From 43624eda86c98b0de726d0b6f2516ccc3ef7313f Mon Sep 17 00:00:00 2001
From: Haibo Chen <haibo.chen@nxp.com>
Date: Mon, 30 May 2022 18:48:48 +0800
Subject: [PATCH] gpio: pca953x: use the correct register address to do regcache sync
Git-commit: 43624eda86c98b0de726d0b6f2516ccc3ef7313f
Patch-mainline: v5.19-rc1
References: git-fixes

For regcache_sync_region, need to use pca953x_recalc_addr() to get
the real register address.

Fixes: b76574300504 ("gpio: pca953x: Restore registers after suspend/resume cycle")
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpio/gpio-pca953x.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 8726921a1129..33683295a0bf 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -1108,20 +1108,21 @@ static int pca953x_regcache_sync(struct device *dev)
 {
 	struct pca953x_chip *chip = dev_get_drvdata(dev);
 	int ret;
+	u8 regaddr;
 
 	/*
 	 * The ordering between direction and output is important,
 	 * sync these registers first and only then sync the rest.
 	 */
-	ret = regcache_sync_region(chip->regmap, chip->regs->direction,
-				   chip->regs->direction + NBANK(chip));
+	regaddr = pca953x_recalc_addr(chip, chip->regs->direction, 0);
+	ret = regcache_sync_region(chip->regmap, regaddr, regaddr + NBANK(chip));
 	if (ret) {
 		dev_err(dev, "Failed to sync GPIO dir registers: %d\n", ret);
 		return ret;
 	}
 
-	ret = regcache_sync_region(chip->regmap, chip->regs->output,
-				   chip->regs->output + NBANK(chip));
+	regaddr = pca953x_recalc_addr(chip, chip->regs->output, 0);
+	ret = regcache_sync_region(chip->regmap, regaddr, regaddr + NBANK(chip));
 	if (ret) {
 		dev_err(dev, "Failed to sync GPIO out registers: %d\n", ret);
 		return ret;
@@ -1129,16 +1130,18 @@ static int pca953x_regcache_sync(struct device *dev)
 
 #ifdef CONFIG_GPIO_PCA953X_IRQ
 	if (chip->driver_data & PCA_PCAL) {
-		ret = regcache_sync_region(chip->regmap, PCAL953X_IN_LATCH,
-					   PCAL953X_IN_LATCH + NBANK(chip));
+		regaddr = pca953x_recalc_addr(chip, PCAL953X_IN_LATCH, 0);
+		ret = regcache_sync_region(chip->regmap, regaddr,
+					   regaddr + NBANK(chip));
 		if (ret) {
 			dev_err(dev, "Failed to sync INT latch registers: %d\n",
 				ret);
 			return ret;
 		}
 
-		ret = regcache_sync_region(chip->regmap, PCAL953X_INT_MASK,
-					   PCAL953X_INT_MASK + NBANK(chip));
+		regaddr = pca953x_recalc_addr(chip, PCAL953X_INT_MASK, 0);
+		ret = regcache_sync_region(chip->regmap, regaddr,
+					   regaddr + NBANK(chip));
 		if (ret) {
 			dev_err(dev, "Failed to sync INT mask registers: %d\n",
 				ret);
-- 
2.35.3