The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/memory-controllers/ti,gpmc-child.yaml

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10  
    1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/memory-controllers/ti,gpmc-child.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: device tree bindings for children of the Texas Instruments GPMC
    8 
    9 maintainers:
   10   - Tony Lindgren <tony@atomide.com>
   11   - Roger Quadros <rogerq@kernel.org>
   12 
   13 description:
   14   This binding is meant for the child nodes of the GPMC node. The node
   15   represents any device connected to the GPMC bus. It may be a Flash chip,
   16   RAM chip or Ethernet controller, etc. These properties are meant for
   17   configuring the GPMC settings/timings and will accompany the bindings
   18   supported by the respective device.
   19 
   20 properties:
   21   reg: true
   22 
   23 # GPMC Timing properties for child nodes. All are optional and default to 0.
   24   gpmc,sync-clk-ps:
   25     description: Minimum clock period for synchronous mode
   26     default: 0
   27 
   28 # Chip-select signal timings corresponding to GPMC_CONFIG2:
   29   gpmc,cs-on-ns:
   30     description: Assertion time
   31     default: 0
   32 
   33   gpmc,cs-rd-off-ns:
   34     description: Read deassertion time
   35     default: 0
   36 
   37   gpmc,cs-wr-off-ns:
   38     description: Write deassertion time
   39     default: 0
   40 
   41 # ADV signal timings corresponding to GPMC_CONFIG3:
   42   gpmc,adv-on-ns:
   43     description: Assertion time
   44     default: 0
   45 
   46   gpmc,adv-rd-off-ns:
   47     description: Read deassertion time
   48     default: 0
   49 
   50   gpmc,adv-wr-off-ns:
   51     description: Write deassertion time
   52     default: 0
   53 
   54   gpmc,adv-aad-mux-on-ns:
   55     description: Assertion time for AAD
   56     default: 0
   57 
   58   gpmc,adv-aad-mux-rd-off-ns:
   59     description: Read deassertion time for AAD
   60     default: 0
   61 
   62   gpmc,adv-aad-mux-wr-off-ns:
   63     description: Write deassertion time for AAD
   64     default: 0
   65 
   66 # WE signals timings corresponding to GPMC_CONFIG4:
   67   gpmc,we-on-ns:
   68     description: Assertion time
   69     default: 0
   70 
   71   gpmc,we-off-ns:
   72     description: Deassertion time
   73     default: 0
   74 
   75 # OE signals timings corresponding to GPMC_CONFIG4:
   76   gpmc,oe-on-ns:
   77     description: Assertion time
   78     default: 0
   79 
   80   gpmc,oe-off-ns:
   81     description: Deassertion time
   82     default: 0
   83 
   84   gpmc,oe-aad-mux-on-ns:
   85     description: Assertion time for AAD
   86     default: 0
   87 
   88   gpmc,oe-aad-mux-off-ns:
   89     description: Deassertion time for AAD
   90     default: 0
   91 
   92 # Access time and cycle time timings (in nanoseconds) corresponding to
   93 # GPMC_CONFIG5:
   94   gpmc,page-burst-access-ns:
   95     description: Multiple access word delay
   96     default: 0
   97 
   98   gpmc,access-ns:
   99     description: Start-cycle to first data valid delay
  100     default: 0
  101 
  102   gpmc,rd-cycle-ns:
  103     description: Total read cycle time
  104     default: 0
  105 
  106   gpmc,wr-cycle-ns:
  107     description: Total write cycle time
  108     default: 0
  109 
  110   gpmc,bus-turnaround-ns:
  111     description: Turn-around time between successive accesses
  112     default: 0
  113 
  114   gpmc,cycle2cycle-delay-ns:
  115     description: Delay between chip-select pulses
  116     default: 0
  117 
  118   gpmc,clk-activation-ns:
  119     description: GPMC clock activation time
  120     default: 0
  121 
  122   gpmc,wait-monitoring-ns:
  123     description: Start of wait monitoring with regard to valid data
  124     default: 0
  125 
  126 # Boolean timing parameters. If property is present, parameter is enabled
  127 # otherwise disabled.
  128   gpmc,adv-extra-delay:
  129     description: ADV signal is delayed by half GPMC clock
  130     type: boolean
  131 
  132   gpmc,cs-extra-delay:
  133     description: CS signal is delayed by half GPMC clock
  134     type: boolean
  135 
  136   gpmc,cycle2cycle-diffcsen:
  137     description: |
  138       Add "cycle2cycle-delay" between successive accesses
  139       to a different CS
  140     type: boolean
  141 
  142   gpmc,cycle2cycle-samecsen:
  143     description: |
  144       Add "cycle2cycle-delay" between successive accesses
  145       to the same CS
  146     type: boolean
  147 
  148   gpmc,oe-extra-delay:
  149     description: OE signal is delayed by half GPMC clock
  150     type: boolean
  151 
  152   gpmc,we-extra-delay:
  153     description: WE signal is delayed by half GPMC clock
  154     type: boolean
  155 
  156   gpmc,time-para-granularity:
  157     description: Multiply all access times by 2
  158     type: boolean
  159 
  160 # The following two properties are applicable only to OMAP3+ and AM335x:
  161   gpmc,wr-access-ns:
  162     description: |
  163       In synchronous write mode, for single or
  164       burst accesses, defines the number of
  165       GPMC_FCLK cycles from start access time
  166       to the GPMC_CLK rising edge used by the
  167       memory device for the first data capture.
  168     default: 0
  169 
  170   gpmc,wr-data-mux-bus-ns:
  171     description: |
  172       In address-data multiplex mode, specifies
  173       the time when the first data is driven on
  174       the address-data bus.
  175     default: 0
  176 
  177 # GPMC chip-select settings properties for child nodes. All are optional.
  178   gpmc,burst-length:
  179     description: Page/burst length.
  180     $ref: /schemas/types.yaml#/definitions/uint32
  181     enum: [0, 4, 8, 16]
  182     default: 0
  183 
  184   gpmc,burst-wrap:
  185     description: Enables wrap bursting
  186     type: boolean
  187 
  188   gpmc,burst-read:
  189     description: Enables read page/burst mode
  190     type: boolean
  191 
  192   gpmc,burst-write:
  193     description: Enables write page/burst mode
  194     type: boolean
  195 
  196   gpmc,device-width:
  197     description: |
  198       Total width of device(s) connected to a GPMC
  199       chip-select in bytes. The GPMC supports 8-bit
  200       and 16-bit devices and so this property must be
  201       1 or 2.
  202     $ref: /schemas/types.yaml#/definitions/uint32
  203     enum: [1, 2]
  204     default: 1
  205 
  206   gpmc,mux-add-data:
  207     description: |
  208       Address and data multiplexing configuration.
  209       Valid values are
  210       0 for Non multiplexed mode
  211       1 for address-address-data multiplexing mode and
  212       2 for address-data multiplexing mode.
  213     $ref: /schemas/types.yaml#/definitions/uint32
  214     enum: [0, 1, 2]
  215 
  216   gpmc,sync-read:
  217     description: |
  218       Enables synchronous read. Defaults to asynchronous
  219       is this is not set.
  220     type: boolean
  221 
  222   gpmc,sync-write:
  223     description: |
  224       Enables synchronous writes. Defaults to asynchronous
  225       is this is not set.
  226     type: boolean
  227 
  228   gpmc,wait-pin:
  229     description: |
  230       Wait-pin used by client. Must be less than "gpmc,num-waitpins".
  231     $ref: /schemas/types.yaml#/definitions/uint32
  232 
  233   gpmc,wait-on-read:
  234     description: Enables wait monitoring on reads.
  235     type: boolean
  236 
  237   gpmc,wait-on-write:
  238     description: Enables wait monitoring on writes.
  239     type: boolean
  240 
  241 required:
  242   - reg
  243 
  244 # the GPMC child will have its own native properties
  245 additionalProperties: true

Cache object: 6a1eb3328f5b0c8a468f8c39f060e3a5

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.