Kernel/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-01-18 10:56:14 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

regmap: Allow reads from write only registers with the flat cache

Browse Source 
The flat cache is intended for devices that need the lowest overhead so
doesn't track any sparseness.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230617-regmap-kunit-read-writeonly-flat-v1-1-efd3ed66dec6@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Mark Brown 2023-06-17 21:11:07 +01:00
parent 3e47b8877d
commit d0c99ffe21
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 12 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/base/regmap/regmap-kunit.c
View File

@ -252,9 +252,18 @@ static void read_writeonly(struct kunit *test)
for (i = 0; i < BLOCK_TEST_SIZE; i++)
data->read[i] = false;
/* Try to read all the registers, the writeonly one should fail */
for (i = 0; i < BLOCK_TEST_SIZE; i++)
KUNIT_EXPECT_EQ(test, i != 5, regmap_read(map, i, &val) == 0);
/*
* Try to read all the registers, the writeonly one should
* fail if we aren't using the flat cache.
*/
for (i = 0; i < BLOCK_TEST_SIZE; i++) {
if (t->type != REGCACHE_FLAT) {
KUNIT_EXPECT_EQ(test, i != 5,
regmap_read(map, i, &val) == 0);
} else {
KUNIT_EXPECT_EQ(test, 0, regmap_read(map, i, &val));
}
}
/* Did we trigger a hardware access? */
KUNIT_EXPECT_FALSE(test, data->read[5]);