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authorHaibo Chen <haibo.chen@nxp.com>2022-07-18 11:31:42 +0300
committerBartosz Golaszewski <brgl@bgdev.pl>2022-07-19 12:19:16 +0300
commit2abc17a93867dc816f0ed9d32021dda8078e7330 (patch)
tree612b4e4f94c4bff67e4ad1b23326c8d3a1d491a0 /drivers
parentdb8edaa09d7461ec08672a92a2eef63d5882bb79 (diff)
downloadlinux-2abc17a93867dc816f0ed9d32021dda8078e7330.tar.xz
gpio: pca953x: use the correct range when do regmap sync
regmap will sync a range of registers, here use the correct range to make sure the sync do not touch other unexpected registers. Find on pca9557pw on imx8qxp/dxl evk board, this device support 8 pin, so only need one register(8 bits) to cover all the 8 pins's property setting. But when sync the output, we find it actually update two registers, output register and the following register. Fixes: b76574300504 ("gpio: pca953x: Restore registers after suspend/resume cycle") Fixes: ec82d1eba346 ("gpio: pca953x: Zap ad-hoc reg_output cache") Fixes: 0f25fda840a9 ("gpio: pca953x: Zap ad-hoc reg_direction cache") Signed-off-by: Haibo Chen <haibo.chen@nxp.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpio/gpio-pca953x.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 7209f69a8e8d..18888ec24d04 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -912,12 +912,12 @@ static int device_pca95xx_init(struct pca953x_chip *chip, u32 invert)
int ret;
ret = regcache_sync_region(chip->regmap, chip->regs->output,
- chip->regs->output + NBANK(chip));
+ chip->regs->output + NBANK(chip) - 1);
if (ret)
goto out;
ret = regcache_sync_region(chip->regmap, chip->regs->direction,
- chip->regs->direction + NBANK(chip));
+ chip->regs->direction + NBANK(chip) - 1);
if (ret)
goto out;
@@ -1130,14 +1130,14 @@ static int pca953x_regcache_sync(struct device *dev)
* sync these registers first and only then sync the rest.
*/
regaddr = pca953x_recalc_addr(chip, chip->regs->direction, 0);
- ret = regcache_sync_region(chip->regmap, regaddr, regaddr + NBANK(chip));
+ ret = regcache_sync_region(chip->regmap, regaddr, regaddr + NBANK(chip) - 1);
if (ret) {
dev_err(dev, "Failed to sync GPIO dir registers: %d\n", ret);
return ret;
}
regaddr = pca953x_recalc_addr(chip, chip->regs->output, 0);
- ret = regcache_sync_region(chip->regmap, regaddr, regaddr + NBANK(chip));
+ ret = regcache_sync_region(chip->regmap, regaddr, regaddr + NBANK(chip) - 1);
if (ret) {
dev_err(dev, "Failed to sync GPIO out registers: %d\n", ret);
return ret;
@@ -1147,7 +1147,7 @@ static int pca953x_regcache_sync(struct device *dev)
if (chip->driver_data & PCA_PCAL) {
regaddr = pca953x_recalc_addr(chip, PCAL953X_IN_LATCH, 0);
ret = regcache_sync_region(chip->regmap, regaddr,
- regaddr + NBANK(chip));
+ regaddr + NBANK(chip) - 1);
if (ret) {
dev_err(dev, "Failed to sync INT latch registers: %d\n",
ret);
@@ -1156,7 +1156,7 @@ static int pca953x_regcache_sync(struct device *dev)
regaddr = pca953x_recalc_addr(chip, PCAL953X_INT_MASK, 0);
ret = regcache_sync_region(chip->regmap, regaddr,
- regaddr + NBANK(chip));
+ regaddr + NBANK(chip) - 1);
if (ret) {
dev_err(dev, "Failed to sync INT mask registers: %d\n",
ret);