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From:   Douglas Anderson <dianders@chromium.org>
To:     Bjorn Andersson <bjorn.andersson@linaro.org>
Cc:     Andrew Halaney <ahalaney@redhat.com>,
        Mark Brown <broonie@kernel.org>,
        Douglas Anderson <dianders@chromium.org>,
        Andy Gross <agross@kernel.org>,
        Johan Hovold <johan+linaro@kernel.org>,
        Konrad Dybcio <konrad.dybcio@somainline.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Rob Herring <robh+dt@kernel.org>, devicetree@vger.kernel.org,
        linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 4/7] arm64: dts: qcom: sc8280xp-thinkpad-x13s: Specify which LDO modes are allowed
Date:   Thu, 25 Aug 2022 09:42:02 -0700
Message-Id: <20220825094155.4.I897770a7ac41f8dc3e37dfed12102bacdbf9da56@changeid>
In-Reply-To: <20220825164205.4060647-1-dianders@chromium.org>
References: <20220825164205.4060647-1-dianders@chromium.org>
MIME-Version: 1.0
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Precedence: bulk

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: 32c231385ed4 ("arm64: dts: qcom: sc8280xp: add Lenovo Thinkpad X13s devicetree")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
---

 .../qcom/sc8280xp-lenovo-thinkpad-x13s.dts    | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
index 16c6e4d920bb..0c2534b4ec24 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
+++ b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts
@@ -80,6 +80,9 @@ vreg_l3b: ldo3 {
 			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>;
 			regulator-boot-on;
 		};
 
@@ -89,6 +92,9 @@ vreg_l4b: ldo4 {
 			regulator-max-microvolt = <912000>;
 			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
 			regulator-allow-set-load;
+			regulator-allowed-modes =
+			    <RPMH_REGULATOR_MODE_LPM
+			     RPMH_REGULATOR_MODE_HPM>;
 		};
 
 		vreg_l6b: ldo6 {
@@ -97,6 +103,9 @@ vreg_l6b: ldo6 {
 			regulator-max-microvolt = <880000>;
 			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
 			regulator-allow-set-load;
+			regulator-allowed-modes =
+			    <RPMH_REGULATOR_MODE_LPM
+			     RPMH_REGULATOR_MODE_HPM>;
 			regulator-boot-on;
 			regulator-always-on;	// FIXME: VDD_A_EDP_0_0P9
 		};
@@ -112,6 +121,9 @@ vreg_l1c: ldo1 {
 			regulator-max-microvolt = <1800000>;
 			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
 			regulator-allow-set-load;
+			regulator-allowed-modes =
+			    <RPMH_REGULATOR_MODE_LPM
+			     RPMH_REGULATOR_MODE_HPM>;
 		};
 
 		vreg_l12c: ldo12 {
@@ -120,6 +132,9 @@ vreg_l12c: ldo12 {
 			regulator-max-microvolt = <1800000>;
 			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
 			regulator-allow-set-load;
+			regulator-allowed-modes =
+			    <RPMH_REGULATOR_MODE_LPM
+			     RPMH_REGULATOR_MODE_HPM>;
 		};
 
 		vreg_l13c: ldo13 {
@@ -128,6 +143,9 @@ vreg_l13c: ldo13 {
 			regulator-max-microvolt = <3072000>;
 			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
 			regulator-allow-set-load;
+			regulator-allowed-modes =
+			    <RPMH_REGULATOR_MODE_LPM
+			     RPMH_REGULATOR_MODE_HPM>;
 		};
 	};
 
@@ -143,6 +161,9 @@ vreg_l3d: ldo3 {
 			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>;
 		};
 
 		vreg_l4d: ldo4 {
@@ -151,6 +172,9 @@ vreg_l4d: ldo4 {
 			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>;
 		};
 
 		vreg_l7d: ldo7 {
@@ -159,6 +183,9 @@ vreg_l7d: ldo7 {
 			regulator-max-microvolt = <3072000>;
 			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
 			regulator-allow-set-load;
+			regulator-allowed-modes =
+			    <RPMH_REGULATOR_MODE_LPM
+			     RPMH_REGULATOR_MODE_HPM>;
 		};
 
 		vreg_l9d: ldo9 {
@@ -167,6 +194,9 @@ vreg_l9d: ldo9 {
 			regulator-max-microvolt = <912000>;
 			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