[PATCH 2/3] PCI: dwc: Add common iATU register support
From: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Date: 2020-09-11 08:50:28
Also in:
linux-devicetree, linux-pci, lkml
Subsystem:
pci driver for synopsys designware, pci native host bridge and endpoint drivers, pci subsystem, the rest · Maintainers:
Jingoo Han, Manivannan Sadhasivam, Lorenzo Pieralisi, Krzysztof Wilczyński, Bjorn Helgaas, Linus Torvalds
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 <redacted> Cc: Jingoo Han <jingoohan1@gmail.com> Cc: Gustavo Pimentel <redacted> 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
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