diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2020-06-05 16:40:35 +0300 |
|---|---|---|
| committer | Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2020-06-16 12:22:41 +0300 |
| commit | 0b22c25e1b81c5f718e89c4d759e6a359be24417 (patch) | |
| tree | 302195bd7433448399e01cbcdee7152f26ee2897 /drivers/gpio/gpio-pca953x.c | |
| parent | ba8c90c6184784b397807b72403656085ac2f8c1 (diff) | |
| download | linux-0b22c25e1b81c5f718e89c4d759e6a359be24417.tar.xz | |
gpio: pca953x: Fix direction setting when configure an IRQ
The commit 0f25fda840a9 ("gpio: pca953x: Zap ad-hoc reg_direction cache")
seems inadvertently made a typo in pca953x_irq_bus_sync_unlock().
When the direction bit is 1 it means input, and the piece of code in question
was looking for output ones that should be turned to inputs.
Fix direction setting when configure an IRQ by injecting a bitmap complement
operation.
Fixes: 0f25fda840a9 ("gpio: pca953x: Zap ad-hoc reg_direction cache")
Depends-on: 35d13d94893f ("gpio: pca953x: convert to use bitmap API")
Cc: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Diffstat (limited to 'drivers/gpio/gpio-pca953x.c')
| -rw-r--r-- | drivers/gpio/gpio-pca953x.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index 4d3157d8b5cd..97c9ac31ecb5 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -696,8 +696,6 @@ static void pca953x_irq_bus_sync_unlock(struct irq_data *d) DECLARE_BITMAP(reg_direction, MAX_LINE); int level; - pca953x_read_regs(chip, chip->regs->direction, reg_direction); - if (chip->driver_data & PCA_PCAL) { /* Enable latch on interrupt-enabled inputs */ pca953x_write_regs(chip, PCAL953X_IN_LATCH, chip->irq_mask); @@ -708,7 +706,11 @@ static void pca953x_irq_bus_sync_unlock(struct irq_data *d) pca953x_write_regs(chip, PCAL953X_INT_MASK, irq_mask); } + /* Switch direction to input if needed */ + pca953x_read_regs(chip, chip->regs->direction, reg_direction); + bitmap_or(irq_mask, chip->irq_trig_fall, chip->irq_trig_raise, gc->ngpio); + bitmap_complement(reg_direction, reg_direction, gc->ngpio); bitmap_and(irq_mask, irq_mask, reg_direction, gc->ngpio); /* Look for any newly setup interrupt */ |