[PATCH v1 0/3] PCI: brcmstb: Clkreq# accomodations of downstream device

From: Jim Quinlan <jim2101024@gmail.com>
To: linux-pci@vger.kernel.org,
	Nicolas Saenz Julienne <nsaenz@kernel.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Cyril Brulebois <kibi@debian.org>,
	Phil Elwell <phil@raspberrypi.com>,
	bcm-kernel-feedback-list@broadcom.com, jim2101024@gmail.com,
	james.quinlan@broadcom.com
Cc: devicetree@vger.kernel.org (open list:OPEN FIRMWARE AND
	FLATTENED DEVICE TREE BINDINGS),
	linux-arm-kernel@lists.infradead.org (moderated list:BROADCOM
	BCM2711/BCM2835 ARM ARCHITECTURE),
	linux-kernel@vger.kernel.org (open list),
	linux-rpi-kernel@lists.infradead.org (moderated list:BROADCOM
	BCM2711/BCM2835 ARM ARCHITECTURE), Rob Herring <robh@kernel.org>
Subject: [PATCH v1 0/3] PCI: brcmstb: Clkreq# accomodations of downstream device
Date: Thu,  6 Apr 2023 08:46:21 -0400	[thread overview]
Message-ID: <20230406124625.41325-1-jim2101024@gmail.com> (raw)

The current driver assumes the downstream devices can provide clkreq# for
ASPM.  These commits accomodate devices w/ or w/o clkreq# and also handle
L1SS-capable devices.

The Raspian Linux folks have already been using a PCIe RC property
"brcm,enable-l1ss".  These commits use the same property, in a
backward-compatible manner, and the implementaion adds more detail and also
automatically identifies devices w/o a clkreq# signal, i.e. most devices
plugged into an RPi CM4 IO board.

Jim Quinlan (3):
  dt-bindings: PCI: brcmstb: Add two optional props
  PCI: brcmstb: Clkreq# accomodations of downstream device
  PCI: brcmstb: Allow setting the completion timeout

 .../bindings/pci/brcm,stb-pcie.yaml           | 12 +++
 drivers/pci/controller/pcie-brcmstb.c         | 93 +++++++++++++++++--
 2 files changed, 95 insertions(+), 10 deletions(-)

base-commit: 99ddf2254febae9eab7fb0bcc02c5322243f5c49
-- 
2.17.1