From: Jean-Baptiste Maneyrol Date: Fri, 7 Jun 2024 08:10:39 +0000 (+0000) Subject: iio: imu: inv_icm42600: add register caching in the regmap X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=50cfe81b71e50d7a7f6afb84d5dbe084ed4ea174;p=users%2Fjedix%2Flinux-maple.git iio: imu: inv_icm42600: add register caching in the regmap Register caching is improving bus access a lot because of the register window bank setting. Previously, bank register was set for every register access. Now with caching, it happens only when changing bank which is very infrequent. Signed-off-by: Jean-Baptiste Maneyrol Link: https://lore.kernel.org/r/20240607081039.789079-1-inv.git-commit@tdk.com Signed-off-by: Jonathan Cameron --- diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c index 96116a68ab29..ada5a8cca629 100644 --- a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c @@ -34,12 +34,56 @@ static const struct regmap_range_cfg inv_icm42600_regmap_ranges[] = { }, }; +static const struct regmap_range inv_icm42600_regmap_volatile_yes_ranges[] = { + /* Sensor data registers */ + regmap_reg_range(0x001D, 0x002A), + /* INT status, FIFO, APEX data */ + regmap_reg_range(0x002D, 0x0038), + /* Signal path reset */ + regmap_reg_range(0x004B, 0x004B), + /* FIFO lost packets */ + regmap_reg_range(0x006C, 0x006D), + /* Timestamp value */ + regmap_reg_range(0x1062, 0x1064), +}; + +static const struct regmap_range inv_icm42600_regmap_volatile_no_ranges[] = { + regmap_reg_range(0x0000, 0x001C), + regmap_reg_range(0x006E, 0x1061), + regmap_reg_range(0x1065, 0x4FFF), +}; + +static const struct regmap_access_table inv_icm42600_regmap_volatile_accesses[] = { + { + .yes_ranges = inv_icm42600_regmap_volatile_yes_ranges, + .n_yes_ranges = ARRAY_SIZE(inv_icm42600_regmap_volatile_yes_ranges), + .no_ranges = inv_icm42600_regmap_volatile_no_ranges, + .n_no_ranges = ARRAY_SIZE(inv_icm42600_regmap_volatile_no_ranges), + }, +}; + +static const struct regmap_range inv_icm42600_regmap_rd_noinc_no_ranges[] = { + regmap_reg_range(0x0000, INV_ICM42600_REG_FIFO_DATA - 1), + regmap_reg_range(INV_ICM42600_REG_FIFO_DATA + 1, 0x4FFF), +}; + +static const struct regmap_access_table inv_icm42600_regmap_rd_noinc_accesses[] = { + { + .no_ranges = inv_icm42600_regmap_rd_noinc_no_ranges, + .n_no_ranges = ARRAY_SIZE(inv_icm42600_regmap_rd_noinc_no_ranges), + }, +}; + const struct regmap_config inv_icm42600_regmap_config = { + .name = "inv_icm42600", .reg_bits = 8, .val_bits = 8, .max_register = 0x4FFF, .ranges = inv_icm42600_regmap_ranges, .num_ranges = ARRAY_SIZE(inv_icm42600_regmap_ranges), + .volatile_table = inv_icm42600_regmap_volatile_accesses, + .rd_noinc_table = inv_icm42600_regmap_rd_noinc_accesses, + .cache_type = REGCACHE_RBTREE, }; EXPORT_SYMBOL_NS_GPL(inv_icm42600_regmap_config, IIO_ICM42600);