diff options
Diffstat (limited to 'arch/powerpc/sysdev/of_rtc.c')
| -rw-r--r-- | arch/powerpc/sysdev/of_rtc.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/of_rtc.c b/arch/powerpc/sysdev/of_rtc.c new file mode 100644 index 000000000..6f54b54b1 --- /dev/null +++ b/arch/powerpc/sysdev/of_rtc.c @@ -0,0 +1,61 @@ +/* + * Instantiate mmio-mapped RTC chips based on device tree information + * + * Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ +#include <linux/kernel.h> +#include <linux/of.h> +#include <linux/init.h> +#include <linux/of_address.h> +#include <linux/of_platform.h> +#include <linux/slab.h> + +static __initdata struct { + const char *compatible; + char *plat_name; +} of_rtc_table[] = { + { "ds1743-nvram", "rtc-ds1742" }, +}; + +void __init of_instantiate_rtc(void) +{ + struct device_node *node; + int err; + int i; + + for (i = 0; i < ARRAY_SIZE(of_rtc_table); i++) { + char *plat_name = of_rtc_table[i].plat_name; + + for_each_compatible_node(node, NULL, + of_rtc_table[i].compatible) { + struct resource *res; + + res = kmalloc(sizeof(*res), GFP_KERNEL); + if (!res) { + printk(KERN_ERR "OF RTC: Out of memory " + "allocating resource structure for %s\n", + node->full_name); + continue; + } + + err = of_address_to_resource(node, 0, res); + if (err) { + printk(KERN_ERR "OF RTC: Error " + "translating resources for %s\n", + node->full_name); + continue; + } + + printk(KERN_INFO "OF_RTC: %s is a %s @ 0x%llx-0x%llx\n", + node->full_name, plat_name, + (unsigned long long)res->start, + (unsigned long long)res->end); + platform_device_register_simple(plat_name, -1, res, 1); + } + } +} |