| 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
| ||
|
Date: Mon, 23 Sep 2019 16:03:39 +0000
From: Adam Thomson <Adam.Thomson.Opensource@...semi.com>
To: Marco Felsch <m.felsch@...gutronix.de>,
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>,
Steve Twiss <stwiss.opensource@...semi.com>
CC: "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
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.
>
> 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.
>
So I believe you're correct with the above statements. The driver, rather than
enabling/disabling a regulator in system suspend, will instead put the regulator
to a low power state, which is definitely not the desired outcome. Thanks for
rectifying this.
Reviewed-by: Adam Thomson <Adam.Thomson.Opensource@...semi.com>
> 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
Powered by blists - more mailing lists