Contributors: 11
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Anton Blanchard |
327 |
65.66% |
3 |
18.75% |
| Benjamin Herrenschmidt |
91 |
18.27% |
1 |
6.25% |
| John Rose |
29 |
5.82% |
1 |
6.25% |
| Paul Mackerras |
24 |
4.82% |
3 |
18.75% |
| Christian Dietrich |
9 |
1.81% |
1 |
6.25% |
| Nathan T. Lynch |
6 |
1.20% |
1 |
6.25% |
| Arnd Bergmann |
5 |
1.00% |
2 |
12.50% |
| Nishanth Aravamudan |
3 |
0.60% |
1 |
6.25% |
| Linus Torvalds (pre-git) |
2 |
0.40% |
1 |
6.25% |
| Greg Kroah-Hartman |
1 |
0.20% |
1 |
6.25% |
| Dave Jones |
1 |
0.20% |
1 |
6.25% |
| Total |
498 |
|
16 |
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/time.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/rtc.h>
#include <linux/delay.h>
#include <linux/ratelimit.h>
#include <asm/rtas.h>
#include <asm/time.h>
#define MAX_RTC_WAIT 5000 /* 5 sec */
time64_t __init rtas_get_boot_time(void)
{
int ret[8];
int error;
unsigned int wait_time;
u64 max_wait_tb;
max_wait_tb = get_tb() + tb_ticks_per_usec * 1000 * MAX_RTC_WAIT;
do {
error = rtas_call(rtas_function_token(RTAS_FN_GET_TIME_OF_DAY), 0, 8, ret);
wait_time = rtas_busy_delay_time(error);
if (wait_time) {
/* This is boot time so we spin. */
udelay(wait_time*1000);
}
} while (wait_time && (get_tb() < max_wait_tb));
if (error != 0) {
printk_ratelimited(KERN_WARNING
"error: reading the clock failed (%d)\n",
error);
return 0;
}
return mktime64(ret[0], ret[1], ret[2], ret[3], ret[4], ret[5]);
}
/* NOTE: get_rtc_time will get an error if executed in interrupt context
* and if a delay is needed to read the clock. In this case we just
* silently return without updating rtc_tm.
*/
void rtas_get_rtc_time(struct rtc_time *rtc_tm)
{
int ret[8];
int error;
unsigned int wait_time;
u64 max_wait_tb;
max_wait_tb = get_tb() + tb_ticks_per_usec * 1000 * MAX_RTC_WAIT;
do {
error = rtas_call(rtas_function_token(RTAS_FN_GET_TIME_OF_DAY), 0, 8, ret);
wait_time = rtas_busy_delay_time(error);
if (wait_time) {
if (in_interrupt()) {
memset(rtc_tm, 0, sizeof(struct rtc_time));
printk_ratelimited(KERN_WARNING
"error: reading clock "
"would delay interrupt\n");
return; /* delay not allowed */
}
msleep(wait_time);
}
} while (wait_time && (get_tb() < max_wait_tb));
if (error != 0) {
printk_ratelimited(KERN_WARNING
"error: reading the clock failed (%d)\n",
error);
return;
}
rtc_tm->tm_sec = ret[5];
rtc_tm->tm_min = ret[4];
rtc_tm->tm_hour = ret[3];
rtc_tm->tm_mday = ret[2];
rtc_tm->tm_mon = ret[1] - 1;
rtc_tm->tm_year = ret[0] - 1900;
}
int rtas_set_rtc_time(struct rtc_time *tm)
{
int error, wait_time;
u64 max_wait_tb;
max_wait_tb = get_tb() + tb_ticks_per_usec * 1000 * MAX_RTC_WAIT;
do {
error = rtas_call(rtas_function_token(RTAS_FN_SET_TIME_OF_DAY), 7, 1, NULL,
tm->tm_year + 1900, tm->tm_mon + 1,
tm->tm_mday, tm->tm_hour, tm->tm_min,
tm->tm_sec, 0);
wait_time = rtas_busy_delay_time(error);
if (wait_time) {
if (in_interrupt())
return 1; /* probably decrementer */
msleep(wait_time);
}
} while (wait_time && (get_tb() < max_wait_tb));
if (error != 0)
printk_ratelimited(KERN_WARNING
"error: setting the clock failed (%d)\n",
error);
return 0;
}