MIPS: mobileye: eyeq5: add OLB system-controller node

The OLB ("Other Logic Block") is a system-controller region hosting
clock, reset and pin controllers. It contains registers such as I2C
speed mode that need to be accessible by other nodes.

Remove fixed-clocks previously used; replace references.
Add parent crystal clock, fixed at 30MHz.
Add pin nodes for all functions.
Add mobileye,eyeq5-olb compatible node, hosting clk, reset and pinctrl.
Add reset and pinctrl references to UART nodes.
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/boot/dts/mobileye/eyeq5-fixed-clocks.dtsi → arch/mips/boot/dts/mobileye/eyeq5-clocks.dtsi

@@ -3,42 +3,20 @@
  * Copyright 2023 Mobileye Vision Technologies Ltd.
  */
 
+#include <dt-bindings/clock/mobileye,eyeq5-clk.h>
+
 / {
 	/* Fixed clock */
-	pll_cpu: pll-cpu {
-		compatible = "fixed-clock";
-		#clock-cells = <0>;
-		clock-frequency = <1500000000>;
-	};
-
-	pll_vdi: pll-vdi {
-		compatible = "fixed-clock";
-		#clock-cells = <0>;
-		clock-frequency = <1280000000>;
-	};
-
-	pll_per: pll-per {
-		compatible = "fixed-clock";
-		#clock-cells = <0>;
-		clock-frequency = <2000000000>;
-	};
-
-	pll_ddr0: pll-ddr0 {
-		compatible = "fixed-clock";
-		#clock-cells = <0>;
-		clock-frequency = <1857210000>;
-	};
-
-	pll_ddr1: pll-ddr1 {
+	xtal: xtal {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
-		clock-frequency = <1857210000>;
+		clock-frequency = <30000000>;
 	};
 
 /* PLL_CPU derivatives */
 	occ_cpu: occ-cpu {
 		compatible = "fixed-factor-clock";
-		clocks = <&pll_cpu>;
+		clocks = <&olb EQ5C_PLL_CPU>;
 		#clock-cells = <0>;
 		clock-div = <1>;
 		clock-mult = <1>;
@@ -101,7 +79,7 @@ mem_clk: mem-clk {
 	};
 	occ_isram: occ-isram {
 		compatible = "fixed-factor-clock";
-		clocks = <&pll_cpu>;
+		clocks = <&olb EQ5C_PLL_CPU>;
 		#clock-cells = <0>;
 		clock-div = <2>;
 		clock-mult = <1>;
@@ -115,7 +93,7 @@ isram_clk: isram-clk { /* gate ClkRstGen_isram */
 	};
 	occ_dbu: occ-dbu {
 		compatible = "fixed-factor-clock";
-		clocks = <&pll_cpu>;
+		clocks = <&olb EQ5C_PLL_CPU>;
 		#clock-cells = <0>;
 		clock-div = <10>;
 		clock-mult = <1>;
@@ -130,7 +108,7 @@ si_dbu_tp_pclk: si-dbu-tp-pclk { /* gate ClkRstGen_dbu */
 /* PLL_VDI derivatives */
 	occ_vdi: occ-vdi {
 		compatible = "fixed-factor-clock";
-		clocks = <&pll_vdi>;
+		clocks = <&olb EQ5C_PLL_VDI>;
 		#clock-cells = <0>;
 		clock-div = <2>;
 		clock-mult = <1>;
@@ -144,7 +122,7 @@ vdi_clk: vdi-clk { /* gate ClkRstGen_vdi */
 	};
 	occ_can_ser: occ-can-ser {
 		compatible = "fixed-factor-clock";
-		clocks = <&pll_vdi>;
+		clocks = <&olb EQ5C_PLL_VDI>;
 		#clock-cells = <0>;
 		clock-div = <16>;
 		clock-mult = <1>;
@@ -158,7 +136,7 @@ can_ser_clk: can-ser-clk { /* gate ClkRstGen_can_ser */
 	};
 	i2c_ser_clk: i2c-ser-clk {
 		compatible = "fixed-factor-clock";
-		clocks = <&pll_vdi>;
+		clocks = <&olb EQ5C_PLL_VDI>;
 		#clock-cells = <0>;
 		clock-div = <20>;
 		clock-mult = <1>;
@@ -166,7 +144,7 @@ i2c_ser_clk: i2c-ser-clk {
 /* PLL_PER derivatives */
 	occ_periph: occ-periph {
 		compatible = "fixed-factor-clock";
-		clocks = <&pll_per>;
+		clocks = <&olb EQ5C_PLL_PER>;
 		#clock-cells = <0>;
 		clock-div = <16>;
 		clock-mult = <1>;
@@ -225,7 +203,7 @@ gpio_clk: gpio-clk {
 	};
 	emmc_sys_clk: emmc-sys-clk {
 		compatible = "fixed-factor-clock";
-		clocks = <&pll_per>;
+		clocks = <&olb EQ5C_PLL_PER>;
 		#clock-cells = <0>;
 		clock-div = <10>;
 		clock-mult = <1>;
@@ -233,7 +211,7 @@ emmc_sys_clk: emmc-sys-clk {
 	};
 	ccf_ctrl_clk: ccf-ctrl-clk {
 		compatible = "fixed-factor-clock";
-		clocks = <&pll_per>;
+		clocks = <&olb EQ5C_PLL_PER>;
 		#clock-cells = <0>;
 		clock-div = <4>;
 		clock-mult = <1>;
@@ -241,7 +219,7 @@ ccf_ctrl_clk: ccf-ctrl-clk {
 	};
 	occ_mjpeg_core: occ-mjpeg-core {
 		compatible = "fixed-factor-clock";
-		clocks = <&pll_per>;
+		clocks = <&olb EQ5C_PLL_PER>;
 		#clock-cells = <0>;
 		clock-div = <2>;
 		clock-mult = <1>;
@@ -265,7 +243,7 @@ mjpeg_core_clk: mjpeg-core-clk { /* gate ClkRstGen_mjpeg_gen */
 	};
 	fcmu_a_clk: fcmu-a-clk {
 		compatible = "fixed-factor-clock";
-		clocks = <&pll_per>;
+		clocks = <&olb EQ5C_PLL_PER>;
 		#clock-cells = <0>;
 		clock-div = <20>;
 		clock-mult = <1>;
@@ -273,7 +251,7 @@ fcmu_a_clk: fcmu-a-clk {
 	};
 	occ_pci_sys: occ-pci-sys {
 		compatible = "fixed-factor-clock";
-		clocks = <&pll_per>;
+		clocks = <&olb EQ5C_PLL_PER>;
 		#clock-cells = <0>;
 		clock-div = <8>;
 		clock-mult = <1>;

arch/mips/boot/dts/mobileye/eyeq5-pins.dtsi

+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
+/*
+ * Default pin configuration for Mobileye EyeQ5 boards. We mostly create one
+ * pin configuration node per function.
+ */
+
+&olb {
+	timer0_pins: timer0-pins {
+		function = "timer0";
+		pins = "PA0", "PA1";
+	};
+	timer1_pins: timer1-pins {
+		function = "timer1";
+		pins = "PA2", "PA3";
+	};
+	timer2_pins: timer2-pins {
+		function = "timer2";
+		pins = "PA4", "PA5";
+	};
+	pps0_pins: pps0-pin {
+		function = "timer2";
+		pins = "PA4";
+	};
+	pps1_pins: pps1-pin {
+		function = "timer2";
+		pins = "PA5";
+	};
+	timer5_ext_pins: timer5-ext-pins {
+		function = "timer5";
+		pins = "PA6", "PA7", "PA8", "PA9";
+	};
+	timer5_ext_input_pins: timer5-ext-input-pins {
+		function = "timer5";
+		pins = "PA6", "PA7";
+	};
+	timer5_ext_incap_a_pins: timer5-ext-incap-a-pin {
+		function = "timer5";
+		pins = "PA6";
+	};
+	timer5_ext_incap_b_pins: timer5-ext-incap-b-pin {
+		function = "timer5";
+		pins = "PA7";
+	};
+	can0_pins: can0-pins {
+		function = "can0";
+		pins = "PA14", "PA15";
+	};
+	can1_pins: can1-pins {
+		function = "can1";
+		pins = "PA16", "PA17";
+	};
+	uart0_pins: uart0-pins {
+		function = "uart0";
+		pins = "PA10", "PA11";
+	};
+	uart1_pins: uart1-pins {
+		function = "uart1";
+		pins = "PA12", "PA13";
+	};
+	spi0_pins: spi0-pins {
+		function = "spi0";
+		pins = "PA18", "PA19", "PA20", "PA21", "PA22";
+	};
+	spi1_pins: spi1-pins {
+		function = "spi1";
+		pins = "PA23", "PA24", "PA25", "PA26", "PA27";
+	};
+	spi1_slave_pins: spi1-slave-pins {
+		function = "spi1";
+		pins = "PA24", "PA25", "PA26";
+	};
+	refclk0_pins: refclk0-pin {
+		function = "refclk0";
+		pins = "PA28";
+	};
+	timer3_pins: timer3-pins {
+		function = "timer3";
+		pins = "PB0", "PB1";
+	};
+	timer4_pins: timer4-pins {
+		function = "timer4";
+		pins = "PB2", "PB3";
+	};
+	timer6_ext_pins: timer6-ext-pins {
+		function = "timer6";
+		pins = "PB4", "PB5", "PB6", "PB7";
+	};
+	timer6_ext_input_pins: timer6-ext-input-pins {
+		function = "timer6";
+		pins = "PB4", "PB5";
+	};
+	timer6_ext_incap_a_pins: timer6-ext-incap-a-pin {
+		function = "timer6";
+		pins = "PB4";
+	};
+	timer6_ext_incap_b_pins: timer6-ext-incap-b-pin {
+		function = "timer6";
+		pins = "PB5";
+	};
+	can2_pins: can2-pins {
+		function = "can2";
+		pins = "PB10", "PB11";
+	};
+	uart2_pins: uart2-pins {
+		function = "uart2";
+		pins = "PB8", "PB9";
+	};
+	spi2_pins: spi2-pins {
+		function = "spi2";
+		pins = "PB12", "PB13", "PB14", "PB15", "PB16";
+	};
+	spi3_pins: spi3-pins {
+		function = "spi3";
+		pins = "PB17", "PB18", "PB19", "PB20", "PB21";
+	};
+	spi3_slave_pins: spi3-slave-pins {
+		function = "spi3";
+		pins = "PB18", "PB19", "PB20";
+	};
+	mclk0_pins: mclk0-pin {
+		function = "mclk0";
+		pins = "PB22";
+	};
+};

arch/mips/boot/dts/mobileye/eyeq5.dtsi

@@ -5,7 +5,7 @@
 
 #include <dt-bindings/interrupt-controller/mips-gic.h>
 
-#include "eyeq5-fixed-clocks.dtsi"
+#include "eyeq5-clocks.dtsi"
 
 / {
 	#address-cells = <2>;
@@ -78,6 +78,9 @@ uart0: serial@800000 {
 			interrupts = <GIC_SHARED 6 IRQ_TYPE_LEVEL_HIGH>;
 			clocks  = <&uart_clk>, <&occ_periph>;
 			clock-names = "uartclk", "apb_pclk";
+			resets = <&olb 0 10>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&uart0_pins>;
 		};
 
 		uart1: serial@900000 {
@@ -88,6 +91,9 @@ uart1: serial@900000 {
 			interrupts = <GIC_SHARED 6 IRQ_TYPE_LEVEL_HIGH>;
 			clocks  = <&uart_clk>, <&occ_periph>;
 			clock-names = "uartclk", "apb_pclk";
+			resets = <&olb 0 11>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&uart1_pins>;
 		};
 
 		uart2: serial@a00000 {
@@ -98,6 +104,18 @@ uart2: serial@a00000 {
 			interrupts = <GIC_SHARED 6 IRQ_TYPE_LEVEL_HIGH>;
 			clocks  = <&uart_clk>, <&occ_periph>;
 			clock-names = "uartclk", "apb_pclk";
+			resets = <&olb 0 12>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&uart2_pins>;
+		};
+
+		olb: system-controller@e00000 {
+			compatible = "mobileye,eyeq5-olb", "syscon";
+			reg = <0 0xe00000 0x0 0x400>;
+			#reset-cells = <2>;
+			#clock-cells = <1>;
+			clocks = <&xtal>;
+			clock-names = "ref";
 		};
 
 		gic: interrupt-controller@140000 {
@@ -122,3 +140,5 @@ timer {
 		};
 	};
 };
+
+#include "eyeq5-pins.dtsi"