Messages in this thread Patch in this message | | | From | Steve Twiss <> | Date | Wed, 10 Feb 2016 17:35:07 +0000 | Subject | [PATCH V1] mfd: da9063: fix missing volatile registers in the core regmap_range volatile lists |
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From: Steve Twiss <stwiss.opensource@diasemi.com>
Add an updated set of registers listed in the core regmap_range volatile ranges defined for the DA9063.
These new registers contain bits that cannot be considered under the full control of software. Under various conditions the hardware will set and/or automatically clear bit(s) contained in these registers.
When using a cached version of regmap, the volatility of these registers must be identified otherwise the regmap operations may not ensure the registers are explicitly altered.
As well as updating the list of volatile registers, this change will fix a corner case discovered in the DA9063 ONKEY which is used by the DA9063 core.
In the ONKEY case, the CONTROL_B register is now listed as volatile in the regmap_range because it contains the bit field NONKEY_LOCK. This bit can be altered by hardware, in which case regmap must be notified of its ability to be manpiulated outside of software control.
Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com>
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Hi Lee,
This patch applies against linux-next and v4.5-rc1
It is quite similar to a previous patch you recently applied - https://lkml.org/lkml/2016/2/1/485
But this is for the DA9063 not DA9062
Regards, Steve
drivers/mfd/da9063-i2c.c | 36 ++++++++++++++++++++++++++++++------ 1 file changed, 30 insertions(+), 6 deletions(-)
diff --git a/drivers/mfd/da9063-i2c.c b/drivers/mfd/da9063-i2c.c index 2d4e3e0..7390108 100644 --- a/drivers/mfd/da9063-i2c.c +++ b/drivers/mfd/da9063-i2c.c @@ -74,18 +74,30 @@ static const struct regmap_range da9063_ad_writeable_ranges[] = { static const struct regmap_range da9063_ad_volatile_ranges[] = { { - .range_min = DA9063_REG_STATUS_A, + .range_min = DA9063_REG_PAGE_CON, .range_max = DA9063_REG_EVENT_D, }, { - .range_min = DA9063_REG_CONTROL_F, + .range_min = DA9063_REG_CONTROL_A, + .range_max = DA9063_REG_CONTROL_B, + }, { + .range_min = DA9063_REG_CONTROL_E, .range_max = DA9063_REG_CONTROL_F, }, { - .range_min = DA9063_REG_ADC_MAN, + .range_min = DA9063_REG_BCORE2_CONT, + .range_max = DA9063_REG_LDO11_CONT, + }, { + .range_min = DA9063_REG_DVC_1, .range_max = DA9063_REG_ADC_MAN, }, { .range_min = DA9063_REG_ADC_RES_L, .range_max = DA9063_AD_REG_SECOND_D, }, { + .range_min = DA9063_REG_SEQ, + .range_max = DA9063_REG_SEQ, + }, { + .range_min = DA9063_REG_EN_32K, + .range_max = DA9063_REG_EN_32K, + }, { .range_min = DA9063_AD_REG_MON_REG_5, .range_max = DA9063_AD_REG_MON_REG_6, }, @@ -152,18 +164,30 @@ static const struct regmap_range da9063_bb_writeable_ranges[] = { static const struct regmap_range da9063_bb_volatile_ranges[] = { { - .range_min = DA9063_REG_STATUS_A, + .range_min = DA9063_REG_PAGE_CON, .range_max = DA9063_REG_EVENT_D, }, { - .range_min = DA9063_REG_CONTROL_F, + .range_min = DA9063_REG_CONTROL_A, + .range_max = DA9063_REG_CONTROL_B, + }, { + .range_min = DA9063_REG_CONTROL_E, .range_max = DA9063_REG_CONTROL_F, }, { - .range_min = DA9063_REG_ADC_MAN, + .range_min = DA9063_REG_BCORE2_CONT, + .range_max = DA9063_REG_LDO11_CONT, + }, { + .range_min = DA9063_REG_DVC_1, .range_max = DA9063_REG_ADC_MAN, }, { .range_min = DA9063_REG_ADC_RES_L, .range_max = DA9063_BB_REG_SECOND_D, }, { + .range_min = DA9063_REG_SEQ, + .range_max = DA9063_REG_SEQ, + }, { + .range_min = DA9063_REG_EN_32K, + .range_max = DA9063_REG_EN_32K, + }, { .range_min = DA9063_BB_REG_MON_REG_5, .range_max = DA9063_BB_REG_MON_REG_6, }, -- end-of-patch for PATCH V1
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