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hw/i2c: add pca954x i2c-mux switch

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The pca954x is an i2c mux, and this adds support for two variants of
this device: the pca9546 and pca9548.

This device is very common on BMCs to route a different channel to each
PCIe i2c bus downstream from the BMC.

Signed-off-by: Patrick Venture <venture@google.com>
Reviewed-by: Hao Wu <wuhaotsh@google.com>
Reviewed-by: Havard Skinnemoen <hskinnemoen@google.com>
Message-Id: <20210412194522.664594-5-venture@google.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
This commit is contained in:
Patrick Venture 2021-04-12 12:45:22 -07:00 • committed by Corey Minyard
parent 3f9b32595e
commit 065177eece
6 changed files with 325 additions and 0 deletions
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4
hw/i2c/Kconfig
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@ -28,3 +28,7 @@ config IMX_I2C
config MPC_I2C
bool
select I2C
config PCA954X
bool
select I2C