Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux

regulator: qcom_rpm: Fix circular deferral regression

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>

authored by

Linus Walleij and committed by
Mark Brown
8478ed58 8d8e1659

+12 -12
+12 -12
drivers/regulator/qcom_rpm-regulator.c
··· 802 802 }; 803 803 804 804 static const struct rpm_regulator_data rpm_pm8058_regulators[] = { 805 + { "s0", QCOM_RPM_PM8058_SMPS0, &pm8058_smps, "vdd_s0" }, 806 + { "s1", QCOM_RPM_PM8058_SMPS1, &pm8058_smps, "vdd_s1" }, 807 + { "s2", QCOM_RPM_PM8058_SMPS2, &pm8058_smps, "vdd_s2" }, 808 + { "s3", QCOM_RPM_PM8058_SMPS3, &pm8058_smps, "vdd_s3" }, 809 + { "s4", QCOM_RPM_PM8058_SMPS4, &pm8058_smps, "vdd_s4" }, 810 + 805 811 { "l0", QCOM_RPM_PM8058_LDO0, &pm8058_nldo, "vdd_l0_l1_lvs" }, 806 812 { "l1", QCOM_RPM_PM8058_LDO1, &pm8058_nldo, "vdd_l0_l1_lvs" }, 807 813 { "l2", QCOM_RPM_PM8058_LDO2, &pm8058_pldo, "vdd_l2_l11_l12" }, ··· 835 829 { "l24", QCOM_RPM_PM8058_LDO24, &pm8058_nldo, "vdd_l23_l24_l25" }, 836 830 { "l25", QCOM_RPM_PM8058_LDO25, &pm8058_nldo, "vdd_l23_l24_l25" }, 837 831 838 - { "s0", QCOM_RPM_PM8058_SMPS0, &pm8058_smps, "vdd_s0" }, 839 - { "s1", QCOM_RPM_PM8058_SMPS1, &pm8058_smps, "vdd_s1" }, 840 - { "s2", QCOM_RPM_PM8058_SMPS2, &pm8058_smps, "vdd_s2" }, 841 - { "s3", QCOM_RPM_PM8058_SMPS3, &pm8058_smps, "vdd_s3" }, 842 - { "s4", QCOM_RPM_PM8058_SMPS4, &pm8058_smps, "vdd_s4" }, 843 - 844 832 { "lvs0", QCOM_RPM_PM8058_LVS0, &pm8058_switch, "vdd_l0_l1_lvs" }, 845 833 { "lvs1", QCOM_RPM_PM8058_LVS1, &pm8058_switch, "vdd_l0_l1_lvs" }, 846 834 ··· 843 843 }; 844 844 845 845 static const struct rpm_regulator_data rpm_pm8901_regulators[] = { 846 + { "s0", QCOM_RPM_PM8901_SMPS0, &pm8901_ftsmps, "vdd_s0" }, 847 + { "s1", QCOM_RPM_PM8901_SMPS1, &pm8901_ftsmps, "vdd_s1" }, 848 + { "s2", QCOM_RPM_PM8901_SMPS2, &pm8901_ftsmps, "vdd_s2" }, 849 + { "s3", QCOM_RPM_PM8901_SMPS3, &pm8901_ftsmps, "vdd_s3" }, 850 + { "s4", QCOM_RPM_PM8901_SMPS4, &pm8901_ftsmps, "vdd_s4" }, 851 + 846 852 { "l0", QCOM_RPM_PM8901_LDO0, &pm8901_nldo, "vdd_l0" }, 847 853 { "l1", QCOM_RPM_PM8901_LDO1, &pm8901_pldo, "vdd_l1" }, 848 854 { "l2", QCOM_RPM_PM8901_LDO2, &pm8901_pldo, "vdd_l2" }, ··· 856 850 { "l4", QCOM_RPM_PM8901_LDO4, &pm8901_pldo, "vdd_l4" }, 857 851 { "l5", QCOM_RPM_PM8901_LDO5, &pm8901_pldo, "vdd_l5" }, 858 852 { "l6", QCOM_RPM_PM8901_LDO6, &pm8901_pldo, "vdd_l6" }, 859 - 860 - { "s0", QCOM_RPM_PM8901_SMPS0, &pm8901_ftsmps, "vdd_s0" }, 861 - { "s1", QCOM_RPM_PM8901_SMPS1, &pm8901_ftsmps, "vdd_s1" }, 862 - { "s2", QCOM_RPM_PM8901_SMPS2, &pm8901_ftsmps, "vdd_s2" }, 863 - { "s3", QCOM_RPM_PM8901_SMPS3, &pm8901_ftsmps, "vdd_s3" }, 864 - { "s4", QCOM_RPM_PM8901_SMPS4, &pm8901_ftsmps, "vdd_s4" }, 865 853 866 854 { "lvs0", QCOM_RPM_PM8901_LVS0, &pm8901_switch, "lvs0_in" }, 867 855 { "lvs1", QCOM_RPM_PM8901_LVS1, &pm8901_switch, "lvs1_in" },