Title: [4108] trunk/arch/blackfin/kernel/reboot.c: [#2424]
Add proper SW System Reset delay sequence
- Revision
- 4108
- Author
- hennerich
- Date
- 2008-01-16 01:52:29 -0600 (Wed, 16 Jan 2008)
Log Message
[#2424] Add proper SW System Reset delay sequence
Diffstat
reboot.c | 13 ++++++++-----
1 files changed, 8 insertions(+), 5 deletions(-)
Modified Paths
Diff
Modified: trunk/arch/blackfin/kernel/reboot.c (4107 => 4108)
--- trunk/arch/blackfin/kernel/reboot.c 2008-01-16 07:27:02 UTC (rev 4107)
+++ trunk/arch/blackfin/kernel/reboot.c 2008-01-16 07:52:29 UTC (rev 4108)
@@ -30,7 +30,6 @@
__attribute__((l1_text))
void bfin_reset(void)
{
- int cntr;
/* force BMODE and disable Core B (as needed) */
bfin_write_SYSCR(SYSCR_VAL);
@@ -40,12 +39,16 @@
while (1) {
/* initiate system soft reset with magic 0x7 */
bfin_write_SWRST(0x7);
- for (cntr = 0; cntr < SWRST_DELAY; cntr++)
- asm("NOP;");
+
+ /* Wait for System reset to actually reset, needs to be 5 SCLKs, */
+ /* Assume CCLK / SCLK ratio is worst case (15), and use 5*15 */
+
+ asm("LSETUP(.Lfoo,.Lfoo) LC0 = %0\n .Lfoo: NOP;\n"
+ : : "a" (SWRST_DELAY) : "LC0", "LT0", "LB0");
+
/* clear system soft reset */
bfin_write_SWRST(0);
- for (cntr = 0; cntr < SWRST_DELAY; cntr++)
- asm("NOP;");
+ asm("ssync;");
/* issue core reset */
asm("raise 1");
}
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