diff options
Diffstat (limited to 'arch/powerpc/platforms/85xx')
| -rw-r--r-- | arch/powerpc/platforms/85xx/misc.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/85xx/misc.c b/arch/powerpc/platforms/85xx/misc.c index 3e62fcb04c1..4fe376e9c3b 100644 --- a/arch/powerpc/platforms/85xx/misc.c +++ b/arch/powerpc/platforms/85xx/misc.c @@ -13,11 +13,43 @@ #include <linux/irq.h> #include <linux/module.h> #include <asm/irq.h> +#include <asm/io.h> +#include <asm/prom.h> +#include <sysdev/fsl_soc.h> + +static __be32 __iomem *rstcr; extern void abort(void); +static int __init mpc85xx_rstcr(void) +{ + struct device_node *np; + np = of_find_node_by_name(NULL, "global-utilities"); + if ((np && of_get_property(np, "fsl,has-rstcr", NULL))) { + const u32 *prop = of_get_property(np, "reg", NULL); + if (prop) { + /* map reset control register + * 0xE00B0 is offset of reset control register + */ + rstcr = ioremap(get_immrbase() + *prop + 0xB0, 0xff); + if (!rstcr) + printk (KERN_EMERG "Error: reset control " + "register not mapped!\n"); + } + } else + printk (KERN_INFO "rstcr compatible register does not exist!\n"); + if (np) + of_node_put(np); + return 0; +} + +arch_initcall(mpc85xx_rstcr); + void mpc85xx_restart(char *cmd) { local_irq_disable(); + if (rstcr) + /* set reset control register */ + out_be32(rstcr, 0x2); /* HRESET_REQ */ abort(); } |