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Message-Id: <20250424-05-dts-clock-v2-2-17d83a705c4c@gentoo.org>
Date: Thu, 24 Apr 2025 15:48:09 +0800
From: Yixun Lan <dlan@...too.org>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
Alexandre Ghiti <alex@...ti.fr>
Cc: Alex Elder <elder@...cstar.com>, Haylen Chu <heylenay@....org>,
devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
spacemit@...ts.linux.dev, linux-kernel@...r.kernel.org,
Yixun Lan <dlan@...too.org>
Subject: [PATCH v2 2/2] riscv: dts: spacemit: Acquire clocks for UART
The K1 SoC features two clocks for UART controller, Acquire them
explicitly in the driver. Also it is required to remove the
clock-frequency properties from the uart node, otherwise the new
clock properties are ignored by of_platform_serial_setup() in "8250_of.c".
Reviewed-by: Alex Elder <elder@...cstar.com>
Reviewed-by: Haylen Chu <heylenay@....org>
Signed-off-by: Yixun Lan <dlan@...too.org>
---
arch/riscv/boot/dts/spacemit/k1.dtsi | 36 +++++++++++++++++++++++++++---------
1 file changed, 27 insertions(+), 9 deletions(-)
diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spacemit/k1.dtsi
index 153fd1160182b42fe1a2f7f042c9c1da90f63b0c..7793fd37841ab432c66629b95b94c195b379ecd9 100644
--- a/arch/riscv/boot/dts/spacemit/k1.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1.dtsi
@@ -360,8 +360,10 @@ syscon_apbc: system-control@...15000 {
uart0: serial@...17000 {
compatible = "spacemit,k1-uart", "intel,xscale-uart";
reg = <0x0 0xd4017000 0x0 0x100>;
+ clocks = <&syscon_apbc CLK_UART0>,
+ <&syscon_apbc CLK_UART0_BUS>;
+ clock-names = "core", "bus";
interrupts = <42>;
- clock-frequency = <14857000>;
reg-shift = <2>;
reg-io-width = <4>;
status = "disabled";
@@ -370,8 +372,10 @@ uart0: serial@...17000 {
uart2: serial@...17100 {
compatible = "spacemit,k1-uart", "intel,xscale-uart";
reg = <0x0 0xd4017100 0x0 0x100>;
+ clocks = <&syscon_apbc CLK_UART2>,
+ <&syscon_apbc CLK_UART2_BUS>;
+ clock-names = "core", "bus";
interrupts = <44>;
- clock-frequency = <14857000>;
reg-shift = <2>;
reg-io-width = <4>;
status = "disabled";
@@ -380,8 +384,10 @@ uart2: serial@...17100 {
uart3: serial@...17200 {
compatible = "spacemit,k1-uart", "intel,xscale-uart";
reg = <0x0 0xd4017200 0x0 0x100>;
+ clocks = <&syscon_apbc CLK_UART3>,
+ <&syscon_apbc CLK_UART3_BUS>;
+ clock-names = "core", "bus";
interrupts = <45>;
- clock-frequency = <14857000>;
reg-shift = <2>;
reg-io-width = <4>;
status = "disabled";
@@ -390,8 +396,10 @@ uart3: serial@...17200 {
uart4: serial@...17300 {
compatible = "spacemit,k1-uart", "intel,xscale-uart";
reg = <0x0 0xd4017300 0x0 0x100>;
+ clocks = <&syscon_apbc CLK_UART4>,
+ <&syscon_apbc CLK_UART4_BUS>;
+ clock-names = "core", "bus";
interrupts = <46>;
- clock-frequency = <14857000>;
reg-shift = <2>;
reg-io-width = <4>;
status = "disabled";
@@ -400,8 +408,10 @@ uart4: serial@...17300 {
uart5: serial@...17400 {
compatible = "spacemit,k1-uart", "intel,xscale-uart";
reg = <0x0 0xd4017400 0x0 0x100>;
+ clocks = <&syscon_apbc CLK_UART5>,
+ <&syscon_apbc CLK_UART5_BUS>;
+ clock-names = "core", "bus";
interrupts = <47>;
- clock-frequency = <14857000>;
reg-shift = <2>;
reg-io-width = <4>;
status = "disabled";
@@ -410,8 +420,10 @@ uart5: serial@...17400 {
uart6: serial@...17500 {
compatible = "spacemit,k1-uart", "intel,xscale-uart";
reg = <0x0 0xd4017500 0x0 0x100>;
+ clocks = <&syscon_apbc CLK_UART6>,
+ <&syscon_apbc CLK_UART6_BUS>;
+ clock-names = "core", "bus";
interrupts = <48>;
- clock-frequency = <14857000>;
reg-shift = <2>;
reg-io-width = <4>;
status = "disabled";
@@ -420,8 +432,10 @@ uart6: serial@...17500 {
uart7: serial@...17600 {
compatible = "spacemit,k1-uart", "intel,xscale-uart";
reg = <0x0 0xd4017600 0x0 0x100>;
+ clocks = <&syscon_apbc CLK_UART7>,
+ <&syscon_apbc CLK_UART7_BUS>;
+ clock-names = "core", "bus";
interrupts = <49>;
- clock-frequency = <14857000>;
reg-shift = <2>;
reg-io-width = <4>;
status = "disabled";
@@ -430,8 +444,10 @@ uart7: serial@...17600 {
uart8: serial@...17700 {
compatible = "spacemit,k1-uart", "intel,xscale-uart";
reg = <0x0 0xd4017700 0x0 0x100>;
+ clocks = <&syscon_apbc CLK_UART8>,
+ <&syscon_apbc CLK_UART8_BUS>;
+ clock-names = "core", "bus";
interrupts = <50>;
- clock-frequency = <14857000>;
reg-shift = <2>;
reg-io-width = <4>;
status = "disabled";
@@ -440,8 +456,10 @@ uart8: serial@...17700 {
uart9: serial@...17800 {
compatible = "spacemit,k1-uart", "intel,xscale-uart";
reg = <0x0 0xd4017800 0x0 0x100>;
+ clocks = <&syscon_apbc CLK_UART9>,
+ <&syscon_apbc CLK_UART9_BUS>;
+ clock-names = "core", "bus";
interrupts = <51>;
- clock-frequency = <14857000>;
reg-shift = <2>;
reg-io-width = <4>;
status = "disabled";
--
2.49.0
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