linux-kernel - [PATCH v2 0/2] PCI: microchip: support using either instance 1 or 2

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Message-ID: <20240612-outfield-gummy-388a36d95100@spud>
Date: Wed, 12 Jun 2024 11:57:54 +0100
From: Conor Dooley <conor@...nel.org>
To: linux-pci@...r.kernel.org
Cc: conor@...nel.org,
	Conor Dooley <conor.dooley@...rochip.com>,
	Daire McNamara <daire.mcnamara@...rochip.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org
Subject: [PATCH v2 0/2] PCI: microchip: support using either instance 1 or 2

From: Conor Dooley <conor.dooley@...rochip.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.

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

CC: Daire McNamara <daire.mcnamara@...rochip.com>
CC: Lorenzo Pieralisi <lpieralisi@...nel.org>
CC: Krzysztof Wilczyński <kw@...ux.com>
CC: Rob Herring <robh@...nel.org>
CC: Bjorn Helgaas <bhelgaas@...gle.com>
CC: Krzysztof Kozlowski <krzk+dt@...nel.org>
CC: Conor Dooley <conor+dt@...nel.org>
CC: linux-pci@...r.kernel.org
CC: devicetree@...r.kernel.org
CC: linux-kernel@...r.kernel.org
CC: linux-riscv@...ts.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     |  10 +-
 drivers/pci/controller/pcie-microchip-host.c  | 155 +++++++++---------
 2 files changed, 79 insertions(+), 86 deletions(-)

-- 
2.43.0