[v3,3/4] PCI: dwc: Add common iATU register support
diff mbox series

Message ID 1601444167-11316-4-git-send-email-hayashi.kunihiko@socionext.com
State Accepted
Commit 13ab639ed48c1e777682d1a80097594d21a193dc
Headers show
Series
  • PCI: dwc: Move iATU register mapping to common framework
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Commit Message

Kunihiko Hayashi Sept. 30, 2020, 5:36 a.m. UTC
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(+)

Comments

Rob Herring Sept. 30, 2020, 12:49 p.m. UTC | #1
On Wed, Sep 30, 2020 at 12:36 AM Kunihiko Hayashi
<hayashi.kunihiko@socionext.com> wrote:
>
> 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(+)

Reviewed-by: Rob Herring <robh@kernel.org>

Patch
diff mbox series

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 ?