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author | Daniel Golle <daniel@makrotopia.org> | 2023-03-11 17:55:56 +0000 |
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committer | Daniel Golle <daniel@makrotopia.org> | 2023-03-27 19:07:54 +0100 |
commit | d308479d10f7c40ccff725f6c2252f6c94df0829 (patch) | |
tree | 276dcac24b13e0c9c6512fe0fdb277c903cc934d /target/linux/generic/backport-5.15/350-v5.18-regmap-add-configurable-downshift-for-addresses.patch | |
parent | 53dc9a60c05642e9596b25e5cfba1136a5d9e09e (diff) | |
download | upstream-d308479d10f7c40ccff725f6c2252f6c94df0829.tar.gz upstream-d308479d10f7c40ccff725f6c2252f6c94df0829.tar.bz2 upstream-d308479d10f7c40ccff725f6c2252f6c94df0829.zip |
generic: backport regmap reg_base and downshift features
Backport new regmap features from Linux 5.18 which are needed to let
mt7530 use pcs-mtk-lynxi.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Diffstat (limited to 'target/linux/generic/backport-5.15/350-v5.18-regmap-add-configurable-downshift-for-addresses.patch')
-rw-r--r-- | target/linux/generic/backport-5.15/350-v5.18-regmap-add-configurable-downshift-for-addresses.patch | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/350-v5.18-regmap-add-configurable-downshift-for-addresses.patch b/target/linux/generic/backport-5.15/350-v5.18-regmap-add-configurable-downshift-for-addresses.patch new file mode 100644 index 0000000000..99cd89ea00 --- /dev/null +++ b/target/linux/generic/backport-5.15/350-v5.18-regmap-add-configurable-downshift-for-addresses.patch @@ -0,0 +1,90 @@ +From 86fc59ef818beb0e1945d17f8e734898baba7e4e Mon Sep 17 00:00:00 2001 +From: Colin Foster <colin.foster@in-advantage.com> +Date: Sun, 13 Mar 2022 15:45:23 -0700 +Subject: [PATCH 1/2] 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 <colin.foster@in-advantage.com> +Link: https://lore.kernel.org/r/20220313224524.399947-2-colin.foster@in-advantage.com +Signed-off-by: Mark Brown <broonie@kernel.org> +--- + drivers/base/regmap/internal.h | 1 + + drivers/base/regmap/regmap.c | 5 +++++ + include/linux/regmap.h | 3 +++ + 3 files changed, 9 insertions(+) + +--- a/drivers/base/regmap/internal.h ++++ b/drivers/base/regmap/internal.h +@@ -31,6 +31,7 @@ struct regmap_format { + size_t buf_size; + size_t reg_bytes; + size_t pad_bytes; ++ size_t reg_downshift; + size_t val_bytes; + void (*format_write)(struct regmap *map, + unsigned int reg, unsigned int val); +--- a/drivers/base/regmap/regmap.c ++++ b/drivers/base/regmap/regmap.c +@@ -823,6 +823,7 @@ struct regmap *__regmap_init(struct devi + + map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8); + map->format.pad_bytes = config->pad_bits / 8; ++ map->format.reg_downshift = config->reg_downshift; + map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8); + map->format.buf_size = DIV_ROUND_UP(config->reg_bits + + config->val_bits + config->pad_bits, 8); +@@ -1735,6 +1736,7 @@ static int _regmap_raw_write_impl(struct + return ret; + } + ++ reg >>= map->format.reg_downshift; + map->format.format_reg(map->work_buf, reg, map->reg_shift); + regmap_set_work_buf_flag_mask(map, map->format.reg_bytes, + map->write_flag_mask); +@@ -1905,6 +1907,7 @@ static int _regmap_bus_formatted_write(v + return ret; + } + ++ reg >>= map->format.reg_downshift; + map->format.format_write(map, reg, val); + + trace_regmap_hw_write_start(map, reg, 1); +@@ -2346,6 +2349,7 @@ static int _regmap_raw_multi_reg_write(s + unsigned int reg = regs[i].reg; + unsigned int val = regs[i].def; + trace_regmap_hw_write_start(map, reg, 1); ++ reg >>= map->format.reg_downshift; + map->format.format_reg(u8, reg, map->reg_shift); + u8 += reg_bytes + pad_bytes; + map->format.format_val(u8, val, 0); +@@ -2673,6 +2677,7 @@ static int _regmap_raw_read(struct regma + return ret; + } + ++ reg >>= map->format.reg_downshift; + map->format.format_reg(map->work_buf, reg, map->reg_shift); + regmap_set_work_buf_flag_mask(map, map->format.reg_bytes, + map->read_flag_mask); +--- 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; + |