From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
To: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: f.fainelli@gmail.com, robh+dt@kernel.org, robin.murphy@arm.com,
ardb@kernel.org, hch@infradead.org, narmstrong@baylibre.com,
dwmw2@infradead.org, linux@armlinux.org.uk,
catalin.marinas@arm.com, arnd@arndb.de, will@kernel.org,
Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Subject: [RFC 03/13] of: device: Introduce of_mmio_configure()
Date: Fri, 26 Feb 2021 15:02:55 +0100 [thread overview]
Message-ID: <20210226140305.26356-4-nsaenzjulienne@suse.de> (raw)
In-Reply-To: <20210226140305.26356-1-nsaenzjulienne@suse.de>
The function will traverse a device's bus hierarchy looking for MMIO
limited buses. If found it'll populate the relevant struct device
quirks.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
drivers/of/device.c | 19 +++++++++++++++++++
include/linux/of_device.h | 8 ++++++++
2 files changed, 27 insertions(+)
diff --git a/drivers/of/device.c b/drivers/of/device.c
index 6cb86de404f1..b80367a2764b 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -169,6 +169,25 @@ int of_dma_configure_id(struct device *dev, struct device_node *np,
}
EXPORT_SYMBOL_GPL(of_dma_configure_id);
+int of_mmio_configure(struct device *dev, struct device_node *np)
+{
+#if defined(CONFIG_ARCH_HAS_64BIT_MMIO_BROKEN)
+ struct device_node *node = of_node_get(np);
+
+ do {
+ if (of_property_read_bool(node, "64bit-mmio-broken")) {
+ dev->mmio_64bit_broken = true;
+ dev_dbg(dev, "device behind 64bit mmio broken bus\n");
+ break;
+ }
+ } while ((node = of_get_next_parent(node)));
+
+ of_node_put(node);
+#endif
+ return 0;
+}
+EXPORT_SYMBOL_GPL(of_mmio_configure);
+
int of_device_register(struct platform_device *pdev)
{
device_initialize(&pdev->dev);
diff --git a/include/linux/of_device.h b/include/linux/of_device.h
index 1d7992a02e36..c465edd509c7 100644
--- a/include/linux/of_device.h
+++ b/include/linux/of_device.h
@@ -56,6 +56,9 @@ static inline int of_dma_configure(struct device *dev,
{
return of_dma_configure_id(dev, np, force_dma, NULL);
}
+
+int of_mmio_configure(struct device *dev, struct device_node *np);
+
#else /* CONFIG_OF */
static inline int of_driver_match_device(struct device *dev,
@@ -112,6 +115,11 @@ static inline int of_dma_configure(struct device *dev,
{
return 0;
}
+
+static inline int of_mmio_configure(struct device *dev, struct device_node *np);
+{
+ return 0;
+}
#endif /* CONFIG_OF */
#endif /* _LINUX_OF_DEVICE_H */
--
2.30.1
next prev parent reply other threads:[~2021-02-26 14:05 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-26 14:02 [RFC 00/13] Generic way of dealing with broken 64-bit buses Nicolas Saenz Julienne
2021-02-26 14:02 ` [RFC 01/13] dt-bindings: Introduce 64bit-mmio-broken Nicolas Saenz Julienne
2021-02-26 14:02 ` [RFC 02/13] driver core: Introduce MMIO configuration Nicolas Saenz Julienne
2021-03-02 11:29 ` Robin Murphy
2021-03-02 14:09 ` Nicolas Saenz Julienne
2021-02-26 14:02 ` Nicolas Saenz Julienne [this message]
2021-02-26 14:02 ` [RFC 04/13] driver core: plafrom: Introduce platform_mmio_configure() Nicolas Saenz Julienne
2021-02-26 14:02 ` [RFC 05/13] pci: Introduce pci_mmio_configure() Nicolas Saenz Julienne
2021-02-26 14:02 ` [RFC 06/13] device core: Introduce dev_64bit_mmio_supported() Nicolas Saenz Julienne
2021-02-26 14:02 ` [RFC 07/13] arm64: Mark ARCH_MVEBU as needing broken 64bit MMIO support Nicolas Saenz Julienne
2021-02-26 14:03 ` [RFC 08/13] arm64: dts: marvell: armada-ap80x: Mark config-space bus as 64bit-mmio-broken Nicolas Saenz Julienne
2021-02-26 14:03 ` [RFC 09/13] iommu/arm-smmu: Make use of dev_64bit_mmio_supported() Nicolas Saenz Julienne
2021-03-02 9:32 ` Arnd Bergmann
2021-03-02 12:42 ` Nicolas Saenz Julienne
2021-03-02 11:07 ` Robin Murphy
2021-03-02 13:38 ` Nicolas Saenz Julienne
2021-03-03 8:44 ` Arnd Bergmann
2021-02-26 14:03 ` [RFC 10/13] iommu/arm-smmu-impl: Get rid of Marvell's implementation details Nicolas Saenz Julienne
2021-03-02 11:40 ` Robin Murphy
2021-03-02 14:06 ` Nicolas Saenz Julienne
2021-02-26 14:03 ` [RFC 11/13] arm64: Mark ARCH_BCM2835 as needing broken 64bit MMIO support Nicolas Saenz Julienne
2021-02-26 14:03 ` [RFC 12/13] ARM: dts: bcm2711: Mark PCIe bus as 64bit-mmio-broken Nicolas Saenz Julienne
2021-02-26 14:03 ` [RFC 13/13] scsi: megaraid: Make use of dev_64bit_mmio_supported() Nicolas Saenz Julienne
2021-02-26 14:30 ` Arnd Bergmann
2021-02-26 18:06 ` Arnd Bergmann
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