linux-kernel - [PATCH v6 4/4] riscv: dts: add clock generator for Sophgo SG2042 SoC

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Date:   Fri,  8 Dec 2023 09:15:08 +0800
From:   Chen Wang <unicornxw@...il.com>
To:     aou@...s.berkeley.edu, chao.wei@...hgo.com, conor@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, mturquette@...libre.com,
        palmer@...belt.com, paul.walmsley@...ive.com,
        richardcochran@...il.com, robh+dt@...nel.org, sboyd@...nel.org,
        devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
        haijiao.liu@...hgo.com, xiaoguang.xing@...hgo.com,
        guoren@...nel.org, jszhang@...nel.org, inochiama@...look.com,
        samuel.holland@...ive.com
Cc:     Chen Wang <unicorn_wang@...look.com>
Subject: [PATCH v6 4/4] riscv: dts: add clock generator for Sophgo SG2042 SoC

From: Chen Wang <unicorn_wang@...look.com>

Add clock generator node to device tree for SG2042, and enable clock for
uart.

Signed-off-by: Chen Wang <unicorn_wang@...look.com>
---
 .../boot/dts/sophgo/sg2042-milkv-pioneer.dts  |  4 +
 arch/riscv/boot/dts/sophgo/sg2042.dtsi        | 79 +++++++++++++++++++
 2 files changed, 83 insertions(+)

diff --git a/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts b/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts
index 49b4b9c2c101..0b3b3b2b0c64 100644
--- a/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts
+++ b/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dts
@@ -14,6 +14,10 @@ chosen {
 	};
 };
 
+&cgi {
+	clock-frequency = <25000000>;
+};
+
 &uart0 {
 	status = "okay";
 };
diff --git a/arch/riscv/boot/dts/sophgo/sg2042.dtsi b/arch/riscv/boot/dts/sophgo/sg2042.dtsi
index 93256540d078..f08c41dda216 100644
--- a/arch/riscv/boot/dts/sophgo/sg2042.dtsi
+++ b/arch/riscv/boot/dts/sophgo/sg2042.dtsi
@@ -5,6 +5,7 @@
 
 /dts-v1/;
 #include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/clock/sophgo,sg2042-clkgen.h>
 
 #include "sg2042-cpus.dtsi"
 
@@ -18,6 +19,12 @@ aliases {
 		serial0 = &uart0;
 	};
 
+	cgi: oscillator {
+		compatible = "fixed-clock";
+		clock-output-names = "cgi";
+		#clock-cells = <0>;
+	};
+
 	soc: soc {
 		compatible = "simple-bus";
 		#address-cells = <2>;
@@ -311,12 +318,84 @@ intc: interrupt-controller@...0000000 {
 			riscv,ndev = <224>;
 		};
 
+		sys_ctrl: system-controller@...0010000 {
+			compatible = "sophgo,sg2042-sysctrl";
+			reg = <0x70 0x30010000 0x0 0x1000>;
+		};
+
+		clkgen: clock-controller@...0012000 {
+			compatible = "sophgo,sg2042-clkgen";
+			reg = <0x70 0x30012000 0x0 0x1000>;
+			sophgo,system-ctrl = <&sys_ctrl>;
+			#clock-cells = <1>;
+			clocks = <&cgi>;
+			assigned-clocks = \
+				<&clkgen DIV_CLK_FPLL_RP_CPU_NORMAL_1>,
+				<&clkgen DIV_CLK_FPLL_50M_A53>,
+				<&clkgen DIV_CLK_FPLL_TOP_RP_CMN_DIV2>,
+				<&clkgen DIV_CLK_FPLL_UART_500M>,
+				<&clkgen DIV_CLK_FPLL_AHB_LPC>,
+				<&clkgen DIV_CLK_FPLL_EFUSE>,
+				<&clkgen DIV_CLK_FPLL_TX_ETH0>,
+				<&clkgen DIV_CLK_FPLL_PTP_REF_I_ETH0>,
+				<&clkgen DIV_CLK_FPLL_REF_ETH0>,
+				<&clkgen DIV_CLK_FPLL_EMMC>,
+				<&clkgen DIV_CLK_FPLL_SD>,
+				<&clkgen DIV_CLK_FPLL_TOP_AXI0>,
+				<&clkgen DIV_CLK_FPLL_TOP_AXI_HSPERI>,
+				<&clkgen DIV_CLK_FPLL_AXI_DDR_1>,
+				<&clkgen DIV_CLK_FPLL_DIV_TIMER1>,
+				<&clkgen DIV_CLK_FPLL_DIV_TIMER2>,
+				<&clkgen DIV_CLK_FPLL_DIV_TIMER3>,
+				<&clkgen DIV_CLK_FPLL_DIV_TIMER4>,
+				<&clkgen DIV_CLK_FPLL_DIV_TIMER5>,
+				<&clkgen DIV_CLK_FPLL_DIV_TIMER6>,
+				<&clkgen DIV_CLK_FPLL_DIV_TIMER7>,
+				<&clkgen DIV_CLK_FPLL_DIV_TIMER8>,
+				<&clkgen DIV_CLK_FPLL_100K_EMMC>,
+				<&clkgen DIV_CLK_FPLL_100K_SD>,
+				<&clkgen DIV_CLK_FPLL_GPIO_DB>,
+				<&clkgen DIV_CLK_MPLL_RP_CPU_NORMAL_0>,
+				<&clkgen DIV_CLK_MPLL_AXI_DDR_0>;
+			assigned-clock-rates = \
+				<2000000000>,
+				<50000000>,
+				<1000000000>,
+				<500000000>,
+				<200000000>,
+				<25000000>,
+				<125000000>,
+				<50000000>,
+				<25000000>,
+				<100000000>,
+				<100000000>,
+				<100000000>,
+				<250000000>,
+				<1000000000>,
+				<50000000>,
+				<50000000>,
+				<50000000>,
+				<50000000>,
+				<50000000>,
+				<50000000>,
+				<50000000>,
+				<50000000>,
+				<100000>,
+				<100000>,
+				<100000>,
+				<2000000000>,
+				<1000000000>;
+		};
+
 		uart0: serial@...0000000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0x00000070 0x40000000 0x00000000 0x00001000>;
 			interrupt-parent = <&intc>;
 			interrupts = <112 IRQ_TYPE_LEVEL_HIGH>;
 			clock-frequency = <500000000>;
+			clocks = <&clkgen GATE_CLK_UART_500M>,
+				 <&clkgen GATE_CLK_APB_UART>;
+			clock-names = "baudclk", "apb_pclk";
 			reg-shift = <2>;
 			reg-io-width = <4>;
 			status = "disabled";
-- 
2.25.1