[PATCH 5.19 048/717] regulator: qcom_rpm: Fix circular deferral regression

Greg Kroah-Hartman
2022-10-22T07:39:25Z

From: Linus Walleij <linus.walleij@linaro.org>

commit 8478ed5844588703a1a4c96a004b1525fbdbdd5e upstream.

On recent kernels, the PM8058 L16 (or any other PM8058 LDO-regulator)
does not come up if they are supplied by an SMPS-regulator. This
is not very strange since the regulators are registered in a long
array and the L-regulators are registered before the S-regulators,
and if an L-regulator defers, it will never get around to registering
the S-regulator that it needs.

See arch/arm/boot/dts/qcom-apq8060-dragonboard.dts:

pm8058-regulators {
(...)
vdd_l13_l16-supply = <&pm8058_s4>;
(...)

Ooops.

Fix this by moving the PM8058 S-regulators first in the array.

Do the same for the PM8901 S-regulators (though this is currently
not causing any problems with out device trees) so that the pattern
of registration order is the same on all PMnnnn chips.

Fixes: 087a1b5cdd55 ("regulator: qcom: Rework to single platform device")
Cc: stable@vger.kernel.org
Cc: Andy Gross <agross@kernel.org>
Cc: Bjorn Andersson <andersson@kernel.org>
Cc: Konrad Dybcio <konrad.dybcio@somainline.org>
Cc: linux-arm-msm@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220909112529.239143-1-linus.walleij@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/regulator/qcom_rpm-regulator.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)

--- a/drivers/regulator/qcom_rpm-regulator.c
+++ b/drivers/regulator/qcom_rpm-regulator.c
@@ -802,6 +802,12 @@ static const struct rpm_regulator_data r
};

static const struct rpm_regulator_data rpm_pm8058_regulators[] = {
+ { "s0", QCOM_RPM_PM8058_SMPS0, &pm8058_smps, "vdd_s0" },
+ { "s1", QCOM_RPM_PM8058_SMPS1, &pm8058_smps, "vdd_s1" },
+ { "s2", QCOM_RPM_PM8058_SMPS2, &pm8058_smps, "vdd_s2" },
+ { "s3", QCOM_RPM_PM8058_SMPS3, &pm8058_smps, "vdd_s3" },
+ { "s4", QCOM_RPM_PM8058_SMPS4, &pm8058_smps, "vdd_s4" },
+
{ "l0", QCOM_RPM_PM8058_LDO0, &pm8058_nldo, "vdd_l0_l1_lvs" },
{ "l1", QCOM_RPM_PM8058_LDO1, &pm8058_nldo, "vdd_l0_l1_lvs" },
{ "l2", QCOM_RPM_PM8058_LDO2, &pm8058_pldo, "vdd_l2_l11_l12" },
@@ -829,12 +835,6 @@ static const struct rpm_regulator_data r
{ "l24", QCOM_RPM_PM8058_LDO24, &pm8058_nldo, "vdd_l23_l24_l25" },
{ "l25", QCOM_RPM_PM8058_LDO25, &pm8058_nldo, "vdd_l23_l24_l25" },

- { "s0", QCOM_RPM_PM8058_SMPS0, &pm8058_smps, "vdd_s0" },
- { "s1", QCOM_RPM_PM8058_SMPS1, &pm8058_smps, "vdd_s1" },
- { "s2", QCOM_RPM_PM8058_SMPS2, &pm8058_smps, "vdd_s2" },
- { "s3", QCOM_RPM_PM8058_SMPS3, &pm8058_smps, "vdd_s3" },
- { "s4", QCOM_RPM_PM8058_SMPS4, &pm8058_smps, "vdd_s4" },
-
{ "lvs0", QCOM_RPM_PM8058_LVS0, &pm8058_switch, "vdd_l0_l1_lvs" },
{ "lvs1", QCOM_RPM_PM8058_LVS1, &pm8058_switch, "vdd_l0_l1_lvs" },

@@ -843,6 +843,12 @@ static const struct rpm_regulator_data r
};

static const struct rpm_regulator_data rpm_pm8901_regulators[] = {
+ { "s0", QCOM_RPM_PM8901_SMPS0, &pm8901_ftsmps, "vdd_s0" },
+ { "s1", QCOM_RPM_PM8901_SMPS1, &pm8901_ftsmps, "vdd_s1" },
+ { "s2", QCOM_RPM_PM8901_SMPS2, &pm8901_ftsmps, "vdd_s2" },
+ { "s3", QCOM_RPM_PM8901_SMPS3, &pm8901_ftsmps, "vdd_s3" },
+ { "s4", QCOM_RPM_PM8901_SMPS4, &pm8901_ftsmps, "vdd_s4" },
+
{ "l0", QCOM_RPM_PM8901_LDO0, &pm8901_nldo, "vdd_l0" },
{ "l1", QCOM_RPM_PM8901_LDO1, &pm8901_pldo, "vdd_l1" },
{ "l2", QCOM_RPM_PM8901_LDO2, &pm8901_pldo, "vdd_l2" },
@@ -851,12 +857,6 @@ static const struct rpm_regulator_data r
{ "l5", QCOM_RPM_PM8901_LDO5, &pm8901_pldo, "vdd_l5" },
{ "l6", QCOM_RPM_PM8901_LDO6, &pm8901_pldo, "vdd_l6" },

- { "s0", QCOM_RPM_PM8901_SMPS0, &pm8901_ftsmps, "vdd_s0" },
- { "s1", QCOM_RPM_PM8901_SMPS1, &pm8901_ftsmps, "vdd_s1" },
- { "s2", QCOM_RPM_PM8901_SMPS2, &pm8901_ftsmps, "vdd_s2" },
- { "s3", QCOM_RPM_PM8901_SMPS3, &pm8901_ftsmps, "vdd_s3" },
- { "s4", QCOM_RPM_PM8901_SMPS4, &pm8901_ftsmps, "vdd_s4" },
-
{ "lvs0", QCOM_RPM_PM8901_LVS0, &pm8901_switch, "lvs0_in" },
{ "lvs1", QCOM_RPM_PM8901_LVS1, &pm8901_switch, "lvs1_in" },
{ "lvs2", QCOM_RPM_PM8901_LVS2, &pm8901_switch, "lvs2_in" },