From: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Date: Wed, 30 Sep 2020 14:36:06 +0900
Subject: PCI: dwc: Add common iATU register support
Git-commit: 13ab639ed48c1e777682d1a80097594d21a193dc
Patch-mainline: v5.10-rc1
References: bsc#1179344
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: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1601444167-11316-4-git-send-email-hayashi.kunihiko@socionext.com
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
drivers/pci/controller/dwc/pcie-designware.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index 3c1f17c78241..c2dea8fc97c8 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -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 ?
--
2.26.2