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powerpc/85xx: sbc8560 - Fix warm reboot with board specific reset function

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The existing fsl_rstcr_restart function is not applicable to the
mpc8560. The Global Utilities Block on this earlier CPU doesn't have
the control/reset register at 0xe00b0.  This implements a board
specific reset function that uses the RCR(Reset Control Register) of
the sbc8560's EPLD to do a reset.

Signed-off-by: Liang Li <Liang.Li@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Liang Li 2009-08-14 10:36:14 -04:00 committed by Kumar Gala
parent 944ac03804
commit 7792da8567
1 changed files with 38 additions and 1 deletions
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39
arch/powerpc/platforms/85xx/sbc8560.c
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@ -267,6 +267,43 @@ arch_initcall(sbc8560_rtc_init);
#endif /* M48T59 */
static __u8 __iomem *brstcr;
static int __init sbc8560_bdrstcr_init(void)
{
struct device_node *np;
struct resource res;
np = of_find_compatible_node(NULL, NULL, "wrs,sbc8560-brstcr");
if (np == NULL) {
printk(KERN_WARNING "sbc8560: No board specific RSTCR in DTB.\n");
return -ENODEV;
}
of_address_to_resource(np, 0, &res);
printk(KERN_INFO "sbc8560: Found BRSTCR at i/o 0x%x\n", res.start);
brstcr = ioremap(res.start, res.end - res.start);
if(!brstcr)
printk(KERN_WARNING "sbc8560: ioremap of brstcr failed.\n");
of_node_put(np);
return 0;
}
arch_initcall(sbc8560_bdrstcr_init);
void sbc8560_rstcr_restart(char * cmd)
{
local_irq_disable();
if(brstcr)
clrbits8(brstcr, 0x80);
while(1);
}
define_machine(sbc8560) {
.name = "SBC8560",
.probe = sbc8560_probe,
@ -274,7 +311,7 @@ define_machine(sbc8560) {
.init_IRQ = sbc8560_pic_init,
.show_cpuinfo = sbc8560_show_cpuinfo,
.get_irq = mpic_get_irq,
.restart = fsl_rstcr_restart,
.restart = sbc8560_rstcr_restart,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
};