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![]() With recent proposed changes for U-Boot it is possible that bootloader won't initialize the PHY for this controller (currently the PHY is initialized regardless whether PCI is used in U-Boot, but with these proposed changes the PHY is initialized only on request). Since the mvebu-a3700-comphy driver by Miquèl Raynal supports enabling PCIe PHY, and since Linux' functionality should be independent on what bootloader did, add code for enabling generic PHY if found in device OF node. The mvebu-a3700-comphy driver does PHY powering via SMC calls to ARM Trusted Firmware. The corresponding code in ARM Trusted Firmware skips one register write which U-Boot does not: step 7 ("Enable TX"), see [1]. Instead ARM Trusted Firmware expects PCIe driver to do this step, probably because the register is in PCIe controller address space, instead of PHY address space. We therefore add this step into the advk_pcie_setup_hw function. [1] https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/tree/drivers/marvell/comphy/phy-comphy-3700.c?h=v2.3-rc2#n836 Link: https://lore.kernel.org/r/20200430080625.26070-8-pali@kernel.org Tested-by: Tomasz Maciej Nowak <tmn505@gmail.com> Signed-off-by: Marek Behún <marek.behun@nic.cz> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Rob Herring <robh@kernel.org> Acked-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Cc: Miquèl Raynal <miquel.raynal@bootlin.com> |
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.. | ||
controller | ||
endpoint | ||
hotplug | ||
pcie | ||
switch | ||
access.c | ||
ats.c | ||
bus.c | ||
ecam.c | ||
host-bridge.c | ||
iov.c | ||
irq.c | ||
Kconfig | ||
Makefile | ||
mmap.c | ||
msi.c | ||
of.c | ||
p2pdma.c | ||
pci-acpi.c | ||
pci-bridge-emul.c | ||
pci-bridge-emul.h | ||
pci-driver.c | ||
pci-label.c | ||
pci-mid.c | ||
pci-pf-stub.c | ||
pci-stub.c | ||
pci-sysfs.c | ||
pci.c | ||
pci.h | ||
probe.c | ||
proc.c | ||
quirks.c | ||
remove.c | ||
rom.c | ||
search.c | ||
setup-bus.c | ||
setup-irq.c | ||
setup-res.c | ||
slot.c | ||
syscall.c | ||
vc.c | ||
vpd.c | ||
xen-pcifront.c |