openwrt/target/linux/bcm27xx/patches-6.6/950-0928-DT-rp1-add-general-purpose-clock-source-definitions.patch

From ff527efdd7a2d32b591f22178e9c4e221301efa2 Mon Sep 17 00:00:00 2001
From: Jonathan Bell <jonathan@raspberrypi.com>
Date: Tue, 5 Mar 2024 14:32:46 +0000
Subject: [PATCH 0928/1085] DT: rp1: add general-purpose clock source
 definitions

GPCLKs have two parts - a clock divider and a clock input, routed out to
and in from a GPIO pad respectively. It follows that the clksrc_gpN
inputs can't be used unless the pad is also configured as a GPCLK, so
leave them disabled.

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
---
 arch/arm/boot/dts/broadcom/rp1.dtsi | 90 +++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)

--- a/arch/arm/boot/dts/broadcom/rp1.dtsi
+++ b/arch/arm/boot/dts/broadcom/rp1.dtsi
@@ -858,6 +858,36 @@
 				bias-disable;
 			};
 
+			rp1_gpclksrc0_gpio4: rp1_gpclksrc0_gpio4 {
+				function = "gpclk0";
+				pins = "gpio4";
+				bias-disable;
+			};
+
+			rp1_gpclksrc0_gpio20: rp1_gpclksrc0_gpio20 {
+				function = "gpclk0";
+				pins = "gpio20";
+				bias-disable;
+			};
+
+			rp1_gpclksrc1_gpio5: rp1_gpclksrc1_gpio5 {
+				function = "gpclk1";
+				pins = "gpio5";
+				bias-disable;
+			};
+
+			rp1_gpclksrc1_gpio18: rp1_gpclksrc1_gpio18 {
+				function = "gpclk1";
+				pins = "gpio18";
+				bias-disable;
+			};
+
+			rp1_gpclksrc1_gpio21: rp1_gpclksrc1_gpio21 {
+				function = "gpclk1";
+				pins = "gpio21";
+				bias-disable;
+			};
+
 			rp1_pwm1_gpio45: rp1_pwm1_gpio45 {
 				function = "pwm1";
 				pins = "gpio45";
@@ -1203,6 +1233,66 @@
 		clock-output-names = "clksrc_mipi1_dsi_byteclk";
 		clock-frequency = <72000000>;
 	};
+	/* GPIO derived clock sources. Each GPIO with a GPCLK function
+	 * can drive its output from the respective GPCLK
+	 * generator, and provide a clock source to other internal
+	 * dividers. Add dummy sources here so that they can be overridden
+	 * with overlays.
+	 */
+	clksrc_gp0: clksrc_gp0 {
+		status = "disabled";
+		compatible = "fixed-factor-clock";
+		#clock-cells = <0>;
+		clock-div = <1>;
+		clock-mult = <1>;
+		clocks = <&rp1_clocks RP1_CLK_GP0>;
+		clock-output-names = "clksrc_gp0";
+	};
+	clksrc_gp1: clksrc_gp1 {
+		status = "disabled";
+		compatible = "fixed-factor-clock";
+		#clock-cells = <0>;
+		clock-div = <1>;
+		clock-mult = <1>;
+		clocks = <&rp1_clocks RP1_CLK_GP1>;
+		clock-output-names = "clksrc_gp1";
+	};
+	clksrc_gp2: clksrc_gp2 {
+		status = "disabled";
+		compatible = "fixed-factor-clock";
+		clock-div = <1>;
+		clock-mult = <1>;
+		#clock-cells = <0>;
+		clocks = <&rp1_clocks RP1_CLK_GP2>;
+		clock-output-names = "clksrc_gp2";
+	};
+	clksrc_gp3: clksrc_gp3 {
+		status = "disabled";
+		compatible = "fixed-factor-clock";
+		clock-div = <1>;
+		clock-mult = <1>;
+		#clock-cells = <0>;
+		clocks = <&rp1_clocks RP1_CLK_GP3>;
+		clock-output-names = "clksrc_gp3";
+	};
+	clksrc_gp4: clksrc_gp4 {
+		status = "disabled";
+		compatible = "fixed-factor-clock";
+		#clock-cells = <0>;
+		clock-div = <1>;
+		clock-mult = <1>;
+		clocks = <&rp1_clocks RP1_CLK_GP4>;
+		clock-output-names = "clksrc_gp4";
+	};
+	clksrc_gp5: clksrc_gp5 {
+		status = "disabled";
+		compatible = "fixed-factor-clock";
+		#clock-cells = <0>;
+		clock-div = <1>;
+		clock-mult = <1>;
+		clocks = <&rp1_clocks RP1_CLK_GP5>;
+		clock-output-names = "clksrc_gp5";
+	};
 };
 
 / {