[RFC net-next v1 1/7] riscv: dts: microchip: add tsu clock to macb on mpfs

From: Conor Dooley <conor@kernel.org>
To: netdev@vger.kernel.org
Cc: conor@kernel.org, Conor Dooley <conor.dooley@microchip.com>,
	Valentina.FernandezAlanis@microchip.com,
	Andrew Lunn <andrew+netdev@lunn.ch>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Daire McNamara <daire.mcnamara@microchip.com>,
	Paul Walmsley <pjw@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Alexandre Ghiti <alex@ghiti.fr>,
	Nicolas Ferre <nicolas.ferre@microchip.com>,
	Claudiu Beznea <claudiu.beznea@tuxon.dev>,
	Richard Cochran <richardcochran@gmail.com>,
	Samuel Holland <samuel.holland@sifive.com>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-riscv@lists.infradead.org,
	Neil Armstrong <narmstrong@baylibre.com>,
	Dave Stevenson <dave.stevenson@raspberrypi.com>,
	Sean Anderson <sean.anderson@linux.dev>,
	Vineeth Karumanchi <vineeth.karumanchi@amd.com>,
	Abin Joseph <abin.joseph@amd.com>
Subject: [RFC net-next v1 1/7] riscv: dts: microchip: add tsu clock to macb on mpfs
Date: Thu, 20 Nov 2025 16:26:03 +0000	[thread overview]
Message-ID: <20251120-ahead-filth-d4d9c560d213@spud> (raw)
In-Reply-To: <20251120-jubilant-purposely-67ec45ce4e2f@spud>

From: Conor Dooley <conor.dooley@microchip.com>

In increment mode, the tsu clock for the macb is provided separately to
the pck, usually the same clock as the reference to the rtc provided by
an off-chip oscillator. pclk is 150 MHz typically, and the reference is
either 100 MHz or 125 MHz, so having the tsu clock is required for
correct rate selection.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
 arch/riscv/boot/dts/microchip/Makefile.orig | 26 +++++++++++++++++++++
 arch/riscv/boot/dts/microchip/mpfs.dtsi     |  8 +++----
 2 files changed, 30 insertions(+), 4 deletions(-)
 create mode 100644 arch/riscv/boot/dts/microchip/Makefile.orig

diff --git a/arch/riscv/boot/dts/microchip/Makefile.orig b/arch/riscv/boot/dts/microchip/Makefile.orig
new file mode 100644
index 000000000000..e94f4096fd40
--- /dev/null
+++ b/arch/riscv/boot/dts/microchip/Makefile.orig
@@ -0,0 +1,26 @@
+# SPDX-License-Identifier: GPL-2.0
+<<<<<<< HEAD
+dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-beaglev-fire.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-disco-kit.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-icicle-kit.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-icicle-kit-prod.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-m100pfsevp.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-polarberry.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-sev-kit.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-tysom-m.dtb
+||||||| constructed fake ancestor
+dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-beaglev-fire.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-icicle-kit.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-m100pfsevp.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-polarberry.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-sev-kit.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-tysom-m.dtb
+=======
+dtb-$(CONFIG_ARCH_MICROCHIP) += mpfs-beaglev-fire.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP) += mpfs-icicle-kit.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP) += mpfs-m100pfsevp.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP) += mpfs-polarberry.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP) += mpfs-sev-kit.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP) += mpfs-tysom-m.dtb
+>>>>>>> riscv: dts: microchip: remove POLARFIRE mention in Makefile
+dtb-$(CONFIG_ARCH_MICROCHIP) += pic64gx-curiosity-kit.dtb
diff --git a/arch/riscv/boot/dts/microchip/mpfs.dtsi b/arch/riscv/boot/dts/microchip/mpfs.dtsi
index 9883ca3554c5..68e130550130 100644
--- a/arch/riscv/boot/dts/microchip/mpfs.dtsi
+++ b/arch/riscv/boot/dts/microchip/mpfs.dtsi
@@ -445,8 +445,8 @@ mac0: ethernet@20110000 {
 			interrupt-parent = <&plic>;
 			interrupts = <64>, <65>, <66>, <67>, <68>, <69>;
 			local-mac-address = [00 00 00 00 00 00];
-			clocks = <&clkcfg CLK_MAC0>, <&clkcfg CLK_AHB>;
-			clock-names = "pclk", "hclk";
+			clocks = <&clkcfg CLK_MAC0>, <&clkcfg CLK_AHB>, <&refclk>;
+			clock-names = "pclk", "hclk", "tsu_clk";
 			resets = <&clkcfg CLK_MAC0>;
 			status = "disabled";
 		};
@@ -459,8 +459,8 @@ mac1: ethernet@20112000 {
 			interrupt-parent = <&plic>;
 			interrupts = <70>, <71>, <72>, <73>, <74>, <75>;
 			local-mac-address = [00 00 00 00 00 00];
-			clocks = <&clkcfg CLK_MAC1>, <&clkcfg CLK_AHB>;
-			clock-names = "pclk", "hclk";
+			clocks = <&clkcfg CLK_MAC1>, <&clkcfg CLK_AHB>, <&refclk>;
+			clock-names = "pclk", "hclk", "tsu_clk";
 			resets = <&clkcfg CLK_MAC1>;
 			status = "disabled";
 		};
-- 
2.51.0


_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
