cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

rtc_cmos_setup.c (1602B)

      1/*
      2 * Setup code for PC-style Real-Time Clock.
      3 *
      4 * Author: Wade Farnsworth <wfarnsworth@mvista.com>
      5 *
      6 * 2007 (c) MontaVista Software, Inc. This file is licensed under
      7 * the terms of the GNU General Public License version 2. This program
      8 * is licensed "as is" without any warranty of any kind, whether express
      9 * or implied.
     10 */
     11
     12#include <linux/platform_device.h>
     13#include <linux/err.h>
     14#include <linux/init.h>
     15#include <linux/module.h>
     16#include <linux/mc146818rtc.h>
     17#include <linux/of_address.h>
     18
     19
     20static int  __init add_rtc(void)
     21{
     22	struct device_node *np;
     23	struct platform_device *pd;
     24	struct resource res[2];
     25	unsigned int num_res = 1;
     26	int ret;
     27
     28	memset(&res, 0, sizeof(res));
     29
     30	np = of_find_compatible_node(NULL, NULL, "pnpPNP,b00");
     31	if (!np)
     32		return -ENODEV;
     33
     34	ret = of_address_to_resource(np, 0, &res[0]);
     35	of_node_put(np);
     36	if (ret)
     37		return ret;
     38
     39	/*
     40	 * RTC_PORT(x) is hardcoded in asm/mc146818rtc.h.  Verify that the
     41	 * address provided by the device node matches.
     42	 */
     43	if (res[0].start != RTC_PORT(0))
     44		return -EINVAL;
     45
     46	np = of_find_compatible_node(NULL, NULL, "chrp,iic");
     47	if (!np)
     48		np = of_find_compatible_node(NULL, NULL, "pnpPNP,000");
     49	if (np) {
     50		of_node_put(np);
     51		/*
     52		 * Use a fixed interrupt value of 8 since on PPC if we are
     53		 * using this its off an i8259 which we ensure has interrupt
     54		 * numbers 0..15.
     55		 */
     56		res[1].start = 8;
     57		res[1].end = 8;
     58		res[1].flags = IORESOURCE_IRQ;
     59		num_res++;
     60	}
     61
     62	pd = platform_device_register_simple("rtc_cmos", -1,
     63					     &res[0], num_res);
     64
     65	return PTR_ERR_OR_ZERO(pd);
     66}
     67fs_initcall(add_rtc);
     68
     69MODULE_LICENSE("GPL");