From 86fc59ef818beb0e1945d17f8e734898baba7e4e Mon Sep 17 00:00:00 2001 From: Colin Foster Date: Sun, 13 Mar 2022 15:45:23 -0700 Subject: regmap: add configurable downshift for addresses Add an additional reg_downshift to be applied to register addresses before any register accesses. An example of a device that uses this is a VSC7514 chip, which require each register address to be downshifted by two if the access is performed over a SPI bus. Signed-off-by: Colin Foster Link: https://lore.kernel.org/r/20220313224524.399947-2-colin.foster@in-advantage.com Signed-off-by: Mark Brown --- include/linux/regmap.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/regmap.h b/include/linux/regmap.h index 22652e5fbc38..40fb9399add6 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -237,6 +237,8 @@ typedef void (*regmap_unlock)(void *); * @reg_stride: The register address stride. Valid register addresses are a * multiple of this value. If set to 0, a value of 1 will be * used. + * @reg_downshift: The number of bits to downshift the register before + * performing any operations. * @pad_bits: Number of bits of padding between register and value. * @val_bits: Number of bits in a register value, mandatory. * @@ -360,6 +362,7 @@ struct regmap_config { int reg_bits; int reg_stride; + int reg_downshift; int pad_bits; int val_bits; -- cgit v1.2.3-71-gd317