From b629c698eae745eb51b6d92395e2eee44bbf5f49 Mon Sep 17 00:00:00 2001 From: Waqar Hameed Date: Tue, 13 Jun 2023 13:42:27 +0200 Subject: regmap: Add debugfs file for forcing field writes `_regmap_update_bits()` checks if the current register value differs from the new value, and only writes to the register if they differ. When testing hardware drivers, it might be desirable to always force a register write, for example when writing to a `regmap_field`. This enables and simplifies testing and verification of the hardware interaction. For example, when using a hardware mock/simulation model, one can then more easily verify that the driver makes the correct expected register writes during certain events. Add a bool variable `force_write_field` and a corresponding debugfs entry to enable this. Since this feature could interfere with driver operation, guard it with a macro. Signed-off-by: Waqar Hameed Link: https://lore.kernel.org/r/pnd1qifa7sj.fsf@axis.com Signed-off-by: Mark Brown --- drivers/base/regmap/internal.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/base/regmap/internal.h') diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h index 7211babbe4ee..9a9ea514c2d8 100644 --- a/drivers/base/regmap/internal.h +++ b/drivers/base/regmap/internal.h @@ -125,6 +125,9 @@ struct regmap { int reg_stride; int reg_stride_order; + /* If set, will always write field to HW. */ + bool force_write_field; + /* regcache specific members */ const struct regcache_ops *cache_ops; enum regcache_type cache_type; -- cgit