diff options
Diffstat (limited to 'Documentation/devicetree/bindings/bus/imx-weim.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/bus/imx-weim.txt | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/Documentation/devicetree/bindings/bus/imx-weim.txt b/Documentation/devicetree/bindings/bus/imx-weim.txt deleted file mode 100644 index 1b1d1c5c21ea..000000000000 --- a/Documentation/devicetree/bindings/bus/imx-weim.txt +++ /dev/null @@ -1,112 +0,0 @@ -Device tree bindings for i.MX Wireless External Interface Module (WEIM) - -The term "wireless" does not imply that the WEIM is literally an interface -without wires. It simply means that this module was originally designed for -wireless and mobile applications that use low-power technology. - -The actual devices are instantiated from the child nodes of a WEIM node. - -Required properties: - - - compatible: Should contain one of the following: - "fsl,imx1-weim" - "fsl,imx27-weim" - "fsl,imx51-weim" - "fsl,imx50-weim" - "fsl,imx6q-weim" - - reg: A resource specifier for the register space - (see the example below) - - clocks: the clock, see the example below. - - #address-cells: Must be set to 2 to allow memory address translation - - #size-cells: Must be set to 1 to allow CS address passing - - 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> - -Optional properties: - - - fsl,weim-cs-gpr: For "fsl,imx50-weim" and "fsl,imx6q-weim" type of - devices, it should be the phandle to the system General - Purpose Register controller that contains WEIM CS GPR - register, e.g. IOMUXC_GPR1 on i.MX6Q. IOMUXC_GPR1[11:0] - should be set up as one of the following 4 possible - values depending on the CS space configuration. - - IOMUXC_GPR1[11:0] CS0 CS1 CS2 CS3 - --------------------------------------------- - 05 128M 0M 0M 0M - 033 64M 64M 0M 0M - 0113 64M 32M 32M 0M - 01111 32M 32M 32M 32M - - In case that the property is absent, the reset value or - what bootloader sets up in IOMUXC_GPR1[11:0] will be - used. - - - fsl,burst-clk-enable For "fsl,imx50-weim" and "fsl,imx6q-weim" type of - devices, the presence of this property indicates that - the weim bus should operate in Burst Clock Mode. - -Timing property for child nodes. It is mandatory, not optional. - - - fsl,weim-cs-timing: The timing array, contains timing values for the - child node. We get the CS indexes from the address - ranges in the child node's "reg" property. - The number of registers depends on the selected chip: - For i.MX1, i.MX21 ("fsl,imx1-weim") there are two - registers: CSxU, CSxL. - For i.MX25, i.MX27, i.MX31 and i.MX35 ("fsl,imx27-weim") - there are three registers: CSCRxU, CSCRxL, CSCRxA. - For i.MX50, i.MX53 ("fsl,imx50-weim"), - i.MX51 ("fsl,imx51-weim") and i.MX6Q ("fsl,imx6q-weim") - there are six registers: CSxGCR1, CSxGCR2, CSxRCR1, - CSxRCR2, CSxWCR1, CSxWCR2. - -Example for an imx6q-sabreauto board, the NOR flash connected to the WEIM: - - weim: weim@21b8000 { - compatible = "fsl,imx6q-weim"; - reg = <0x021b8000 0x4000>; - clocks = <&clks 196>; - #address-cells = <2>; - #size-cells = <1>; - ranges = <0 0 0x08000000 0x08000000>; - fsl,weim-cs-gpr = <&gpr>; - - nor@0,0 { - compatible = "cfi-flash"; - reg = <0 0 0x02000000>; - #address-cells = <1>; - #size-cells = <1>; - bank-width = <2>; - fsl,weim-cs-timing = <0x00620081 0x00000001 0x1c022000 - 0x0000c000 0x1404a38e 0x00000000>; - }; - }; - -Example for an imx6q-based board, a multi-chipselect device connected to WEIM: - -In this case, both chip select 0 and 1 will be configured with the same timing -array values. - - weim: weim@21b8000 { - compatible = "fsl,imx6q-weim"; - reg = <0x021b8000 0x4000>; - clocks = <&clks 196>; - #address-cells = <2>; - #size-cells = <1>; - ranges = <0 0 0x08000000 0x02000000 - 1 0 0x0a000000 0x02000000 - 2 0 0x0c000000 0x02000000 - 3 0 0x0e000000 0x02000000>; - fsl,weim-cs-gpr = <&gpr>; - - acme@0 { - compatible = "acme,whatever"; - reg = <0 0 0x100>, <0 0x400000 0x800>, - <1 0x400000 0x800>; - fsl,weim-cs-timing = <0x024400b1 0x00001010 0x20081100 - 0x00000000 0xa0000240 0x00000000>; - }; - }; |