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| 2 | |
| 3 | * Instantiate mmio-mapped RTC chips based on device tree information
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| 4 | *
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| 5 | * Copyright 2007 David Gibson <[email protected]>, IBM Corporation.
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| 6 |
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| 7 | #include <linux/kernel.h>
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| 8 | #include <linux/init.h>
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| 9 | #include <linux/of.h>
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| 10 | #include <linux/of_address.h>
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| 11 | #include <linux/platform_device.h>
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| 12 | #include <linux/slab.h>
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| 13 |
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| 14 | #include <asm/prom.h>
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| 15 |
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| 16 | static __initdata struct {
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| 17 | const char *compatible;
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| 18 | char *plat_name;
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| 19 | } of_rtc_table[] = {
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| 20 | { "ds1743-nvram", "rtc-ds1742" },
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| 21 | };
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| 22 |
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| 23 | void __init of_instantiate_rtc(void)
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| 24 | {
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| 25 | struct device_node *node;
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| 26 | int err;
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| 27 | int i;
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| 28 |
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| 29 | for (i = 0; i < ARRAY_SIZE(of_rtc_table); i++) {
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| 30 | char *plat_name = of_rtc_table[i].plat_name;
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| 31 |
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| 32 | for_each_compatible_node(node, NULL,
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| 33 | of_rtc_table[i].compatible) {
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| 34 | struct resource *res;
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| 35 |
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| 36 | res = kmalloc_obj(*res);
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| 37 | if (!res) {
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| 38 | printk(KERN_ERR "OF RTC: Out of memory "
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| 39 | "allocating resource structure for %pOF\n",
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| 40 | node);
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| 41 | continue;
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| 42 | }
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| 43 |
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| 44 | err = of_address_to_resource(node, 0, res);
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| 45 | if (err) {
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| 46 | printk(KERN_ERR "OF RTC: Error "
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| 47 | "translating resources for %pOF\n",
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| 48 | node);
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| 49 | continue;
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| 50 | }
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| 51 |
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| 52 | printk(KERN_INFO "OF_RTC: %pOF is a %s @ 0x%llx-0x%llx\n",
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| 53 | node, plat_name,
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| 54 | (unsigned long long)res->start,
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| 55 | (unsigned long long)res->end);
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| 56 | platform_device_register_simple(plat_name, -1, res, 1);
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| 57 | }
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| 58 | }
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| 59 | }
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