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| author | Terry Bowman <terry.bowman@amd.com> | 2022-02-02 09:35:24 -0600 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@linux-watchdog.org> | 2022-03-27 17:04:33 +0200 |
| commit | 0578fff4aae5bce3f09875f58e68e9ffbab8daf5 (patch) | |
| tree | 5c88e6372a8a4e03959ad6691f062e380fe8d60c /drivers/watchdog/sp5100_tco.h | |
| parent | 1f182aca230086d4a4469c0f9136a6ea762d6385 (diff) | |
| download | linux-0578fff4aae5bce3f09875f58e68e9ffbab8daf5.tar.bz2 | |
Watchdog: sp5100_tco: Add initialization using EFCH MMIO
cd6h/cd7h port I/O can be disabled on recent AMD hardware. Read
accesses to disabled cd6h/cd7h port I/O will return F's and written
data is dropped. It is recommended to replace the cd6h/cd7h
port I/O with MMIO.
Co-developed-by: Robert Richter <rrichter@amd.com>
Signed-off-by: Robert Richter <rrichter@amd.com>
Signed-off-by: Terry Bowman <terry.bowman@amd.com>
Tested-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220202153525.1693378-4-terry.bowman@amd.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Diffstat (limited to 'drivers/watchdog/sp5100_tco.h')
| -rw-r--r-- | drivers/watchdog/sp5100_tco.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/watchdog/sp5100_tco.h b/drivers/watchdog/sp5100_tco.h index daee872f9b71..8ca1b215e3ce 100644 --- a/drivers/watchdog/sp5100_tco.h +++ b/drivers/watchdog/sp5100_tco.h @@ -83,4 +83,9 @@ #define EFCH_PM_ISACONTROL_MMIOEN BIT(1) #define EFCH_PM_ACPI_MMIO_ADDR 0xfed80000 +#define EFCH_PM_ACPI_MMIO_PM_OFFSET 0x00000300 #define EFCH_PM_ACPI_MMIO_WDT_OFFSET 0x00000b00 + +#define EFCH_PM_ACPI_MMIO_PM_ADDR (EFCH_PM_ACPI_MMIO_ADDR + \ + EFCH_PM_ACPI_MMIO_PM_OFFSET) +#define EFCH_PM_ACPI_MMIO_PM_SIZE 8 |