| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20190918150518.vqphd2rsopesbi7q@pengutronix.de>
Date: Wed, 18 Sep 2019 17:05:18 +0200
From: Marco Felsch <m.felsch@...gutronix.de>
To: Adam Thomson <Adam.Thomson.Opensource@...semi.com>
Cc: Support Opensource <Support.Opensource@...semi.com>,
"lee.jones@...aro.org" <lee.jones@...aro.org>,
"robh+dt@...nel.org" <robh+dt@...nel.org>,
"lgirdwood@...il.com" <lgirdwood@...il.com>,
"broonie@...nel.org" <broonie@...nel.org>,
"kernel@...gutronix.de" <kernel@...gutronix.de>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/5] regulator: da9062: fix suspend_enable/disable
preparation
Hi Adam,
On 19-09-18 12:41, Adam Thomson wrote:
> On 17 September 2019 13:43, Marco Felsch wrote:
>
> > Currently the suspend reg_field maps to the pmic voltage selection bits
> > and is used during suspend_enabe/disable() and during get_mode(). This
> > seems to be wrong for both use cases.
>
> Hi Marco,
>
> I'd be very surprised if what was in place was wrong as I know Stephen tested
> this driver thoroughly over its lifetime. Regardless, I'll need some time to review
> your proposed updates to make sure this aligns with our expectation of operation.
Thanks for the upcoming review.
Regards,
Marco
> >
> > Use case one (suspend_enabe/disable):
> > Those callbacks are used to mark a regulator device as enabled/disabled
> > during suspend. Marking the regulator enabled during suspend is done by
> > the LDOx_CONF/BUCKx_CONF bit within the LDOx_CONT/BUCKx_CONT
> > registers.
> > Setting this bit tells the DA9062 PMIC state machine to keep the
> > regulator on in POWERDOWN mode and switch to suspend voltage.
> >
> > Use case two (get_mode):
> > The get_mode callback is used to retrieve the active mode state. Since
> > the regulator-setting-A is used for the active state and
> > regulator-setting-B for the suspend state there is no need to check
> > which regulator setting is active.
> >
> > Fixes: 4068e5182ada ("regulator: da9062: DA9062 regulator driver")
> > Signed-off-by: Marco Felsch <m.felsch@...gutronix.de>
> > ---
> > drivers/regulator/da9062-regulator.c | 118 +++++++++++----------------
> > 1 file changed, 47 insertions(+), 71 deletions(-)
> >
> > diff --git a/drivers/regulator/da9062-regulator.c b/drivers/regulator/da9062-
> > regulator.c
> > index 2ffc64622451..9b2ca472f70c 100644
> > --- a/drivers/regulator/da9062-regulator.c
> > +++ b/drivers/regulator/da9062-regulator.c
> > @@ -136,7 +136,6 @@ static int da9062_buck_set_mode(struct regulator_dev
> > *rdev, unsigned mode)
> > static unsigned da9062_buck_get_mode(struct regulator_dev *rdev)
> > {
> > struct da9062_regulator *regl = rdev_get_drvdata(rdev);
> > - struct regmap_field *field;
> > unsigned int val, mode = 0;
> > int ret;
> >
> > @@ -158,18 +157,7 @@ static unsigned da9062_buck_get_mode(struct
> > regulator_dev *rdev)
> > return REGULATOR_MODE_NORMAL;
> > }
> >
> > - /* Detect current regulator state */
> > - ret = regmap_field_read(regl->suspend, &val);
> > - if (ret < 0)
> > - return 0;
> > -
> > - /* Read regulator mode from proper register, depending on state */
> > - if (val)
> > - field = regl->suspend_sleep;
> > - else
> > - field = regl->sleep;
> > -
> > - ret = regmap_field_read(field, &val);
> > + ret = regmap_field_read(regl->sleep, &val);
> > if (ret < 0)
> > return 0;
> >
> > @@ -208,21 +196,9 @@ static int da9062_ldo_set_mode(struct regulator_dev
> > *rdev, unsigned mode)
> > static unsigned da9062_ldo_get_mode(struct regulator_dev *rdev)
> > {
> > struct da9062_regulator *regl = rdev_get_drvdata(rdev);
> > - struct regmap_field *field;
> > int ret, val;
> >
> > - /* Detect current regulator state */
> > - ret = regmap_field_read(regl->suspend, &val);
> > - if (ret < 0)
> > - return 0;
> > -
> > - /* Read regulator mode from proper register, depending on state */
> > - if (val)
> > - field = regl->suspend_sleep;
> > - else
> > - field = regl->sleep;
> > -
> > - ret = regmap_field_read(field, &val);
> > + ret = regmap_field_read(regl->sleep, &val);
> > if (ret < 0)
> > return 0;
> >
> > @@ -408,10 +384,10 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_BUCK1_MODE_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz((DA9062AA_BUCK1_MODE_MASK)) - 1),
> > - .suspend = REG_FIELD(DA9062AA_DVC_1,
> > - __builtin_ffs((int)DA9062AA_VBUCK1_SEL_MASK) - 1,
> > + .suspend = REG_FIELD(DA9062AA_BUCK1_CONT,
> > + __builtin_ffs((int)DA9062AA_BUCK1_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > - __builtin_clz((DA9062AA_VBUCK1_SEL_MASK)) - 1),
> > + __builtin_clz(DA9062AA_BUCK1_CONF_MASK) - 1),
> > },
> > {
> > .desc.id = DA9061_ID_BUCK2,
> > @@ -444,10 +420,10 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_BUCK3_MODE_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz((DA9062AA_BUCK3_MODE_MASK)) - 1),
> > - .suspend = REG_FIELD(DA9062AA_DVC_1,
> > - __builtin_ffs((int)DA9062AA_VBUCK3_SEL_MASK) - 1,
> > + .suspend = REG_FIELD(DA9062AA_BUCK3_CONT,
> > + __builtin_ffs((int)DA9062AA_BUCK3_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > - __builtin_clz((DA9062AA_VBUCK3_SEL_MASK)) - 1),
> > + __builtin_clz(DA9062AA_BUCK3_CONF_MASK) - 1),
> > },
> > {
> > .desc.id = DA9061_ID_BUCK3,
> > @@ -480,10 +456,10 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_BUCK4_MODE_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz((DA9062AA_BUCK4_MODE_MASK)) - 1),
> > - .suspend = REG_FIELD(DA9062AA_DVC_1,
> > - __builtin_ffs((int)DA9062AA_VBUCK4_SEL_MASK) - 1,
> > + .suspend = REG_FIELD(DA9062AA_BUCK4_CONT,
> > + __builtin_ffs((int)DA9062AA_BUCK4_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > - __builtin_clz((DA9062AA_VBUCK4_SEL_MASK)) - 1),
> > + __builtin_clz(DA9062AA_BUCK4_CONF_MASK) - 1),
> > },
> > {
> > .desc.id = DA9061_ID_LDO1,
> > @@ -509,10 +485,10 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > sizeof(unsigned int) * 8 -
> > __builtin_clz((DA9062AA_LDO1_SL_B_MASK)) - 1),
> > .suspend_vsel_reg = DA9062AA_VLDO1_B,
> > - .suspend = REG_FIELD(DA9062AA_DVC_1,
> > - __builtin_ffs((int)DA9062AA_VLDO1_SEL_MASK) - 1,
> > + .suspend = REG_FIELD(DA9062AA_LDO1_CONT,
> > + __builtin_ffs((int)DA9062AA_LDO1_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > - __builtin_clz((DA9062AA_VLDO1_SEL_MASK)) - 1),
> > + __builtin_clz(DA9062AA_LDO1_CONF_MASK) - 1),
> > .oc_event = REG_FIELD(DA9062AA_STATUS_D,
> > __builtin_ffs((int)DA9062AA_LDO1_ILIM_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > @@ -542,10 +518,10 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > sizeof(unsigned int) * 8 -
> > __builtin_clz((DA9062AA_LDO2_SL_B_MASK)) - 1),
> > .suspend_vsel_reg = DA9062AA_VLDO2_B,
> > - .suspend = REG_FIELD(DA9062AA_DVC_1,
> > - __builtin_ffs((int)DA9062AA_VLDO2_SEL_MASK) - 1,
> > + .suspend = REG_FIELD(DA9062AA_LDO2_CONT,
> > + __builtin_ffs((int)DA9062AA_LDO2_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > - __builtin_clz((DA9062AA_VLDO2_SEL_MASK)) - 1),
> > + __builtin_clz(DA9062AA_LDO2_CONF_MASK) - 1),
> > .oc_event = REG_FIELD(DA9062AA_STATUS_D,
> > __builtin_ffs((int)DA9062AA_LDO2_ILIM_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > @@ -575,10 +551,10 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > sizeof(unsigned int) * 8 -
> > __builtin_clz((DA9062AA_LDO3_SL_B_MASK)) - 1),
> > .suspend_vsel_reg = DA9062AA_VLDO3_B,
> > - .suspend = REG_FIELD(DA9062AA_DVC_1,
> > - __builtin_ffs((int)DA9062AA_VLDO3_SEL_MASK) - 1,
> > + .suspend = REG_FIELD(DA9062AA_LDO3_CONT,
> > + __builtin_ffs((int)DA9062AA_LDO3_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > - __builtin_clz((DA9062AA_VLDO3_SEL_MASK)) - 1),
> > + __builtin_clz(DA9062AA_LDO3_CONF_MASK) - 1),
> > .oc_event = REG_FIELD(DA9062AA_STATUS_D,
> > __builtin_ffs((int)DA9062AA_LDO3_ILIM_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > @@ -608,10 +584,10 @@ static const struct da9062_regulator_info
> > local_da9061_regulator_info[] = {
> > sizeof(unsigned int) * 8 -
> > __builtin_clz((DA9062AA_LDO4_SL_B_MASK)) - 1),
> > .suspend_vsel_reg = DA9062AA_VLDO4_B,
> > - .suspend = REG_FIELD(DA9062AA_DVC_1,
> > - __builtin_ffs((int)DA9062AA_VLDO4_SEL_MASK) - 1,
> > + .suspend = REG_FIELD(DA9062AA_LDO4_CONT,
> > + __builtin_ffs((int)DA9062AA_LDO4_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > - __builtin_clz((DA9062AA_VLDO4_SEL_MASK)) - 1),
> > + __builtin_clz(DA9062AA_LDO4_CONF_MASK) - 1),
> > .oc_event = REG_FIELD(DA9062AA_STATUS_D,
> > __builtin_ffs((int)DA9062AA_LDO4_ILIM_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > @@ -652,10 +628,10 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_BUCK1_MODE_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz((DA9062AA_BUCK1_MODE_MASK)) - 1),
> > - .suspend = REG_FIELD(DA9062AA_DVC_1,
> > - __builtin_ffs((int)DA9062AA_VBUCK1_SEL_MASK) - 1,
> > + .suspend = REG_FIELD(DA9062AA_BUCK1_CONT,
> > + __builtin_ffs((int)DA9062AA_BUCK1_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > - __builtin_clz((DA9062AA_VBUCK1_SEL_MASK)) - 1),
> > + __builtin_clz(DA9062AA_BUCK1_CONF_MASK) - 1),
> > },
> > {
> > .desc.id = DA9062_ID_BUCK2,
> > @@ -688,10 +664,10 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_BUCK2_MODE_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz((DA9062AA_BUCK2_MODE_MASK)) - 1),
> > - .suspend = REG_FIELD(DA9062AA_DVC_1,
> > - __builtin_ffs((int)DA9062AA_VBUCK2_SEL_MASK) - 1,
> > + .suspend = REG_FIELD(DA9062AA_BUCK2_CONT,
> > + __builtin_ffs((int)DA9062AA_BUCK2_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > - __builtin_clz((DA9062AA_VBUCK2_SEL_MASK)) - 1),
> > + __builtin_clz(DA9062AA_BUCK2_CONF_MASK) - 1),
> > },
> > {
> > .desc.id = DA9062_ID_BUCK3,
> > @@ -724,10 +700,10 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_BUCK3_MODE_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz((DA9062AA_BUCK3_MODE_MASK)) - 1),
> > - .suspend = REG_FIELD(DA9062AA_DVC_1,
> > - __builtin_ffs((int)DA9062AA_VBUCK3_SEL_MASK) - 1,
> > + .suspend = REG_FIELD(DA9062AA_BUCK3_CONT,
> > + __builtin_ffs((int)DA9062AA_BUCK3_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > - __builtin_clz((DA9062AA_VBUCK3_SEL_MASK)) - 1),
> > + __builtin_clz(DA9062AA_BUCK3_CONF_MASK) - 1),
> > },
> > {
> > .desc.id = DA9062_ID_BUCK4,
> > @@ -760,10 +736,10 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > __builtin_ffs((int)DA9062AA_BUCK4_MODE_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > __builtin_clz((DA9062AA_BUCK4_MODE_MASK)) - 1),
> > - .suspend = REG_FIELD(DA9062AA_DVC_1,
> > - __builtin_ffs((int)DA9062AA_VBUCK4_SEL_MASK) - 1,
> > + .suspend = REG_FIELD(DA9062AA_BUCK4_CONT,
> > + __builtin_ffs((int)DA9062AA_BUCK4_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > - __builtin_clz((DA9062AA_VBUCK4_SEL_MASK)) - 1),
> > + __builtin_clz(DA9062AA_BUCK4_CONF_MASK) - 1),
> > },
> > {
> > .desc.id = DA9062_ID_LDO1,
> > @@ -789,10 +765,10 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > sizeof(unsigned int) * 8 -
> > __builtin_clz((DA9062AA_LDO1_SL_B_MASK)) - 1),
> > .suspend_vsel_reg = DA9062AA_VLDO1_B,
> > - .suspend = REG_FIELD(DA9062AA_DVC_1,
> > - __builtin_ffs((int)DA9062AA_VLDO1_SEL_MASK) - 1,
> > + .suspend = REG_FIELD(DA9062AA_LDO1_CONT,
> > + __builtin_ffs((int)DA9062AA_LDO1_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > - __builtin_clz((DA9062AA_VLDO1_SEL_MASK)) - 1),
> > + __builtin_clz(DA9062AA_LDO1_CONF_MASK) - 1),
> > .oc_event = REG_FIELD(DA9062AA_STATUS_D,
> > __builtin_ffs((int)DA9062AA_LDO1_ILIM_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > @@ -822,10 +798,10 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > sizeof(unsigned int) * 8 -
> > __builtin_clz((DA9062AA_LDO2_SL_B_MASK)) - 1),
> > .suspend_vsel_reg = DA9062AA_VLDO2_B,
> > - .suspend = REG_FIELD(DA9062AA_DVC_1,
> > - __builtin_ffs((int)DA9062AA_VLDO2_SEL_MASK) - 1,
> > + .suspend = REG_FIELD(DA9062AA_LDO2_CONT,
> > + __builtin_ffs((int)DA9062AA_LDO2_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > - __builtin_clz((DA9062AA_VLDO2_SEL_MASK)) - 1),
> > + __builtin_clz(DA9062AA_LDO2_CONF_MASK) - 1),
> > .oc_event = REG_FIELD(DA9062AA_STATUS_D,
> > __builtin_ffs((int)DA9062AA_LDO2_ILIM_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > @@ -855,10 +831,10 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > sizeof(unsigned int) * 8 -
> > __builtin_clz((DA9062AA_LDO3_SL_B_MASK)) - 1),
> > .suspend_vsel_reg = DA9062AA_VLDO3_B,
> > - .suspend = REG_FIELD(DA9062AA_DVC_1,
> > - __builtin_ffs((int)DA9062AA_VLDO3_SEL_MASK) - 1,
> > + .suspend = REG_FIELD(DA9062AA_LDO3_CONT,
> > + __builtin_ffs((int)DA9062AA_LDO3_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > - __builtin_clz((DA9062AA_VLDO3_SEL_MASK)) - 1),
> > + __builtin_clz(DA9062AA_LDO3_CONF_MASK) - 1),
> > .oc_event = REG_FIELD(DA9062AA_STATUS_D,
> > __builtin_ffs((int)DA9062AA_LDO3_ILIM_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > @@ -888,10 +864,10 @@ static const struct da9062_regulator_info
> > local_da9062_regulator_info[] = {
> > sizeof(unsigned int) * 8 -
> > __builtin_clz((DA9062AA_LDO4_SL_B_MASK)) - 1),
> > .suspend_vsel_reg = DA9062AA_VLDO4_B,
> > - .suspend = REG_FIELD(DA9062AA_DVC_1,
> > - __builtin_ffs((int)DA9062AA_VLDO4_SEL_MASK) - 1,
> > + .suspend = REG_FIELD(DA9062AA_LDO4_CONT,
> > + __builtin_ffs((int)DA9062AA_LDO4_CONF_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > - __builtin_clz((DA9062AA_VLDO4_SEL_MASK)) - 1),
> > + __builtin_clz(DA9062AA_LDO4_CONF_MASK) - 1),
> > .oc_event = REG_FIELD(DA9062AA_STATUS_D,
> > __builtin_ffs((int)DA9062AA_LDO4_ILIM_MASK) - 1,
> > sizeof(unsigned int) * 8 -
> > --
> > 2.20.1
>
>
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
Powered by blists - more mailing lists