arm64: dts: imx93-kontron: set correct lpspi for eeram and assign clock

EERAM was assigned to an incorrect lpspi bus in device tree.

In this MR:

• fixed lpspi bus number for EERAM
• assigned clock and clock rate for the correct lpspi bus

Note: there is still an issue with dma setup:

[    2.213476] fsl_lpspi 42720000.spi: dma setup error -19, use pio

There are following commits in mainline kernel, that add dma support for lpspi and lpi2c:

commit cd6cb1fff35aa519b3cb2d53477b01fc0f1cf088
Author: Peng Fan <peng.fan@nxp.com>
Date:   Fri Apr 19 11:36:58 2024 +0800

    arm64: dts: imx93: add dma support for lpspi[1..8]
    
    Add dma support for lpspi[1..8]
    
    Signed-off-by: Peng Fan <peng.fan@nxp.com>
    Reviewed-by: Frank Li <Frank.Li@nxp.com>
    Signed-off-by: Shawn Guo <shawnguo@kernel.org>
    
commit 7eb9efd28f117b3f14d1c14794e4131075a4dc29
Author: Peng Fan <peng.fan@nxp.com>
Date:   Fri Apr 19 11:36:57 2024 +0800

    arm64: dts: imx93: add dma support for lpi2c[1..8]
    
    Add dma support for lpi2c[1..8].
    
    Signed-off-by: Peng Fan <peng.fan@nxp.com>
    Reviewed-by: Frank Li <Frank.Li@nxp.com>
    Signed-off-by: Shawn Guo <shawnguo@kernel.org>

commit 76c54d53aaa0c349442764c0f639450a05089707
Author: Peng Fan <peng.fan@nxp.com>
Date:   Fri Apr 19 11:36:56 2024 +0800

    arm64: dts: imx93: use FSL_EDMA_RX for rx channel
    
    Use FSL_EDMA_RX for dma rx channel bitmask, which is intuitive.
    
    Signed-off-by: Peng Fan <peng.fan@nxp.com>
    Reviewed-by: Frank Li <Frank.Li@nxp.com>
    Signed-off-by: Shawn Guo <shawnguo@kernel.org>

But EERAM stops working with them:

root@kontron-mx93:~# cp /dev/mtdblock0 mtd1
[   50.878707] fsl_lpspi 42720000.spi: I/O Error in DMA TX
[   50.886702] mchp48l640 spi0.0: SPI transfer failed: -110
[   50.894724] spi_master spi0: failed to transfer one message from queue
[   50.906875] spi_master spi0: noqueue transfer failed
[   50.912009] I/O error, dev mtdblock0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 2 prio class 0
[   52.958724] fsl_lpspi 42720000.spi: I/O Error in DMA TX
[   52.966702] mchp48l640 spi0.0: SPI transfer failed: -110
[   52.974721] spi_master spi0: failed to transfer one message from queue
[   52.986869] spi_master spi0: noqueue transfer failed
[   52.992000] I/O error, dev mtdblock0, sector 8 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
[   55.042702] fsl_lpspi 42720000.spi: I/O Error in DMA TX
[   55.047969] mchp48l640 spi0.0: SPI transfer failed: -110
[   55.053310] spi_master spi0: failed to transfer one message from queue
[   55.059852] spi_master spi0: noqueue transfer failed
[   55.064841] I/O error, dev mtdblock0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[   55.073514] Buffer I/O error on dev mtdblock0, logical block 0, async page read
cp: error reading '/dev/mtdblock0': Input/output error
root@kontron-mx93:~# 

So due to the following reasons I decided not to apply them for now:

• while it may be an issue with lpspi8 only (NXP imx93-14x14-evk-sja1105 removes dma for lpspi8), we can`t really test if DMA support is working for other busses
• EERAM already works without DMA

arch/arm64/boot/dts/freescale/imx93-kontron-bl-osm-s.dts

+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Copyright (C) 2024 Kontron Electronics GmbH
+ */
+
+/dts-v1/;
+
+#include "imx93-kontron-osm-s.dtsi"
+
+/ {
+	model = "Kontron BL i.MX93 OSM-S";
+	compatible = "kontron,imx93-bl-osm-s", "kontron,imx93-osm-s", "fsl,imx93";
+
+	aliases {
+		ethernet0 = &fec;
+		ethernet1 = &eqos;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led1 {
+			label = "led1";
+			gpios = <&gpio1 5 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "heartbeat";
+		};
+	};
+
+	pwm-beeper {
+		compatible = "pwm-beeper";
+		pwms = <&tpm6 0 5000 0>;
+	};
+
+	reg_vcc_panel: regulator-vcc-panel {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		gpio = <&gpio4 3 GPIO_ACTIVE_HIGH>;
+		regulator-max-microvolt = <3300000>;
+		regulator-min-microvolt = <3300000>;
+		regulator-name = "VCC_PANEL";
+	};
+};
+
+&lpspi8 {
+	status = "okay";
+	assigned-clocks = <&clk IMX93_CLK_LPSPI8>;
+	assigned-clock-parents = <&clk IMX93_CLK_SYS_PLL_PFD0_DIV2>;
+	assigned-clock-rates = <100000000>;
+
+	eeram@0 {
+		compatible = "microchip,48l640";
+		reg = <0>;
+		spi-max-frequency = <20000000>;
+	};
+};
+
+&eqos {	/* Second ethernet (OSM-S ETH_B) */
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_eqos_rgmii>;
+	phy-connection-type = "rgmii-id";
+	phy-handle = <&ethphy1>;
+	status = "okay";
+
+	mdio {
+		compatible = "snps,dwmac-mdio";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ethphy1: ethernet-phy@1 {
+			compatible = "ethernet-phy-id4f51.e91b",
+			             "ethernet-phy-ieee802.3-c22";
+			reg = <1>;
+			reset-assert-us = <10000>;
+			reset-gpios = <&gpio1 9 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&fec { /* First ethernet (OSM-S ETH_A) */
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_enet_rgmii>;
+	phy-connection-type = "rgmii-id";
+	phy-handle = <&ethphy0>;
+	status = "okay";
+
+	mdio {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ethphy0: ethernet-phy@1 {
+			compatible = "ethernet-phy-id4f51.e91b",
+			             "ethernet-phy-ieee802.3-c22";
+			reg = <1>;
+			reset-assert-us = <10000>;
+			reset-gpios = <&gpio2 18 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&flexcan1 {
+	status = "okay";
+};
+
+&lpi2c2 {
+	status = "okay";
+
+	gpio_expander_dio: gpio@20 {
+		compatible = "ti,tca6408";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names = "DIO1_OUT","DIO1_IN", "DIO2_OUT","DIO2_IN",
+				  "DIO3_OUT","DIO3_IN", "DIO4_OUT","DIO4_IN";
+		interrupt-parent = <&gpio4>;
+		interrupts = <28 IRQ_TYPE_EDGE_FALLING>;
+		reset-gpios = <&gpio2 2 GPIO_ACTIVE_LOW>;
+	};
+};
+
+&lpuart1 {
+	status = "okay";
+};
+
+&lpuart7 {
+	uart-has-rtscts;
+	status = "okay";
+};
+
+&lpuart6 {
+	linux,rs485-enabled-at-boot-time;
+	uart-has-rtscts;
+	status = "okay";
+};
+
+&tpm6 {
+	status = "okay";
+};
+
+&usbotg1 {
+	disable-over-current;
+	dr_mode = "host";
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	usb1@1 {
+		compatible = "usb424,2514";
+		reg = <1>;
+	};
+};
+
+&usbotg2 {
+	adp-disable;
+	hnp-disable;
+	srp-disable;
+
+	dr_mode = "otg";
+	usb-role-switch;
+	status = "okay";
+
+	connector {
+		compatible = "gpio-usb-b-connector", "usb-b-connector";
+		label = "Type-C";
+		type = "micro";
+	};
+};
+
+&usdhc2 {
+	vmmc-supply = <&reg_vdd_3v3>;
+	status = "okay";
+};