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SubjectApplied "regmap: Add one flag to indicate if a hwlock should be used" to the regmap tree
The patch

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

has been applied to the regmap tree at

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From a4887813c3a9481ab87c8a71ab1de50b975cc823 Mon Sep 17 00:00:00 2001
From: Baolin Wang <>
Date: Mon, 25 Dec 2017 14:37:09 +0800
Subject: [PATCH] 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 <>
Signed-off-by: Mark Brown <>
drivers/base/regmap/regmap.c | 2 +-
include/linux/regmap.h | 2 ++
2 files changed, 3 insertions(+), 1 deletion(-)

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;
 \ /
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