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soc: ti: qmss: make acc queue support optional in the driver

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acc channels are available only if accumulator PDSP is loaded and
running in the SoC. As this requires firmware and user may not have
firmware in the file system, make the accumulator queue support
available in qmss driver optional. To use accumulator queus user needs
to add firmware to the file system and boot up kernel.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
This commit is contained in:
Murali Karicheri
2015-10-13 13:49:04 -07:00
committed by Santosh Shilimkar
parent 96ee19becc
commit 045016902b
4 changed files with 31 additions and 7 deletions
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6
Documentation/arm/keystone/knav-qmss.txt
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@@ -48,3 +48,9 @@ in the file system and boot up the kernel. User would see
"firmware file ks2_qmss_pdsp_acc48.bin downloaded for PDSP"
in the boot up log if loading of firmware to PDSP is successful.
Use of accumulated queues requires the firmware image to be present in the
file system. The driver doesn't acc queues to the supported queue range if
PDSP is not running in the SoC. The API call fails if there is a queue open
request to an acc queue and PDSP is not running. So make sure to copy firmware
to file system before using these queue types.