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rk: uncompress.h: add debug_uart.h and support timeout on putc

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黄涛
2013-08-30 11:30:10 +08:00
parent 8e89f89230
commit 0fcfd511ab
1 changed files with 3 additions and 1 deletions
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4
arch/arm/plat-rk/include/plat/uncompress.h
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@@ -3,13 +3,15 @@
#include <linux/serial_reg.h>
#include <mach/io.h>
#include <mach/debug_uart.h>
#ifdef DEBUG_UART_PHYS
static volatile u32 *UART = (u32 *)DEBUG_UART_PHYS;
static void putc(int c)
{
while (!(UART[UART_LSR] & UART_LSR_THRE))
int i = 1000;
while (i-- && !(UART[UART_LSR] & UART_LSR_THRE))
barrier();
UART[UART_TX] = c;
}