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fby4: ff: DIMM and PMIC muxes remain connected to BIC after BIC warm … #1518

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EliHuang-wiwynn
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…reset.

Description:
After BIC warm reset, set the latch enable for 'SEL_SMB_MUX_PMIC_R' and 'SEL_SMB_MUX_DIMM_R' to retain the GPIO status when reinitialize GPIO table.

Motivation:
When in CXL ready state, even after performing a BIC warm reset, the DIMM and PMIC muxes should remain connected to BIC.

Test Plan:

  • DIMM & VR device address can be scanned after BIC warm reset: Pass

Test log:
-FF:
/BIC warm reset when power off/
/i2c scan I2C_8, I2C_9/
0 devices found on I2C_8
0 devices found on I2C_9

 /*BIC warm reset when power on*/
 /*i2c scan I2C_8, I2C_9*/
 ```
 2 devices found on I2C_8
 ```
 14 devices found on I2C_9

…reset.

Description:
       After BIC warm reset, set the latch enable for 'SEL_SMB_MUX_PMIC_R' and 'SEL_SMB_MUX_DIMM_R' to retain the GPIO status when reinitialize GPIO table.

Motivation:
       When in CXL ready state, even after performing a BIC warm reset, the DIMM and PMIC muxes should remain connected to BIC.

Test Plan:
- DIMM & VR device address can be scanned after BIC warm reset: Pass

Test log:
-FF:
     /*BIC warm reset when power off*/
     /*i2c scan I2C_8, I2C_9*/
     ```
     0 devices found on I2C_8
     ```
     0 devices found on I2C_9

     /*BIC warm reset when power on*/
     /*i2c scan I2C_8, I2C_9*/
     ```
     2 devices found on I2C_8
     ```
     14 devices found on I2C_9
@facebook-github-bot facebook-github-bot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Dec 8, 2023
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@facebook-github-bot has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

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This pull request has been merged in 4e96944.

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3 participants