Merge tag 'devicetree-for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull DeviceTree updates from Rob Herring:

 - Sync dtc with upstream version v1.4.6-21-g84e414b0b5bc. This adds new
   warnings which are either fixed or disabled by default (enabled with
   W=1).

 - Validate an untrusted offset in DT overlay function
   update_usages_of_a_phandle_reference

 - Fix a use after free error of_platform_device_destroy

 - Fix an off by 1 string errors in unittest

 - Avoid creating a struct device for OPP nodes

 - Update DT specific submitting-patches.txt with patch content and
   subject requirements.

 - Move some bindings to their proper subsystem locations

 - Add vendor prefixes for Kaohsiung, SiFive, Avnet, Wi2Wi, Logic PD,
   and ArcherMind

 - Add documentation for "no-gpio-delays" property in FSI bus GPIO
   master

 - Add compatible for r8a77990 SoC ravb ethernet block

 - More wack-a-mole removal of 'status' property in examples

* tag 'devicetree-for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (25 commits)
  dt-bindings: submitting-patches: add guidance on patch content and subject
  of: platform: stop accessing invalid dev in of_platform_device_destroy
  dt-bindings: net: ravb: Add support for r8a77990 SoC
  dt-bindings: Add vendor prefix for ArcherMind
  dt-bindings: fsi-master-gpio: Document "no-gpio-delays" property
  dt-bindings: Add vendor prefix for Logic PD
  of: overlay: validate offset from property fixups
  of: unittest: for strings, account for trailing \0 in property length field
  drm: rcar-du: disable dtc graph-endpoint warnings on DT overlays
  kbuild: disable new dtc graph and unit-address warnings
  scripts/dtc: Update to upstream version v1.4.6-21-g84e414b0b5bc
  MAINTAINERS: add keyword for devicetree overlay notifiers
  dt-bindings: define vendor prefix for Wi2Wi, Inc.
  dt-bindings: Add vendor prefix for Avnet, Inc.
  dt-bindings: Relocate Tegra20 memory controller bindings
  dt-bindings: Add "sifive" vendor prefix
  dt-bindings: exynos: move ADC binding to iio/adc/ directory
  dt-bindings: powerpc/4xx: move 4xx NDFC and EMAC bindings to subsystem directories
  dt-bindings: move various RNG bindings to rng/ directory
  dt-bindings: move various timer bindings to timer/ directory
  ...

45 files changed, 320 insertions, 49 deletions

diff --git a/Documentation/devicetree/bindings/arm/ux500/boards.txt b/Documentation/devicetree/bindings/arm/ux500/boards.txt
index 7334c24625fc..0fa429534f49 100644
--- a/Documentation/devicetree/bindings/arm/ux500/boards.txt
+++ b/Documentation/devicetree/bindings/arm/ux500/boards.txt
@@ -26,7 +26,7 @@ interrupt-controller:
         see binding for interrupt-controller/arm,gic.txt
 
 timer:
-        see binding for arm/twd.txt
+        see binding for timer/arm,twd.txt
 
 clocks:
         see binding for clocks/ux500.txt
diff --git a/Documentation/devicetree/bindings/dma/k3dma.txt b/Documentation/devicetree/bindings/dma/k3dma.txt
index 23f8d712c3ce..4945aeac4dc4 100644
--- a/Documentation/devicetree/bindings/dma/k3dma.txt
+++ b/Documentation/devicetree/bindings/dma/k3dma.txt
@@ -23,7 +23,6 @@ Controller:
                         dma-requests = <27>;
                         interrupts = <0 12 4>;
                         clocks = <&pclk>;
-                        status = "disable";
                 };
 
 Client:
diff --git a/Documentation/devicetree/bindings/dma/ti-edma.txt b/Documentation/devicetree/bindings/dma/ti-edma.txt
index 66026dcf53e1..3f15f6644527 100644
--- a/Documentation/devicetree/bindings/dma/ti-edma.txt
+++ b/Documentation/devicetree/bindings/dma/ti-edma.txt
@@ -190,7 +190,6 @@ mmc0: mmc@23000000 {
         power-domains = <&k2g_pds 0xb>;
         clocks = <&k2g_clks 0xb 1>, <&k2g_clks 0xb 2>;
         clock-names = "fck", "mmchsdb_fck";
-        status = "disabled";
 };
 
 ------------------------------------------------------------------------------
diff --git a/Documentation/devicetree/bindings/fsi/fsi-master-gpio.txt b/Documentation/devicetree/bindings/fsi/fsi-master-gpio.txt
index a767259dedad..1e442450747f 100644
--- a/Documentation/devicetree/bindings/fsi/fsi-master-gpio.txt
+++ b/Documentation/devicetree/bindings/fsi/fsi-master-gpio.txt
@@ -11,6 +11,10 @@ Optional properties:
  - trans-gpios = <gpio-descriptor>;     : GPIO for voltage translator enable
  - mux-gpios = <gpio-descriptor>;       : GPIO for pin multiplexing with other
                                           functions (eg, external FSI masters)
+ - no-gpio-delays;                      : Don't add extra delays between GPIO
+                                          accesses. This is useful when the HW
+                                          GPIO block is running at a low enough
+                                          frequency.
 
 Examples:
 
diff --git a/Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt b/Documentation/devicetree/bindings/iio/adc/samsung,exynos-adc.txt
index 6c49db7f8ad2..6c49db7f8ad2 100644
--- a/Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt
+++ b/Documentation/devicetree/bindings/iio/adc/samsung,exynos-adc.txt
diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-mc.txt b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra20-mc.txt
index f9632bacbd04..f9632bacbd04 100644
--- a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-mc.txt
+++ b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra20-mc.txt
diff --git a/Documentation/devicetree/bindings/mips/lantiq/rcu.txt b/Documentation/devicetree/bindings/mips/lantiq/rcu.txt
index a086f1e1cdd7..7f0822b4beae 100644
--- a/Documentation/devicetree/bindings/mips/lantiq/rcu.txt
+++ b/Documentation/devicetree/bindings/mips/lantiq/rcu.txt
@@ -61,7 +61,6 @@ Example of the RCU bindings on a xRX200 SoC:
                 usb_phy0: usb2-phy@18 {
                         compatible = "lantiq,xrx200-usb2-phy";
                         reg = <0x18 4>, <0x38 4>;
-                        status = "disabled";
 
                         resets = <&reset1 4 4>, <&reset0 4 4>;
                         reset-names = "phy", "ctrl";
@@ -71,7 +70,6 @@ Example of the RCU bindings on a xRX200 SoC:
                 usb_phy1: usb2-phy@34 {
                         compatible = "lantiq,xrx200-usb2-phy";
                         reg = <0x34 4>, <0x3C 4>;
-                        status = "disabled";
 
                         resets = <&reset1 5 4>, <&reset0 4 4>;
                         reset-names = "phy", "ctrl";
diff --git a/Documentation/devicetree/bindings/mmc/tmio_mmc.txt b/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
index ee978c95189d..839f469f4525 100644
--- a/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
@@ -69,7 +69,6 @@ Example: R8A7790 (R-Car H2) SDHI controller nodes
                 max-frequency = <195000000>;
                 power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
                 resets = <&cpg 314>;
-                status = "disabled";
         };
 
         sdhi1: sd@ee120000 {
@@ -83,7 +82,6 @@ Example: R8A7790 (R-Car H2) SDHI controller nodes
                 max-frequency = <195000000>;
                 power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
                 resets = <&cpg 313>;
-                status = "disabled";
         };
 
         sdhi2: sd@ee140000 {
@@ -97,7 +95,6 @@ Example: R8A7790 (R-Car H2) SDHI controller nodes
                 max-frequency = <97500000>;
                 power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
                 resets = <&cpg 312>;
-                status = "disabled";
         };
 
         sdhi3: sd@ee160000 {
@@ -111,5 +108,4 @@ Example: R8A7790 (R-Car H2) SDHI controller nodes
                 max-frequency = <97500000>;
                 power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
                 resets = <&cpg 311>;
-                status = "disabled";
         };
diff --git a/Documentation/devicetree/bindings/powerpc/4xx/ndfc.txt b/Documentation/devicetree/bindings/mtd/ibm,ndfc.txt
index 869f0b5f16e8..869f0b5f16e8 100644
--- a/Documentation/devicetree/bindings/powerpc/4xx/ndfc.txt
+++ b/Documentation/devicetree/bindings/mtd/ibm,ndfc.txt
diff --git a/Documentation/devicetree/bindings/mtd/mtk-nand.txt b/Documentation/devicetree/bindings/mtd/mtk-nand.txt
index 1c88526dedfc..c5ba6a4ba1f2 100644
--- a/Documentation/devicetree/bindings/mtd/mtk-nand.txt
+++ b/Documentation/devicetree/bindings/mtd/mtk-nand.txt
@@ -20,7 +20,6 @@ Required NFI properties:
 - interrupts:                   Interrupts of NFI.
 - clocks:                       NFI required clocks.
 - clock-names:                  NFI clocks internal name.
-- status:                       Disabled default. Then set "okay" by platform.
 - ecc-engine:                   Required ECC Engine node.
 - #address-cells:               NAND chip index, should be 1.
 - #size-cells:                  Should be 0.
@@ -34,7 +33,6 @@ Example:
                 clocks = <&pericfg CLK_PERI_NFI>,
                          <&pericfg CLK_PERI_NFI_PAD>;
                 clock-names = "nfi_clk", "pad_clk";
-                status = "disabled";
                 ecc-engine = <&bch>;
                 #address-cells = <1>;
                 #size-cells = <0>;
@@ -152,7 +150,6 @@ Required BCH properties:
 - interrupts:   Interrupts of ECC.
 - clocks:       ECC required clocks.
 - clock-names:  ECC clocks internal name.
-- status:       Disabled default. Then set "okay" by platform.
 
 Example:
 
@@ -162,5 +159,4 @@ Example:
                 interrupts = <GIC_SPI 55 IRQ_TYPE_LEVEL_LOW>;
                 clocks = <&pericfg CLK_PERI_NFI_ECC>;
                 clock-names = "nfiecc_clk";
-                status = "disabled";
         };
diff --git a/Documentation/devicetree/bindings/powerpc/4xx/emac.txt b/Documentation/devicetree/bindings/net/ibm,emac.txt
index 44b842b6ca15..44b842b6ca15 100644
--- a/Documentation/devicetree/bindings/powerpc/4xx/emac.txt
+++ b/Documentation/devicetree/bindings/net/ibm,emac.txt
diff --git a/Documentation/devicetree/bindings/net/renesas,ravb.txt b/Documentation/devicetree/bindings/net/renesas,ravb.txt
index 890526dbfc26..fac897d54423 100644
--- a/Documentation/devicetree/bindings/net/renesas,ravb.txt
+++ b/Documentation/devicetree/bindings/net/renesas,ravb.txt
@@ -21,6 +21,7 @@ Required properties:
       - "renesas,etheravb-r8a77965" for the R8A77965 SoC.
       - "renesas,etheravb-r8a77970" for the R8A77970 SoC.
       - "renesas,etheravb-r8a77980" for the R8A77980 SoC.
+      - "renesas,etheravb-r8a77990" for the R8A77990 SoC.
       - "renesas,etheravb-r8a77995" for the R8A77995 SoC.
       - "renesas,etheravb-rcar-gen3" as a fallback for the above
                 R-Car Gen3 devices.
diff --git a/Documentation/devicetree/bindings/pci/xgene-pci.txt b/Documentation/devicetree/bindings/pci/xgene-pci.txt
index 6fd2decfa66c..92490330dc1c 100644
--- a/Documentation/devicetree/bindings/pci/xgene-pci.txt
+++ b/Documentation/devicetree/bindings/pci/xgene-pci.txt
@@ -25,8 +25,6 @@ Optional properties:
 
 Example:
 
-SoC-specific DT Entry:
-
         pcie0: pcie@1f2b0000 {
                 status = "disabled";
                 device_type = "pci";
@@ -50,8 +48,3 @@ SoC-specific DT Entry:
                 clocks = <&pcie0clk 0>;
         };
 
-
-Board-specific DT Entry:
-        &pcie0 {
-                status = "ok";
-        };
diff --git a/Documentation/devicetree/bindings/pps/pps-gpio.txt b/Documentation/devicetree/bindings/pps/pps-gpio.txt
index 0de23b793657..3683874832ae 100644
--- a/Documentation/devicetree/bindings/pps/pps-gpio.txt
+++ b/Documentation/devicetree/bindings/pps/pps-gpio.txt
@@ -20,5 +20,4 @@ Example:
                 assert-falling-edge;
 
                 compatible = "pps-gpio";
-                status = "okay";
         };
diff --git a/Documentation/devicetree/bindings/pwm/pwm-omap-dmtimer.txt b/Documentation/devicetree/bindings/pwm/pwm-omap-dmtimer.txt
index 2e53324fb720..5ccfcc82da08 100644
--- a/Documentation/devicetree/bindings/pwm/pwm-omap-dmtimer.txt
+++ b/Documentation/devicetree/bindings/pwm/pwm-omap-dmtimer.txt
@@ -2,7 +2,7 @@
 
 Required properties:
 - compatible: Shall contain "ti,omap-dmtimer-pwm".
-- ti,timers: phandle to PWM capable OMAP timer. See arm/omap/timer.txt for info
+- ti,timers: phandle to PWM capable OMAP timer. See timer/ti,timer.txt for info
   about these timers.
 - #pwm-cells: Should be 3. See pwm.txt in this directory for a description of
   the cells format.
diff --git a/Documentation/devicetree/bindings/crypto/samsung,exynos-rng4.txt b/Documentation/devicetree/bindings/rng/samsung,exynos4-rng.txt
index a13fbdb4bd88..a13fbdb4bd88 100644
--- a/Documentation/devicetree/bindings/crypto/samsung,exynos-rng4.txt
+++ b/Documentation/devicetree/bindings/rng/samsung,exynos4-rng.txt
diff --git a/Documentation/devicetree/bindings/sparc_sun_oracle_rng.txt b/Documentation/devicetree/bindings/rng/sparc_sun_oracle_rng.txt
index b0b211194c71..b0b211194c71 100644
--- a/Documentation/devicetree/bindings/sparc_sun_oracle_rng.txt
+++ b/Documentation/devicetree/bindings/rng/sparc_sun_oracle_rng.txt
diff --git a/Documentation/devicetree/bindings/submitting-patches.txt b/Documentation/devicetree/bindings/submitting-patches.txt
index 274058c583dd..de0d6090c0fd 100644
--- a/Documentation/devicetree/bindings/submitting-patches.txt
+++ b/Documentation/devicetree/bindings/submitting-patches.txt
@@ -6,7 +6,14 @@ I. For patch submitters
   0) Normal patch submission rules from Documentation/process/submitting-patches.rst
      applies.
 
-  1) The Documentation/ portion of the patch should be a separate patch.
+  1) The Documentation/ and include/dt-bindings/ portion of the patch should
+     be a separate patch. The preferred subject prefix for binding patches is:
+
+       "dt-bindings: <binding dir>: ..."
+
+     The 80 characters of the subject are precious. It is recommended to not
+     use "Documentation" or "doc" because that is implied. All bindings are
+     docs. Repeating "binding" again should also be avoided.
 
   2) Submit the entire series to the devicetree mailinglist at
 
diff --git a/Documentation/devicetree/bindings/thermal/rcar-gen3-thermal.txt b/Documentation/devicetree/bindings/thermal/rcar-gen3-thermal.txt
index fdf5caa6229b..39e7d4e61a63 100644
--- a/Documentation/devicetree/bindings/thermal/rcar-gen3-thermal.txt
+++ b/Documentation/devicetree/bindings/thermal/rcar-gen3-thermal.txt
@@ -27,9 +27,9 @@ Example:
 
         tsc: thermal@e6198000 {
                 compatible = "renesas,r8a7795-thermal";
-                reg = <0 0xe6198000 0 0x68>,
-                      <0 0xe61a0000 0 0x5c>,
-                      <0 0xe61a8000 0 0x5c>;
+                reg = <0 0xe6198000 0 0x100>,
+                      <0 0xe61a0000 0 0x100>,
+                      <0 0xe61a8000 0 0x100>;
                 interrupts = <GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>,
                              <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>,
                              <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
diff --git a/Documentation/devicetree/bindings/nios2/timer.txt b/Documentation/devicetree/bindings/timer/altr,timer-1.0.txt
index 904a5846d7ac..904a5846d7ac 100644
--- a/Documentation/devicetree/bindings/nios2/timer.txt
+++ b/Documentation/devicetree/bindings/timer/altr,timer-1.0.txt
diff --git a/Documentation/devicetree/bindings/arm/arch_timer.txt b/Documentation/devicetree/bindings/timer/arm,arch_timer.txt
index 68301b77e854..68301b77e854 100644
--- a/Documentation/devicetree/bindings/arm/arch_timer.txt
+++ b/Documentation/devicetree/bindings/timer/arm,arch_timer.txt
diff --git a/Documentation/devicetree/bindings/arm/armv7m_systick.txt b/Documentation/devicetree/bindings/timer/arm,armv7m-systick.txt
index 7cf4a24601eb..7cf4a24601eb 100644
--- a/Documentation/devicetree/bindings/arm/armv7m_systick.txt
+++ b/Documentation/devicetree/bindings/timer/arm,armv7m-systick.txt
diff --git a/Documentation/devicetree/bindings/arm/global_timer.txt b/Documentation/devicetree/bindings/timer/arm,global_timer.txt
index bdae3a818793..bdae3a818793 100644
--- a/Documentation/devicetree/bindings/arm/global_timer.txt
+++ b/Documentation/devicetree/bindings/timer/arm,global_timer.txt
diff --git a/Documentation/devicetree/bindings/arm/twd.txt b/Documentation/devicetree/bindings/timer/arm,twd.txt
index 383ea19c2bf0..383ea19c2bf0 100644
--- a/Documentation/devicetree/bindings/arm/twd.txt
+++ b/Documentation/devicetree/bindings/timer/arm,twd.txt
diff --git a/Documentation/devicetree/bindings/powerpc/fsl/gtm.txt b/Documentation/devicetree/bindings/timer/fsl,gtm.txt
index 9a33efded4bc..9a33efded4bc 100644
--- a/Documentation/devicetree/bindings/powerpc/fsl/gtm.txt
+++ b/Documentation/devicetree/bindings/timer/fsl,gtm.txt
diff --git a/Documentation/devicetree/bindings/arm/mrvl/timer.txt b/Documentation/devicetree/bindings/timer/mrvl,mmp-timer.txt
index 9a6e251462e7..9a6e251462e7 100644
--- a/Documentation/devicetree/bindings/arm/mrvl/timer.txt
+++ b/Documentation/devicetree/bindings/timer/mrvl,mmp-timer.txt
diff --git a/Documentation/devicetree/bindings/arm/msm/timer.txt b/Documentation/devicetree/bindings/timer/qcom,msm-timer.txt
index 5e10c345548f..5e10c345548f 100644
--- a/Documentation/devicetree/bindings/arm/msm/timer.txt
+++ b/Documentation/devicetree/bindings/timer/qcom,msm-timer.txt
diff --git a/Documentation/devicetree/bindings/arm/spear-timer.txt b/Documentation/devicetree/bindings/timer/st,spear-timer.txt
index c0017221cf55..c0017221cf55 100644
--- a/Documentation/devicetree/bindings/arm/spear-timer.txt
+++ b/Documentation/devicetree/bindings/timer/st,spear-timer.txt
diff --git a/Documentation/devicetree/bindings/c6x/timer64.txt b/Documentation/devicetree/bindings/timer/ti,c64x+timer64.txt
index 95911fe70224..95911fe70224 100644
--- a/Documentation/devicetree/bindings/c6x/timer64.txt
+++ b/Documentation/devicetree/bindings/timer/ti,c64x+timer64.txt
diff --git a/Documentation/devicetree/bindings/arm/omap/timer.txt b/Documentation/devicetree/bindings/timer/ti,timer.txt
index d02e27c764ec..d02e27c764ec 100644
--- a/Documentation/devicetree/bindings/arm/omap/timer.txt
+++ b/Documentation/devicetree/bindings/timer/ti,timer.txt
diff --git a/Documentation/devicetree/bindings/arm/vt8500/via,vt8500-timer.txt b/Documentation/devicetree/bindings/timer/via,vt8500-timer.txt
index 901c73f0d8ef..901c73f0d8ef 100644
--- a/Documentation/devicetree/bindings/arm/vt8500/via,vt8500-timer.txt
+++ b/Documentation/devicetree/bindings/timer/via,vt8500-timer.txt
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index 74e9db9e9088..4b38f3373f43 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -32,6 +32,7 @@ andestech	Andes Technology Corporation
 apm     Applied Micro Circuits Corporation (APM)
 aptina  Aptina Imaging
 arasan  Arasan Chip Systems
+archermind ArcherMind Technology (Nanjing) Co., Ltd.
 arctic  Arctic Sand
 aries   Aries Embedded GmbH
 arm     ARM Ltd.
@@ -47,6 +48,7 @@ auvidea Auvidea GmbH
 avago   Avago Technologies
 avia    avia semiconductor
 avic    Shanghai AVIC Optoelectronics Co., Ltd.
+avnet   Avnet, Inc.
 axentia Axentia Technologies AB
 axis    Axis Communications AB
 bananapi BIPAI KEJI LIMITED
@@ -186,6 +188,7 @@ khadas	Khadas
 kiebackpeter    Kieback & Peter GmbH
 kinetic Kinetic Technologies
 kingnovel       Kingnovel Technology Co., Ltd.
+koe     Kaohsiung Opto-Electronics Inc.
 kosagi  Sutajio Ko-Usagi PTE Ltd.
 kyo     Kyocera Corporation
 lacie   LaCie
@@ -200,6 +203,7 @@ linaro	Linaro Limited
 linksys Belkin International, Inc. (Linksys)
 linux   Linux-specific binding
 lltc    Linear Technology Corporation
+logicpd Logic PD, Inc.
 lsi     LSI Corp. (LSI Logic)
 lwn     Liebherr-Werk Nenzing GmbH
 macnica Macnica Americas
@@ -320,6 +324,7 @@ sgx	SGX Sensortech
 sharp   Sharp Corporation
 shimafuji       Shimafuji Electric, Inc.
 si-en   Si-En Technology Ltd.
+sifive  SiFive, Inc.
 sigma   Sigma Designs, Inc.
 sii     Seiko Instruments, Inc.
 sil     Silicon Image
@@ -395,6 +400,7 @@ vot	Vision Optical Technology Co., Ltd.
 wd      Western Digital Corp.
 wetek   WeTek Electronics, limited.
 wexler  Wexler
+wi2wi   Wi2Wi, Inc.
 winbond Winbond Electronics corp.
 winstar Winstar Display Corp.
 wlf     Wolfson Microelectronics
diff --git a/MAINTAINERS b/MAINTAINERS
index 5c29a7dee379..d325d2dc7600 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10510,12 +10510,14 @@ F:	drivers/infiniband/ulp/opa_vnic
 
 OPEN FIRMWARE AND DEVICE TREE OVERLAYS
 M:      Pantelis Antoniou <pantelis.antoniou@konsulko.com>
+M:      Frank Rowand <frowand.list@gmail.com>
 L:      devicetree@vger.kernel.org
 S:      Maintained
 F:      Documentation/devicetree/dynamic-resolution-notes.txt
 F:      Documentation/devicetree/overlay-notes.txt
 F:      drivers/of/overlay.c
 F:      drivers/of/resolver.c
+K:      of_overlay_notifier_
 
 OPEN FIRMWARE AND FLATTENED DEVICE TREE
 M:      Rob Herring <robh+dt@kernel.org>
diff --git a/drivers/gpu/drm/rcar-du/Makefile b/drivers/gpu/drm/rcar-du/Makefile
index 3e58ed93d5b1..2a3b8d7972b5 100644
--- a/drivers/gpu/drm/rcar-du/Makefile
+++ b/drivers/gpu/drm/rcar-du/Makefile
@@ -17,3 +17,10 @@ rcar-du-drm-$(CONFIG_DRM_RCAR_VSP)	+= rcar_du_vsp.o
 obj-$(CONFIG_DRM_RCAR_DU)               += rcar-du-drm.o
 obj-$(CONFIG_DRM_RCAR_DW_HDMI)          += rcar_dw_hdmi.o
 obj-$(CONFIG_DRM_RCAR_LVDS)             += rcar_lvds.o
+
+# 'remote-endpoint' is fixed up at run-time
+DTC_FLAGS_rcar_du_of_lvds_r8a7790 += -Wno-graph_endpoint
+DTC_FLAGS_rcar_du_of_lvds_r8a7791 += -Wno-graph_endpoint
+DTC_FLAGS_rcar_du_of_lvds_r8a7793 += -Wno-graph_endpoint
+DTC_FLAGS_rcar_du_of_lvds_r8a7795 += -Wno-graph_endpoint
+DTC_FLAGS_rcar_du_of_lvds_r8a7796 += -Wno-graph_endpoint
diff --git a/drivers/of/of_numa.c b/drivers/of/of_numa.c
index f9d5480a4ae5..27d9b4bba535 100644
--- a/drivers/of/of_numa.c
+++ b/drivers/of/of_numa.c
@@ -177,7 +177,6 @@ int of_node_to_nid(struct device_node *device)
 
         return NUMA_NO_NODE;
 }
-EXPORT_SYMBOL(of_node_to_nid);
 
 int __init of_numa_init(void)
 {
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index c00d81dfac0b..0b49a62b38a3 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -32,6 +32,11 @@ const struct of_device_id of_default_bus_match_table[] = {
         {} /* Empty terminated list */
 };
 
+static const struct of_device_id of_skipped_node_table[] = {
+        { .compatible = "operating-points-v2", },
+        {} /* Empty terminated list */
+};
+
 static int of_dev_node_match(struct device *dev, void *data)
 {
         return dev->of_node == data;
@@ -356,6 +361,12 @@ static int of_platform_bus_create(struct device_node *bus,
                 return 0;
         }
 
+        /* Skip nodes for which we don't want to create devices */
+        if (unlikely(of_match_node(of_skipped_node_table, bus))) {
+                pr_debug("%s() - skipping %pOF node\n", __func__, bus);
+                return 0;
+        }
+
         if (of_node_check_flag(bus, OF_POPULATED_BUS)) {
                 pr_debug("%s() - skipping %pOF, already populated\n",
                         __func__, bus);
@@ -537,6 +548,9 @@ int of_platform_device_destroy(struct device *dev, void *data)
         if (of_node_check_flag(dev->of_node, OF_POPULATED_BUS))
                 device_for_each_child(dev, NULL, of_platform_device_destroy);
 
+        of_node_clear_flag(dev->of_node, OF_POPULATED);
+        of_node_clear_flag(dev->of_node, OF_POPULATED_BUS);
+
         if (dev->bus == &platform_bus_type)
                 platform_device_unregister(to_platform_device(dev));
 #ifdef CONFIG_ARM_AMBA
@@ -544,8 +558,6 @@ int of_platform_device_destroy(struct device *dev, void *data)
                 amba_device_unregister(to_amba_device(dev));
 #endif
 
-        of_node_clear_flag(dev->of_node, OF_POPULATED);
-        of_node_clear_flag(dev->of_node, OF_POPULATED_BUS);
         return 0;
 }
 EXPORT_SYMBOL_GPL(of_platform_device_destroy);
diff --git a/drivers/of/resolver.c b/drivers/of/resolver.c
index 65d0b7adfcd4..7edfac6f1914 100644
--- a/drivers/of/resolver.c
+++ b/drivers/of/resolver.c
@@ -122,6 +122,11 @@ static int update_usages_of_a_phandle_reference(struct device_node *overlay,
                         goto err_fail;
                 }
 
+                if (offset < 0 || offset + sizeof(__be32) > prop->length) {
+                        err = -EINVAL;
+                        goto err_fail;
+                }
+
                 *(__be32 *)(prop->value + offset) = cpu_to_be32(phandle);
         }
 
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 6bb37c18292a..ecee50d10d14 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -165,20 +165,20 @@ static void __init of_unittest_dynamic(void)
         /* Add a new property - should pass*/
         prop->name = "new-property";
         prop->value = "new-property-data";
-        prop->length = strlen(prop->value);
+        prop->length = strlen(prop->value) + 1;
         unittest(of_add_property(np, prop) == 0, "Adding a new property failed\n");
 
         /* Try to add an existing property - should fail */
         prop++;
         prop->name = "new-property";
         prop->value = "new-property-data-should-fail";
-        prop->length = strlen(prop->value);
+        prop->length = strlen(prop->value) + 1;
         unittest(of_add_property(np, prop) != 0,
                  "Adding an existing property should have failed\n");
 
         /* Try to modify an existing property - should pass */
         prop->value = "modify-property-data-should-pass";
-        prop->length = strlen(prop->value);
+        prop->length = strlen(prop->value) + 1;
         unittest(of_update_property(np, prop) == 0,
                  "Updating an existing property should have passed\n");
 
@@ -186,7 +186,7 @@ static void __init of_unittest_dynamic(void)
         prop++;
         prop->name = "modify-property";
         prop->value = "modify-missing-property-data-should-pass";
-        prop->length = strlen(prop->value);
+        prop->length = strlen(prop->value) + 1;
         unittest(of_update_property(np, prop) == 0,
                  "Updating a missing property should have passed\n");
 
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 5af34a2b0cd9..1bb594fcfe12 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -251,6 +251,9 @@ DTC_FLAGS += -Wno-unit_address_vs_reg \
         -Wno-unit_address_format \
         -Wno-avoid_unnecessary_addr_size \
         -Wno-alias_paths \
+        -Wno-graph_child_address \
+        -Wno-graph_port \
+        -Wno-unique_unit_address \
         -Wno-pci_device_reg
 endif
 
diff --git a/scripts/dtc/checks.c b/scripts/dtc/checks.c
index 815eaf140ab5..a2cc1036c915 100644
--- a/scripts/dtc/checks.c
+++ b/scripts/dtc/checks.c
@@ -255,7 +255,7 @@ static void check_duplicate_node_names(struct check *c, struct dt_info *dti,
                      child2;
                      child2 = child2->next_sibling)
                         if (streq(child->name, child2->name))
-                                FAIL(c, dti, node, "Duplicate node name");
+                                FAIL(c, dti, child2, "Duplicate node name");
 }
 ERROR(duplicate_node_names, check_duplicate_node_names, NULL);
 
@@ -317,6 +317,11 @@ static void check_unit_address_vs_reg(struct check *c, struct dt_info *dti,
         const char *unitname = get_unitname(node);
         struct property *prop = get_property(node, "reg");
 
+        if (get_subnode(node, "__overlay__")) {
+                /* HACK: Overlay fragments are a special case */
+                return;
+        }
+
         if (!prop) {
                 prop = get_property(node, "ranges");
                 if (prop && !prop->val.len)
@@ -579,6 +584,8 @@ static void fixup_phandle_references(struct check *c, struct dt_info *dti,
 
                         phandle = get_node_phandle(dt, refnode);
                         *((fdt32_t *)(prop->val.val + m->offset)) = cpu_to_fdt32(phandle);
+
+                        reference_node(refnode);
                 }
         }
 }
@@ -609,11 +616,21 @@ static void fixup_path_references(struct check *c, struct dt_info *dti,
                         path = refnode->fullpath;
                         prop->val = data_insert_at_marker(prop->val, m, path,
                                                           strlen(path) + 1);
+
+                        reference_node(refnode);
                 }
         }
 }
 ERROR(path_references, fixup_path_references, NULL, &duplicate_node_names);
 
+static void fixup_omit_unused_nodes(struct check *c, struct dt_info *dti,
+                                    struct node *node)
+{
+        if (node->omit_if_unused && !node->is_referenced)
+                delete_node(node);
+}
+ERROR(omit_unused_nodes, fixup_omit_unused_nodes, NULL, &phandle_references, &path_references);
+
 /*
  * Semantic checks
  */
@@ -1017,6 +1034,36 @@ static void check_avoid_unnecessary_addr_size(struct check *c, struct dt_info *d
 }
 WARNING(avoid_unnecessary_addr_size, check_avoid_unnecessary_addr_size, NULL, &avoid_default_addr_size);
 
+static void check_unique_unit_address(struct check *c, struct dt_info *dti,
+                                              struct node *node)
+{
+        struct node *childa;
+
+        if (node->addr_cells < 0 || node->size_cells < 0)
+                return;
+
+        if (!node->children)
+                return;
+
+        for_each_child(node, childa) {
+                struct node *childb;
+                const char *addr_a = get_unitname(childa);
+
+                if (!strlen(addr_a))
+                        continue;
+
+                for_each_child(node, childb) {
+                        const char *addr_b = get_unitname(childb);
+                        if (childa == childb)
+                                break;
+
+                        if (streq(addr_a, addr_b))
+                                FAIL(c, dti, childb, "duplicate unit-address (also used in node %s)", childa->fullpath);
+                }
+        }
+}
+WARNING(unique_unit_address, check_unique_unit_address, NULL, &avoid_default_addr_size);
+
 static void check_obsolete_chosen_interrupt_controller(struct check *c,
                                                        struct dt_info *dti,
                                                        struct node *node)
@@ -1357,6 +1404,152 @@ static void check_interrupts_property(struct check *c,
 }
 WARNING(interrupts_property, check_interrupts_property, &phandle_references);
 
+static const struct bus_type graph_port_bus = {
+        .name = "graph-port",
+};
+
+static const struct bus_type graph_ports_bus = {
+        .name = "graph-ports",
+};
+
+static void check_graph_nodes(struct check *c, struct dt_info *dti,
+                              struct node *node)
+{
+        struct node *child;
+
+        for_each_child(node, child) {
+                if (!(strprefixeq(child->name, child->basenamelen, "endpoint") ||
+                      get_property(child, "remote-endpoint")))
+                        continue;
+
+                node->bus = &graph_port_bus;
+
+                /* The parent of 'port' nodes can be either 'ports' or a device */
+                if (!node->parent->bus &&
+                    (streq(node->parent->name, "ports") || get_property(node, "reg")))
+                        node->parent->bus = &graph_ports_bus;
+
+                break;
+        }
+
+}
+WARNING(graph_nodes, check_graph_nodes, NULL);
+
+static void check_graph_child_address(struct check *c, struct dt_info *dti,
+                                      struct node *node)
+{
+        int cnt = 0;
+        struct node *child;
+
+        if (node->bus != &graph_ports_bus && node->bus != &graph_port_bus)
+                return;
+
+        for_each_child(node, child) {
+                struct property *prop = get_property(child, "reg");
+
+                /* No error if we have any non-zero unit address */
+                if (prop && propval_cell(prop) != 0)
+                        return;
+
+                cnt++;
+        }
+
+        if (cnt == 1 && node->addr_cells != -1)
+                FAIL(c, dti, node, "graph node has single child node '%s', #address-cells/#size-cells are not necessary",
+                     node->children->name);
+}
+WARNING(graph_child_address, check_graph_child_address, NULL, &graph_nodes);
+
+static void check_graph_reg(struct check *c, struct dt_info *dti,
+                            struct node *node)
+{
+        char unit_addr[9];
+        const char *unitname = get_unitname(node);
+        struct property *prop;
+
+        prop = get_property(node, "reg");
+        if (!prop || !unitname)
+                return;
+
+        if (!(prop->val.val && prop->val.len == sizeof(cell_t))) {
+                FAIL(c, dti, node, "graph node malformed 'reg' property");
+                return;
+        }
+
+        snprintf(unit_addr, sizeof(unit_addr), "%x", propval_cell(prop));
+        if (!streq(unitname, unit_addr))
+                FAIL(c, dti, node, "graph node unit address error, expected \"%s\"",
+                     unit_addr);
+
+        if (node->parent->addr_cells != 1)
+                FAIL_PROP(c, dti, node, get_property(node, "#address-cells"),
+                          "graph node '#address-cells' is %d, must be 1",
+                          node->parent->addr_cells);
+        if (node->parent->size_cells != 0)
+                FAIL_PROP(c, dti, node, get_property(node, "#size-cells"),
+                          "graph node '#size-cells' is %d, must be 0",
+                          node->parent->size_cells);
+}
+
+static void check_graph_port(struct check *c, struct dt_info *dti,
+                             struct node *node)
+{
+        if (node->bus != &graph_port_bus)
+                return;
+
+        if (!strprefixeq(node->name, node->basenamelen, "port"))
+                FAIL(c, dti, node, "graph port node name should be 'port'");
+
+        check_graph_reg(c, dti, node);
+}
+WARNING(graph_port, check_graph_port, NULL, &graph_nodes);
+
+static struct node *get_remote_endpoint(struct check *c, struct dt_info *dti,
+                                        struct node *endpoint)
+{
+        int phandle;
+        struct node *node;
+        struct property *prop;
+
+        prop = get_property(endpoint, "remote-endpoint");
+        if (!prop)
+                return NULL;
+
+        phandle = propval_cell(prop);
+        /* Give up if this is an overlay with external references */
+        if (phandle == 0 || phandle == -1)
+                return NULL;
+
+        node = get_node_by_phandle(dti->dt, phandle);
+        if (!node)
+                FAIL_PROP(c, dti, endpoint, prop, "graph phandle is not valid");
+
+        return node;
+}
+
+static void check_graph_endpoint(struct check *c, struct dt_info *dti,
+                                 struct node *node)
+{
+        struct node *remote_node;
+
+        if (!node->parent || node->parent->bus != &graph_port_bus)
+                return;
+
+        if (!strprefixeq(node->name, node->basenamelen, "endpoint"))
+                FAIL(c, dti, node, "graph endpont node name should be 'endpoint'");
+
+        check_graph_reg(c, dti, node);
+
+        remote_node = get_remote_endpoint(c, dti, node);
+        if (!remote_node)
+                return;
+
+        if (get_remote_endpoint(c, dti, remote_node) != node)
+                FAIL(c, dti, node, "graph connection to node '%s' is not bidirectional",
+                     remote_node->fullpath);
+}
+WARNING(graph_endpoint, check_graph_endpoint, NULL, &graph_nodes);
+
 static struct check *check_table[] = {
         &duplicate_node_names, &duplicate_property_names,
         &node_name_chars, &node_name_format, &property_name_chars,
@@ -1366,6 +1559,7 @@ static struct check *check_table[] = {
 
         &explicit_phandles,
         &phandle_references, &path_references,
+        &omit_unused_nodes,
 
         &address_cells_is_cell, &size_cells_is_cell, &interrupt_cells_is_cell,
         &device_type_is_string, &model_is_string, &status_is_string,
@@ -1390,6 +1584,7 @@ static struct check *check_table[] = {
 
         &avoid_default_addr_size,
         &avoid_unnecessary_addr_size,
+        &unique_unit_address,
         &obsolete_chosen_interrupt_controller,
         &chosen_node_is_root, &chosen_node_bootargs, &chosen_node_stdout_path,
 
@@ -1416,6 +1611,8 @@ static struct check *check_table[] = {
 
         &alias_paths,
 
+        &graph_nodes, &graph_child_address, &graph_port, &graph_endpoint,
+
         &always_fail,
 };
 
diff --git a/scripts/dtc/dtc-lexer.l b/scripts/dtc/dtc-lexer.l
index fd825ebba69c..615b7ec6588f 100644
--- a/scripts/dtc/dtc-lexer.l
+++ b/scripts/dtc/dtc-lexer.l
@@ -153,6 +153,13 @@ static void PRINTF(1, 2) lexical_error(const char *fmt, ...);
                         return DT_DEL_NODE;
                 }
 
+<*>"/omit-if-no-ref/"   {
+                        DPRINT("Keyword: /omit-if-no-ref/\n");
+                        DPRINT("<PROPNODENAME>\n");
+                        BEGIN(PROPNODENAME);
+                        return DT_OMIT_NO_REF;
+                }
+
 <*>{LABEL}:     {
                         DPRINT("Label: %s\n", yytext);
                         yylval.labelref = xstrdup(yytext);
diff --git a/scripts/dtc/dtc-parser.y b/scripts/dtc/dtc-parser.y
index 44af170abfea..011a5b25539a 100644
--- a/scripts/dtc/dtc-parser.y
+++ b/scripts/dtc/dtc-parser.y
@@ -63,6 +63,7 @@ extern bool treesource_error;
 %token DT_BITS
 %token DT_DEL_PROP
 %token DT_DEL_NODE
+%token DT_OMIT_NO_REF
 %token <propnodename> DT_PROPNODENAME
 %token <integer> DT_LITERAL
 %token <integer> DT_CHAR_LITERAL
@@ -190,18 +191,18 @@ devicetree:
                 }
         | devicetree DT_REF nodedef
                 {
-                        struct node *target = get_node_by_ref($1, $2);
-
-                        if (target) {
-                                merge_nodes(target, $3);
+                        /*
+                         * We rely on the rule being always:
+                         *   versioninfo plugindecl memreserves devicetree
+                         * so $-1 is what we want (plugindecl)
+                         */
+                        if ($<flags>-1 & DTSF_PLUGIN) {
+                                add_orphan_node($1, $3, $2);
                         } else {
-                                /*
-                                 * We rely on the rule being always:
-                                 *   versioninfo plugindecl memreserves devicetree
-                                 * so $-1 is what we want (plugindecl)
-                                 */
-                                if ($<flags>-1 & DTSF_PLUGIN)
-                                        add_orphan_node($1, $3, $2);
+                                struct node *target = get_node_by_ref($1, $2);
+
+                                if (target)
+                                        merge_nodes(target, $3);
                                 else
                                         ERROR(&@2, "Label or path %s not found", $2);
                         }
@@ -219,6 +220,18 @@ devicetree:
 
                         $$ = $1;
                 }
+        | devicetree DT_OMIT_NO_REF DT_REF ';'
+                {
+                        struct node *target = get_node_by_ref($1, $3);
+
+                        if (target)
+                                omit_node_if_unused(target);
+                        else
+                                ERROR(&@3, "Label or path %s not found", $3);
+
+
+                        $$ = $1;
+                }
         ;
 
 nodedef:
@@ -523,6 +536,10 @@ subnode:
                 {
                         $$ = name_node(build_node_delete(), $2);
                 }
+        | DT_OMIT_NO_REF subnode
+                {
+                        $$ = omit_node_if_unused($2);
+                }
         | DT_LABEL subnode
                 {
                         add_label(&$2->labels, $1);
diff --git a/scripts/dtc/dtc.h b/scripts/dtc/dtc.h
index 3b18a42b866e..6d667701ab6a 100644
--- a/scripts/dtc/dtc.h
+++ b/scripts/dtc/dtc.h
@@ -168,6 +168,8 @@ struct node {
 
         struct label *labels;
         const struct bus_type *bus;
+
+        bool omit_if_unused, is_referenced;
 };
 
 #define for_each_label_withdel(l0, l) \
@@ -202,6 +204,8 @@ struct property *reverse_properties(struct property *first);
 struct node *build_node(struct property *proplist, struct node *children);
 struct node *build_node_delete(void);
 struct node *name_node(struct node *node, char *name);
+struct node *omit_node_if_unused(struct node *node);
+struct node *reference_node(struct node *node);
 struct node *chain_node(struct node *first, struct node *list);
 struct node *merge_nodes(struct node *old_node, struct node *new_node);
 struct node *add_orphan_node(struct node *old_node, struct node *new_node, char *ref);
diff --git a/scripts/dtc/livetree.c b/scripts/dtc/livetree.c
index 57b7db2ed153..6e4c367f54b3 100644
--- a/scripts/dtc/livetree.c
+++ b/scripts/dtc/livetree.c
@@ -134,6 +134,20 @@ struct node *name_node(struct node *node, char *name)
         return node;
 }
 
+struct node *omit_node_if_unused(struct node *node)
+{
+        node->omit_if_unused = 1;
+
+        return node;
+}
+
+struct node *reference_node(struct node *node)
+{
+        node->is_referenced = 1;
+
+        return node;
+}
+
 struct node *merge_nodes(struct node *old_node, struct node *new_node)
 {
         struct property *new_prop, *old_prop;
@@ -224,10 +238,16 @@ struct node * add_orphan_node(struct node *dt, struct node *new_node, char *ref)
         struct data d = empty_data;
         char *name;
 
-        d = data_add_marker(d, REF_PHANDLE, ref);
-        d = data_append_integer(d, 0xffffffff, 32);
+        if (ref[0] == '/') {
+                d = data_append_data(d, ref, strlen(ref) + 1);
 
-        p = build_property("target", d);
+                p = build_property("target-path", d);
+        } else {
+                d = data_add_marker(d, REF_PHANDLE, ref);
+                d = data_append_integer(d, 0xffffffff, 32);
+
+                p = build_property("target", d);
+        }
 
         xasprintf(&name, "fragment@%u",
                         next_orphan_fragment++);
diff --git a/scripts/dtc/version_gen.h b/scripts/dtc/version_gen.h
index ad87849e333b..b00f14ff7a17 100644
--- a/scripts/dtc/version_gen.h
+++ b/scripts/dtc/version_gen.h
@@ -1 +1 @@
-#define DTC_VERSION "DTC 1.4.6-gaadd0b65"
+#define DTC_VERSION "DTC 1.4.6-g84e414b0"