diff options
Diffstat (limited to 'pkgs/patches-linux-5.15/081-net-next-regmap-allow-to-define-reg_update_bits-for-no-bus.patch')
| -rw-r--r-- | pkgs/patches-linux-5.15/081-net-next-regmap-allow-to-define-reg_update_bits-for-no-bus.patch | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/pkgs/patches-linux-5.15/081-net-next-regmap-allow-to-define-reg_update_bits-for-no-bus.patch b/pkgs/patches-linux-5.15/081-net-next-regmap-allow-to-define-reg_update_bits-for-no-bus.patch new file mode 100644 index 0000000..e4c0833 --- /dev/null +++ b/pkgs/patches-linux-5.15/081-net-next-regmap-allow-to-define-reg_update_bits-for-no-bus.patch @@ -0,0 +1,52 @@ +From 02d6fdecb9c38de19065f6bed8d5214556fd061d Mon Sep 17 00:00:00 2001 +From: Ansuel Smith <ansuelsmth@gmail.com> +Date: Thu, 4 Nov 2021 16:00:40 +0100 +Subject: regmap: allow to define reg_update_bits for no bus configuration + +Some device requires a special handling for reg_update_bits and can't use +the normal regmap read write logic. An example is when locking is +handled by the device and rmw operations requires to do atomic operations. +Allow to declare a dedicated function in regmap_config for +reg_update_bits in no bus configuration. + +Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> +Link: https://lore.kernel.org/r/20211104150040.1260-1-ansuelsmth@gmail.com +Signed-off-by: Mark Brown <broonie@kernel.org> +--- + drivers/base/regmap/regmap.c | 1 + + include/linux/regmap.h | 7 +++++++ + 2 files changed, 8 insertions(+) + +--- a/drivers/base/regmap/regmap.c ++++ b/drivers/base/regmap/regmap.c +@@ -877,6 +877,7 @@ struct regmap *__regmap_init(struct devi + if (!bus) { + map->reg_read = config->reg_read; + map->reg_write = config->reg_write; ++ map->reg_update_bits = config->reg_update_bits; + + map->defer_caching = false; + goto skip_format_initialization; +--- a/include/linux/regmap.h ++++ b/include/linux/regmap.h +@@ -290,6 +290,11 @@ typedef void (*regmap_unlock)(void *); + * read operation on a bus such as SPI, I2C, etc. Most of the + * devices do not need this. + * @reg_write: Same as above for writing. ++ * @reg_update_bits: Optional callback that if filled will be used to perform ++ * all the update_bits(rmw) operation. Should only be provided ++ * if the function require special handling with lock and reg ++ * handling and the operation cannot be represented as a simple ++ * update_bits operation on a bus such as SPI, I2C, etc. + * @fast_io: Register IO is fast. Use a spinlock instead of a mutex + * to perform locking. This field is ignored if custom lock/unlock + * functions are used (see fields lock/unlock of struct regmap_config). +@@ -372,6 +377,8 @@ struct regmap_config { + + int (*reg_read)(void *context, unsigned int reg, unsigned int *val); + int (*reg_write)(void *context, unsigned int reg, unsigned int val); ++ int (*reg_update_bits)(void *context, unsigned int reg, ++ unsigned int mask, unsigned int val); + + bool fast_io; + |