Commit c594b7f2 authored by Markus Pargmann's avatar Markus Pargmann Committed by Mark Brown
Browse files

regmap: Fix regmap_bulk_write for bus writes 



The regmap config does not prohibit val_bytes that are not powers of
two. But the current code of regmap_bulk_write for use_single_rw does
limit the possible val_bytes to 1, 2 and 4.

This patch fixes the behaviour to allow bus writes with non-standard
val_bytes sizes.

Cc: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: default avatarMarkus Pargmann <mpa@pengutronix.de>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent fa3eec77

drivers/base/regmap/regmap.c

+19 −2
Original line number Diff line number Diff line
@@ -1680,9 +1680,15 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, 


	/*

	 * Some devices don't support bulk write, for

	 * them we have a series of single write operations.

	 * them we have a series of single write operations in the first two if

	 * blocks.

	 *

	 * The first if block is used for memory mapped io. It does not allow

	 * val_bytes of 3 for example.

	 * The second one is used for busses which do not have this limitation

	 * and can write arbitrary value lengths.

	 */

	if (!map->bus || map->use_single_rw) {

	if (!map->bus) {

		map->lock(map->lock_arg);

		for (i = 0; i < val_count; i++) {

			unsigned int ival;
@@ -1714,6 +1720,17 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, 
		}

out:

		map->unlock(map->lock_arg);

	} else if (map->use_single_rw) {

		map->lock(map->lock_arg);

		for (i = 0; i < val_count; i++) {

			ret = _regmap_raw_write(map,

						reg + (i * map->reg_stride),

						val + (i * val_bytes),

						val_bytes);

			if (ret)

				break;

		}

		map->unlock(map->lock_arg);

	} else {

		void *wval;

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