On 9/7/23 17:45, Marco Felsch wrote:
Hi Marek,
Hi,
On 23-08-31, Marek Vasut wrote:
Describe VDD_ARM (BUCK2) run and standby voltage in DT.
Signed-off-by: Marek Vasut <marex@xxxxxxx>
---
Cc: Conor Dooley <conor+dt@xxxxxxxxxx>
Cc: Fabio Estevam <festevam@xxxxxxxxx>
Cc: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx>
Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx>
Cc: Magnus Damm <magnus.damm@xxxxxxxxx>
Cc: Marek Vasut <marex@xxxxxxx>
Cc: NXP Linux Team <linux-imx@xxxxxxx>
Cc: Peng Fan <peng.fan@xxxxxxx>
Cc: Pengutronix Kernel Team <kernel@xxxxxxxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Cc: Shawn Guo <shawnguo@xxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
---
arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
index cb1953d14aa90..1644b56c3953d 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
@@ -293,6 +293,8 @@ buck1: BUCK1 { /* VDD_SOC (dual-phase with BUCK3) */
};
buck2: BUCK2 { /* VDD_ARM */
+ nxp,dvs-run-voltage = <950000>;
Why do we need to set the "nxp,dvs-run-voltage"? If I read the driver
correctly, then nxp,dvs-run-voltage and regulator-min/max-microvolt are
touching the same register.
My understanding is that the nxp,dvs-run-voltage selects the default
regulator voltage which is configured early on once the regulator is
detected in DT (see of_parse_cb callback in the PCA9450 regulator
driver) and may be higher than regulator-min-microvolt, while later on
DVFS can adjust the regulator in range of regulator-min-microvolt to
regulator-max-microvolt .
+ nxp,dvs-standby-voltage = <850000>;
regulator-min-microvolt = <850000>;
regulator-max-microvolt = <1000000>;
[...]
