SZ] &= ~mask; + chip->irq_trig_fall[d->hwirq / BANK_SZ] &= ~mask; +} + static struct irq_chip pca953x_irq_chip = { .name = "pca953x", .irq_mask = pca953x_irq_mask, @@ -539,6 +548,7 @@ static struct irq_chip pca953x_irq_chip = { .irq_bus_lock = pca953x_irq_bus_lock, .irq_bus_sync_unlock = pca953x_irq_bus_sync_unlock, .irq_set_type = pca953x_irq_set_type, + .irq_shutdown = pca953x_irq_shutdown, }; static bool pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending) |