dm: sunxi: Add support for serial using driver model

Add a driver for the designware serial UART used on sunxi. This just
redirects to the normal ns16550 driver.

Add a stdout-path to the device tree so that the correct UART is chosen.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

4 files changed, 55 insertions, 6 deletions

diff --git a/arch/arm/dts/sun7i-a20-pcduino3.dts b/arch/arm/dts/sun7i-a20-pcduino3.dts
index 046dfc0d45d..f7cc8e7a09c 100644
--- a/arch/arm/dts/sun7i-a20-pcduino3.dts
+++ b/arch/arm/dts/sun7i-a20-pcduino3.dts
@@ -20,6 +20,10 @@
 	model = "LinkSprite pcDuino3";
 	compatible = "linksprite,pcduino3", "allwinner,sun7i-a20";
 
+	chosen {
+		stdout-path = &uart0;
+	};
+
 	soc@01c00000 {
 		mmc0: mmc@01c0f000 {
 			pinctrl-names = "default";
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 2c19ebc2885..8c849427611 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_ALTERA_UART) += altera_uart.o
 obj-$(CONFIG_ALTERA_JTAG_UART) += altera_jtag_uart.o
 obj-$(CONFIG_ARM_DCC) += arm_dcc.o
 obj-$(CONFIG_ATMEL_USART) += atmel_usart.o
+obj-$(CONFIG_DW_SERIAL) += serial_dw.o
 obj-$(CONFIG_LPC32XX_HSUART) += lpc32xx_hsuart.o
 obj-$(CONFIG_MCFUART) += mcfuart.o
 obj-$(CONFIG_OPENCORES_YANU) += opencores_yanu.o
diff --git a/drivers/serial/serial_dw.c b/drivers/serial/serial_dw.c
new file mode 100644
index 00000000000..a348f2956ac
--- /dev/null
+++ b/drivers/serial/serial_dw.c
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2014 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <ns16550.h>
+#include <serial.h>
+
+static const struct udevice_id dw_serial_ids[] = {
+	{ .compatible = "snps,dw-apb-uart" },
+	{ }
+};
+
+static int dw_serial_ofdata_to_platdata(struct udevice *dev)
+{
+	struct ns16550_platdata *plat = dev_get_platdata(dev);
+	int ret;
+
+	ret = ns16550_serial_ofdata_to_platdata(dev);
+	if (ret)
+		return ret;
+	plat->clock = CONFIG_SYS_NS16550_CLK;
+
+	return 0;
+}
+
+U_BOOT_DRIVER(serial_ns16550) = {
+	.name	= "serial_dw",
+	.id	= UCLASS_SERIAL,
+	.of_match = dw_serial_ids,
+	.ofdata_to_platdata = dw_serial_ofdata_to_platdata,
+	.platdata_auto_alloc_size = sizeof(struct ns16550_platdata),
+	.priv_auto_alloc_size = sizeof(struct NS16550),
+	.probe = ns16550_serial_probe,
+	.ops	= &ns16550_serial_ops,
+};
diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h
index 316e7d93df4..ce038eddf04 100644
--- a/include/configs/sunxi-common.h
+++ b/include/configs/sunxi-common.h
@@ -30,6 +30,9 @@
 #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_DM)
 # define CONFIG_CMD_DM
 # define CONFIG_DM_GPIO
+# define CONFIG_DM_SERIAL
+# define CONFIG_DW_SERIAL
+# define CONFIG_SYS_MALLOC_F_LEN	(1 << 10)
 #endif
 
 /*
@@ -41,13 +44,15 @@
 #define CONFIG_SYS_NS16550
 #define CONFIG_SYS_NS16550_SERIAL
 /* ns16550 reg in the low bits of cpu reg */
-#define CONFIG_SYS_NS16550_REG_SIZE	-4
 #define CONFIG_SYS_NS16550_CLK		24000000
-#define CONFIG_SYS_NS16550_COM1		SUNXI_UART0_BASE
-#define CONFIG_SYS_NS16550_COM2		SUNXI_UART1_BASE
-#define CONFIG_SYS_NS16550_COM3		SUNXI_UART2_BASE
-#define CONFIG_SYS_NS16550_COM4		SUNXI_UART3_BASE
-#define CONFIG_SYS_NS16550_COM5		SUNXI_R_UART_BASE
+#ifndef CONFIG_DM_SERIAL
+# define CONFIG_SYS_NS16550_REG_SIZE	-4
+# define CONFIG_SYS_NS16550_COM1		SUNXI_UART0_BASE
+# define CONFIG_SYS_NS16550_COM2		SUNXI_UART1_BASE
+# define CONFIG_SYS_NS16550_COM3		SUNXI_UART2_BASE
+# define CONFIG_SYS_NS16550_COM4		SUNXI_UART3_BASE
+# define CONFIG_SYS_NS16550_COM5		SUNXI_R_UART_BASE
+#endif
 
 /* DRAM Base */
 #define CONFIG_SYS_SDRAM_BASE		0x40000000