[PATCH v5 0/2] PCI: microchip: support using either instance 1 or 2

Conor Dooley
2024-08-14T08:09:32Z

From: Conor Dooley <conor.dooley@microchip.com>

The current driver and binding for PolarFire SoC's PCI controller assume
that the root port instance in use is instance 1. The second reg
property constitutes the region encompassing both "control" and "bridge"
registers for both instances. In the driver, a fixed offset is applied to
find the base addresses for instance 1's "control" and "bridge"
registers. The BeagleV Fire uses root port instance 2, so something must
be done so that software can differentiate. This series splits the
second reg property in two, with dedicated "control" and "bridge"
entries so that either instance can be used.

Cheers,
Conor.

v5:
- rebase on top of 6.11-rc1, which brought about a lot of driver change
due to the plda common driver creation - although little actually
changed in terms of the lines edited in this patch.

v4:
- fix a cocci warning reported off list about an inconsistent variable
used between IS_ERR() and PTR_ERR() calls.

v3:
- rename a variable in probe s/axi/apb/

v2:
- try the new reg format before the old one to avoid warnings in the
good case
- reword $subject for 2/2

CC: Daire McNamara <daire.mcnamara@microchip.com>
CC: Lorenzo Pieralisi <lpieralisi@kernel.org>
CC: Krzysztof Wilczyński <kw@linux.com>
CC: Rob Herring <robh@kernel.org>
CC: Bjorn Helgaas <bhelgaas@google.com>
CC: Krzysztof Kozlowski <krzk+dt@kernel.org>
CC: Conor Dooley <conor+dt@kernel.org>
CC: linux-pci@vger.kernel.org
CC: devicetree@vger.kernel.org
CC: linux-kernel@vger.kernel.org
CC: linux-riscv@lists.infradead.org

Conor Dooley (2):
dt-bindings: PCI: microchip,pcie-host: fix reg properties
PCI: microchip: rework reg region handing to support using either
instance 1 or 2

.../bindings/pci/microchip,pcie-host.yaml | 11 +-
.../pci/plda,xpressrich3-axi-common.yaml | 14 ++-
.../bindings/pci/starfive,jh7110-pcie.yaml | 7 ++
.../pci/controller/plda/pcie-microchip-host.c | 116 +++++++++---------
4 files changed, 87 insertions(+), 61 deletions(-)

--
2.43.0