linux-kernel - [PATCH v4 2/2] riscv: dts: starfive: visionfive-2: Fix lower rate of CPUfreq by setting PLL0 rate to 1.5GHz

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Date: Wed, 10 Apr 2024 11:31:48 +0800
From: Xingyu Wu <xingyu.wu@...rfivetech.com>
To: Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Conor Dooley <conor@...nel.org>,
	Emil Renner Berthing <emil.renner.berthing@...onical.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc: Emil Renner Berthing <kernel@...il.dk>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Hal Feng <hal.feng@...rfivetech.com>,
	Xingyu Wu <xingyu.wu@...rfivetech.com>,
	linux-kernel@...r.kernel.org,
	linux-clk@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	devicetree@...r.kernel.org
Subject: [PATCH v4 2/2] riscv: dts: starfive: visionfive-2: Fix lower rate of CPUfreq by setting PLL0 rate to 1.5GHz

CPUfreq supports 4 cpu frequency loads on 375/500/750/1500MHz.
But now PLL0 rate is 1GHz and the cpu frequency loads become
333/500/500/1000MHz in fact.

So PLL0 rate should be default set to 1.5GHz and set the
cpu_core rate to 500MHz in safe.

Fixes: e2c510d6d630 ("riscv: dts: starfive: Add cpu scaling for JH7110 SoC")
Signed-off-by: Xingyu Wu <xingyu.wu@...rfivetech.com>
---
 .../boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi     | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
index 45b58b6f3df8..28981b267de4 100644
--- a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
+++ b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
@@ -390,6 +390,12 @@ spi_dev0: spi@0 {
 	};
 };
 
+&syscrg {
+	assigned-clocks = <&syscrg JH7110_SYSCLK_CPU_CORE>,
+			  <&pllclk JH7110_PLLCLK_PLL0_OUT>;
+	assigned-clock-rates = <500000000>, <1500000000>;
+};
+
 &sysgpio {
 	i2c0_pins: i2c0-0 {
 		i2c-pins {
-- 
2.25.1