gpio: pca953x: Fix direction setting when configure an IRQ

The commit 0f25fda ("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: 0f25fda ("gpio: pca953x: Zap ad-hoc reg_direction cache")
Depends-on: 35d13d9 ("gpio: pca953x: convert to use bitmap API")
Cc: Marek Vasut <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>
Signed-off-by: Bartosz Golaszewski <[email protected]>

Author: andy-shev

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 */