mirror of
https://github.com/torvalds/linux
synced 2024-09-06 18:01:05 +00:00
MIPS: boot: Fixes for compressed/uart-16550.c
Fix uart-16550.c for adding XLR/XLP support, changes are: * Make register read/write use volatile pointers * Support 32 bit IO read/write * Increase timeout in waiting for UART LSR Signed-off-by: Jayachandran C <jchandra@broadcom.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5416/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
parent
5649d37c2b
commit
d6a5078459
|
@ -23,23 +23,27 @@
|
|||
#define PORT(offset) (UART0_BASE + (4 * offset))
|
||||
#endif
|
||||
|
||||
#ifndef IOTYPE
|
||||
#define IOTYPE char
|
||||
#endif
|
||||
|
||||
#ifndef PORT
|
||||
#error please define the serial port address for your own machine
|
||||
#endif
|
||||
|
||||
static inline unsigned int serial_in(int offset)
|
||||
{
|
||||
return *((char *)PORT(offset));
|
||||
return *((volatile IOTYPE *)PORT(offset)) & 0xFF;
|
||||
}
|
||||
|
||||
static inline void serial_out(int offset, int value)
|
||||
{
|
||||
*((char *)PORT(offset)) = value;
|
||||
*((volatile IOTYPE *)PORT(offset)) = value & 0xFF;
|
||||
}
|
||||
|
||||
void putc(char c)
|
||||
{
|
||||
int timeout = 1024;
|
||||
int timeout = 1000000;
|
||||
|
||||
while (((serial_in(UART_LSR) & UART_LSR_THRE) == 0) && (timeout-- > 0))
|
||||
;
|
||||
|
|
Loading…
Reference in a new issue