armv8: ls1046aqds: add lpuart support

LPUART0 is used by default, and it's using platform clock.

Signed-off-by: Shaohui Xie <Shaohui.Xie@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

arch/arm/dts/Makefile

@@ -151,6 +151,7 @@ dtb-$(CONFIG_FSL_LSCH2) += fsl-ls1043a-qds-duart.dtb \
 	fsl-ls1043a-qds-lpuart.dtb \
 	fsl-ls1043a-rdb.dtb \
 	fsl-ls1046a-qds-duart.dtb \
+	fsl-ls1046a-qds-lpuart.dtb \
 	fsl-ls1046a-rdb.dtb \
 	fsl-ls1012a-qds.dtb \
 	fsl-ls1012a-rdb.dtb \

arch/arm/dts/fsl-ls1046a-qds-lpuart.dts

@@ -0,0 +1,16 @@
+/*
+ * Device Tree file for Freescale Layerscape-1046A family SoC.
+ *
+ * Copyright (C) 2016, Freescale Semiconductor
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/dts-v1/;
+#include "fsl-ls1046a-qds.dtsi"
+
+/ {
+       chosen {
+               stdout-path = &lpuart0;
+       };
+};

arch/arm/dts/fsl-ls1046a-qds.dtsi

@@ -75,3 +75,7 @@
 &duart1 {
 	status = "okay";
 };
+
+&lpuart0 {
+	status = "okay";
+};

arch/arm/dts/fsl-ls1046a.dtsi

@@ -151,6 +151,60 @@
 			clocks = <&clockgen 4 0>;
 		};
 
+		lpuart0: serial@2950000 {
+			compatible = "fsl,ls1021a-lpuart";
+			reg = <0x0 0x2950000 0x0 0x1000>;
+			interrupts = <0 48 0x4>;
+			clocks = <&clockgen 4 0>;
+			clock-names = "ipg";
+			status = "disabled";
+		};
+
+		lpuart1: serial@2960000 {
+			compatible = "fsl,ls1021a-lpuart";
+			reg = <0x0 0x2960000 0x0 0x1000>;
+			interrupts = <0 49 0x4>;
+			clocks = <&clockgen 4 1>;
+			clock-names = "ipg";
+			status = "disabled";
+		};
+
+		lpuart2: serial@2970000 {
+			compatible = "fsl,ls1021a-lpuart";
+			reg = <0x0 0x2970000 0x0 0x1000>;
+			interrupts = <0 50 0x4>;
+			clocks = <&clockgen 4 1>;
+			clock-names = "ipg";
+			status = "disabled";
+		};
+
+		lpuart3: serial@2980000 {
+			compatible = "fsl,ls1021a-lpuart";
+			reg = <0x0 0x2980000 0x0 0x1000>;
+			interrupts = <0 51 0x4>;
+			clocks = <&clockgen 4 1>;
+			clock-names = "ipg";
+			status = "disabled";
+		};
+
+		lpuart4: serial@2990000 {
+			compatible = "fsl,ls1021a-lpuart";
+			reg = <0x0 0x2990000 0x0 0x1000>;
+			interrupts = <0 52 0x4>;
+			clocks = <&clockgen 4 1>;
+			clock-names = "ipg";
+			status = "disabled";
+		};
+
+		lpuart5: serial@29a0000 {
+			compatible = "fsl,ls1021a-lpuart";
+			reg = <0x0 0x29a0000 0x0 0x1000>;
+			interrupts = <0 53 0x4>;
+			clocks = <&clockgen 4 1>;
+			clock-names = "ipg";
+			status = "disabled";
+		};
+
 		qspi: quadspi@1550000 {
 			compatible = "fsl,vf610-qspi";
 			#address-cells = <1>;

board/freescale/ls1046aqds/ls1046aqds.c

@@ -120,6 +120,13 @@ unsigned long get_board_ddr_clk(void)
 	return 66666666;
 }
 
+#ifdef CONFIG_LPUART
+u32 get_lpuart_clk(void)
+{
+	return gd->bus_clk;
+}
+#endif
+
 int select_i2c_ch_pca9547(u8 ch)
 {
 	int ret;
@@ -157,6 +164,9 @@ int board_early_init_f(void)
 	struct ccsr_scfg *scfg = (struct ccsr_scfg *)CONFIG_SYS_FSL_SCFG_ADDR;
 	u32 usb_pwrfault;
 #endif
+#ifdef CONFIG_LPUART
+	u8 uart;
+#endif
 
 #ifdef CONFIG_SYS_I2C_EARLY_INIT
 	i2c_early_init_f();
@@ -175,6 +185,14 @@ int board_early_init_f(void)
 	out_be32(&scfg->usbpwrfault_selcr, usb_pwrfault);
 #endif
 
+#ifdef CONFIG_LPUART
+	/* We use lpuart0 as system console */
+	uart = QIXIS_READ(brdcfg[14]);
+	uart &= ~CFG_UART_MUX_MASK;
+	uart |= CFG_LPUART_EN << CFG_UART_MUX_SHIFT;
+	QIXIS_WRITE(brdcfg[14], uart);
+#endif
+
 	return 0;
 }
 

configs/ls1046aqds_lpuart_defconfig

@@ -0,0 +1,30 @@
+CONFIG_ARM=y
+CONFIG_TARGET_LS1046AQDS=y
+CONFIG_SYS_FSL_DDR4=y
+CONFIG_DEFAULT_DEVICE_TREE="fsl-ls1046a-qds-lpuart"
+CONFIG_FIT=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_OF_BOARD_SETUP=y
+CONFIG_SYS_EXTRA_OPTIONS="LPUART"
+CONFIG_BOOTDELAY=10
+CONFIG_HUSH_PARSER=y
+CONFIG_CMD_BOOTZ=y
+CONFIG_CMD_GREPENV=y
+CONFIG_CMD_MEMTEST=y
+CONFIG_CMD_MEMINFO=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_SF=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_DHCP=y
+CONFIG_CMD_MII=y
+CONFIG_CMD_PING=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_EXT2=y
+CONFIG_CMD_FAT=y
+CONFIG_OF_CONTROL=y
+CONFIG_DM=y
+CONFIG_DM_SPI=y
+CONFIG_SPI_FLASH=y
+CONFIG_FSL_DSPI=y
+CONFIG_DM_SERIAL=y
+CONFIG_FSL_LPUART=y

include/configs/ls1046aqds.h

@@ -127,6 +127,14 @@ unsigned long get_board_ddr_clk(void);
 #endif
 #endif
 
+/* LPUART */
+#ifdef CONFIG_LPUART
+#define CONFIG_LPUART_32B_REG
+#define CFG_UART_MUX_MASK	0x6
+#define CFG_UART_MUX_SHIFT	1
+#define CFG_LPUART_EN		0x2
+#endif
+
 /* SATA */
 #define CONFIG_LIBATA
 #define CONFIG_SCSI_AHCI