Devicetree updates for v3.19-rc6
A few bugfixes for the new DT overlay feature, documentation updates, spelling corrections, and changes to MAINTAINERS. Nothing earth shattering here. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJUwnLYAAoJEMWQL496c2LNR88P/R7PbMZndqGhThzfPkbrEUx2 7Myb9TtIwOSdGnB2Q+QLplDEn5qhO/S37PjIhEq4lo07QTVvzSJY4x+SP+w5cXyC 9yfEVhsLzcQb54U7G9F5MHANgaeHMPn8p70l3MWUSMiathcc/2akG9IwD4OlxR7s CcH/wSlzd8GTPwd2k+k2OxTTRt8PexaySpa9oHd1CzKwMENMvIexm4xFXTYDEX1f tyjdcPnQWe0LbzWlOMYO/N2kXb4a+ILoB5v4YJMZXi44+1bugbGLvqlNmG1UR+5d xEMHxgt0ukzYrtrILBiTj3IZHyluIyiz142Xah0kMj2GDrGB+NouxWuTsrZt8Bql 4/9co1qAYSlD2pdoaBczaqum72OkIvFtJKJFsV8tNTk3aUVfi/RtHAqoWcSvvoZv o40VxIozMC5M14wtlPvMHF7g38mUerGL04+wXSzIUitTDZLSe5Huxg1olN0jh0zn G+1OsyleUnOwwFyN+e1lBxd03TTZu/8Jy01HJZub1106ch2ympfIm6V8i7UI1GZS RfmPE90/3JqsX9fjvCN3h4beX2mavpquPQvR85pRPsu6Fls7unSFeSU6v6J91xfb G1lhVgdj+PwUiMzOoOjzzs9sLejBf7Z6IJNtTQ3g+iBA4VwhkWc+e5JzheiHD76Q XUroHBEVAugg/iT9jmBJ =/bBX -----END PGP SIGNATURE----- Merge tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux Pull devicetree bug fixes and documentation updates from Grant Likely: "A few bugfixes for the new DT overlay feature, documentation updates, spelling corrections, and changes to MAINTAINERS. Nothing earth shattering here" * tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux: of/unittest: Overlays with sub-devices tests of/platform: Handle of_populate drivers in notifier of/overlay: Do not generate duplicate nodes devicetree: document the "qemu" and "virtio" vendor prefixes devicetree: document ARM bindings for QEMU's Firmware Config interface Documentation: of: fix typo in graph bindings dma-mapping: fix debug print to display correct dma_pfn_offset of: replace Asahi Kasei Corp vendor prefix ARM: dt: GIC: Spelling s/specific/specifier/, s/flaggs/flags/ dt/bindings: arm-boards: Spelling s/pointong/pointing/ MAINTAINERS: Update DT website and git repository MAINTAINERS: drop DT regex matching on of_get_property and of_match_table
This commit is contained in:
Linus Torvalds
commit
b8de08da04
@ -23,7 +23,7 @@ Required nodes:
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range of 0x200 bytes.
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- syscon: the root node of the Integrator platforms must have a
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system controller node pointong to the control registers,
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system controller node pointing to the control registers,
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with the compatible string
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"arm,integrator-ap-syscon"
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"arm,integrator-cp-syscon"
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72
Documentation/devicetree/bindings/arm/fw-cfg.txt
Normal file
72
Documentation/devicetree/bindings/arm/fw-cfg.txt
Normal file
@ -0,0 +1,72 @@
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* QEMU Firmware Configuration bindings for ARM
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QEMU's arm-softmmu and aarch64-softmmu emulation / virtualization targets
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provide the following Firmware Configuration interface on the "virt" machine
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type:
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- A write-only, 16-bit wide selector (or control) register,
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- a read-write, 64-bit wide data register.
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QEMU exposes the control and data register to ARM guests as memory mapped
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registers; their location is communicated to the guest's UEFI firmware in the
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DTB that QEMU places at the bottom of the guest's DRAM.
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The guest writes a selector value (a key) to the selector register, and then
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can read the corresponding data (produced by QEMU) via the data register. If
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the selected entry is writable, the guest can rewrite it through the data
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register.
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The selector register takes keys in big endian byte order.
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The data register allows accesses with 8, 16, 32 and 64-bit width (only at
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offset 0 of the register). Accesses larger than a byte are interpreted as
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arrays, bundled together only for better performance. The bytes constituting
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such a word, in increasing address order, correspond to the bytes that would
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have been transferred by byte-wide accesses in chronological order.
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The interface allows guest firmware to download various parameters and blobs
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that affect how the firmware works and what tables it installs for the guest
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OS. For example, boot order of devices, ACPI tables, SMBIOS tables, kernel and
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initrd images for direct kernel booting, virtual machine UUID, SMP information,
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virtual NUMA topology, and so on.
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The authoritative registry of the valid selector values and their meanings is
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the QEMU source code; the structure of the data blobs corresponding to the
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individual key values is also defined in the QEMU source code.
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The presence of the registers can be verified by selecting the "signature" blob
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with key 0x0000, and reading four bytes from the data register. The returned
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signature is "QEMU".
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The outermost protocol (involving the write / read sequences of the control and
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data registers) is expected to be versioned, and/or described by feature bits.
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The interface revision / feature bitmap can be retrieved with key 0x0001. The
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blob to be read from the data register has size 4, and it is to be interpreted
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as a uint32_t value in little endian byte order. The current value
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(corresponding to the above outer protocol) is zero.
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The guest kernel is not expected to use these registers (although it is
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certainly allowed to); the device tree bindings are documented here because
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this is where device tree bindings reside in general.
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Required properties:
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- compatible: "qemu,fw-cfg-mmio".
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- reg: the MMIO region used by the device.
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* Bytes 0x0 to 0x7 cover the data register.
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* Bytes 0x8 to 0x9 cover the selector register.
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* Further registers may be appended to the region in case of future interface
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revisions / feature bits.
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Example:
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/ {
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#size-cells = <0x2>;
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#address-cells = <0x2>;
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fw-cfg@9020000 {
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compatible = "qemu,fw-cfg-mmio";
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reg = <0x0 0x9020000 0x0 0xa>;
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};
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};
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@ -19,7 +19,7 @@ type of the connections, they just map their existence. Specific properties
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may be described by specialized bindings depending on the type of connection.
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To see how this binding applies to video pipelines, for example, see
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Documentation/device-tree/bindings/media/video-interfaces.txt.
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Documentation/devicetree/bindings/media/video-interfaces.txt.
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Here the ports describe data interfaces, and the links between them are
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the connecting data buses. A single port with multiple connections can
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correspond to multiple devices being connected to the same physical bus.
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@ -9,7 +9,6 @@ ad Avionic Design GmbH
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adapteva Adapteva, Inc.
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adi Analog Devices, Inc.
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aeroflexgaisler Aeroflex Gaisler AB
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ak Asahi Kasei Corp.
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allwinner Allwinner Technology Co., Ltd.
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altr Altera Corp.
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amcc Applied Micro Circuits Corporation (APM, formally AMCC)
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@ -20,6 +19,7 @@ amstaos AMS-Taos Inc.
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apm Applied Micro Circuits Corporation (APM)
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arm ARM Ltd.
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armadeus ARMadeus Systems SARL
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asahi-kasei Asahi Kasei Corp.
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atmel Atmel Corporation
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auo AU Optronics Corporation
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avago Avago Technologies
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@ -127,6 +127,7 @@ pixcir PIXCIR MICROELECTRONICS Co., Ltd
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powervr PowerVR (deprecated, use img)
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qca Qualcomm Atheros, Inc.
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qcom Qualcomm Technologies, Inc
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qemu QEMU, a generic and open source machine emulator and virtualizer
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qnap QNAP Systems, Inc.
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radxa Radxa
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raidsonic RaidSonic Technology GmbH
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@ -168,6 +169,7 @@ usi Universal Scientific Industrial Co., Ltd.
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v3 V3 Semiconductor
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variscite Variscite Ltd.
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via VIA Technologies, Inc.
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virtio Virtual I/O Device Specification, developed by the OASIS consortium
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voipac Voipac Technologies s.r.o.
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winbond Winbond Electronics corp.
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wlf Wolfson Microelectronics
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@ -696,7 +696,7 @@ L: alsa-devel@alsa-project.org (moderated for non-subscribers)
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W: http://blackfin.uclinux.org/
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S: Supported
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F: sound/soc/blackfin/*
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ANALOG DEVICES INC IIO DRIVERS
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M: Lars-Peter Clausen <lars@metafoo.de>
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M: Michael Hennerich <Michael.Hennerich@analog.com>
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@ -7024,14 +7024,12 @@ OPEN FIRMWARE AND FLATTENED DEVICE TREE
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M: Grant Likely <grant.likely@linaro.org>
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M: Rob Herring <robh+dt@kernel.org>
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L: devicetree@vger.kernel.org
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W: http://fdt.secretlab.ca
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T: git git://git.secretlab.ca/git/linux-2.6.git
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W: http://www.devicetree.org/
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T: git git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux.git
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S: Maintained
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F: drivers/of/
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F: include/linux/of*.h
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F: scripts/dtc/
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K: of_get_property
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K: of_match_table
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OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS
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M: Rob Herring <robh+dt@kernel.org>
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@ -406,7 +406,7 @@
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clock-frequency = <400000>;
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magnetometer@c {
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compatible = "ak,ak8975";
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compatible = "asahi-kasei,ak8975";
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reg = <0xc>;
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interrupt-parent = <&gpio>;
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interrupts = <TEGRA_GPIO(N, 5) IRQ_TYPE_LEVEL_HIGH>;
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@ -114,17 +114,6 @@ static int of_overlay_apply_single_device_node(struct of_overlay *ov,
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ret = of_overlay_apply_one(ov, tchild, child);
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if (ret)
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return ret;
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/* The properties are already copied, now do the child nodes */
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for_each_child_of_node(child, grandchild) {
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ret = of_overlay_apply_single_device_node(ov, tchild, grandchild);
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if (ret) {
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pr_err("%s: Failed to apply single node @%s/%s\n",
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__func__, tchild->full_name,
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grandchild->name);
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return ret;
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}
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}
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}
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return ret;
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@ -188,7 +188,7 @@ static void of_dma_configure(struct device *dev)
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size = dev->coherent_dma_mask;
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} else {
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offset = PFN_DOWN(paddr - dma_addr);
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dev_dbg(dev, "dma_pfn_offset(%#08lx)\n", dev->dma_pfn_offset);
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dev_dbg(dev, "dma_pfn_offset(%#08lx)\n", offset);
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}
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dev->dma_pfn_offset = offset;
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@ -566,6 +566,10 @@ static int of_platform_notify(struct notifier_block *nb,
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if (!of_node_check_flag(rd->dn->parent, OF_POPULATED_BUS))
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return NOTIFY_OK; /* not for us */
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/* already populated? (driver using of_populate manually) */
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if (of_node_check_flag(rd->dn, OF_POPULATED))
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return NOTIFY_OK;
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/* pdev_parent may be NULL when no bus platform device */
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pdev_parent = of_find_device_by_node(rd->dn->parent);
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pdev = of_platform_device_create(rd->dn, NULL,
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@ -581,6 +585,11 @@ static int of_platform_notify(struct notifier_block *nb,
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break;
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case OF_RECONFIG_CHANGE_REMOVE:
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/* already depopulated? */
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if (!of_node_check_flag(rd->dn, OF_POPULATED))
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return NOTIFY_OK;
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/* find our device by node */
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pdev = of_find_device_by_node(rd->dn);
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if (pdev == NULL)
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@ -176,5 +176,60 @@
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};
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};
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overlay10 {
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fragment@0 {
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target-path = "/testcase-data/overlay-node/test-bus";
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__overlay__ {
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/* suppress DTC warning */
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#address-cells = <1>;
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#size-cells = <0>;
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test-selftest10 {
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compatible = "selftest";
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status = "okay";
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reg = <10>;
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#address-cells = <1>;
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#size-cells = <0>;
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test-selftest101 {
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compatible = "selftest";
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status = "okay";
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reg = <1>;
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};
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};
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};
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};
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};
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overlay11 {
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fragment@0 {
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target-path = "/testcase-data/overlay-node/test-bus";
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__overlay__ {
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/* suppress DTC warning */
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#address-cells = <1>;
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#size-cells = <0>;
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test-selftest11 {
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compatible = "selftest";
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status = "okay";
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reg = <11>;
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#address-cells = <1>;
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#size-cells = <0>;
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test-selftest111 {
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compatible = "selftest";
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status = "okay";
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reg = <1>;
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};
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};
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};
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};
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};
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};
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};
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@ -978,6 +978,9 @@ static int selftest_probe(struct platform_device *pdev)
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}
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dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
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of_platform_populate(np, NULL, NULL, &pdev->dev);
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return 0;
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}
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@ -1385,6 +1388,39 @@ static void of_selftest_overlay_8(void)
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selftest(1, "overlay test %d passed\n", 8);
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}
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/* test insertion of a bus with parent devices */
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static void of_selftest_overlay_10(void)
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{
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int ret;
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char *child_path;
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/* device should disable */
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ret = of_selftest_apply_overlay_check(10, 10, 0, 1);
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if (selftest(ret == 0, "overlay test %d failed; overlay application\n", 10))
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return;
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child_path = kasprintf(GFP_KERNEL, "%s/test-selftest101",
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selftest_path(10));
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if (selftest(child_path, "overlay test %d failed; kasprintf\n", 10))
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return;
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ret = of_path_platform_device_exists(child_path);
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kfree(child_path);
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if (selftest(ret, "overlay test %d failed; no child device\n", 10))
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return;
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}
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/* test insertion of a bus with parent devices (and revert) */
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static void of_selftest_overlay_11(void)
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{
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int ret;
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/* device should disable */
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ret = of_selftest_apply_revert_overlay_check(11, 11, 0, 1);
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if (selftest(ret == 0, "overlay test %d failed; overlay application\n", 11))
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return;
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}
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static void __init of_selftest_overlay(void)
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{
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struct device_node *bus_np = NULL;
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@ -1433,6 +1469,9 @@ static void __init of_selftest_overlay(void)
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of_selftest_overlay_6();
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of_selftest_overlay_8();
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of_selftest_overlay_10();
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of_selftest_overlay_11();
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out:
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of_node_put(bus_np);
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}
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@ -7,14 +7,14 @@
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#include <dt-bindings/interrupt-controller/irq.h>
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/* interrupt specific cell 0 */
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/* interrupt specifier cell 0 */
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#define GIC_SPI 0
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#define GIC_PPI 1
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/*
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* Interrupt specifier cell 2.
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* The flaggs in irq.h are valid, plus those below.
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* The flags in irq.h are valid, plus those below.
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*/
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#define GIC_CPU_MASK_RAW(x) ((x) << 8)
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#define GIC_CPU_MASK_SIMPLE(num) GIC_CPU_MASK_RAW((1 << (num)) - 1)
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