Commit 13ab639e authored by Kunihiko Hayashi's avatar Kunihiko Hayashi Committed by Lorenzo Pieralisi
Browse files

PCI: dwc: Add common iATU register support 



This gets iATU register area from reg property that has reg-names "atu".
In Synopsys DWC version 4.80 or later, since iATU register area is
separated from core register area, this area is necessary to get from
DT independently.

Suggested-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1601444167-11316-4-git-send-email-hayashi.kunihiko@socionext.com


Signed-off-by: default avatarKunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
parent 1ba415a2

drivers/pci/controller/dwc/pcie-designware.c

+5 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ 


#include <linux/delay.h>

#include <linux/of.h>

#include <linux/of_platform.h>

#include <linux/types.h>



#include "../../pci.h"
@@ -548,11 +549,15 @@ void dw_pcie_setup(struct dw_pcie *pci) 
	u32 val;

	struct device *dev = pci->dev;

	struct device_node *np = dev->of_node;

	struct platform_device *pdev = to_platform_device(dev);



	if (pci->version >= 0x480A || (!pci->version &&

				       dw_pcie_iatu_unroll_enabled(pci))) {

		pci->iatu_unroll_enabled = true;

		if (!pci->atu_base)

			pci->atu_base =

			    devm_platform_ioremap_resource_byname(pdev, "atu");

		if (IS_ERR(pci->atu_base))

			pci->atu_base = pci->dbi_base + DEFAULT_DBI_ATU_OFFSET;

	}

	dev_dbg(pci->dev, "iATU unroll: %s\n", pci->iatu_unroll_enabled ?