Merge tag 'omap-for-v5.16/gpmc-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into arm/dt

Changes for omap gpmc bindings and devicetree files for v5.16

A series of changes to update the gpmc related bindings to yaml
format, and a few non-urgent dts fixes.

* tag 'omap-for-v5.16/gpmc-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: dts: omap: fix gpmc,mux-add-data type
ARM: dts: omap: Fix boolean properties gpmc,cycle2cycle-{same|diff}csen
dt-bindings: memory-controllers: ti,gpmc: Convert to yaml
dt-bindings: mtd: ti,gpmc-onenand: Convert to yaml
dt-bindings: mtd: ti,gpmc-nand: Convert to yaml
dt-bindings: memory-controllers: Introduce ti,gpmc-child
dt-bindings: net: Remove gpmc-eth.txt
dt-bindings: mtd: Remove gpmc-nor.txt

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Arnd Bergmann <[e-mail]>

Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt

···
-Device tree bindings for OMAP general purpose memory controllers (GPMC)
-
-The actual devices are instantiated from the child nodes of a GPMC node.
-
-Required properties:
-
- - compatible:		Should be set to one of the following:
-
-			ti,omap2420-gpmc (omap2420)
-			ti,omap2430-gpmc (omap2430)
-			ti,omap3430-gpmc (omap3430 & omap3630)
-			ti,omap4430-gpmc (omap4430 & omap4460 & omap543x)
-			ti,am3352-gpmc   (am335x devices)
-
- - reg:			A resource specifier for the register space
-			(see the example below)
- - ti,hwmods:		Should be set to "ti,gpmc" until the DT transition is
-			completed.
- - #address-cells:	Must be set to 2 to allow memory address translation
- - #size-cells:		Must be set to 1 to allow CS address passing
- - gpmc,num-cs:		The maximum number of chip-select lines that controller
-			can support.
- - gpmc,num-waitpins:	The maximum number of wait pins that controller can
-			support.
- - ranges:		Must be set up to reflect the memory layout with four
-			integer values for each chip-select line in use:
-
-			   <cs-number> 0 <physical address of mapping> <size>
-
-			Currently, calculated values derived from the contents
-			of the per-CS register GPMC_CONFIG7 (as set up by the
-			bootloader) are used for the physical address decoding.
-			As this will change in the future, filling correct
-			values here is a requirement.
- - interrupt-controller: The GPMC driver implements and interrupt controller for
-			the NAND events "fifoevent" and "termcount" plus the
-			rising/falling edges on the GPMC_WAIT pins.
-			The interrupt number mapping is as follows
-			0 - NAND_fifoevent
-			1 - NAND_termcount
-			2 - GPMC_WAIT0 pin edge
-			3 - GPMC_WAIT1 pin edge, and so on.
- - interrupt-cells:	Must be set to 2
- - gpio-controller:	The GPMC driver implements a GPIO controller for the
-			GPMC WAIT pins that can be used as general purpose inputs.
-			0 maps to GPMC_WAIT0 pin.
- - gpio-cells:		Must be set to 2
-
-Required properties when using NAND prefetch dma:
- - dmas			GPMC NAND prefetch dma channel
- - dma-names		Must be set to "rxtx"
-
-Timing properties for child nodes. All are optional and default to 0.
-
- - gpmc,sync-clk-ps:	Minimum clock period for synchronous mode, in picoseconds
-
- Chip-select signal timings (in nanoseconds) corresponding to GPMC_CONFIG2:
- - gpmc,cs-on-ns:	Assertion time
- - gpmc,cs-rd-off-ns:	Read deassertion time
- - gpmc,cs-wr-off-ns:	Write deassertion time
-
- ADV signal timings (in nanoseconds) corresponding to GPMC_CONFIG3:
- - gpmc,adv-on-ns:	Assertion time
- - gpmc,adv-rd-off-ns:	Read deassertion time
- - gpmc,adv-wr-off-ns:	Write deassertion time
- - gpmc,adv-aad-mux-on-ns:	Assertion time for AAD
- - gpmc,adv-aad-mux-rd-off-ns:	Read deassertion time for AAD
- - gpmc,adv-aad-mux-wr-off-ns:	Write deassertion time for AAD
-
- WE signals timings (in nanoseconds) corresponding to GPMC_CONFIG4:
- - gpmc,we-on-ns	Assertion time
- - gpmc,we-off-ns:	Deassertion time
-
- OE signals timings (in nanoseconds) corresponding to GPMC_CONFIG4:
- - gpmc,oe-on-ns:	Assertion time
- - gpmc,oe-off-ns:	Deassertion time
- - gpmc,oe-aad-mux-on-ns:	Assertion time for AAD
- - gpmc,oe-aad-mux-off-ns:	Deassertion time for AAD
-
- Access time and cycle time timings (in nanoseconds) corresponding to
- GPMC_CONFIG5:
- - gpmc,page-burst-access-ns: 	Multiple access word delay
- - gpmc,access-ns:		Start-cycle to first data valid delay
- - gpmc,rd-cycle-ns:		Total read cycle time
- - gpmc,wr-cycle-ns:		Total write cycle time
- - gpmc,bus-turnaround-ns:	Turn-around time between successive accesses
- - gpmc,cycle2cycle-delay-ns:	Delay between chip-select pulses
- - gpmc,clk-activation-ns: 	GPMC clock activation time
- - gpmc,wait-monitoring-ns:	Start of wait monitoring with regard to valid
-				data
-
-Boolean timing parameters. If property is present parameter enabled and
-disabled if omitted:
- - gpmc,adv-extra-delay:	ADV signal is delayed by half GPMC clock
- - gpmc,cs-extra-delay:		CS signal is delayed by half GPMC clock
- - gpmc,cycle2cycle-diffcsen:	Add "cycle2cycle-delay" between successive
-				accesses to a different CS
- - gpmc,cycle2cycle-samecsen:	Add "cycle2cycle-delay" between successive
-				accesses to the same CS
- - gpmc,oe-extra-delay:		OE signal is delayed by half GPMC clock
- - gpmc,we-extra-delay:		WE signal is delayed by half GPMC clock
- - gpmc,time-para-granularity:	Multiply all access times by 2
-
-The following are only applicable to OMAP3+ and AM335x:
- - gpmc,wr-access-ns:		In synchronous write mode, for single or
-				burst accesses, defines the number of
-				GPMC_FCLK cycles from start access time
-				to the GPMC_CLK rising edge used by the
-				memory device for the first data capture.
- - gpmc,wr-data-mux-bus-ns:	In address-data multiplex mode, specifies
-				the time when the first data is driven on
-				the address-data bus.
-
-GPMC chip-select settings properties for child nodes. All are optional.
-
-- gpmc,burst-length	Page/burst length. Must be 4, 8 or 16.
-- gpmc,burst-wrap	Enables wrap bursting
-- gpmc,burst-read	Enables read page/burst mode
-- gpmc,burst-write	Enables write page/burst mode
-- gpmc,device-width	Total width of device(s) connected to a GPMC
-			chip-select in bytes. The GPMC supports 8-bit
-			and 16-bit devices and so this property must be
-			1 or 2.
-- gpmc,mux-add-data	Address and data multiplexing configuration.
-			Valid values are 1 for address-address-data
-			multiplexing mode and 2 for address-data
-			multiplexing mode.
-- gpmc,sync-read	Enables synchronous read. Defaults to asynchronous
-			is this is not set.
-- gpmc,sync-write	Enables synchronous writes. Defaults to asynchronous
-			is this is not set.
-- gpmc,wait-pin		Wait-pin used by client. Must be less than
-			"gpmc,num-waitpins".
-- gpmc,wait-on-read	Enables wait monitoring on reads.
-- gpmc,wait-on-write	Enables wait monitoring on writes.
-
-Example for an AM33xx board:
-
-	gpmc: gpmc@50000000 {
-		compatible = "ti,am3352-gpmc";
-		ti,hwmods = "gpmc";
-		reg = <0x50000000 0x2000>;
-		interrupts = <100>;
-		dmas = <&edma 52 0>;
-		dma-names = "rxtx";
-		gpmc,num-cs = <8>;
-		gpmc,num-waitpins = <2>;
-		#address-cells = <2>;
-		#size-cells = <1>;
-		ranges = <0 0 0x08000000 0x10000000>; /* CS0 @addr 0x8000000, size 0x10000000 */
-		interrupt-controller;
-		#interrupt-cells = <2>;
-		gpio-controller;
-		#gpio-cells = <2>;
-
-		/* child nodes go here */
-	};

Documentation/devicetree/bindings/memory-controllers/ti,gpmc-child.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/memory-controllers/ti,gpmc-child.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: device tree bindings for children of the Texas Instruments GPMC
+
+maintainers:
+  - Tony Lindgren <[e-mail]>
+  - Roger Quadros <[e-mail]>
+
+description:
+  This binding is meant for the child nodes of the GPMC node. The node
+  represents any device connected to the GPMC bus. It may be a Flash chip,
+  RAM chip or Ethernet controller, etc. These properties are meant for
+  configuring the GPMC settings/timings and will accompany the bindings
+  supported by the respective device.
+
+properties:
+  reg: true
+
+# GPMC Timing properties for child nodes. All are optional and default to 0.
+  gpmc,sync-clk-ps:
+    description: Minimum clock period for synchronous mode
+    default: 0
+
+# Chip-select signal timings corresponding to GPMC_CONFIG2:
+  gpmc,cs-on-ns:
+    description: Assertion time
+    default: 0
+
+  gpmc,cs-rd-off-ns:
+    description: Read deassertion time
+    default: 0
+
+  gpmc,cs-wr-off-ns:
+    description: Write deassertion time
+    default: 0
+
+# ADV signal timings corresponding to GPMC_CONFIG3:
+  gpmc,adv-on-ns:
+    description: Assertion time
+    default: 0
+
+  gpmc,adv-rd-off-ns:
+    description: Read deassertion time
+    default: 0
+
+  gpmc,adv-wr-off-ns:
+    description: Write deassertion time
+    default: 0
+
+  gpmc,adv-aad-mux-on-ns:
+    description: Assertion time for AAD
+    default: 0
+
+  gpmc,adv-aad-mux-rd-off-ns:
+    description: Read deassertion time for AAD
+    default: 0
+
+  gpmc,adv-aad-mux-wr-off-ns:
+    description: Write deassertion time for AAD
+    default: 0
+
+# WE signals timings corresponding to GPMC_CONFIG4:
+  gpmc,we-on-ns:
+    description: Assertion time
+    default: 0
+
+  gpmc,we-off-ns:
+    description: Deassertion time
+    default: 0
+
+# OE signals timings corresponding to GPMC_CONFIG4:
+  gpmc,oe-on-ns:
+    description: Assertion time
+    default: 0
+
+  gpmc,oe-off-ns:
+    description: Deassertion time
+    default: 0
+
+  gpmc,oe-aad-mux-on-ns:
+    description: Assertion time for AAD
+    default: 0
+
+  gpmc,oe-aad-mux-off-ns:
+    description: Deassertion time for AAD
+    default: 0
+
+# Access time and cycle time timings (in nanoseconds) corresponding to
+# GPMC_CONFIG5:
+  gpmc,page-burst-access-ns:
+    description: Multiple access word delay
+    default: 0
+
+  gpmc,access-ns:
+    description: Start-cycle to first data valid delay
+    default: 0
+
+  gpmc,rd-cycle-ns:
+    description: Total read cycle time
+    default: 0
+
+  gpmc,wr-cycle-ns:
+    description: Total write cycle time
+    default: 0
+
+  gpmc,bus-turnaround-ns:
+    description: Turn-around time between successive accesses
+    default: 0
+
+  gpmc,cycle2cycle-delay-ns:
+    description: Delay between chip-select pulses
+    default: 0
+
+  gpmc,clk-activation-ns:
+    description: GPMC clock activation time
+    default: 0
+
+  gpmc,wait-monitoring-ns:
+    description: Start of wait monitoring with regard to valid data
+    default: 0
+
+# Boolean timing parameters. If property is present, parameter is enabled
+# otherwise disabled.
+  gpmc,adv-extra-delay:
+    description: ADV signal is delayed by half GPMC clock
+    type: boolean
+
+  gpmc,cs-extra-delay:
+    description: CS signal is delayed by half GPMC clock
+    type: boolean
+
+  gpmc,cycle2cycle-diffcsen:
+    description: |
+      Add "cycle2cycle-delay" between successive accesses
+      to a different CS
+    type: boolean
+
+  gpmc,cycle2cycle-samecsen:
+    description: |
+      Add "cycle2cycle-delay" between successive accesses
+      to the same CS
+    type: boolean
+
+  gpmc,oe-extra-delay:
+    description: OE signal is delayed by half GPMC clock
+    type: boolean
+
+  gpmc,we-extra-delay:
+    description: WE signal is delayed by half GPMC clock
+    type: boolean
+
+  gpmc,time-para-granularity:
+    description: Multiply all access times by 2
+    type: boolean
+
+# The following two properties are applicable only to OMAP3+ and AM335x:
+  gpmc,wr-access-ns:
+    description: |
+      In synchronous write mode, for single or
+      burst accesses, defines the number of
+      GPMC_FCLK cycles from start access time
+      to the GPMC_CLK rising edge used by the
+      memory device for the first data capture.
+    default: 0
+
+  gpmc,wr-data-mux-bus-ns:
+    description: |
+      In address-data multiplex mode, specifies
+      the time when the first data is driven on
+      the address-data bus.
+    default: 0
+
+# GPMC chip-select settings properties for child nodes. All are optional.
+  gpmc,burst-length:
+    description: Page/burst length.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 4, 8, 16]
+    default: 0
+
+  gpmc,burst-wrap:
+    description: Enables wrap bursting
+    type: boolean
+
+  gpmc,burst-read:
+    description: Enables read page/burst mode
+    type: boolean
+
+  gpmc,burst-write:
+    description: Enables write page/burst mode
+    type: boolean
+
+  gpmc,device-width:
+    description: |
+      Total width of device(s) connected to a GPMC
+      chip-select in bytes. The GPMC supports 8-bit
+      and 16-bit devices and so this property must be
+      1 or 2.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [1, 2]
+    default: 1
+
+  gpmc,mux-add-data:
+    description: |
+      Address and data multiplexing configuration.
+      Valid values are
+      0 for Non multiplexed mode
+      1 for address-address-data multiplexing mode and
+      2 for address-data multiplexing mode.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1, 2]
+
+  gpmc,sync-read:
+    description: |
+      Enables synchronous read. Defaults to asynchronous
+      is this is not set.
+    type: boolean
+
+  gpmc,sync-write:
+    description: |
+      Enables synchronous writes. Defaults to asynchronous
+      is this is not set.
+    type: boolean
+
+  gpmc,wait-pin:
+    description: |
+      Wait-pin used by client. Must be less than "gpmc,num-waitpins".
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  gpmc,wait-on-read:
+    description: Enables wait monitoring on reads.
+    type: boolean
+
+  gpmc,wait-on-write:
+    description: Enables wait monitoring on writes.
+    type: boolean
+
+required:
+  - reg
+
+# the GPMC child will have its own native properties
+additionalProperties: true

Documentation/devicetree/bindings/memory-controllers/ti,gpmc.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/memory-controllers/ti,gpmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments GPMC Memory Controller device-tree bindings
+
+maintainers:
+  - Tony Lindgren <[e-mail]>
+  - Roger Quadros <[e-mail]>
+
+description:
+  The GPMC is a unified memory controller dedicated for interfacing
+  with external memory devices like
+  - Asynchronous SRAM-like memories and ASICs
+  - Asynchronous, synchronous, and page mode burst NOR flash
+  - NAND flash
+  - Pseudo-SRAM devices
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - ti,am3352-gpmc
+          - ti,omap2420-gpmc
+          - ti,omap2430-gpmc
+          - ti,omap3430-gpmc
+          - ti,omap4430-gpmc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+    description: |
+      Functional clock. Used for bus timing calculations and
+      GPMC configuration.
+
+  clock-names:
+    items:
+      - const: fck
+
+  dmas:
+    items:
+      - description: DMA channel for GPMC NAND prefetch
+
+  dma-names:
+    items:
+      - const: rxtx
+
+  "#address-cells": true
+
+  "#size-cells": true
+
+  gpmc,num-cs:
+    description: maximum number of supported chip-select lines.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  gpmc,num-waitpins:
+    description: maximum number of supported wait pins.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  ranges:
+    minItems: 1
+    description: |
+      Must be set up to reflect the memory layout with four
+      integer values for each chip-select line in use,
+      <cs-number> 0 <physical address of mapping> <size>
+    items:
+      - description: NAND bank 0
+      - description: NOR/SRAM bank 0
+      - description: NOR/SRAM bank 1
+
+  '#interrupt-cells':
+    const: 2
+
+  interrupt-controller:
+    description: |
+      The GPMC driver implements and interrupt controller for
+      the NAND events "fifoevent" and "termcount" plus the
+      rising/falling edges on the GPMC_WAIT pins.
+      The interrupt number mapping is as follows
+      0 - NAND_fifoevent
+      1 - NAND_termcount
+      2 - GPMC_WAIT0 pin edge
+      3 - GPMC_WAIT1 pin edge, and so on.
+
+  '#gpio-cells':
+    const: 2
+
+  gpio-controller:
+    description: |
+      The GPMC driver implements a GPIO controller for the
+      GPMC WAIT pins that can be used as general purpose inputs.
+      0 maps to GPMC_WAIT0 pin.
+
+  ti,hwmods:
+    description:
+      Name of the HWMOD associated with GPMC. This is for legacy
+      omap2/3 platforms only.
+    $ref: /schemas/types.yaml#/definitions/string
+    deprecated: true
+
+  ti,no-idle-on-init:
+    description:
+      Prevent idling the module at init. This is for legacy omap2/3
+      platforms only.
+    type: boolean
+    deprecated: true
+
+patternProperties:
+  "@[0-7],[a-f0-9]+$":
+    type: object
+    description: |
+      The child device node represents the device connected to the GPMC
+      bus. The device can be a NAND chip, SRAM device, NOR device
+      or an ASIC.
+
+    allOf:
+      - $ref: "ti,gpmc-child.yaml"
+
+    unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - gpmc,num-cs
+  - gpmc,num-waitpins
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/gpio/gpio.h>
+
+    gpmc: memory-controller@50000000 {
+      compatible = "ti,am3352-gpmc";
+      reg = <0x50000000 0x2000>;
+      interrupts = <100>;
+      clocks = <&l3s_clkctrl>;
+      clock-names = "fck";
+      dmas = <&edma 52 0>;
+      dma-names = "rxtx";
+      gpmc,num-cs = <8>;
+      gpmc,num-waitpins = <2>;
+      #address-cells = <2>;
+      #size-cells = <1>;
+      ranges = <0 0 0x08000000 0x10000000>; /* CS0 @addr 0x8000000, size 0x10000000 */
+      interrupt-controller;
+      #interrupt-cells = <2>;
+      gpio-controller;
+      #gpio-cells = <2>;
+
+      nand@0,0 {
+        compatible = "ti,omap2-nand";
+        reg = <0 0 4>;
+        interrupt-parent = <&gpmc>;
+        interrupts = <0 IRQ_TYPE_NONE>, /* fifoevent */
+                     <1 IRQ_TYPE_NONE>; /* termcount */
+        ti,nand-xfer-type = "prefetch-dma";
+        ti,nand-ecc-opt = "bch16";
+        ti,elm-id = <&elm>;
+        rb-gpios = <&gpmc 0 GPIO_ACTIVE_HIGH>; /* gpmc_wait0 pin */
+      };
+    };

Documentation/devicetree/bindings/mtd/gpmc-nand.txt

···
-Device tree bindings for GPMC connected NANDs
-
-GPMC connected NAND (found on OMAP boards) are represented as child nodes of
-the GPMC controller with a name of "nand".
-
-All timing relevant properties as well as generic gpmc child properties are
-explained in a separate documents - please refer to
-Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
-
-For NAND specific properties such as ECC modes or bus width, please refer to
-Documentation/devicetree/bindings/mtd/nand-controller.yaml
-
-
-Required properties:
-
- - compatible:	"ti,omap2-nand"
- - reg:		range id (CS number), base offset and length of the
-		NAND I/O space
- - interrupts:	Two interrupt specifiers, one for fifoevent, one for termcount.
-
-Optional properties:
-
- - nand-bus-width: 		Set this numeric value to 16 if the hardware
-				is wired that way. If not specified, a bus
-				width of 8 is assumed.
-
- - ti,nand-ecc-opt:		A string setting the ECC layout to use. One of:
-		"sw"		1-bit Hamming ecc code via software
-		"hw"		<deprecated> use "ham1" instead
-		"hw-romcode"	<deprecated> use "ham1" instead
-		"ham1"		1-bit Hamming ecc code
-		"bch4"		4-bit BCH ecc code
-		"bch8"		8-bit BCH ecc code
-		"bch16"		16-bit BCH ECC code
-		Refer below "How to select correct ECC scheme for your device ?"
-
- - ti,nand-xfer-type:		A string setting the data transfer type. One of:
-
-		"prefetch-polled"	Prefetch polled mode (default)
-		"polled"		Polled mode, without prefetch
-		"prefetch-dma"		Prefetch enabled DMA mode
-		"prefetch-irq"		Prefetch enabled irq mode
-
- - elm_id:	<deprecated> use "ti,elm-id" instead
- - ti,elm-id:	Specifies phandle of the ELM devicetree node.
-		ELM is an on-chip hardware engine on TI SoC which is used for
-		locating ECC errors for BCHx algorithms. SoC devices which have
-		ELM hardware engines should specify this device node in .dtsi
-		Using ELM for ECC error correction frees some CPU cycles.
- - rb-gpios:	GPIO specifier for the ready/busy# pin.
-
-For inline partition table parsing (optional):
-
- - #address-cells: should be set to 1
- - #size-cells: should be set to 1
-
-Example for an AM33xx board:
-
-	gpmc: gpmc@50000000 {
-		compatible = "ti,am3352-gpmc";
-		ti,hwmods = "gpmc";
-		reg = <0x50000000 0x36c>;
-		interrupts = <100>;
-		gpmc,num-cs = <8>;
-		gpmc,num-waitpins = <2>;
-		#address-cells = <2>;
-		#size-cells = <1>;
-		ranges = <0 0 0x08000000 0x1000000>;	/* CS0 space, 16MB */
-		elm_id = <&elm>;
-		interrupt-controller;
-		#interrupt-cells = <2>;
-
-		nand@0,0 {
-			compatible = "ti,omap2-nand";
-			reg = <0 0 4>;		/* CS0, offset 0, NAND I/O window 4 */
-			interrupt-parent = <&gpmc>;
-			interrupts = <0 IRQ_TYPE_NONE>, <1 IRQ_TYPE NONE>;
-			nand-bus-width = <16>;
-			ti,nand-ecc-opt = "bch8";
-			ti,nand-xfer-type = "polled";
-			rb-gpios = <&gpmc 0 GPIO_ACTIVE_HIGH>; /* gpmc_wait0 */
-
-			gpmc,sync-clk-ps = <0>;
-			gpmc,cs-on-ns = <0>;
-			gpmc,cs-rd-off-ns = <44>;
-			gpmc,cs-wr-off-ns = <44>;
-			gpmc,adv-on-ns = <6>;
-			gpmc,adv-rd-off-ns = <34>;
-			gpmc,adv-wr-off-ns = <44>;
-			gpmc,we-off-ns = <40>;
-			gpmc,oe-off-ns = <54>;
-			gpmc,access-ns = <64>;
-			gpmc,rd-cycle-ns = <82>;
-			gpmc,wr-cycle-ns = <82>;
-			gpmc,wr-access-ns = <40>;
-			gpmc,wr-data-mux-bus-ns = <0>;
-
-			#address-cells = <1>;
-			#size-cells = <1>;
-
-			/* partitions go here */
-		};
-	};
-
-How to select correct ECC scheme for your device ?
---------------------------------------------------
-Higher ECC scheme usually means better protection against bit-flips and
-increased system lifetime. However, selection of ECC scheme is dependent
-on various other factors also like;
-
-(1) support of built in hardware engines.
-	Some legacy OMAP SoC do not have ELM harware engine, so those SoC cannot
-	support ecc-schemes with hardware error-correction (BCHx_HW). However
-	such SoC can use ecc-schemes with software library for error-correction
-	(BCHx_HW_DETECTION_SW). The error correction capability with software
-	library remains equivalent to their hardware counter-part, but there is
-	slight CPU penalty when too many bit-flips are detected during reads.
-
-(2) Device parameters like OOBSIZE.
-	Other factor which governs the selection of ecc-scheme is oob-size.
-	Higher ECC schemes require more OOB/Spare area to store ECC syndrome,
-	so the device should have enough free bytes available its OOB/Spare
-	area to accommodate ECC for entire page. In general following expression
-	helps in determining if given device can accommodate ECC syndrome:
-	"2 + (PAGESIZE / 512) * ECC_BYTES" <= OOBSIZE"
-	where
-		OOBSIZE		number of bytes in OOB/spare area
-		PAGESIZE	number of bytes in main-area of device page
-		ECC_BYTES	number of ECC bytes generated to protect
-		                512 bytes of data, which is:
-				'3' for HAM1_xx ecc schemes
-				'7' for BCH4_xx ecc schemes
-				'14' for BCH8_xx ecc schemes
-				'26' for BCH16_xx ecc schemes
-
-	Example(a): For a device with PAGESIZE = 2048 and OOBSIZE = 64 and
-		trying to use BCH16 (ECC_BYTES=26) ecc-scheme.
-		Number of ECC bytes per page = (2 + (2048 / 512) * 26) = 106 B
-		which is greater than capacity of NAND device (OOBSIZE=64)
-		Hence, BCH16 cannot be supported on given device. But it can
-		probably use lower ecc-schemes like BCH8.
-
-	Example(b): For a device with PAGESIZE = 2048 and OOBSIZE = 128 and
-		trying to use BCH16 (ECC_BYTES=26) ecc-scheme.
-		Number of ECC bytes per page = (2 + (2048 / 512) * 26) = 106 B
-		which can be accommodated in the OOB/Spare area of this device
-		(OOBSIZE=128). So this device can use BCH16 ecc-scheme.

Documentation/devicetree/bindings/mtd/gpmc-nor.txt

···
-Device tree bindings for NOR flash connect to TI GPMC
-
-NOR flash connected to the TI GPMC (found on OMAP boards) are represented as
-child nodes of the GPMC controller with a name of "nor".
-
-All timing relevant properties as well as generic GPMC child properties are
-explained in a separate documents. Please refer to
-Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
-
-Required properties:
-- bank-width: 		Width of NOR flash in bytes. GPMC supports 8-bit and
-			16-bit devices and so must be either 1 or 2 bytes.
-- compatible:		Documentation/devicetree/bindings/mtd/mtd-physmap.yaml
-- gpmc,cs-on-ns:		Chip-select assertion time
-- gpmc,cs-rd-off-ns:	Chip-select de-assertion time for reads
-- gpmc,cs-wr-off-ns:	Chip-select de-assertion time for writes
-- gpmc,oe-on-ns:	Output-enable assertion time
-- gpmc,oe-off-ns:	Output-enable de-assertion time
-- gpmc,we-on-ns		Write-enable assertion time
-- gpmc,we-off-ns:	Write-enable de-assertion time
-- gpmc,access-ns:	Start cycle to first data capture (read access)
-- gpmc,rd-cycle-ns:	Total read cycle time
-- gpmc,wr-cycle-ns:	Total write cycle time
-- linux,mtd-name:	Documentation/devicetree/bindings/mtd/mtd-physmap.yaml
-- reg:			Chip-select, base address (relative to chip-select)
-			and size of NOR flash. Note that base address will be
-			typically 0 as this is the start of the chip-select.
-
-Optional properties:
-- gpmc,XXX		Additional GPMC timings and settings parameters. See
-			Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
-
-Optional properties for partition table parsing:
-- #address-cells: should be set to 1
-- #size-cells: should be set to 1
-
-Example:
-
-gpmc: gpmc@6e000000 {
-	compatible = "ti,omap3430-gpmc", "simple-bus";
-	ti,hwmods = "gpmc";
-	reg = <0x6e000000 0x1000>;
-	interrupts = <20>;
-	gpmc,num-cs = <8>;
-	gpmc,num-waitpins = <4>;
-	#address-cells = <2>;
-	#size-cells = <1>;
-
-	ranges = <0 0 0x10000000 0x08000000>;
-
-	nor@0,0 {
-		compatible = "cfi-flash";
-		linux,mtd-name= "intel,pf48f6000m0y1be";
-		#address-cells = <1>;
-		#size-cells = <1>;
-		reg = <0 0 0x08000000>;
-		bank-width = <2>;
-
-		gpmc,mux-add-data;
-		gpmc,cs-on-ns = <0>;
-		gpmc,cs-rd-off-ns = <186>;
-		gpmc,cs-wr-off-ns = <186>;
-		gpmc,adv-on-ns = <12>;
-		gpmc,adv-rd-off-ns = <48>;
-		gpmc,adv-wr-off-ns = <48>;
-		gpmc,oe-on-ns = <54>;
-		gpmc,oe-off-ns = <168>;
-		gpmc,we-on-ns = <54>;
-		gpmc,we-off-ns = <168>;
-		gpmc,rd-cycle-ns = <186>;
-		gpmc,wr-cycle-ns = <186>;
-		gpmc,access-ns = <114>;
-		gpmc,page-burst-access-ns = <6>;
-		gpmc,bus-turnaround-ns = <12>;
-		gpmc,cycle2cycle-delay-ns = <18>;
-		gpmc,wr-data-mux-bus-ns = <90>;
-		gpmc,wr-access-ns = <186>;
-		gpmc,cycle2cycle-samecsen;
-		gpmc,cycle2cycle-diffcsen;
-
-		partition@0 {
-			label = "bootloader-nor";
-			reg = <0 0x40000>;
-		};
-		partition@40000 {
-			label = "params-nor";
-			reg = <0x40000 0x40000>;
-		};
-		partition@80000 {
-			label = "kernel-nor";
-			reg = <0x80000 0x200000>;
-		};
-		partition@280000 {
-			label = "filesystem-nor";
-			reg = <0x240000 0x7d80000>;
-		};
-	};
-};

Documentation/devicetree/bindings/mtd/gpmc-onenand.txt

···
-Device tree bindings for GPMC connected OneNANDs
-
-GPMC connected OneNAND (found on OMAP boards) are represented as child nodes of
-the GPMC controller with a name of "onenand".
-
-All timing relevant properties as well as generic gpmc child properties are
-explained in a separate documents - please refer to
-Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
-
-Required properties:
-
- - compatible:		"ti,omap2-onenand"
- - reg:			The CS line the peripheral is connected to
- - gpmc,device-width:	Width of the ONENAND device connected to the GPMC
-			in bytes. Must be 1 or 2.
-
-Optional properties:
-
- - int-gpios:		GPIO specifier for the INT pin.
-
-For inline partition table parsing (optional):
-
- - #address-cells: should be set to 1
- - #size-cells: should be set to 1
-
-Example for an OMAP3430 board:
-
-	gpmc: gpmc@6e000000 {
-		compatible = "ti,omap3430-gpmc";
-		ti,hwmods = "gpmc";
-		reg = <0x6e000000 0x1000000>;
-		interrupts = <20>;
-		gpmc,num-cs = <8>;
-		gpmc,num-waitpins = <4>;
-		#address-cells = <2>;
-		#size-cells = <1>;
-
-		onenand@0 {
-			compatible = "ti,omap2-onenand";
-			reg = <0 0 0>; /* CS0, offset 0 */
-			gpmc,device-width = <2>;
-
-			#address-cells = <1>;
-			#size-cells = <1>;
-
-			/* partitions go here */
-		};
-	};

Documentation/devicetree/bindings/mtd/ti,gpmc-nand.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/ti,gpmc-nand.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments GPMC NAND Flash controller.
+
+maintainers:
+  - Tony Lindgren <[e-mail]>
+  - Roger Quadros <[e-mail]>
+
+description:
+  GPMC NAND controller/Flash is represented as a child of the
+  GPMC controller node.
+
+properties:
+  compatible:
+    const: ti,omap2-nand
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    items:
+      - description: Interrupt for fifoevent
+      - description: Interrupt for termcount
+
+  "#address-cells": true
+
+  "#size-cells": true
+
+  ti,nand-ecc-opt:
+    description: Desired ECC algorithm
+    $ref: /schemas/types.yaml#/definitions/string
+    enum: [sw, ham1, bch4, bch8, bch16]
+
+  ti,nand-xfer-type:
+    description: Data transfer method between controller and chip.
+    $ref: /schemas/types.yaml#/definitions/string
+    enum: [prefetch-polled, polled, prefetch-dma, prefetch-irq]
+    default: prefetch-polled
+
+  ti,elm-id:
+    description:
+      phandle to the ELM (Error Location Module).
+    $ref: /schemas/types.yaml#/definitions/phandle
+
+  nand-bus-width:
+    description:
+      Bus width to the NAND chip
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [8, 16]
+    default: 8
+
+patternProperties:
+  "@[0-9a-f]+$":
+    $ref: "/schemas/mtd/partitions/partition.yaml"
+
+allOf:
+  - $ref: "/schemas/memory-controllers/ti,gpmc-child.yaml"
+
+required:
+  - compatible
+  - reg
+  - ti,nand-ecc-opt
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/gpio/gpio.h>
+
+    gpmc: memory-controller@50000000 {
+      compatible = "ti,am3352-gpmc";
+      dmas = <&edma 52 0>;
+      dma-names = "rxtx";
+      clocks = <&l3s_gclk>;
+      clock-names = "fck";
+      reg = <0x50000000 0x2000>;
+      interrupts = <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>;
+      gpmc,num-cs = <7>;
+      gpmc,num-waitpins = <2>;
+      #address-cells = <2>;
+      #size-cells = <1>;
+      interrupt-controller;
+      #interrupt-cells = <2>;
+      gpio-controller;
+      #gpio-cells = <2>;
+
+      ranges = <0 0 0x08000000 0x01000000>;   /* CS0 space. Min partition = 16MB */
+      nand@0,0 {
+        compatible = "ti,omap2-nand";
+        reg = <0 0 4>;          /* device IO registers */
+        interrupt-parent = <&gpmc>;
+        interrupts = <0 IRQ_TYPE_NONE>, /* fifoevent */
+                     <1 IRQ_TYPE_NONE>; /* termcount */
+        ti,nand-xfer-type = "prefetch-dma";
+        ti,nand-ecc-opt = "bch16";
+        ti,elm-id = <&elm>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        /* NAND generic properties */
+        nand-bus-width = <8>;
+        rb-gpios = <&gpmc 0 GPIO_ACTIVE_HIGH>;  /* gpmc_wait0 */
+
+        /* GPMC properties*/
+        gpmc,device-width = <1>;
+
+        partition@0 {
+          label = "NAND.SPL";
+          reg = <0x00000000 0x00040000>;
+        };
+        partition@1 {
+          label = "NAND.SPL.backup1";
+          reg = <0x00040000 0x00040000>;
+        };
+      };
+    };

Documentation/devicetree/bindings/mtd/ti,gpmc-onenand.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/ti,gpmc-onenand.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: OneNAND over Texas Instruments GPMC bus.
+
+maintainers:
+  - Tony Lindgren <[e-mail]>
+  - Roger Quadros <[e-mail]>
+
+description:
+  GPMC connected OneNAND (found on OMAP boards) are represented
+  as child nodes of the GPMC controller.
+
+properties:
+  compatible:
+    const: ti,omap2-onenand
+
+  reg:
+    items:
+      - description: |
+          Chip Select number, register offset and size of
+          OneNAND register window.
+
+  "#address-cells": true
+
+  "#size-cells": true
+
+  int-gpios:
+    description: GPIO specifier for the INT pin.
+
+patternProperties:
+  "@[0-9a-f]+$":
+    $ref: "/schemas/mtd/partitions/partition.yaml"
+
+allOf:
+  - $ref: "/schemas/memory-controllers/ti,gpmc-child.yaml"
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    gpmc: memory-controller@6e000000 {
+      compatible = "ti,omap3430-gpmc";
+      reg = <0x6e000000 0x02d0>;
+      interrupts = <20>;
+      gpmc,num-cs = <8>;
+      gpmc,num-waitpins = <4>;
+      clocks = <&l3s_clkctrl>;
+      clock-names = "fck";
+      #address-cells = <2>;
+      #size-cells = <1>;
+
+      ranges = <0 0 0x01000000 0x01000000>,   /* 16 MB for OneNAND */
+               <1 0 0x02000000 0x01000000>;   /* 16 MB for smc91c96 */
+
+      onenand@0,0 {
+        compatible = "ti,omap2-onenand";
+        reg = <0 0 0x20000>;    /* CS0, offset 0, IO size 128K */
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        partition@0 {
+          label = "bootloader";
+          reg = <0x00000000 0x00100000>;
+        };
+
+        partition@100000 {
+          label = "config";
+          reg = <0x00100000 0x002c0000>;
+        };
+      };
+    };

Documentation/devicetree/bindings/net/gpmc-eth.txt

···
-Device tree bindings for Ethernet chip connected to TI GPMC
-
-Besides being used to interface with external memory devices, the
-General-Purpose Memory Controller can be used to connect Pseudo-SRAM devices
-such as ethernet controllers to processors using the TI GPMC as a data bus.
-
-Ethernet controllers connected to TI GPMC are represented as child nodes of
-the GPMC controller with an "ethernet" name.
-
-All timing relevant properties as well as generic GPMC child properties are
-explained in a separate documents. Please refer to
-Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
-
-For the properties relevant to the ethernet controller connected to the GPMC
-refer to the binding documentation of the device. For example, the documentation
-for the SMSC 911x is Documentation/devicetree/bindings/net/smsc,lan9115.yaml
-
-Child nodes need to specify the GPMC bus address width using the "bank-width"
-property but is possible that an ethernet controller also has a property to
-specify the I/O registers address width. Even when the GPMC has a maximum 16-bit
-address width, it supports devices with 32-bit word registers.
-For example with an SMSC LAN911x/912x controller connected to the TI GPMC on an
-OMAP2+ board, "bank-width = <2>;" and "reg-io-width = <4>;".
-
-Required properties:
-- bank-width: 		Address width of the device in bytes. GPMC supports 8-bit
-			and 16-bit devices and so must be either 1 or 2 bytes.
-- compatible:		Compatible string property for the ethernet child device.
-- gpmc,cs-on-ns:	Chip-select assertion time
-- gpmc,cs-rd-off-ns:	Chip-select de-assertion time for reads
-- gpmc,cs-wr-off-ns:	Chip-select de-assertion time for writes
-- gpmc,oe-on-ns:	Output-enable assertion time
-- gpmc,oe-off-ns:	Output-enable de-assertion time
-- gpmc,we-on-ns:	Write-enable assertion time
-- gpmc,we-off-ns:	Write-enable de-assertion time
-- gpmc,access-ns:	Start cycle to first data capture (read access)
-- gpmc,rd-cycle-ns:	Total read cycle time
-- gpmc,wr-cycle-ns:	Total write cycle time
-- reg:			Chip-select, base address (relative to chip-select)
-			and size of the memory mapped for the device.
-			Note that base address will be typically 0 as this
-			is the start of the chip-select.
-
-Optional properties:
-- gpmc,XXX		Additional GPMC timings and settings parameters. See
-			Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt
-
-Example:
-
-gpmc: gpmc@6e000000 {
-	compatible = "ti,omap3430-gpmc";
-	ti,hwmods = "gpmc";
-	reg = <0x6e000000 0x1000>;
-	interrupts = <20>;
-	gpmc,num-cs = <8>;
-	gpmc,num-waitpins = <4>;
-	#address-cells = <2>;
-	#size-cells = <1>;
-
-	ranges = <5 0 0x2c000000 0x1000000>;
-
-	ethernet@5,0 {
-		compatible = "smsc,lan9221", "smsc,lan9115";
-		reg = <5 0 0xff>;
-		bank-width = <2>;
-
-		gpmc,mux-add-data;
-		gpmc,cs-on-ns = <0>;
-		gpmc,cs-rd-off-ns = <186>;
-		gpmc,cs-wr-off-ns = <186>;
-		gpmc,adv-on-ns = <12>;
-		gpmc,adv-rd-off-ns = <48>;
-		gpmc,adv-wr-off-ns = <48>;
-		gpmc,oe-on-ns = <54>;
-		gpmc,oe-off-ns = <168>;
-		gpmc,we-on-ns = <54>;
-		gpmc,we-off-ns = <168>;
-		gpmc,rd-cycle-ns = <186>;
-		gpmc,wr-cycle-ns = <186>;
-		gpmc,access-ns = <114>;
-		gpmc,page-burst-access-ns = <6>;
-		gpmc,bus-turnaround-ns = <12>;
-		gpmc,cycle2cycle-delay-ns = <18>;
-		gpmc,wr-data-mux-bus-ns = <90>;
-		gpmc,wr-access-ns = <186>;
-		gpmc,cycle2cycle-samecsen;
-		gpmc,cycle2cycle-diffcsen;
-
-		interrupt-parent = <&gpio6>;
-		interrupts = <16>;
-		vmmc-supply = <&vddvario>;
-		vmmc_aux-supply = <&vdd33a>;
-		reg-io-width = <4>;
-
-		smsc,save-mac-address;
-	};
-};

arch/arm/boot/dts/omap-gpmc-smsc911x.dtsi

···
 		compatible = "smsc,lan9221", "smsc,lan9115";
 		bank-width = <2>;
 		gpmc,device-width = <1>;
-		gpmc,cycle2cycle-samecsen = <1>;
-		gpmc,cycle2cycle-diffcsen = <1>;
+		gpmc,cycle2cycle-samecsen;
+		gpmc,cycle2cycle-diffcsen;
 		gpmc,cs-on-ns = <5>;
 		gpmc,cs-rd-off-ns = <150>;
 		gpmc,cs-wr-off-ns = <150>;

arch/arm/boot/dts/omap-gpmc-smsc9221.dtsi

···
 		compatible = "smsc,lan9221","smsc,lan9115";
 		bank-width = <2>;
 
-		gpmc,mux-add-data;
+		gpmc,mux-add-data = <0>;
 		gpmc,cs-on-ns = <0>;
 		gpmc,cs-rd-off-ns = <42>;
 		gpmc,cs-wr-off-ns = <36>;

arch/arm/boot/dts/omap-zoom-common.dtsi

···
 		gpmc,mux-add-data = <0>;
 		gpmc,device-width = <1>;
 		gpmc,wait-pin = <1>;
-		gpmc,cycle2cycle-samecsen = <1>;
-		gpmc,cycle2cycle-diffcsen = <1>;
+		gpmc,cycle2cycle-samecsen;
+		gpmc,cycle2cycle-diffcsen;
 		gpmc,cs-on-ns = <5>;
 		gpmc,cs-rd-off-ns = <155>;
 		gpmc,cs-wr-off-ns = <155>;

arch/arm/boot/dts/omap2430-sdp.dts

···
 		gpmc,sync-clk-ps = <0>;
 		gpmc,mux-add-data = <2>;
 		gpmc,device-width = <1>;
-		gpmc,cycle2cycle-samecsen = <1>;
-		gpmc,cycle2cycle-diffcsen = <1>;
+		gpmc,cycle2cycle-samecsen;
+		gpmc,cycle2cycle-diffcsen;
 		gpmc,cs-on-ns = <6>;
 		gpmc,cs-rd-off-ns = <187>;
 		gpmc,cs-wr-off-ns = <187>;

arch/arm/boot/dts/omap3-devkit8000-common.dtsi

···
 		gpmc,mux-add-data = <0>;
 		gpmc,device-width = <1>;
 		gpmc,wait-pin = <0>;
-		gpmc,cycle2cycle-samecsen = <1>;
-		gpmc,cycle2cycle-diffcsen = <1>;
+		gpmc,cycle2cycle-samecsen;
+		gpmc,cycle2cycle-diffcsen;
 
 		gpmc,cs-on-ns = <6>;
 		gpmc,cs-rd-off-ns = <180>;

arch/arm/boot/dts/omap3-overo-tobiduo-common.dtsi

···
 		compatible = "smsc,lan9221","smsc,lan9115";
 		bank-width = <2>;
 
-		gpmc,mux-add-data;
+		gpmc,mux-add-data = <0>;
 		gpmc,cs-on-ns = <0>;
 		gpmc,cs-rd-off-ns = <42>;
 		gpmc,cs-wr-off-ns = <36>;

arch/arm/boot/dts/omap3-sb-t35.dtsi

···
 		reg = <4 0 0xff>;
 		bank-width = <2>;
 		gpmc,device-width = <1>;
-		gpmc,cycle2cycle-samecsen = <1>;
-		gpmc,cycle2cycle-diffcsen = <1>;
+		gpmc,cycle2cycle-samecsen;
+		gpmc,cycle2cycle-diffcsen;
 		gpmc,cs-on-ns = <5>;
 		gpmc,cs-rd-off-ns = <150>;
 		gpmc,cs-wr-off-ns = <150>;