arm64: zynqmp: Create description for generic SC (vpk120-revB)

System controllers are pretty much the same on the all boards that's why
use autodetection based on i2c eeprom. This should end up with having only
one BSP for all SCs with only DT overlays to cover different i2c
structures.

All MIOs are fixed by the spec that's why not a problem to description
pinctrl setting.

Apart from eth phy reset, it also set proper phy delays.
The TI DP83867 PHY datasheet says:
T1: Post RESET stabilization time == 195us
T3: Hardware configuration pins transition to output drivers == 64us
T4: RESET pulse width == 1us
So with a little overhead set 'reset-assert-us' to 100us (T4) and
'reset-deassert-us' to 280us (T1+T3).

NOTE: The tuning of TI DP83867 phy reset delay is derived from linux
upstream commit: 5dbadc848259(arm64: dts: fsl: add support for Kontron
pitx-imx8m board).

i2c structure on Xilinx Versal evaluation platforms contain a lot of
devices but also connection to connectors like SFP. Because of this
complicated structure with also all level shifters, i2c muxes, etc. not all
devices are able to reliably work on 400kHz even if they are compatible
with this speed. That's why set i2c frequency to 100KHz to increase
reliability of the i2c bus.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/c8092340f92144f0cc9096194198f227015bc013.1695808407.git.michal.simek@amd.com

2 files changed, 431 insertions, 0 deletions

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index fbce328acaf..29c40d1c3b6 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -411,6 +411,7 @@ dtb-$(CONFIG_ARCH_ZYNQMP) += \
 	zynqmp-mini-emmc1.dtb			\
 	zynqmp-mini-nand.dtb			\
 	zynqmp-mini-qspi.dtb			\
+	zynqmp-sc-revB.dtb			\
 	zynqmp-sm-k24-revA.dtb			\
 	zynqmp-smk-k24-revA.dtb			\
 	zynqmp-sm-k26-revA.dtb			\
diff --git a/arch/arm/dts/zynqmp-sc-revB.dts b/arch/arm/dts/zynqmp-sc-revB.dts
new file mode 100644
index 00000000000..e0b554c9c54
--- /dev/null
+++ b/arch/arm/dts/zynqmp-sc-revB.dts
@@ -0,0 +1,430 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * dts file for Xilinx ZynqMP Generic System Controller
+ *
+ * (C) Copyright 2021 - 2022, Xilinx, Inc.
+ * (C) Copyright 2022 - 2023, Advanced Micro Devices, Inc.
+ *
+ * Michal Simek <michal.simek@amd.com>
+ */
+/dts-v1/;
+
+#include "zynqmp.dtsi"
+#include "zynqmp-clk-ccf.dtsi"
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/net/ti-dp83867.h>
+#include <dt-bindings/pinctrl/pinctrl-zynqmp.h>
+#include <dt-bindings/phy/phy.h>
+
+/ {
+	model = "ZynqMP Generic System Controller";
+	compatible = "xlnx,zynqmp-sc-revB", "xlnx,zynqmp-sc", "xlnx,zynqmp";
+
+	aliases {
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
+		mmc0 = &sdhci0;
+		mmc1 = &sdhci1;
+		nvmem0 = &eeprom;
+		rtc0 = &rtc;
+		serial0 = &uart0;
+		serial1 = &uart1;
+		serial2 = &dcc;
+		spi0 = &qspi;
+		spi1 = &spi0;
+		spi2 = &spi1;
+	};
+
+	chosen {
+		bootargs = "earlycon";
+		stdout-path = "serial1:115200n8";
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x0 0x0 0x80000000>;
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+		autorepeat;
+		fwuen {
+			label = "sw16";
+			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+			linux,code = <BTN_MISC>;
+			wakeup-source;
+			autorepeat;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		ds40-led {
+			label = "heartbeat";
+			gpios = <&gpio 7 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "heartbeat";
+		};
+		ds44-led {
+			label = "status";
+			gpios = <&gpio 8 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	si5332_2: si5332_2 { /* u42 */
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <26000000>;
+	};
+
+	pwm-fan {
+		compatible = "pwm-fan";
+		status = "okay";
+		pwms = <&ttc0 2 40000 1>;
+	};
+};
+
+&gpio {
+	status = "okay";
+	gpio-line-names = "QSPI_CLK", "QSPI_DQ1", "QSPI_DQ2", "QSPI_DQ3", "QSPI_DQ0", /* 0 - 4 */
+		"QSPI_CS_B", "", "LED1", "LED2", "", /* 5 - 9 */
+		"", "ZU4_TRIGGER", "FWUEN", "EMMC_DAT0", "EMMC_DAT1", /* 10 - 14 */
+		"EMMC_DAT2", "EMMC_DAT3", "EMMC_DAT4", "EMMC_DAT5", "EMMC_DAT6", /* 15 - 19 */
+		"EMMC_DAT7", "EMMC_CMD", "EMMC_CLK", "EMMC_RST_B", "I2C1_SCL", /* 20 - 24 */
+		"I2C1_SDA", "UART0_RXD", "UART0_TXD", "", "", /* 25 - 29 */
+		"", "", "", "", "I2C0_SCL", /* 30 - 34 */
+		"I2C0_SDA", "UART1_TXD", "UART1_RXD", "GEM_TX_CLK", "GEM_TX_D0", /* 35 - 39 */
+		"GEM_TX_D1", "GEM_TX_D2", "GEM_TX_D3", "GEM_TX_CTL", "GEM_RX_CLK", /* 40 - 44 */
+		"GEM_RX_D0", "GEM_RX_D1", "GEM_RX_D2", "GEM_RX_D3", "GEM_RX_CTL", /* 45 - 49 */
+		"GEM_MDC", "GEM_MDIO", "USB0_CLK", "USB0_DIR", "USB0_DATA2", /* 50 - 54 */
+		"USB0_NXT", "USB0_DATA0", "USB0_DATA1", "USB0_STP", "USB0_DATA3", /* 55 - 59 */
+		"USB0_DATA4", "USB0_DATA5", "USB0_DATA6", "USB0_DATA7", "", /* 60 - 64 */
+		"", "", "", "", "", /* 65 - 69 */
+		"", "", "", "", "", /* 70 - 74 */
+		"", "", "ETH_RESET_B", /* 75 - 77, MIO end and EMIO start */
+		"", "", /* 78 - 79 */
+		"", "", "", "", "", /* 80 - 84 */
+		"", "", "", "", "", /* 85 -89 */
+		"", "", "", "", "", /* 90 - 94 */
+		"", "", "", "", "", /* 95 - 99 */
+		"", "", "", "", "", /* 100 - 104 */
+		"", "", "", "", "", /* 105 - 109 */
+		"", "", "", "", "", /* 110 - 114 */
+		"", "", "", "", "", /* 115 - 119 */
+		"", "", "", "", "", /* 120 - 124 */
+		"", "", "", "", "", /* 125 - 129 */
+		"", "", "", "", "", /* 130 - 134 */
+		"", "", "", "", "", /* 135 - 139 */
+		"", "", "", "", "", /* 140 - 144 */
+		"", "", "", "", "", /* 145 - 149 */
+		"", "", "", "", "", /* 150 - 154 */
+		"", "", "", "", "", /* 155 - 159 */
+		"", "", "", "", "", /* 160 - 164 */
+		"", "", "", "", "", /* 165 - 169 */
+		"", "", "", ""; /* 170 - 173 */
+};
+
+&gem1 { /* gem1 MIO38-49, MDIO MIO50/51 */
+	status = "okay";
+	phy-mode = "rgmii-id";
+	phy-handle = <&phy0>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_gem1_default>;
+
+	mdio: mdio {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		phy0: ethernet-phy@1 {
+			#phy-cells = <1>;
+			compatible = "ethernet-phy-id2000.a231";
+			reg = <1>;
+			ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_25_NS>;
+			ti,tx-internal-delay = <DP83867_RGMIIDCTL_2_75_NS>;
+			ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
+			ti,dp83867-rxctrl-strap-quirk;
+			reset-gpios = <&gpio 77 GPIO_ACTIVE_LOW>;
+			reset-assert-us = <100>;
+			reset-deassert-us = <280>;
+		};
+	};
+};
+
+&i2c0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+	clock-frequency = <100000>;
+	pinctrl-names = "default", "gpio";
+	pinctrl-0 = <&pinctrl_i2c0_default>;
+	pinctrl-1 = <&pinctrl_i2c0_gpio>;
+	scl-gpios = <&gpio 34 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	sda-gpios = <&gpio 35 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+};
+
+&i2c1 { /* i2c1 MIO 24-25 */
+	status = "okay";
+	bootph-all;
+	clock-frequency = <100000>;
+	pinctrl-names = "default", "gpio";
+	pinctrl-0 = <&pinctrl_i2c1_default>;
+	pinctrl-1 = <&pinctrl_i2c1_gpio>;
+	scl-gpios = <&gpio 24 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	sda-gpios = <&gpio 25 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+
+	/* Use for storing information about SC board */
+	eeprom: eeprom@54 { /* u34 - m24128 16kB */
+		compatible = "st,24c128", "atmel,24c128";
+		reg = <0x54>; /* & 0x5c */
+		bootph-all;
+	};
+};
+
+/* USB 3.0 only */
+&psgtr {
+	status = "okay";
+	/* nc, nc, usb3 */
+	clocks = <&si5332_2>;
+	clock-names = "ref2";
+};
+
+&qspi { /* MIO 0-5 */
+	status = "okay";
+	/* QSPI should also have PINCTRL setup */
+	flash@0 {
+		compatible = "mt25qu512a", "m25p80", "jedec,spi-nor"; /* mt25qu512abb8e12 512Mib */
+		#address-cells = <1>;
+		#size-cells = <1>;
+		reg = <0>;
+		spi-tx-bus-width = <4>;
+		spi-rx-bus-width = <4>;
+		spi-max-frequency = <40000000>; /* 40MHz */
+		partition@0 {
+			label = "Image Selector";
+			reg = <0x0 0x80000>; /* 512KB */
+			read-only;
+			lock;
+		};
+		partition@80000 {
+			label = "Image Selector Golden";
+			reg = <0x80000 0x80000>; /* 512KB */
+			read-only;
+			lock;
+		};
+		partition@100000 {
+			label = "Persistent Register";
+			reg = <0x100000 0x20000>; /* 128KB */
+		};
+		partition@120000 {
+			label = "Persistent Register Backup";
+			reg = <0x120000 0x20000>; /* 128KB */
+		};
+		partition@140000 {
+			label = "Open_1";
+			reg = <0x140000 0xC0000>; /* 768KB */
+		};
+		partition@200000 {
+			label = "Image A (FSBL, PMU, ATF, U-Boot)";
+			reg = <0x200000 0xD00000>; /* 13MB */
+		};
+		partition@f00000 {
+			label = "ImgSel Image A Catch";
+			reg = <0xF00000 0x80000>; /* 512KB */
+			read-only;
+			lock;
+		};
+		partition@f80000 {
+			label = "Image B (FSBL, PMU, ATF, U-Boot)";
+			reg = <0xF80000 0xD00000>; /* 13MB */
+		};
+		partition@1c80000 {
+			label = "ImgSel Image B Catch";
+			reg = <0x1C80000 0x80000>; /* 512KB */
+			read-only;
+			lock;
+		};
+		partition@1d00000 {
+			label = "Open_2";
+			reg = <0x1D00000 0x100000>; /* 1MB */
+		};
+		partition@1e00000 {
+			label = "Recovery Image";
+			reg = <0x1E00000 0x200000>; /* 2MB */
+			read-only;
+			lock;
+		};
+		partition@2000000 {
+			label = "Recovery Image Backup";
+			reg = <0x2000000 0x200000>; /* 2MB */
+			read-only;
+			lock;
+		};
+		partition@2200000 {
+			label = "U-Boot storage variables";
+			reg = <0x2200000 0x20000>; /* 128KB */
+		};
+		partition@2220000 {
+			label = "U-Boot storage variables backup";
+			reg = <0x2220000 0x20000>; /* 128KB */
+		};
+		partition@2240000 {
+			label = "SHA256";
+			reg = <0x2240000 0x40000>; /* 256B but 256KB sector */
+			read-only;
+			lock;
+		};
+		partition@2280000 {
+			label = "Secure OS Storage";
+			reg = <0x2280000 0x20000>; /* 128KB */
+		};
+		partition@22A0000 {
+			label = "User";
+			reg = <0x22A0000 0x1d60000>; /* 29.375 MB */
+		};
+	};
+};
+
+&sdhci0 { /* emmc MIO 13-23 - with some settings MTFC16GAPALBH 16GB */
+	status = "okay";
+	non-removable;
+	disable-wp;
+	bus-width = <8>;
+	xlnx,mio-bank = <0>;
+};
+
+&ttc0 {
+	status = "okay";
+	#pwm-cells = <3>;
+};
+
+&uart1 { /* uart0 MIO36-37 */
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_uart1_default>;
+};
+
+&pinctrl0 { /* required by spec */
+	status = "okay";
+
+	pinctrl_uart1_default: uart1-default {
+		conf {
+			groups = "uart1_9_grp";
+			slew-rate = <SLEW_RATE_SLOW>;
+			power-source = <IO_STANDARD_LVCMOS18>;
+			drive-strength = <12>;
+		};
+
+		conf-rx {
+			pins = "MIO37";
+			bias-high-impedance;
+		};
+
+		conf-tx {
+			pins = "MIO36";
+			bias-disable;
+		};
+
+		mux {
+			groups = "uart1_9_grp";
+			function = "uart1";
+		};
+	};
+
+	pinctrl_i2c0_default: i2c0-default {
+		mux {
+			groups = "i2c0_8_grp";
+			function = "i2c0";
+		};
+
+		conf {
+			groups = "i2c0_8_grp";
+			bias-pull-up;
+			slew-rate = <SLEW_RATE_SLOW>;
+			power-source = <IO_STANDARD_LVCMOS18>;
+		};
+	};
+
+	pinctrl_i2c0_gpio: i2c0-gpio {
+		mux {
+			groups = "gpio0_34_grp", "gpio0_35_grp";
+			function = "gpio0";
+		};
+
+		conf {
+			groups = "gpio0_34_grp", "gpio0_35_grp";
+			slew-rate = <SLEW_RATE_SLOW>;
+			power-source = <IO_STANDARD_LVCMOS18>;
+		};
+	};
+
+	pinctrl_i2c1_default: i2c1-default {
+		conf {
+			groups = "i2c1_6_grp";
+			bias-pull-up;
+			slew-rate = <SLEW_RATE_SLOW>;
+			power-source = <IO_STANDARD_LVCMOS18>;
+		};
+
+		mux {
+			groups = "i2c1_6_grp";
+			function = "i2c1";
+		};
+	};
+
+	pinctrl_i2c1_gpio: i2c1-gpio {
+		conf {
+			groups = "gpio0_24_grp", "gpio0_25_grp";
+			slew-rate = <SLEW_RATE_SLOW>;
+			power-source = <IO_STANDARD_LVCMOS18>;
+		};
+
+		mux {
+			groups = "gpio0_24_grp", "gpio0_25_grp";
+			function = "gpio0";
+		};
+	};
+
+	pinctrl_gem1_default: gem1-default {
+		conf {
+			groups = "ethernet1_0_grp";
+			slew-rate = <SLEW_RATE_SLOW>;
+			power-source = <IO_STANDARD_LVCMOS18>;
+		};
+
+		conf-rx {
+			pins = "MIO44", "MIO46", "MIO48";
+			bias-high-impedance;
+			low-power-disable;
+		};
+
+		conf-bootstrap {
+			pins = "MIO45", "MIO47", "MIO49";
+			bias-disable;
+			low-power-disable;
+		};
+
+		conf-tx {
+			pins = "MIO38", "MIO39", "MIO40",
+				"MIO41", "MIO42", "MIO43";
+			bias-disable;
+			low-power-enable;
+		};
+
+		conf-mdio {
+			groups = "mdio1_0_grp";
+			slew-rate = <SLEW_RATE_SLOW>;
+			power-source = <IO_STANDARD_LVCMOS18>;
+			bias-disable;
+		};
+
+		mux-mdio {
+			function = "mdio1";
+			groups = "mdio1_0_grp";
+		};
+
+		mux {
+			function = "ethernet1";
+			groups = "ethernet1_0_grp";
+		};
+	};
+};