1 files changed, 46 insertions, 39 deletions

diff --git a/arch/arm/mach-davinci/serial.c b/arch/arm/mach-davinci/serial.c
index 3010f9971255..c530c7333d0a 100644
--- a/arch/arm/mach-davinci/serial.c
+++ b/arch/arm/mach-davinci/serial.c
@@ -32,65 +32,72 @@
 #include <mach/hardware.h>
 #include <mach/serial.h>
 #include <mach/irqs.h>
+#include <mach/cputype.h>
+#include <mach/common.h>
 
-#define UART_DAVINCI_PWREMU 0x0c
+#include "clock.h"
 
-static inline unsigned int davinci_serial_in(struct plat_serial8250_port *up,
-					  int offset)
+static inline unsigned int serial_read_reg(struct plat_serial8250_port *up,
+					   int offset)
 {
 	offset <<= up->regshift;
-	return (unsigned int)__raw_readb(up->membase + offset);
+	return (unsigned int)__raw_readl(IO_ADDRESS(up->mapbase) + offset);
 }
 
-static inline void davinci_serial_outp(struct plat_serial8250_port *p,
-				       int offset, int value)
+static inline void serial_write_reg(struct plat_serial8250_port *p, int offset,
+				    int value)
 {
 	offset <<= p->regshift;
-	__raw_writeb(value, p->membase + offset);
+	__raw_writel(value, IO_ADDRESS(p->mapbase) + offset);
 }
 
-static struct plat_serial8250_port serial_platform_data[] = {
-	{
-		.membase	= (char *)IO_ADDRESS(DAVINCI_UART0_BASE),
-		.mapbase	= (unsigned long)DAVINCI_UART0_BASE,
-		.irq		= IRQ_UARTINT0,
-		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
-		.iotype		= UPIO_MEM,
-		.regshift	= 2,
-		.uartclk	= 27000000,
-	},
-	{
-		.flags		= 0
-	},
-};
-
-static struct platform_device serial_device = {
-	.name			= "serial8250",
-	.id			= PLAT8250_DEV_PLATFORM,
-	.dev			= {
-		.platform_data	= serial_platform_data,
-	},
-};
-
 static void __init davinci_serial_reset(struct plat_serial8250_port *p)
 {
-	/* reset both transmitter and receiver: bits 14,13 = UTRST, URRST */
 	unsigned int pwremu = 0;
 
-	davinci_serial_outp(p, UART_IER, 0);  /* disable all interrupts */
+	serial_write_reg(p, UART_IER, 0);  /* disable all interrupts */
 
-	davinci_serial_outp(p, UART_DAVINCI_PWREMU, pwremu);
+	/* reset both transmitter and receiver: bits 14,13 = UTRST, URRST */
+	serial_write_reg(p, UART_DAVINCI_PWREMU, pwremu);
 	mdelay(10);
 
 	pwremu |= (0x3 << 13);
 	pwremu |= 0x1;
-	davinci_serial_outp(p, UART_DAVINCI_PWREMU, pwremu);
+	serial_write_reg(p, UART_DAVINCI_PWREMU, pwremu);
+
+	if (cpu_is_davinci_dm646x())
+		serial_write_reg(p, UART_DM646X_SCR,
+				 UART_DM646X_SCR_TX_WATERMARK);
 }
 
-static int __init davinci_init(void)
+int __init davinci_serial_init(struct davinci_uart_config *info)
 {
-	davinci_serial_reset(&serial_platform_data[0]);
-	return platform_device_register(&serial_device);
-}
+	int i;
+	char name[16];
+	struct clk *uart_clk;
+	struct davinci_soc_info *soc_info = &davinci_soc_info;
+	struct device *dev = &soc_info->serial_dev->dev;
+	struct plat_serial8250_port *p = dev->platform_data;
+
+	/*
+	 * Make sure the serial ports are muxed on at this point.
+	 * You have to mux them off in device drivers later on if not needed.
+	 */
+	for (i = 0; i < DAVINCI_MAX_NR_UARTS; i++, p++) {
+		if (!(info->enabled_uarts & (1 << i)))
+			continue;
 
-arch_initcall(davinci_init);
+		sprintf(name, "uart%d", i);
+		uart_clk = clk_get(dev, name);
+		if (IS_ERR(uart_clk))
+			printk(KERN_ERR "%s:%d: failed to get UART%d clock\n",
+					__func__, __LINE__, i);
+		else {
+			clk_enable(uart_clk);
+			p->uartclk = clk_get_rate(uart_clk);
+			davinci_serial_reset(p);
+		}
+	}
+
+	return platform_device_register(soc_info->serial_dev);
+}