Merge tag 'devicetree-for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull devicetree updates from Rob Herring:

 - Update dtc to upstream version v1.6.0-31-gcbca977ea121

 - dtx_diff help text reformatting

 - Speed-up validation time for binding and dtb checks using json for
   intermediate files

 - Add support for running yamllint on DT schema files

 - Remove old booting-without-of.rst

 - Extend the example schema to address common issues

 - Cleanup handling of additionalProperties/unevaluatedProperties

 - Ensure all DSI controller schemas reference dsi-controller.yaml

 - Vendor prefixes for Zealz, Wandbord/Technexion, Embest RIoT, Rex,
   DFI, and Cisco Meraki

 - Convert at25, SPMI bus, TI hwlock, HiSilicon Hi3660 USB3 PHY, Arm
   SP805 watchdog, Arm SP804, and Samsung 11-pin USB connector to DT
   schema

 - Convert HiSilicon SoC and syscon bindings to DT schema

 - Convert SiFive Risc-V L2 cache, PLIC, PRCI, and PWM to DT schema

 - Convert i.MX bindings for w1, crypto, rng, SIM, PM, DDR, SATA, vf610
   GPIO, and UART to DT schema

 - Add i.MX 8M compatible strings

 - Add LM81 and DS1780 as trivial devices

 - Various missing properties added to fix dtb validation warnings

* tag 'devicetree-for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (111 commits)
  dt-bindings: misc: explicitly add #address-cells for slave mode
  spi: dt-bindings: spi-controller: explicitly require #address-cells=<0> for slave mode
  dt: Remove booting-without-of.rst
  dt-bindings: update usb-c-connector example
  dt-bindings: arm: hisilicon: add missing properties into cpuctrl.yaml
  dt-bindings: arm: hisilicon: add missing properties into sysctrl.yaml
  dt-bindings: pwm: imx: document i.MX compatibles
  scripts/dtc: Update to upstream version v1.6.0-31-gcbca977ea121
  dt-bindings: Add running yamllint to dt_binding_check
  dt-bindings: powerpc: Add a schema for the 'sleep' property
  dt-bindings: pinctrl: sirf: Fix typo abitrary
  dt-bindings: pinctrl: qcom: Fix typo abitrary
  dt-bindings: Explicitly allow additional properties in common schemas
  dt-bindings: Use 'additionalProperties' instead of 'unevaluatedProperties'
  dt-bindings: Add missing 'unevaluatedProperties'
  Docs: Fixing spelling errors in Documentation/devicetree/bindings/
  dt-bindings: arm: hisilicon: convert Hi6220 domain controller bindings to json-schema
  dt-bindings: riscv: convert pwm bindings to json-schema
  dt-bindings: riscv: convert plic bindings to json-schema
  dt-bindings: fu540: prci: convert PRCI bindings to json-schema
  ...

2 files changed, 22 insertions, 0 deletions

diff --git a/Documentation/x86/booting-dt.rst b/Documentation/x86/booting-dt.rst
new file mode 100644
index 000000000000..965a374071ab
--- /dev/null
+++ b/Documentation/x86/booting-dt.rst
@@ -0,0 +1,21 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+DeviceTree Booting
+------------------
+
+  There is one single 32bit entry point to the kernel at code32_start,
+  the decompressor (the real mode entry point goes to the same  32bit
+  entry point once it switched into protected mode). That entry point
+  supports one calling convention which is documented in
+  Documentation/x86/boot.rst
+  The physical pointer to the device-tree block is passed via setup_data
+  which requires at least boot protocol 2.09.
+  The type filed is defined as
+
+  #define SETUP_DTB                      2
+
+  This device-tree is used as an extension to the "boot page". As such it
+  does not parse / consider data which is already covered by the boot
+  page. This includes memory size, reserved ranges, command line arguments
+  or initrd address. It simply holds information which can not be retrieved
+  otherwise like interrupt routing or a list of devices behind an I2C bus.
diff --git a/Documentation/x86/index.rst b/Documentation/x86/index.rst
index 740ee7f87898..b224d12c880b 100644
--- a/Documentation/x86/index.rst
+++ b/Documentation/x86/index.rst
@@ -9,6 +9,7 @@ x86-specific Documentation
    :numbered:
 
    boot
+   booting-dt
    cpuinfo
    topology
    exception-tables