diff options
| author | Thierry Reding <treding@nvidia.com> | 2019-02-21 16:25:55 +0100 |
|---|---|---|
| committer | Philipp Zabel <p.zabel@pengutronix.de> | 2019-03-20 11:18:53 +0100 |
| commit | 22815f1825e4c50314e7084ca375f7368704fdd4 (patch) | |
| tree | 8024963b4f3f1a794b6aea2c76b5cb74903f89cf /drivers/reset | |
| parent | reset: Add acquired flag to of_reset_control_array_get() (diff) | |
| download | linux-22815f1825e4c50314e7084ca375f7368704fdd4.tar.xz linux-22815f1825e4c50314e7084ca375f7368704fdd4.zip | |
reset: Add acquire/release support for arrays
Add implementations that apply acquire and release operations to all
reset controls part of a reset control array.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Diffstat (limited to 'drivers/reset')
| -rw-r--r-- | drivers/reset/core.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/drivers/reset/core.c b/drivers/reset/core.c index f94da91c22af..81ea77cba123 100644 --- a/drivers/reset/core.c +++ b/drivers/reset/core.c @@ -245,6 +245,34 @@ err: return ret; } +static int reset_control_array_acquire(struct reset_control_array *resets) +{ + unsigned int i; + int err; + + for (i = 0; i < resets->num_rstcs; i++) { + err = reset_control_acquire(resets->rstc[i]); + if (err < 0) + goto release; + } + + return 0; + +release: + while (i--) + reset_control_release(resets->rstc[i]); + + return err; +} + +static void reset_control_array_release(struct reset_control_array *resets) +{ + unsigned int i; + + for (i = 0; i < resets->num_rstcs; i++) + reset_control_release(resets->rstc[i]); +} + static inline bool reset_control_is_array(struct reset_control *rstc) { return rstc->array; @@ -464,6 +492,9 @@ int reset_control_acquire(struct reset_control *rstc) if (WARN_ON(IS_ERR(rstc))) return -EINVAL; + if (reset_control_is_array(rstc)) + return reset_control_array_acquire(rstc_to_array(rstc)); + mutex_lock(&reset_list_mutex); if (rstc->acquired) { @@ -502,7 +533,10 @@ void reset_control_release(struct reset_control *rstc) if (!rstc || WARN_ON(IS_ERR(rstc))) return; - rstc->acquired = false; + if (reset_control_is_array(rstc)) + reset_control_array_release(rstc_to_array(rstc)); + else + rstc->acquired = false; } EXPORT_SYMBOL_GPL(reset_control_release); |