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| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2019-12-17 13:48:56 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-12-20 00:58:12 +0300 |
| commit | 0435bcd9e185803402a2566e78c1067c615bc579 (patch) | |
| tree | a9ce8130ca1e7f230342b57ed538ef628fcef33b | |
| parent | d1eef1c619749b2a57e514a3fa67d9a516ffa919 (diff) | |
| download | linux-0435bcd9e185803402a2566e78c1067c615bc579.tar.xz | |
docs: firmware-guide: ACPI: Replace dma_request_slave_channel() with dma_request_chan()
dma_request_chan() is the preferred API to request slave channels.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
[ rjw: Subject ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | Documentation/firmware-guide/acpi/enumeration.rst | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/Documentation/firmware-guide/acpi/enumeration.rst b/Documentation/firmware-guide/acpi/enumeration.rst index 0a72b6321f5f..c13fee8b02ba 100644 --- a/Documentation/firmware-guide/acpi/enumeration.rst +++ b/Documentation/firmware-guide/acpi/enumeration.rst @@ -71,8 +71,8 @@ DMA support DMA controllers enumerated via ACPI should be registered in the system to provide generic access to their resources. For example, a driver that would like to be accessible to slave devices via generic API call -dma_request_slave_channel() must register itself at the end of the probe -function like this:: +dma_request_chan() must register itself at the end of the probe function like +this:: err = devm_acpi_dma_controller_register(dev, xlate_func, dw); /* Handle the error if it's not a case of !CONFIG_ACPI */ @@ -112,15 +112,15 @@ could look like:: } #endif -dma_request_slave_channel() will call xlate_func() for each registered DMA -controller. In the xlate function the proper channel must be chosen based on +dma_request_chan() will call xlate_func() for each registered DMA controller. +In the xlate function the proper channel must be chosen based on information in struct acpi_dma_spec and the properties of the controller provided by struct acpi_dma. -Clients must call dma_request_slave_channel() with the string parameter that -corresponds to a specific FixedDMA resource. By default "tx" means the first -entry of the FixedDMA resource array, "rx" means the second entry. The table -below shows a layout:: +Clients must call dma_request_chan() with the string parameter that corresponds +to a specific FixedDMA resource. By default "tx" means the first entry of the +FixedDMA resource array, "rx" means the second entry. The table below shows a +layout:: Device (I2C0) { |