PCI: brcmstb: Add control of rescal reset

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Some STB chips have a special purpose reset controller named RESCAL (reset
calibration).  The PCIe HW can now control RESCAL to start and stop its
operation.  On probe(), the RESCAL is deasserted and the driver goes
through the sequence of setting registers and reading status in order to
start the internal PHY that is required for the PCIe.

Link: https://lore.kernel.org/r/20200911175232.19016-7-james.quinlan@broadcom.com
Signed-off-by: Jim Quinlan <jquinlan@broadcom.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>

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Jim Quinlan 2020-09-11 13:52:26 -04:00 • committed by Lorenzo Pieralisi

parent 04356ac307

commit 740d6c3708

1 changed files with 77 additions and 2 deletions

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drivers/pci/controller/pcie-brcmstb.c

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