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iio: make st_sensors drivers use regmap

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This patch is meant to replace the i2c/spi transfer functions with
regmap. SPI framework requires DMA safe buffers so let's add GFP_DMA
flag for memory allocation used by bulk_read functions.

Signed-off-by: Denis Ciocca <denis.ciocca@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Denis Ciocca 2019-07-18 15:53:53 -07:00 • committed by Jonathan Cameron
commit 062809ef77
19 changed files with 104 additions and 212 deletions
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