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path: root/drivers/reset/core.c
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Diffstat (limited to 'drivers/reset/core.c')
-rw-r--r--drivers/reset/core.c48
1 files changed, 46 insertions, 2 deletions
diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index 682d61812852..22f67fc77ae5 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -1236,23 +1236,46 @@ static void devm_reset_control_release(struct device *dev, void *res)
reset_control_put(*(struct reset_control **)res);
}
+static void devm_reset_control_release_deasserted(struct device *dev, void *res)
+{
+ struct reset_control *rstc = *(struct reset_control **)res;
+
+ reset_control_assert(rstc);
+ reset_control_put(rstc);
+}
+
struct reset_control *
__devm_reset_control_get(struct device *dev, const char *id, int index,
enum reset_control_flags flags)
{
struct reset_control **ptr, *rstc;
+ bool deasserted = flags & RESET_CONTROL_FLAGS_BIT_DEASSERTED;
- ptr = devres_alloc(devm_reset_control_release, sizeof(*ptr),
+ ptr = devres_alloc(deasserted ? devm_reset_control_release_deasserted :
+ devm_reset_control_release, sizeof(*ptr),
GFP_KERNEL);
if (!ptr)
return ERR_PTR(-ENOMEM);
+ flags &= ~RESET_CONTROL_FLAGS_BIT_DEASSERTED;
+
rstc = __reset_control_get(dev, id, index, flags);
if (IS_ERR_OR_NULL(rstc)) {
devres_free(ptr);
return rstc;
}
+ if (deasserted) {
+ int ret;
+
+ ret = reset_control_deassert(rstc);
+ if (ret) {
+ reset_control_put(rstc);
+ devres_free(ptr);
+ return ERR_PTR(ret);
+ }
+ }
+
*ptr = rstc;
devres_add(dev, ptr);
@@ -1272,24 +1295,45 @@ static void devm_reset_control_bulk_release(struct device *dev, void *res)
reset_control_bulk_put(devres->num_rstcs, devres->rstcs);
}
+static void devm_reset_control_bulk_release_deasserted(struct device *dev, void *res)
+{
+ struct reset_control_bulk_devres *devres = res;
+
+ reset_control_bulk_assert(devres->num_rstcs, devres->rstcs);
+ reset_control_bulk_put(devres->num_rstcs, devres->rstcs);
+}
+
int __devm_reset_control_bulk_get(struct device *dev, int num_rstcs,
struct reset_control_bulk_data *rstcs,
enum reset_control_flags flags)
{
struct reset_control_bulk_devres *ptr;
+ bool deasserted = flags & RESET_CONTROL_FLAGS_BIT_DEASSERTED;
int ret;
- ptr = devres_alloc(devm_reset_control_bulk_release, sizeof(*ptr),
+ ptr = devres_alloc(deasserted ? devm_reset_control_bulk_release_deasserted :
+ devm_reset_control_bulk_release, sizeof(*ptr),
GFP_KERNEL);
if (!ptr)
return -ENOMEM;
+ flags &= ~RESET_CONTROL_FLAGS_BIT_DEASSERTED;
+
ret = __reset_control_bulk_get(dev, num_rstcs, rstcs, flags);
if (ret < 0) {
devres_free(ptr);
return ret;
}
+ if (deasserted) {
+ ret = reset_control_bulk_deassert(num_rstcs, rstcs);
+ if (ret) {
+ reset_control_bulk_put(num_rstcs, rstcs);
+ devres_free(ptr);
+ return ret;
+ }
+ }
+
ptr->num_rstcs = num_rstcs;
ptr->rstcs = rstcs;
devres_add(dev, ptr);