linux-kernel - [PATCH RESEND v3] arm64: dts: ls1028a: fix FlexSPI clock

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Date:   Mon, 11 Jan 2021 12:45:55 +0100
From:   Michael Walle <michael@...le.cc>
To:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Shawn Guo <shawnguo@...nel.org>, Li Yang <leoyang.li@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Michael Walle <michael@...le.cc>
Subject: [PATCH RESEND v3] arm64: dts: ls1028a: fix FlexSPI clock

Now that we have a proper driver for the FlexSPI interface use it. This
will fix SCK frequency switching on Layerscape SoCs.

This was tested on the Kontron sl28 board.

Signed-off-by: Michael Walle <michael@...le.cc>
---
Hi Shawn,

this is the last remaining piece of my previous series [1]. Now with the
actual clock driver in v5.11 and the clockgen constants patches in your
for-next branch, there are no further dependencies.

[1] https://lore.kernel.org/lkml/20201108185113.31377-1-michael@walle.cc/

Changlog from the old series:
Changes since v2:
 - use device tree constants for clockgen
 - also use &fspi_clk for fspi_en clock

Changes since v1:
 - none

 arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
index e00acad9a5c1..0a5923e96d7f 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
@@ -206,9 +206,20 @@
 		};
 
 		dcfg: syscon@...0000 {
-			compatible = "fsl,ls1028a-dcfg", "syscon";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "fsl,ls1028a-dcfg", "syscon", "simple-mfd";
 			reg = <0x0 0x1e00000 0x0 0x10000>;
+			ranges = <0x0 0x0 0x1e00000 0x10000>;
 			little-endian;
+
+			fspi_clk: clock-controller@900 {
+				compatible = "fsl,ls1028a-flexspi-clk";
+				reg = <0x900 0x4>;
+				#clock-cells = <0>;
+				clocks = <&clockgen QORIQ_CLK_HWACCEL 0>;
+				clock-output-names = "fspi_clk";
+			};
 		};
 
 		rst: syscon@...0000 {
@@ -326,8 +337,7 @@
 			      <0x0 0x20000000 0x0 0x10000000>;
 			reg-names = "fspi_base", "fspi_mmap";
 			interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
-			clocks = <&clockgen QORIQ_CLK_HWACCEL 0>,
-				 <&clockgen QORIQ_CLK_HWACCEL 0>;
+			clocks = <&fspi_clk>, <&fspi_clk>;
 			clock-names = "fspi_en", "fspi";
 			status = "disabled";
 		};
-- 
2.20.1