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From: Shenwei Wang <shenwei.wang@nxp.com>
To: Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>,
	Fabio Estevam <festevam@gmail.com>,
	devicetree@vger.kernel.org, imx@lists.linux.dev,
	linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com,
	Shenwei Wang <shenwei.wang@nxp.com>
Subject: [PATCH] arm64: dts: imx93: update default value for snps,clk-csr
Date: Wed, 10 Jul 2024 15:08:33 -0500	[thread overview]
Message-ID: <20240710200833.153521-1-shenwei.wang@nxp.com> (raw)

For the i.MX93 SoC, the clock rate for the IP of STMMAC EQOS is 315 MHz.
According to the following mapping table from the i.MX93 reference manual,
this clock rate corresponds to a CSR value of 6.

 0100: CSR clock = 150-250 MHz; MDC clock = CSR clock/102
 0101: CSR clock = 250-300 MHz; MDC clock = CSR clock/124
 0110: CSR clock = 300-500 MHz; MDC clock = CSR clock/204
 0111: CSR clock = 500-800 MHz; MDC clock = CSR clock/324

Signed-off-by: Shenwei Wang <shenwei.wang@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx93.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx93.dtsi b/arch/arm64/boot/dts/freescale/imx93.dtsi
index 4a3f42355cb8..a0993022c102 100644
--- a/arch/arm64/boot/dts/freescale/imx93.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx93.dtsi
@@ -1105,7 +1105,7 @@ eqos: ethernet@428a0000 {
 							 <&clk IMX93_CLK_SYS_PLL_PFD0_DIV2>;
 				assigned-clock-rates = <100000000>, <250000000>;
 				intf_mode = <&wakeupmix_gpr 0x28>;
-				snps,clk-csr = <0>;
+				snps,clk-csr = <6>;
 				nvmem-cells = <&eth_mac2>;
 				nvmem-cell-names = "mac-address";
 				status = "disabled";
-- 
2.34.1


             reply	other threads:[~2024-07-10 20:09 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-07-10 20:08 Shenwei Wang [this message]
2024-07-11  6:09 ` [PATCH] arm64: dts: imx93: update default value for snps,clk-csr Alexander Stein
2024-07-11 13:22   ` Shenwei Wang

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