regulators: helpers: Fix handling of bypass_val_on in get_bypass_regmap

The handling of bypass_val_on that was added in
regulator_get_bypass_regmap is done unconditionally however
several drivers don't define a value for bypass_val_on. This
results in those drivers reporting bypass being enabled when
it is not. In regulator_set_bypass_regmap we use bypass_mask
if bypass_val_on is zero. This patch adds similar handling in
regulator_get_bypass_regmap.

Fixes: commit dd1a571daee7 ("regulator: helpers: Ensure bypass register field matches ON value")
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

path: root/tools/perf/tests/attr/test-record-graph-dwarf

[config]
command = record
args    = --call-graph dwarf -- kill >/dev/null 2>&1

[event:base-record]
sample_type=12583
exclude_callchain_user=1
sample_stack_user=8192
# TODO different for each arch, no support for that now
sample_regs_user=*