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From: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
To: Rob Herring <robh+dt@kernel.org>,
	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>
Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Masami Hiramatsu <masami.hiramatsu@linaro.org>,
	Jassi Brar <jaswinder.singh@linaro.org>,
	Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Subject: [PATCH v3 3/4] PCI: dwc: Add common iATU register support
Date: Wed, 30 Sep 2020 14:36:06 +0900	[thread overview]
Message-ID: <1601444167-11316-4-git-send-email-hayashi.kunihiko@socionext.com> (raw)
In-Reply-To: <1601444167-11316-1-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 | 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 3fe859f..b6b39af 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 ?
-- 
2.7.4


  parent reply	other threads:[~2020-09-30  5:36 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-30  5:36 [PATCH v3 0/4] PCI: dwc: Move iATU register mapping to common framework Kunihiko Hayashi
2020-09-30  5:36 ` [PATCH v3 1/4] dt-bindings: PCI: uniphier: Add iATU register description Kunihiko Hayashi
2020-09-30  5:36 ` [PATCH v3 2/4] dt-bindings: PCI: uniphier-ep: " Kunihiko Hayashi
2020-09-30 12:48   ` Rob Herring
2020-09-30  5:36 ` Kunihiko Hayashi [this message]
2020-09-30 12:49   ` [PATCH v3 3/4] PCI: dwc: Add common iATU register support Rob Herring
2020-09-30  5:36 ` [PATCH v3 4/4] PCI: keystone: Remove iATU register mapping Kunihiko Hayashi
2020-10-08 11:23 ` [PATCH v3 0/4] PCI: dwc: Move iATU register mapping to common framework Lorenzo Pieralisi

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