linux-kernel - [PATCH v3 5/8] arm64: dts: imx8mm-kontron: Remove low DDRC operating point

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Date:   Mon, 15 Aug 2022 13:01:28 +0200
From:   Frieder Schrempf <frieder@...s.de>
To:     devicetree@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>
Cc:     Frieder Schrempf <frieder.schrempf@...tron.de>,
        Fabio Estevam <festevam@...il.com>,
        Heiko Thiery <heiko.thiery@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>
Subject: [PATCH v3 5/8] arm64: dts: imx8mm-kontron: Remove low DDRC operating point

From: Frieder Schrempf <frieder.schrempf@...tron.de>

For some reason there is a problem with finding a DDR configuration
that works on all operating points and all LPDDR4 types used on the
SoM. Therefore the bootloader currently doesn't configure the lowest
of the three operating points. Let's also skip this in the kernel
devicetree to make sure it isn't used.

Signed-off-by: Frieder Schrempf <frieder.schrempf@...tron.de>
---
Changes in v3:
* rebase on v6.0-rc1

Changes in v2:
* none
---
 arch/arm64/boot/dts/freescale/imx8mm-kontron-sl.dtsi | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-kontron-sl.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-kontron-sl.dtsi
index 33179157f619..96ecdce67059 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-kontron-sl.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-sl.dtsi
@@ -46,10 +46,6 @@ &ddrc {
 	ddrc_opp_table: opp-table {
 		compatible = "operating-points-v2";
 
-		opp-25M {
-			opp-hz = /bits/ 64 <25000000>;
-		};
-
 		opp-100M {
 			opp-hz = /bits/ 64 <100000000>;
 		};
-- 
2.37.1