drm/bridge: tc358767: Use regmap_access_table for writeable registers

Using ranges it is easier to add more register where writing is not allowed,
especially for sequences of registers.

Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Robert Foss <rfoss@kernel.org>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231212075257.75084-2-alexander.stein@ew.tq-group.com

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index 615cc8f950d7b3e11d174f61559a13088af91179..b8b29b291b72fe124bb5c884cafc6facaad9c39c 100644 (file)
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -1992,12 +1992,15 @@ static const struct regmap_access_table tc_volatile_table = {
        .n_yes_ranges = ARRAY_SIZE(tc_volatile_ranges),
 };
 
-static bool tc_writeable_reg(struct device *dev, unsigned int reg)
-{
-       return (reg != TC_IDREG) &&
-              (reg != DP0_LTSTAT) &&
-              (reg != DP0_SNKLTCHGREQ);
-}
+static const struct regmap_range tc_non_writeable_ranges[] = {
+       regmap_reg_range(TC_IDREG, TC_IDREG),
+       regmap_reg_range(DP0_LTSTAT, DP0_SNKLTCHGREQ),
+};
+
+static const struct regmap_access_table tc_writeable_table = {
+       .no_ranges = tc_non_writeable_ranges,
+       .n_no_ranges = ARRAY_SIZE(tc_non_writeable_ranges),
+};
 
 static const struct regmap_config tc_regmap_config = {
        .name = "tc358767",
@@ -2008,7 +2011,7 @@ static const struct regmap_config tc_regmap_config = {
        .cache_type = REGCACHE_MAPLE,
        .readable_reg = tc_readable_reg,
        .volatile_table = &tc_volatile_table,
-       .writeable_reg = tc_writeable_reg,
+       .wr_table = &tc_writeable_table,
        .reg_format_endian = REGMAP_ENDIAN_BIG,
        .val_format_endian = REGMAP_ENDIAN_LITTLE,
 };