linux-kernel - [PATCH v2] arm64: dts: qcom: sc7280-herobrine: Audio codec wants 1.8V, not 1.62V

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220411141332.v2.1.I9f06fec63b978699fe62591fec9e5ac31bb3a69d@changeid>
Date:   Mon, 11 Apr 2022 14:13:39 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Matthias Kaehlcke <mka@...omium.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Judy Hsiao <judyhsiao@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Andy Gross <agross@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] arm64: dts: qcom: sc7280-herobrine: Audio codec wants 1.8V, not 1.62V

The L2C rail on herobrine boards is intended to go to the audio
codec. Let's override the 1.62V specified in the qcard.dtsi file to be
1.8V.

Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

Changes in v2:
- Adjust Qcard regulator override section heading

 arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi b/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi
index 10de5e104b4f..d58045dd7334 100644
--- a/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi
@@ -308,7 +308,10 @@ keyboard_backlight: keyboard-backlight {
 };
 
 /*
- * BOARD-LOCAL NAMES FOR REGULATORS THAT CONNECT TO QCARD
+ * ADJUSTMENTS TO QCARD REGULATORS
+ *
+ * Mostly this is just board-local names for regulators that come from
+ * Qcard, but this also has some minor regulator overrides.
  *
  * Names are only listed here if regulators go somewhere other than a
  * testpoint.
@@ -352,6 +355,16 @@ keyboard_backlight: keyboard-backlight {
 ts_avdd:      &pp3300_left_in_mlb {};
 vreg_edp_3p3: &pp3300_left_in_mlb {};
 
+/* Regulator overrides from Qcard */
+
+/*
+ * Herobrine boards only use l2c to power an external audio codec (like
+ * alc5682) and we want that to be at 1.8V, not at some slightly lower voltage.
+ */
+&vreg_l2c_1p8 {
+	regulator-min-microvolt = <1800000>;
+};
+
 /* ADDITIONS TO NODES DEFINED IN PARENT DEVICE TREE FILES */
 
 ap_sar_sensor_i2c: &i2c1 {
-- 
2.35.1.1178.g4f1659d476-goog