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| author | Peter Delevoryas | 2022-07-14 16:24:38 +0200 |
|---|---|---|
| committer | Cédric Le Goater | 2022-07-14 16:24:38 +0200 |
| commit | d272d1410c91f399af15ef9ae4b561bc621de115 (patch) | |
| tree | ea7b0428cf5854428ab2cde849dbe3bb97d409f3 | |
| parent | aspeed: sbc: Allow per-machine settings (diff) | |
| download | qemu-d272d1410c91f399af15ef9ae4b561bc621de115.tar.gz qemu-d272d1410c91f399af15ef9ae4b561bc621de115.tar.xz qemu-d272d1410c91f399af15ef9ae4b561bc621de115.zip | |
hw/i2c/pmbus: Add idle state to return 0xff's
Signed-off-by: Peter Delevoryas <pdel@fb.com>
Reviewed-by: Titus Rwantare <titusr@google.com>
Message-Id: <20220701000626.77395-2-me@pjd.dev>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
| -rw-r--r-- | hw/i2c/pmbus_device.c | 9 | ||||
| -rw-r--r-- | include/hw/i2c/pmbus_device.h | 7 |
2 files changed, 16 insertions, 0 deletions
diff --git a/hw/i2c/pmbus_device.c b/hw/i2c/pmbus_device.c index 749a33af82..4071a88cfc 100644 --- a/hw/i2c/pmbus_device.c +++ b/hw/i2c/pmbus_device.c @@ -261,6 +261,11 @@ void pmbus_check_limits(PMBusDevice *pmdev) } } +void pmbus_idle(PMBusDevice *pmdev) +{ + pmdev->code = PMBUS_IDLE_STATE; +} + /* assert the status_cml error upon receipt of malformed command */ static void pmbus_cml_error(PMBusDevice *pmdev) { @@ -980,6 +985,10 @@ static uint8_t pmbus_receive_byte(SMBusDevice *smd) } break; + case PMBUS_IDLE_STATE: + pmbus_send8(pmdev, PMBUS_ERR_BYTE); + break; + case PMBUS_CLEAR_FAULTS: /* Send Byte */ case PMBUS_PAGE_PLUS_WRITE: /* Block Write-only */ case PMBUS_STORE_DEFAULT_ALL: /* Send Byte */ diff --git a/include/hw/i2c/pmbus_device.h b/include/hw/i2c/pmbus_device.h index 0f4d6b3fad..93f5d57c9d 100644 --- a/include/hw/i2c/pmbus_device.h +++ b/include/hw/i2c/pmbus_device.h @@ -155,6 +155,7 @@ enum pmbus_registers { PMBUS_MFR_MAX_TEMP_1 = 0xC0, /* R/W word */ PMBUS_MFR_MAX_TEMP_2 = 0xC1, /* R/W word */ PMBUS_MFR_MAX_TEMP_3 = 0xC2, /* R/W word */ + PMBUS_IDLE_STATE = 0xFF, }; /* STATUS_WORD */ @@ -527,6 +528,12 @@ int pmbus_page_config(PMBusDevice *pmdev, uint8_t page_index, uint64_t flags); */ void pmbus_check_limits(PMBusDevice *pmdev); +/** + * Enter an idle state where only the PMBUS_ERR_BYTE will be returned + * indefinitely until a new command is issued. + */ +void pmbus_idle(PMBusDevice *pmdev); + extern const VMStateDescription vmstate_pmbus_device; #define VMSTATE_PMBUS_DEVICE(_field, _state) { \ |