linux-kernel - [PATCH 2/2] gpio: pca953x.c: Use pca953x_read_regs instead of regmap_bulk

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Message-Id: <20190827064629.90214-2-david@protonic.nl>
Date:   Tue, 27 Aug 2019 06:46:29 +0000
From:   David Jander <david@...tonic.nl>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Bartosz Golaszewski <bgolaszewski@...libre.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        David Jander <david@...tonic.nl>
Subject: [PATCH 2/2] gpio: pca953x.c: Use pca953x_read_regs instead of regmap_bulk_read

The register number needs to be translated for chips with more than 8
ports. This patch fixes a bug causing all chips with more than 8 GPIO pins
to not work correctly.

Signed-off-by: David Jander <david@...tonic.nl>
---
 drivers/gpio/gpio-pca953x.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 30072a570bc2..48fea4c68e8d 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -606,8 +606,7 @@ static void pca953x_irq_bus_sync_unlock(struct irq_data *d)
 	u8 invert_irq_mask[MAX_BANK];
 	u8 reg_direction[MAX_BANK];
 
-	regmap_bulk_read(chip->regmap, chip->regs->direction, reg_direction,
-			 NBANK(chip));
+	pca953x_read_regs(chip, chip->regs->direction, reg_direction);
 
 	if (chip->driver_data & PCA_PCAL) {
 		/* Enable latch on interrupt-enabled inputs */
@@ -710,8 +709,7 @@ static bool pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending)
 		return false;
 
 	/* Remove output pins from the equation */
-	regmap_bulk_read(chip->regmap, chip->regs->direction, reg_direction,
-			 NBANK(chip));
+	pca953x_read_regs(chip, chip->regs->direction, reg_direction);
 	for (i = 0; i < NBANK(chip); i++)
 		cur_stat[i] &= reg_direction[i];
 
@@ -789,8 +787,7 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
 	 * interrupt.  We have to rely on the previous read for
 	 * this purpose.
 	 */
-	regmap_bulk_read(chip->regmap, chip->regs->direction, reg_direction,
-			 NBANK(chip));
+	pca953x_read_regs(chip, chip->regs->direction, reg_direction);
 	for (i = 0; i < NBANK(chip); i++)
 		chip->irq_stat[i] &= reg_direction[i];
 	mutex_init(&chip->irq_lock);
-- 
2.19.1