58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Instantiate mmio-mapped RTC chips based on device tree information
|
|
*
|
|
* Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
|
|
*/
|
|
#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 %pOF\n",
|
|
node);
|
|
continue;
|
|
}
|
|
|
|
err = of_address_to_resource(node, 0, res);
|
|
if (err) {
|
|
printk(KERN_ERR "OF RTC: Error "
|
|
"translating resources for %pOF\n",
|
|
node);
|
|
continue;
|
|
}
|
|
|
|
printk(KERN_INFO "OF_RTC: %pOF is a %s @ 0x%llx-0x%llx\n",
|
|
node, plat_name,
|
|
(unsigned long long)res->start,
|
|
(unsigned long long)res->end);
|
|
platform_device_register_simple(plat_name, -1, res, 1);
|
|
}
|
|
}
|
|
}
|