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authorLiang Li <Liang.Li@windriver.com>2009-08-14 10:36:14 -0400
committerKumar Gala <galak@kernel.crashing.org>2009-08-24 20:48:12 -0500
commit7792da8567a70be3280c8eef916334e6923815e3 (patch)
tree8d792c7b995502493306c496cdac39856e1f689b /arch/powerpc/platforms
parent944ac03804c4c9c0879347098ea458fd57f38687 (diff)
downloadlinux-7792da8567a70be3280c8eef916334e6923815e3.tar.bz2
powerpc/85xx: sbc8560 - Fix warm reboot with board specific reset function
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>
Diffstat (limited to 'arch/powerpc/platforms')
-rw-r--r--arch/powerpc/platforms/85xx/sbc8560.c39
1 files changed, 38 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/85xx/sbc8560.c b/arch/powerpc/platforms/85xx/sbc8560.c
index cc27807a8b64..a5ad1c7794bf 100644
--- a/arch/powerpc/platforms/85xx/sbc8560.c
+++ b/arch/powerpc/platforms/85xx/sbc8560.c
@@ -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,
};