diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/README.at91 | 2 | ||||
| -rw-r--r-- | doc/README.watchdog | 2 | ||||
| -rw-r--r-- | doc/device-tree-bindings/ram/k3-am654-ddrss.txt | 46 | ||||
| -rw-r--r-- | doc/device-tree-bindings/w1-eeprom/ds2502.txt | 33 |
4 files changed, 81 insertions, 2 deletions
diff --git a/doc/README.at91 b/doc/README.at91 index 67412136ee..39dd5632ba 100644 --- a/doc/README.at91 +++ b/doc/README.at91 @@ -171,4 +171,4 @@ III. Watchdog support your code (make sure not to disable it in AT91Bootstrap for instance). In the U-Boot configuration, the AT91 watchdog support is enabled using - the CONFIG_AT91SAM9_WATCHDOG and CONFIG_HW_WATCHDOG options. + the CONFIG_WDT and CONFIG_WDT_AT91 options. diff --git a/doc/README.watchdog b/doc/README.watchdog index 7097c8766b..f23c923910 100644 --- a/doc/README.watchdog +++ b/doc/README.watchdog @@ -14,7 +14,7 @@ CONFIG_WATCHDOG_TIMEOUT_MSECS If not given, will default to maximum timeout. This would be 128000 msec for i.mx31/35/5x/6x. -CONFIG_AT91SAM9_WATCHDOG +CONFIG_WDT_AT91 Available for AT91SAM9 to service the watchdog. CONFIG_FTWDT010_WATCHDOG diff --git a/doc/device-tree-bindings/ram/k3-am654-ddrss.txt b/doc/device-tree-bindings/ram/k3-am654-ddrss.txt new file mode 100644 index 0000000000..4ed731c524 --- /dev/null +++ b/doc/device-tree-bindings/ram/k3-am654-ddrss.txt @@ -0,0 +1,46 @@ +Texas Instruments' K3 AM654 DDRSS +================================= + +K3 based AM654 devices has DDR memory subsystem that comprises +Synopys DDR controller, Synopsis DDR phy and wrapper logic to +integrate these blocks into the device. This DDR subsystem +provides an interface to external SDRAM devices. This DDRSS driver +adds support for the initialization of the external SDRAM devices by +configuring the DDRSS registers and using the buitin PHY +initialization routines. + +DDRSS device node: +================== +Required properties: +-------------------- +- compatible: Shall be: "ti,am654-ddrss" +- reg-names ss - Map the sub system wrapper logic region + ctl - Map the controller region + phy - Map the PHY region +- reg: Contains the register map per reg-names. +- power-domains: Should contain a phandle to a PM domain provider node + and an args specifier containing the DDRSS device id + value. This property is as per the binding, + doc/device-tree-bindings/power/ti,sci-pm-domain.txt +- clocks: Must contain an entry for enabling DDR clock. Should + be defined as per the appropriate clock bindings consumer + usage in doc/device-tree-bindings/clock/ti,sci-clk.txt + + +Optional Properties: +-------------------- +- clock-frequency: Frequency at which DDR pll should be locked. + If not provided, default frequency will be used. + +Example (AM65x): +================ + memory-controller: memory-controller@298e000 { + compatible = "ti,am654-ddrss"; + reg = <0x0298e000 0x200>, + <0x02980000 0x4000>, + <0x02988000 0x2000>; + reg-names = "ss", "ctl", "phy"; + clocks = <&k3_clks 20 0>; + power-domains = <&k3_pds 20>; + u-boot,dm-spl; + }; diff --git a/doc/device-tree-bindings/w1-eeprom/ds2502.txt b/doc/device-tree-bindings/w1-eeprom/ds2502.txt new file mode 100644 index 0000000000..7f05fc432e --- /dev/null +++ b/doc/device-tree-bindings/w1-eeprom/ds2502.txt @@ -0,0 +1,33 @@ +Maxim DS2502 driver device binding - one wire protocol add only memory from Maxim +======================= + +This memory needs to be connected to a onewire bus, as a child node. +The bus will read the device serial number and match this node with a found +device on the bus +Also check doc/device-tree-bindings/w1 for onewire bus drivers + +Driver: +- drivers/w1-eeprom/ds2502.c + +Ds2502 device-tree node properties: +Required: +* compatible = "maxim,ds2502" + +Optional: +* none + +Example: + eeprom1: eeprom@0 { + compatible = "maxim,ds2502"; + }; + +Example with parent bus: + onewire { + compatible = "fsl,imx53-owire"; + reg = <0x63fa4000 0x4000>; + + eeprom1: eeprom@0 { + compatible = "maxim,ds2502"; + }; + }; + |