This is a note to let you know that I've just added the patch titled regulator: bd718x7, bd71828, Fix dvs voltage levels to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: regulator-bd718x7-bd71828-fix-dvs-voltage-levels.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 9375af449c9f8aab3a2f05efd53d9118e42ae619 Author: Matti Vaittinen <matti.vaittinen@xxxxxxxxxxxxxxxxx> Date: Fri Feb 12 10:00:23 2021 +0200 regulator: bd718x7, bd71828, Fix dvs voltage levels [ Upstream commit c294554111a835598b557db789d9ad2379b512a2 ] The ROHM BD718x7 and BD71828 drivers support setting HW state specific voltages from device-tree. This is used also by various in-tree DTS files. These drivers do incorrectly try to compose bit-map using enum values. By a chance this works for first two valid levels having values 1 and 2 - but setting values for the rest of the levels do indicate capability of setting values for first levels as well. Luckily the regulators which support setting values for SUSPEND/LPSR do usually also support setting values for RUN and IDLE too - thus this has not been such a fatal issue. Fix this by defining the old enum values as bits and fixing the parsing code. This allows keeping existing IC specific drivers intact and only slightly changing the rohm-regulator.c Fixes: 21b72156ede8b ("regulator: bd718x7: Split driver to common and bd718x7 specific parts") Signed-off-by: Matti Vaittinen <matti.vaittinen@xxxxxxxxxxxxxxxxx> Acked-by: Lee Jones <lee.jones@xxxxxxxxxx> Link: https://lore.kernel.org/r/20210212080023.GA880728@localhost.localdomain Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/regulator/rohm-regulator.c b/drivers/regulator/rohm-regulator.c index 399002383b28b..5c558b153d55e 100644 --- a/drivers/regulator/rohm-regulator.c +++ b/drivers/regulator/rohm-regulator.c @@ -52,9 +52,12 @@ int rohm_regulator_set_dvs_levels(const struct rohm_dvs_config *dvs, char *prop; unsigned int reg, mask, omask, oreg = desc->enable_reg; - for (i = 0; i < ROHM_DVS_LEVEL_MAX && !ret; i++) { - if (dvs->level_map & (1 << i)) { - switch (i + 1) { + for (i = 0; i < ROHM_DVS_LEVEL_VALID_AMOUNT && !ret; i++) { + int bit; + + bit = BIT(i); + if (dvs->level_map & bit) { + switch (bit) { case ROHM_DVS_LEVEL_RUN: prop = "rohm,dvs-run-voltage"; reg = dvs->run_reg; diff --git a/include/linux/mfd/rohm-generic.h b/include/linux/mfd/rohm-generic.h index 4283b5b33e040..2b85b9deb03ae 100644 --- a/include/linux/mfd/rohm-generic.h +++ b/include/linux/mfd/rohm-generic.h @@ -20,14 +20,12 @@ struct rohm_regmap_dev { struct regmap *regmap; }; -enum { - ROHM_DVS_LEVEL_UNKNOWN, - ROHM_DVS_LEVEL_RUN, - ROHM_DVS_LEVEL_IDLE, - ROHM_DVS_LEVEL_SUSPEND, - ROHM_DVS_LEVEL_LPSR, - ROHM_DVS_LEVEL_MAX = ROHM_DVS_LEVEL_LPSR, -}; +#define ROHM_DVS_LEVEL_RUN BIT(0) +#define ROHM_DVS_LEVEL_IDLE BIT(1) +#define ROHM_DVS_LEVEL_SUSPEND BIT(2) +#define ROHM_DVS_LEVEL_LPSR BIT(3) +#define ROHM_DVS_LEVEL_VALID_AMOUNT 4 +#define ROHM_DVS_LEVEL_UNKNOWN 0 /** * struct rohm_dvs_config - dynamic voltage scaling register descriptions