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| author | Liang Li <Liang.Li@windriver.com> | 2009-08-14 10:36:14 -0400 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2009-08-24 20:48:12 -0500 |
| commit | 7792da8567a70be3280c8eef916334e6923815e3 (patch) | |
| tree | 8d792c7b995502493306c496cdac39856e1f689b | |
| parent | 944ac03804c4c9c0879347098ea458fd57f38687 (diff) | |
| download | linux-3.10-7792da8567a70be3280c8eef916334e6923815e3.tar.gz linux-3.10-7792da8567a70be3280c8eef916334e6923815e3.tar.bz2 linux-3.10-7792da8567a70be3280c8eef916334e6923815e3.zip | |
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>
| -rw-r--r-- | arch/powerpc/platforms/85xx/sbc8560.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/85xx/sbc8560.c b/arch/powerpc/platforms/85xx/sbc8560.c index cc27807a8b6..a5ad1c7794b 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, }; |