linux-kernel - [PATCH v3 4/6] PCI: uniphier: Add iATU register support

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Message-Id: <1591174481-13975-5-git-send-email-hayashi.kunihiko@socionext.com>
Date:   Wed,  3 Jun 2020 17:54:39 +0900
From:   Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
To:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Rob Herring <robh+dt@...nel.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Masami Hiramatsu <masami.hiramatsu@...aro.org>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
Subject: [PATCH v3 4/6] PCI: uniphier: Add iATU register support

This gets iATU register area from reg property. 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.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
---
 drivers/pci/controller/dwc/pcie-uniphier.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c
index a8dda39..ad14e67 100644
--- a/drivers/pci/controller/dwc/pcie-uniphier.c
+++ b/drivers/pci/controller/dwc/pcie-uniphier.c
@@ -447,6 +447,11 @@ static int uniphier_pcie_probe(struct platform_device *pdev)
 	if (IS_ERR(priv->pci.dbi_base))
 		return PTR_ERR(priv->pci.dbi_base);
 
+	priv->pci.atu_base =
+		devm_platform_ioremap_resource_byname(pdev, "atu");
+	if (IS_ERR(priv->pci.atu_base))
+		priv->pci.atu_base = NULL;
+
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "link");
 	priv->base = devm_ioremap_resource(dev, res);
 	if (IS_ERR(priv->base))
-- 
2.7.4