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authorNiklas Söderlund <niklas.soderlund+renesas@ragnatech.se>2016-11-12 17:04:25 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-19 20:17:57 +0100
commit9229336861cbe0f0c81dbe884d5721b4d81c21b2 (patch)
tree2f981f4428af98ecf4a49613fe236842064d8228 /Documentation
parent5e1595223a2c703b810c567b3071a6cc87af5890 (diff)
pinctrl: sh-pfc: Add helper to handle bias lookup table
commit c314c9f15aa5f43f0e5c0e2602cc65798dbd1598 upstream. On some SoC there are no simple mapping of pins to bias register bits and a lookup table is needed. This logic is already implemented in some SoC specific drivers that could benefit from a generic implementation. Add helpers to deal with the lookup which later can be used by the SoC specific drivers. The logic used to lookup are different from the one it aims to replace, this is intentional. This new method reduces the memory consumption at the cost of increased CPU usage and fix a bug where a WARN() would incorrectly be triggered if the register offset is 0. Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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