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gpio: pca953x: use the correct range when do regmap sync

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[ Upstream commit 2abc17a93867dc816f0ed9d32021dda8078e7330 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Haibo Chen 2022-07-18 16:31:42 +08:00 committed by Greg Kroah-Hartman
parent 9726ed46b9
commit dfb4b67ff4
1 changed files with 6 additions and 6 deletions
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12
drivers/gpio/gpio-pca953x.c
View File

@ -900,12 +900,12 @@ 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;
@ -1118,14 +1118,14 @@ 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;
@ -1135,7 +1135,7 @@ 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);
@ -1144,7 +1144,7 @@ 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);