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iio: dac: ti-dac082s085: Fix alignment for DMA safety

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[ Upstream commit 03a0cc77f164e4e59b970d50c6e9a6caf06dae80 ]

____cacheline_aligned is an insufficient guarantee for non-coherent DMA
on platforms with 128 byte cachelines above L1.  Switch to the updated
IIO_DMA_MINALIGN definition.

Fixes: 61011264c1af ("iio: dac: Add Texas Instruments 8/10/12-bit 2/4-channel DAC driver")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-62-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jonathan Cameron 2022-05-08 18:56:41 +01:00 committed by Greg Kroah-Hartman
parent 7aa18f077f
commit c8942b7c25
1 changed files with 1 additions and 1 deletions
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drivers/iio/dac/ti-dac082s085.c
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@ -55,7 +55,7 @@ struct ti_dac_chip {
bool powerdown;
u8 powerdown_mode;
u8 resolution;
u8 buf[2] ____cacheline_aligned;
u8 buf[2] __aligned(IIO_DMA_MINALIGN);
};
#define WRITE_NOT_UPDATE(chan) (0x00 | (chan) << 6)