| Jingle Hsu | e07ea4c | 2020-07-01 18:26:49 +0800 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | |
| 3 | /* |
| 4 | * Helper functions for dealing with power management registers |
| 5 | * and the differences between PCH variants. |
| 6 | */ |
| 7 | |
| 8 | #include <intelblocks/rtc.h> |
| 9 | #include <soc/pmc.h> |
| 10 | #include <soc/pci_devs.h> |
| 11 | #include <device/pci.h> |
| 12 | #include <console/console.h> |
| 13 | |
| 14 | int soc_get_rtc_failed(void) |
| 15 | { |
| 16 | uint32_t pmcon_b = pci_s_read_config32(PCH_DEV_PMC, GEN_PMCON_B); |
| 17 | int rtc_fail = !!(pmcon_b & RTC_BATTERY_DEAD); |
| 18 | |
| 19 | if (rtc_fail) |
| 20 | printk(BIOS_ERR, "%s: RTC battery dead or removed\n", __func__); |
| 21 | |
| 22 | return rtc_fail; |
| 23 | } |