From: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
To: Bjorn Helgaas <bhelgaas@google.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Jingoo Han <jingoohan1@gmail.com>,
Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
Murali Karicheri <m-karicheri2@ti.com>,
Rob Herring <robh+dt@kernel.org>
Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Subject: [PATCH 2/3] PCI: dwc: Add common iATU register support
Date: Fri, 11 Sep 2020 17:50:02 +0900 [thread overview]
Message-ID: <1599814203-14441-3-git-send-email-hayashi.kunihiko@socionext.com> (raw)
In-Reply-To: <1599814203-14441-1-git-send-email-hayashi.kunihiko@socionext.com>
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.
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Suggested-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
---
drivers/pci/controller/dwc/pcie-designware.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index 4d105ef..4a360bc 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"
@@ -526,11 +527,16 @@ 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;
if (pci->version >= 0x480A || (!pci->version &&
dw_pcie_iatu_unroll_enabled(pci))) {
pci->iatu_unroll_enabled = true;
- if (!pci->atu_base)
+ pdev = of_find_device_by_node(np);
+ if (!pci->atu_base && pdev)
+ pci->atu_base =
+ devm_platform_ioremap_resource_byname(pdev, "atu");
+ if (IS_ERR_OR_NULL(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 ?
--
2.7.4
next prev parent reply other threads:[~2020-09-11 8:50 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-11 8:50 [PATCH 0/3] PCI: dwc: Move iATU register mapping to common framework Kunihiko Hayashi
2020-09-11 8:50 ` [PATCH 1/3] dt-bindings: PCI: uniphier: Add iATU register description Kunihiko Hayashi
2020-09-11 8:50 ` Kunihiko Hayashi [this message]
2020-09-23 15:57 ` [PATCH 2/3] PCI: dwc: Add common iATU register support Rob Herring
2020-09-25 9:10 ` Kunihiko Hayashi
2020-09-28 0:55 ` Kunihiko Hayashi
2020-09-11 8:50 ` [PATCH 3/3] PCI: keystone: Remove iATU register mapping Kunihiko Hayashi
2020-09-23 15:57 ` Rob Herring
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