regmap: Add one flag to indicate if a hwlock should be used

Since the hwlock id 0 is valid for hardware spinlock core, but now id 0
is treated as one invalid value for regmap. Thus we should add one extra
flag for regmap config to indicate if a hardware spinlock should be used,
then id 0 can be valid for regmap to request.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

2 files changed, 3 insertions, 1 deletions

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index f25ab18ca057..d23a5c99b639 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -671,7 +671,7 @@ struct regmap *__regmap_init(struct device *dev,
                 map->lock = config->lock;
                 map->unlock = config->unlock;
                 map->lock_arg = config->lock_arg;
-        } else if (config->hwlock_id) {
+        } else if (config->use_hwlock) {
                 map->hwlock = hwspin_lock_request_specific(config->hwlock_id);
                 if (!map->hwlock) {
                         ret = -ENXIO;
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 15eddc1353ba..c78e0057df66 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -317,6 +317,7 @@ typedef void (*regmap_unlock)(void *);
  *
  * @ranges: Array of configuration entries for virtual address ranges.
  * @num_ranges: Number of range configuration entries.
+ * @use_hwlock: Indicate if a hardware spinlock should be used.
  * @hwlock_id: Specify the hardware spinlock id.
  * @hwlock_mode: The hardware spinlock mode, should be HWLOCK_IRQSTATE,
  *               HWLOCK_IRQ or 0.
@@ -365,6 +366,7 @@ struct regmap_config {
         const struct regmap_range_cfg *ranges;
         unsigned int num_ranges;
 
+        bool use_hwlock;
         unsigned int hwlock_id;
         unsigned int hwlock_mode;
 };