soc: samsung: exynos-pmu: allow specifying read & write access tables for secure regmap

Accessing non-existent PMU registers causes an SError, halting the
system.

regmap can help us with that by allowing to pass the list of valid
registers as part of the config during creation. When this driver
creates a new regmap itself rather than relying on
syscon_node_to_regmap(), it's therefore easily possible to hook in
custom access tables for valid read and write registers.

Specifying access tables avoids SErrors for invalid registers and
instead the regmap core can just return an error. Outside drivers, this
is also helpful when using debugfs to access the regmap.

Make it possible for drivers to specify read and write tables to be
used on creation of the secure regmap by adding respective fields to
struct exynos_pmu_data. Also add kerneldoc to same struct while
updating it.

Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Signed-off-by: André Draszik <andre.draszik@linaro.org>
Link: https://patch.msgid.link/20251009-gs101-pmu-regmap-tables-v2-1-2d64f5261952@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

0 files changed, 0 insertions, 0 deletions