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Diffstat (limited to 'arch/arm/mach-davinci/serial.c')
-rw-r--r--arch/arm/mach-davinci/serial.c34
1 files changed, 26 insertions, 8 deletions
diff --git a/arch/arm/mach-davinci/serial.c b/arch/arm/mach-davinci/serial.c
index 7ce5ba086575..1875740fe27c 100644
--- a/arch/arm/mach-davinci/serial.c
+++ b/arch/arm/mach-davinci/serial.c
@@ -35,14 +35,20 @@ static inline unsigned int serial_read_reg(struct plat_serial8250_port *up,
int offset)
{
offset <<= up->regshift;
- return (unsigned int)__raw_readl(IO_ADDRESS(up->mapbase) + offset);
+
+ WARN_ONCE(!up->membase, "unmapped read: uart[%d]\n", offset);
+
+ return (unsigned int)__raw_readl(up->membase + offset);
}
static inline void serial_write_reg(struct plat_serial8250_port *p, int offset,
int value)
{
offset <<= p->regshift;
- __raw_writel(value, IO_ADDRESS(p->mapbase) + offset);
+
+ WARN_ONCE(!p->membase, "unmapped write: uart[%d]\n", offset);
+
+ __raw_writel(value, p->membase + offset);
}
static void __init davinci_serial_reset(struct plat_serial8250_port *p)
@@ -77,20 +83,32 @@ int __init davinci_serial_init(struct davinci_uart_config *info)
* 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++) {
+ for (i = 0; p->flags; i++, p++) {
if (!(info->enabled_uarts & (1 << i)))
continue;
sprintf(name, "uart%d", i);
uart_clk = clk_get(dev, name);
- if (IS_ERR(uart_clk))
+ 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);
+ continue;
}
+
+ clk_enable(uart_clk);
+ p->uartclk = clk_get_rate(uart_clk);
+
+ if (!p->membase && p->mapbase) {
+ p->membase = ioremap(p->mapbase, SZ_4K);
+
+ if (p->membase)
+ p->flags &= ~UPF_IOREMAP;
+ else
+ pr_err("uart regs ioremap failed\n");
+ }
+
+ if (p->membase && p->type != PORT_AR7)
+ davinci_serial_reset(p);
}
return platform_device_register(soc_info->serial_dev);