1e4469b090
Backport qca8k new feature: - Ageing configuration support - Add 2 missing counter on qca8337 - Convert to regmap - Standardize define and code with GENMASK AND BITFILED macro - Add mdb add/del support Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
52 lines
2.3 KiB
Diff
52 lines
2.3 KiB
Diff
From 02d6fdecb9c38de19065f6bed8d5214556fd061d Mon Sep 17 00:00:00 2001
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From: Ansuel Smith <ansuelsmth@gmail.com>
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Date: Thu, 4 Nov 2021 16:00:40 +0100
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Subject: regmap: allow to define reg_update_bits for no bus configuration
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Some device requires a special handling for reg_update_bits and can't use
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the normal regmap read write logic. An example is when locking is
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handled by the device and rmw operations requires to do atomic operations.
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Allow to declare a dedicated function in regmap_config for
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reg_update_bits in no bus configuration.
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Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
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Link: https://lore.kernel.org/r/20211104150040.1260-1-ansuelsmth@gmail.com
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Signed-off-by: Mark Brown <broonie@kernel.org>
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---
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drivers/base/regmap/regmap.c | 1 +
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include/linux/regmap.h | 7 +++++++
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2 files changed, 8 insertions(+)
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--- a/drivers/base/regmap/regmap.c
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+++ b/drivers/base/regmap/regmap.c
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@@ -841,6 +841,7 @@ struct regmap *__regmap_init(struct devi
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if (!bus) {
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map->reg_read = config->reg_read;
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map->reg_write = config->reg_write;
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+ map->reg_update_bits = config->reg_update_bits;
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map->defer_caching = false;
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goto skip_format_initialization;
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--- a/include/linux/regmap.h
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+++ b/include/linux/regmap.h
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@@ -289,6 +289,11 @@ typedef void (*regmap_unlock)(void *);
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* read operation on a bus such as SPI, I2C, etc. Most of the
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* devices do not need this.
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* @reg_write: Same as above for writing.
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+ * @reg_update_bits: Optional callback that if filled will be used to perform
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+ * all the update_bits(rmw) operation. Should only be provided
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+ * if the function require special handling with lock and reg
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+ * handling and the operation cannot be represented as a simple
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+ * update_bits operation on a bus such as SPI, I2C, etc.
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* @fast_io: Register IO is fast. Use a spinlock instead of a mutex
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* to perform locking. This field is ignored if custom lock/unlock
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* functions are used (see fields lock/unlock of struct regmap_config).
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@@ -366,6 +371,8 @@ struct regmap_config {
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int (*reg_read)(void *context, unsigned int reg, unsigned int *val);
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int (*reg_write)(void *context, unsigned int reg, unsigned int val);
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+ int (*reg_update_bits)(void *context, unsigned int reg,
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+ unsigned int mask, unsigned int val);
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bool fast_io;
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