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Date: Tue, 17 Nov 2015 16:46:04 -0800 From: Ray Jui <rjui@...adcom.com> To: Florian Fainelli <f.fainelli@...il.com>, Bjorn Helgaas <bhelgaas@...gle.com> CC: Marc Zyngier <marc.zyngier@....com>, Arnd Bergmann <arnd@...db.de>, Hauke Mehrtens <hauke@...ke-m.de>, <linux-kernel@...r.kernel.org>, <bcm-kernel-feedback-list@...adcom.com>, <linux-pci@...r.kernel.org> Subject: Re: [PATCH 2/5] PCI: iproc: Add PAXC interface support On 11/17/2015 4:34 PM, Florian Fainelli wrote: > On 17/11/15 16:31, Ray Jui wrote: >> Traditionally, all iProc PCIe root complexes use PAXB based wrapper, >> with an integrated on-chip Serdes to support external endpoint devices. >> On newer iProc platforms, a PAXC based wrapper is introduced, for >> connection with internally emulated PCIe endpoint devices in the ASIC >> >> This patch adds support for PAXC based iProc PCIe root complex in the >> iProc PCIe core driver. This change fators out common logic between >> PAXB and PAXC, and use tables to store register offsets that are >> different between PAXB and PAXC. This allows the driver to be scaled to >> support subsequent PAXC revisions in the future >> >> Signed-off-by: Ray Jui <rjui@...adcom.com> >> Reviewed-by: Scott Branden <sbranden@...adcom.com> >> --- >> drivers/pci/host/pcie-iproc-platform.c | 8 ++ >> drivers/pci/host/pcie-iproc.c | 202 +++++++++++++++++++++++++++------ >> drivers/pci/host/pcie-iproc.h | 19 ++++ >> 3 files changed, 195 insertions(+), 34 deletions(-) >> >> diff --git a/drivers/pci/host/pcie-iproc-platform.c b/drivers/pci/host/pcie-iproc-platform.c >> index c9550dc..716b56b 100644 >> --- a/drivers/pci/host/pcie-iproc-platform.c >> +++ b/drivers/pci/host/pcie-iproc-platform.c >> @@ -42,6 +42,13 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev) >> pcie->dev = &pdev->dev; >> platform_set_drvdata(pdev, pcie); >> >> + if (of_device_is_compatible(np, "brcm,iproc-pcie")) >> + pcie->type = IPROC_PCIE_PAXB; >> + else if (of_device_is_compatible(np, "brcm,iproc-pcie-paxc")) >> + pcie->type = IPROC_PCIE_PAXC; >> + else >> + return -ENODEV; > > Sorry for not noticing earlier, but typically, to avoid repeating the > same compatible string twice (once if of_device_id, and somewhere else), > you would put the type in the .data member of the of_device_id lookup > table and you could fetch this directly here. So something like this: > > static const struct of_device_id iproc_pcie_of_match_table[] = { > { .compatible = "brcm,iproc-pcie", .data = (int *)IPROC_PCIE_PAXB }, > + { .compatible = "brcm,iproc-pcie-paxc", .data = (int *)IPROC_PCIE_PAXC }, > { /* sentinel */ } > Just to confirm, if I do this, then the above code to check of_device_is_compatible becomes the following? pcie->type = (enum iproc_pcie_type)of_id->data; Thanks, Ray -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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