2022-08-25 17:03:39

by Doug Anderson

Subject: [PATCH 7/7] arm64: dts: qcom: sm8350-hdk: Specify which LDO modes are allowed

This board uses RPMH, specifies "regulator-allow-set-load" for LDOs,
but doesn't specify any modes with "regulator-allowed-modes".

Prior to commit efb0cb50c427 ("regulator: qcom-rpmh: Implement
get_optimum_mode(), not set_load()") the above meant that we were able
to set either LPM or HPM mode. After that commit (and fixes [1]) we'll
be stuck at the initial mode. Discussion of this has resulted in the
decision that the old dts files were wrong and should be fixed to
fully restore old functionality.

Let's re-enable the old functionality by fixing the dts.

[1] https://lore.kernel.org/r/20220824142229.RFT.v2.2.I6f77860e5cd98bf5c67208fa9edda4a08847c304@changeid

Fixes: 9208c19f2124 ("arm64: dts: qcom: Introduce SM8350 HDK")
Signed-off-by: Douglas Anderson <[email protected]>
---

arch/arm64/boot/dts/qcom/sm8350-hdk.dts | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm8350-hdk.dts b/arch/arm64/boot/dts/qcom/sm8350-hdk.dts
index 0fcf5bd88fc7..69ae6503c2f6 100644
--- a/arch/arm64/boot/dts/qcom/sm8350-hdk.dts
+++ b/arch/arm64/boot/dts/qcom/sm8350-hdk.dts
@@ -107,6 +107,9 @@ vreg_l5b_0p88: ldo5 {
regulator-max-microvolt = <888000>;
regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
regulator-allow-set-load;
+ regulator-allowed-modes =
+ <RPMH_REGULATOR_MODE_LPM
+ RPMH_REGULATOR_MODE_HPM>;
};

vreg_l6b_1p2: ldo6 {
@@ -115,6 +118,9 @@ vreg_l6b_1p2: ldo6 {
regulator-max-microvolt = <1208000>;
regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
regulator-allow-set-load;
+ regulator-allowed-modes =
+ <RPMH_REGULATOR_MODE_LPM
+ RPMH_REGULATOR_MODE_HPM>;
};

vreg_l7b_2p96: ldo7 {
@@ -123,6 +129,9 @@ vreg_l7b_2p96: ldo7 {
regulator-max-microvolt = <2504000>;
regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
regulator-allow-set-load;
+ regulator-allowed-modes =
+ <RPMH_REGULATOR_MODE_LPM
+ RPMH_REGULATOR_MODE_HPM>;
};

vreg_l9b_1p2: ldo9 {
@@ -131,6 +140,9 @@ vreg_l9b_1p2: ldo9 {
regulator-max-microvolt = <1200000>;
regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
regulator-allow-set-load;
+ regulator-allowed-modes =
+ <RPMH_REGULATOR_MODE_LPM
+ RPMH_REGULATOR_MODE_HPM>;
};
};

--
2.37.2.672.g94769d06f0-goog

2022-08-25 22:32:52

by Andrew Halaney

Subject: Re: [PATCH 7/7] arm64: dts: qcom: sm8350-hdk: Specify which LDO modes are allowed

On Thu, Aug 25, 2022 at 09:42:05AM -0700, Douglas Anderson wrote:
> This board uses RPMH, specifies "regulator-allow-set-load" for LDOs,
> but doesn't specify any modes with "regulator-allowed-modes".
>
> Prior to commit efb0cb50c427 ("regulator: qcom-rpmh: Implement
> get_optimum_mode(), not set_load()") the above meant that we were able
> to set either LPM or HPM mode. After that commit (and fixes [1]) we'll
> be stuck at the initial mode. Discussion of this has resulted in the
> decision that the old dts files were wrong and should be fixed to
> fully restore old functionality.
>
> Let's re-enable the old functionality by fixing the dts.
>
> [1] https://lore.kernel.org/r/20220824142229.RFT.v2.2.I6f77860e5cd98bf5c67208fa9edda4a08847c304@changeid
>
> Fixes: 9208c19f2124 ("arm64: dts: qcom: Introduce SM8350 HDK")
> Signed-off-by: Douglas Anderson <[email protected]>

Reviewed-by: Andrew Halaney <[email protected]>

> ---
>
> arch/arm64/boot/dts/qcom/sm8350-hdk.dts | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/sm8350-hdk.dts b/arch/arm64/boot/dts/qcom/sm8350-hdk.dts
> index 0fcf5bd88fc7..69ae6503c2f6 100644
> --- a/arch/arm64/boot/dts/qcom/sm8350-hdk.dts
> +++ b/arch/arm64/boot/dts/qcom/sm8350-hdk.dts
> @@ -107,6 +107,9 @@ vreg_l5b_0p88: ldo5 {
> regulator-max-microvolt = <888000>;
> regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> regulator-allow-set-load;
> + regulator-allowed-modes =
> + <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> };
>
> vreg_l6b_1p2: ldo6 {
> @@ -115,6 +118,9 @@ vreg_l6b_1p2: ldo6 {
> regulator-max-microvolt = <1208000>;
> regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> regulator-allow-set-load;
> + regulator-allowed-modes =
> + <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> };
>
> vreg_l7b_2p96: ldo7 {
> @@ -123,6 +129,9 @@ vreg_l7b_2p96: ldo7 {
> regulator-max-microvolt = <2504000>;
> regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> regulator-allow-set-load;
> + regulator-allowed-modes =
> + <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> };
>
> vreg_l9b_1p2: ldo9 {
> @@ -131,6 +140,9 @@ vreg_l9b_1p2: ldo9 {
> regulator-max-microvolt = <1200000>;
> regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> regulator-allow-set-load;
> + regulator-allowed-modes =
> + <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> };
> };
>
> --
> 2.37.2.672.g94769d06f0-goog
>

2022-08-26 05:11:24

by Vinod Koul

Subject: Re: [PATCH 7/7] arm64: dts: qcom: sm8350-hdk: Specify which LDO modes are allowed

On 25-08-22, 09:42, Douglas Anderson wrote:
> This board uses RPMH, specifies "regulator-allow-set-load" for LDOs,
> but doesn't specify any modes with "regulator-allowed-modes".
>
> Prior to commit efb0cb50c427 ("regulator: qcom-rpmh: Implement
> get_optimum_mode(), not set_load()") the above meant that we were able
> to set either LPM or HPM mode. After that commit (and fixes [1]) we'll
> be stuck at the initial mode. Discussion of this has resulted in the
> decision that the old dts files were wrong and should be fixed to
> fully restore old functionality.
>
> Let's re-enable the old functionality by fixing the dts.

Reviewed-by: Vinod Koul <[email protected]>

--
~Vinod

2022-08-26 19:22:05

by Konrad Dybcio

Subject: Re: [PATCH 7/7] arm64: dts: qcom: sm8350-hdk: Specify which LDO modes are allowed

On 25.08.2022 18:42, Douglas Anderson wrote:
> This board uses RPMH, specifies "regulator-allow-set-load" for LDOs,
> but doesn't specify any modes with "regulator-allowed-modes".
>
> Prior to commit efb0cb50c427 ("regulator: qcom-rpmh: Implement
> get_optimum_mode(), not set_load()") the above meant that we were able
> to set either LPM or HPM mode. After that commit (and fixes [1]) we'll
> be stuck at the initial mode. Discussion of this has resulted in the
> decision that the old dts files were wrong and should be fixed to
> fully restore old functionality.
>
> Let's re-enable the old functionality by fixing the dts.
>
> [1] https://lore.kernel.org/r/20220824142229.RFT.v2.2.I6f77860e5cd98bf5c67208fa9edda4a08847c304@changeid
>
> Fixes: 9208c19f2124 ("arm64: dts: qcom: Introduce SM8350 HDK")
> Signed-off-by: Douglas Anderson <[email protected]>
> ---
Reviewed-by: Konrad Dybcio <[email protected]>

Konrad

>
> arch/arm64/boot/dts/qcom/sm8350-hdk.dts | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/sm8350-hdk.dts b/arch/arm64/boot/dts/qcom/sm8350-hdk.dts
> index 0fcf5bd88fc7..69ae6503c2f6 100644
> --- a/arch/arm64/boot/dts/qcom/sm8350-hdk.dts
> +++ b/arch/arm64/boot/dts/qcom/sm8350-hdk.dts
> @@ -107,6 +107,9 @@ vreg_l5b_0p88: ldo5 {
> regulator-max-microvolt = <888000>;
> regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> regulator-allow-set-load;
> + regulator-allowed-modes =
> + <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> };
>
> vreg_l6b_1p2: ldo6 {
> @@ -115,6 +118,9 @@ vreg_l6b_1p2: ldo6 {
> regulator-max-microvolt = <1208000>;
> regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> regulator-allow-set-load;
> + regulator-allowed-modes =
> + <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> };
>
> vreg_l7b_2p96: ldo7 {
> @@ -123,6 +129,9 @@ vreg_l7b_2p96: ldo7 {
> regulator-max-microvolt = <2504000>;
> regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> regulator-allow-set-load;
> + regulator-allowed-modes =
> + <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> };
>
> vreg_l9b_1p2: ldo9 {
> @@ -131,6 +140,9 @@ vreg_l9b_1p2: ldo9 {
> regulator-max-microvolt = <1200000>;
> regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> regulator-allow-set-load;
> + regulator-allowed-modes =
> + <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> };
> };
>