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

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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>
This commit is contained in:
Baolin Wang 2017-12-25 14:37:09 +08:00 committed by Mark Brown
parent a1a68fcaf1
commit a4887813c3
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GPG key ID: 24D68B725D5487D0
2 changed files with 3 additions and 1 deletions
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2
drivers/base/regmap/regmap.c
View file

@ -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;

2
include/linux/regmap.h
View file

@ -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;
};