From: "Rong Zhang" <rongrong@oss.cipunited.com>
To: "Keguang Zhang" <keguang.zhang@gmail.com>,
"Wim Van Sebroeck" <wim@linux-watchdog.org>,
"Guenter Roeck" <linux@roeck-us.net>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Thomas Bogendoerfer" <tsbogend@alpha.franken.de>
Cc: "Rong Zhang" <i@rong.moe>, "Yao Zi" <me@ziyao.cc>,
"Icenowy Zheng" <uwu@icenowy.me>,
"Jiaxun Yang" <jiaxun.yang@flygoat.com>,
<linux-mips@vger.kernel.org>, <linux-watchdog@vger.kernel.org>,
<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
"Rong Zhang" <rongrong@oss.cipunited.com>,
"Conor Dooley" <conor@kernel.org>
Subject: [PATCH v2 6/8] MIPS: Loongson64: dts: ls7a-pch: Bind UART nodes to miscellaneous clock
Date: Fri, 13 Nov 2026 18:51:13 +0800 [thread overview]
Message-ID: <20261113-mips-ls7a-wdt-v2-6-e8abd6b2f77c@oss.cipunited.com> (raw)
In-Reply-To: <20261113-mips-ls7a-wdt-v2-0-e8abd6b2f77c@oss.cipunited.com>
The Loongson-7A's UART controllers are driven by an internal 50MHz clock
source called miscellaneous clock. The clock is nonconfigurable for
board manufacturer and software.
Therefore, the LS7A UART nodes don't need to be fixed up by
lefi_fixup_fdt_serial(), and can safely use clocks nodes rather than
clock-frequency ones.
Suggested-by: Conor Dooley <conor@kernel.org>
Link: https://msgid.link/20261111-oboe-shack-11c3e3ce0830@spud/
Signed-off-by: Rong Zhang <rongrong@oss.cipunited.com>
---
arch/mips/boot/dts/loongson/ls7a-pch.dtsi | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/mips/boot/dts/loongson/ls7a-pch.dtsi b/arch/mips/boot/dts/loongson/ls7a-pch.dtsi
index 2ef1ad10a8ec..7ba7bbb9c013 100644
--- a/arch/mips/boot/dts/loongson/ls7a-pch.dtsi
+++ b/arch/mips/boot/dts/loongson/ls7a-pch.dtsi
@@ -39,7 +39,7 @@ lpc: interrupt-controller@10002000 {
ls7a_uart0: serial@10080000 {
compatible = "ns16550a";
reg = <0x0 0x10080000 0x0 0x100>;
- clock-frequency = <50000000>;
+ clocks = <&pch_misc_clk>;
interrupt-parent = <&pic>;
interrupts = <8 IRQ_TYPE_LEVEL_HIGH>;
no-loopback-test;
@@ -49,7 +49,7 @@ ls7a_uart1: serial@10080100 {
status = "disabled";
compatible = "ns16550a";
reg = <0x0 0x10080100 0x0 0x100>;
- clock-frequency = <50000000>;
+ clocks = <&pch_misc_clk>;
interrupt-parent = <&pic>;
interrupts = <8 IRQ_TYPE_LEVEL_HIGH>;
no-loopback-test;
@@ -59,7 +59,7 @@ ls7a_uart2: serial@10080200 {
status = "disabled";
compatible = "ns16550a";
reg = <0x0 0x10080200 0x0 0x100>;
- clock-frequency = <50000000>;
+ clocks = <&pch_misc_clk>;
interrupt-parent = <&pic>;
interrupts = <8 IRQ_TYPE_LEVEL_HIGH>;
no-loopback-test;
@@ -69,7 +69,7 @@ ls7a_uart3: serial@10080300 {
status = "disabled";
compatible = "ns16550a";
reg = <0x0 0x10080300 0x0 0x100>;
- clock-frequency = <50000000>;
+ clocks = <&pch_misc_clk>;
interrupt-parent = <&pic>;
interrupts = <8 IRQ_TYPE_LEVEL_HIGH>;
no-loopback-test;
--
2.55.0
next prev parent reply other threads:[~2026-11-13 10:51 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-13 10:51 [PATCH v2 0/8] watchdog: loongson1: Add Loongson-7A watchdog support Rong Zhang
2026-11-13 10:51 ` [PATCH v2 1/8] dt-bindings: watchdog: loongson,ls1x-wdt: Add compatible for Loongson-7A Rong Zhang
2026-11-13 17:17 ` Conor Dooley
2026-11-13 10:51 ` [PATCH v2 2/8] MIPS: Loongson64: env: Don't warn if UART has clocks node when fixing up FDT Rong Zhang
2026-11-13 10:51 ` [PATCH v2 3/8] MIPS: Loongson64: dts: ls7a-pch: Add missing #address-cells to interrupt controllers Rong Zhang
2026-11-13 10:51 ` [PATCH v2 4/8] MIPS: Loongson64: dts: ls7a-pch: Use hex in ranges and reg properties Rong Zhang
2026-11-13 10:51 ` [PATCH v2 5/8] MIPS: Loongson64: dts: ls7a-pch: Add miscellaneous clock node Rong Zhang
2026-11-13 10:51 ` Rong Zhang [this message]
2026-11-13 10:51 ` [PATCH v2 7/8] MIPS: Loongson64: dts: ls7a-pch: Add watchdog node Rong Zhang
2026-11-13 10:51 ` [PATCH v2 8/8] MIPS: loongson3_defconfig: Enable LOONGSON1_WDT by default Rong Zhang
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