gpio: mmio: Drop bgpio_dir_inverted

The direction inversion semantics are now handled by simply
using the registers for in/out available, no need to keep
track of inversion semantics exmplicitly anymore.
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Jan Kotas <jank@cadence.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-mmio.c

@@ -533,13 +533,6 @@ static int bgpio_setup_direction(struct gpio_chip *gc,
 		gc->direction_output = bgpio_dir_out;
 		gc->direction_input = bgpio_dir_in;
 		gc->get_direction = bgpio_get_dir;
-		/*
-		 * If only dirin is available, this means we need
-		 * inverted semantics when handling get/set registers
-		 * so detect this here.
-		 */
-		if (dirin && !dirout)
-			gc->bgpio_dir_inverted = true;
 	} else {
 		if (flags & BGPIOF_NO_OUTPUT)
 			gc->direction_output = bgpio_dir_out_err;

include/linux/gpio/driver.h

@@ -229,9 +229,6 @@ struct gpio_irq_chip {
  * @reg_clr: output clear register (out=low) for generic GPIO
  * @reg_dir_out: direction out setting register for generic GPIO
  * @reg_dir_in: direction in setting register for generic GPIO
- * @bgpio_dir_inverted: indicates that the direction register is inverted
- *	(gpiolib private state variable) this means @reg_dir_in is
- *	available but not @reg_dir_out.
  * @bgpio_dir_unreadable: indicates that the direction register(s) cannot
  *	be read and we need to rely on out internal state tracking.
  * @bgpio_bits: number of register bits used for a generic GPIO i.e.
@@ -305,7 +302,6 @@ struct gpio_chip {
 	void __iomem *reg_clr;
 	void __iomem *reg_dir_out;
 	void __iomem *reg_dir_in;
-	bool bgpio_dir_inverted;
 	bool bgpio_dir_unreadable;
 	int bgpio_bits;
 	spinlock_t bgpio_lock;