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ecbfba694b
Some of the regulators must be always-on to ensure correct operation of
the system, e.g. PM8916 L2 for the LPDDR RAM, L5 for most digital I/O
and L7 for the CPU PLL (strictly speaking the CPU PLL might only need
an active-only vote but this is not supported for regulators in
mainline currently).
The RPM firmware seems to enforce that internally, these supplies stay
on even if we vote for them to power off (and there is no other
processor running). This means it's pointless to keep sending
enable/disable requests because they will just be ignored.
Also, drivers are much more likely to get a wrong impression of the
regulator status, because regulator_is_enabled() will return false when
there are no users, even though the regulator is always on.
Describe this properly by marking the regulators as always-on.
The same changes was already made for MSM8916 in commit 8bbd35771f
("arm64: dts: qcom: msm8916-pm8916: Mark always-on regulators").
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230530-msm8939-regulators-v1-8-a3c3ac833567@gerhold.net
162 lines
3.6 KiB
Plaintext
162 lines
3.6 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* msm8939-pm8916.dtsi describes common properties (e.g. regulator connections)
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* that apply to most devices that make use of the MSM8939 SoC and PM8916 PMIC.
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* Many regulators have a fixed purpose in the original reference design and
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* were rarely re-used for different purposes. Devices that deviate from the
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* typical reference design should not make use of this include and instead add
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* the necessary properties in the board-specific device tree.
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*/
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#include "msm8939.dtsi"
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#include "pm8916.dtsi"
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&mdss_dsi0 {
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vdda-supply = <&pm8916_l2>;
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vddio-supply = <&pm8916_l6>;
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};
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&mdss_dsi0_phy {
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vddio-supply = <&pm8916_l6>;
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};
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&mdss_dsi1 {
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vdda-supply = <&pm8916_l2>;
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vddio-supply = <&pm8916_l6>;
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};
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&mdss_dsi1_phy {
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vddio-supply = <&pm8916_l6>;
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};
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&mpss {
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pll-supply = <&pm8916_l7>;
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};
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&pm8916_codec {
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vdd-cdc-io-supply = <&pm8916_l5>;
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vdd-cdc-tx-rx-cx-supply = <&pm8916_l5>;
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vdd-micbias-supply = <&pm8916_l13>;
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};
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&rpm_requests {
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pm8916_rpm_regulators: regulators {
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compatible = "qcom,rpm-pm8916-regulators";
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vdd_l1_l2_l3-supply = <&pm8916_s3>;
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vdd_l4_l5_l6-supply = <&pm8916_s4>;
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vdd_l7-supply = <&pm8916_s4>;
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/* pm8916_s1 is managed by rpmpd (MSM8939_VDDMDCX) */
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/* pm8916_s2 is managed by rpmpd (MSM8939_VDDCX) */
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pm8916_s3: s3 {
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regulator-min-microvolt = <1250000>;
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regulator-max-microvolt = <1350000>;
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regulator-always-on; /* Needed for L2 */
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};
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pm8916_s4: s4 {
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regulator-min-microvolt = <1850000>;
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regulator-max-microvolt = <2150000>;
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regulator-always-on; /* Needed for L5/L7 */
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};
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/*
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* Some of the regulators are unused or managed by another
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* processor (e.g. the modem). We should still define nodes for
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* them to ensure the vote from the application processor can be
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* dropped in case the regulators are already on during boot.
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*
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* The labels for these nodes are omitted on purpose because
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* boards should configure a proper voltage before using them.
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*/
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l1 {};
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pm8916_l2: l2 {
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regulator-min-microvolt = <1200000>;
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regulator-max-microvolt = <1200000>;
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regulator-always-on; /* Needed for LPDDR RAM */
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};
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/* pm8916_l3 is managed by rpmpd (MSM8939_VDDMX) */
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l4 {};
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pm8916_l5: l5 {
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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regulator-always-on; /* Needed for most digital I/O */
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};
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pm8916_l6: l6 {
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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};
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pm8916_l7: l7 {
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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regulator-always-on; /* Needed for CPU PLL */
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};
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pm8916_l8: l8 {
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regulator-min-microvolt = <2900000>;
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regulator-max-microvolt = <2900000>;
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};
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pm8916_l9: l9 {
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regulator-min-microvolt = <3300000>;
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regulator-max-microvolt = <3300000>;
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};
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l10 {};
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pm8916_l11: l11 {
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regulator-min-microvolt = <2950000>;
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regulator-max-microvolt = <2950000>;
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regulator-allow-set-load;
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regulator-system-load = <200000>;
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};
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pm8916_l12: l12 {
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <2950000>;
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};
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pm8916_l13: l13 {
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regulator-min-microvolt = <3075000>;
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regulator-max-microvolt = <3075000>;
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};
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l14 {};
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l15 {};
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l16 {};
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l17 {};
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l18 {};
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};
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};
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&sdhc_1 {
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vmmc-supply = <&pm8916_l8>;
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vqmmc-supply = <&pm8916_l5>;
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};
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&sdhc_2 {
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vmmc-supply = <&pm8916_l11>;
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vqmmc-supply = <&pm8916_l12>;
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};
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&usb_hs_phy {
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v1p8-supply = <&pm8916_l7>;
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v3p3-supply = <&pm8916_l13>;
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};
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&wcnss {
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vddpx-supply = <&pm8916_l7>;
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};
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&wcnss_iris {
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vddxo-supply = <&pm8916_l7>;
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vddrfa-supply = <&pm8916_s3>;
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vddpa-supply = <&pm8916_l9>;
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vdddig-supply = <&pm8916_l5>;
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};
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