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| author | Rasmus Villemoes <rasmus.villemoes@prevas.dk> | 2019-05-13 13:14:58 +0200 |
|---|---|---|
| committer | Li Yang <leoyang.li@nxp.com> | 2019-06-05 21:26:29 +0200 |
| commit | 8f762fe5819f8561343cf02e234789744ed68a98 (patch) | |
| tree | a2ea3b6335814937ed067ad5942587c0ced198fb /Documentation/devicetree/bindings/soc | |
| parent | soc: fsl: qe: introduce qe_get_device_node helper (diff) | |
| download | linux-8f762fe5819f8561343cf02e234789744ed68a98.tar.xz linux-8f762fe5819f8561343cf02e234789744ed68a98.zip | |
dt-bindings: soc: fsl: qe: document new fsl,qe-snums binding
Reading table 4-30, and its footnotes, of the QUICC Engine Block
Reference Manual shows that the set of snum _values_ is not
necessarily just a function of the _number_ of snums, as given in the
fsl,qe-num-snums property.
As an alternative, to make it easier to add support for other variants
of the QUICC engine IP, this introduces a new binding fsl,qe-snums,
which automatically encodes both the number of snums and the actual
values to use.
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Li Yang <leoyang.li@nxp.com>
Diffstat (limited to 'Documentation/devicetree/bindings/soc')
| -rw-r--r-- | Documentation/devicetree/bindings/soc/fsl/cpm_qe/qe.txt | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/soc/fsl/cpm_qe/qe.txt b/Documentation/devicetree/bindings/soc/fsl/cpm_qe/qe.txt index d7afaff5faff..05ec2a838c54 100644 --- a/Documentation/devicetree/bindings/soc/fsl/cpm_qe/qe.txt +++ b/Documentation/devicetree/bindings/soc/fsl/cpm_qe/qe.txt @@ -18,7 +18,8 @@ Required properties: - reg : offset and length of the device registers. - bus-frequency : the clock frequency for QUICC Engine. - fsl,qe-num-riscs: define how many RISC engines the QE has. -- fsl,qe-num-snums: define how many serial number(SNUM) the QE can use for the +- fsl,qe-snums: This property has to be specified as '/bits/ 8' value, + defining the array of serial number (SNUM) values for the virtual threads. Optional properties: @@ -34,6 +35,11 @@ Recommended properties - brg-frequency : the internal clock source frequency for baud-rate generators in Hz. +Deprecated properties +- fsl,qe-num-snums: define how many serial number(SNUM) the QE can use + for the threads. Use fsl,qe-snums instead to not only specify the + number of snums, but also their values. + Example: qe@e0100000 { #address-cells = <1>; @@ -44,6 +50,11 @@ Example: reg = <e0100000 480>; brg-frequency = <0>; bus-frequency = <179A7B00>; + fsl,qe-snums = /bits/ 8 < + 0x04 0x05 0x0C 0x0D 0x14 0x15 0x1C 0x1D + 0x24 0x25 0x2C 0x2D 0x34 0x35 0x88 0x89 + 0x98 0x99 0xA8 0xA9 0xB8 0xB9 0xC8 0xC9 + 0xD8 0xD9 0xE8 0xE9>; } * Multi-User RAM (MURAM) |