ASoC: fsl: dma: use platform helpers and devm cleanup

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Convert fsl_soc_dma_probe() to managed APIs. Replace the open-coded
of_address_to_resource()/of_iomap() of the DMA channel registers with
devm_platform_ioremap_resource(), and irq_of_parse_and_map() with
platform_get_irq() (which returns a negative errno instead of 0).
Switch the allocation to devm_kzalloc() and register the component via
the devm variant, dropping the now-unneeded error-path cleanup and the
manual fsl_soc_dma_remove().

The SSI node's register resource is still read via of_address_to_resource()
to compute the SSI FIFO physical addresses (dma->ssi_stx_phys /
ssi_srx_phys); only the DMA controller window is mapped.

The DMA controller register window is owned solely by this driver, so the
new region request from devm_platform_ioremap_resource() cannot conflict
with another claimant, and it is mapped exactly once (no double mapping).

The local channel pointer is declared as void __iomem * so the
devm_platform_ioremap_resource() result can be stored before assignment
to dma->channel.

No functional change; built for powerpc (allmodconfig + CONFIG_SND_SOC_FSL_DMA)
with LLVM=1 and sound/soc/fsl/fsl_dma.o compiles cleanly.

Assisted-by: opencode:hy3-free
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20260721225442.817787-1-rosenp@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

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Rosen Penev 2026-07-21 15:54:42 -07:00 • committed by Mark Brown

parent 62d0a0bd67

commit 522d7baa39

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1 changed files with 27 additions and 41 deletions

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sound/soc/fsl/fsl_dma.c

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