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authorColin Foster <colin.foster@in-advantage.com>2022-03-14 01:45:24 +0300
committerMark Brown <broonie@kernel.org>2022-03-18 19:53:19 +0300
commit0074f3f2b1e43d3cedd97e47fb6980db6d2ba79e (patch)
treebc31c30f65706f89a436cb67d8549a46b77db497 /include/linux/regmap.h
parent86fc59ef818beb0e1945d17f8e734898baba7e4e (diff)
downloadlinux-0074f3f2b1e43d3cedd97e47fb6980db6d2ba79e.tar.xz
regmap: allow a defined reg_base to be added to every address
There's an inconsistency that arises when a register set can be accessed internally via MMIO, or externally via SPI. The VSC7514 chip allows both modes of operation. When internally accessed, the system utilizes __iomem, devm_ioremap_resource, and devm_regmap_init_mmio. For SPI it isn't possible to utilize memory-mapped IO. To properly operate, the resource base must be added to the register before every operation. Signed-off-by: Colin Foster <colin.foster@in-advantage.com> Link: https://lore.kernel.org/r/20220313224524.399947-3-colin.foster@in-advantage.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/linux/regmap.h')
-rw-r--r--include/linux/regmap.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 40fb9399add6..de81a94d7b30 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -239,6 +239,8 @@ typedef void (*regmap_unlock)(void *);
* used.
* @reg_downshift: The number of bits to downshift the register before
* performing any operations.
+ * @reg_base: Value to be added to every register address before performing any
+ * operation.
* @pad_bits: Number of bits of padding between register and value.
* @val_bits: Number of bits in a register value, mandatory.
*
@@ -363,6 +365,7 @@ struct regmap_config {
int reg_bits;
int reg_stride;
int reg_downshift;
+ unsigned int reg_base;
int pad_bits;
int val_bits;