return ret;
}
-static int clk_set_default_parents(struct udevice *dev)
+static int clk_set_default_parents(struct udevice *dev, int stage)
{
struct clk clk, parent_clk;
int index;
return ret;
}
- ret = clk_set_parent(&clk, &parent_clk);
+ /* This is clk provider device trying to reparent itself
+ * It cannot be done right now but need to wait after the
+ * device is probed
+ */
+ if (stage == 0 && clk.dev == dev)
+ continue;
+ if (stage > 0 && clk.dev != dev)
+ /* do not setup twice the parent clocks */
+ continue;
+
+ ret = clk_set_parent(&clk, &parent_clk);
/*
* Not all drivers may support clock-reparenting (as of now).
* Ignore errors due to this.
if (ret == -ENOSYS)
continue;
- if (ret) {
+ if (ret < 0) {
debug("%s: failed to reparent clock %d for %s\n",
__func__, index, dev_read_name(dev));
return ret;
return 0;
}
-static int clk_set_default_rates(struct udevice *dev)
+static int clk_set_default_rates(struct udevice *dev, int stage)
{
struct clk clk;
int index;
continue;
}
+ /* This is clk provider device trying to program itself
+ * It cannot be done right now but need to wait after the
+ * device is probed
+ */
+ if (stage == 0 && clk.dev == dev)
+ continue;
+
+ if (stage > 0 && clk.dev != dev)
+ /* do not setup twice the parent clocks */
+ continue;
+
ret = clk_set_rate(&clk, rates[index]);
+
if (ret < 0) {
debug("%s: failed to set rate on clock index %d (%ld) for %s\n",
__func__, index, clk.id, dev_read_name(dev));
return ret;
}
-int clk_set_defaults(struct udevice *dev)
+int clk_set_defaults(struct udevice *dev, int stage)
{
int ret;
+ if (!dev_of_valid(dev))
+ return 0;
+
/* If this not in SPL and pre-reloc state, don't take any action. */
if (!(IS_ENABLED(CONFIG_SPL_BUILD) || (gd->flags & GD_FLG_RELOC)))
return 0;
debug("%s(%s)\n", __func__, dev_read_name(dev));
- ret = clk_set_default_parents(dev);
+ ret = clk_set_default_parents(dev, stage);
if (ret)
return ret;
- ret = clk_set_default_rates(dev);
+ ret = clk_set_default_rates(dev, stage);
if (ret < 0)
return ret;
return clk_get_by_index(dev, index, clk);
}
+int clk_get_by_name_nodev(ofnode node, const char *name, struct clk *clk)
+{
+ int index;
+
+ debug("%s(node=%p, name=%s, clk=%p)\n", __func__,
+ ofnode_get_name(node), name, clk);
+ clk->dev = NULL;
+
+ index = ofnode_stringlist_search(node, "clock-names", name);
+ if (index < 0) {
+ debug("fdt_stringlist_search() failed: %d\n", index);
+ return index;
+ }
+
+ return clk_get_by_index_nodev(node, index, clk);
+}
+
+int clk_get_optional_nodev(ofnode node, const char *name, struct clk *clk)
+{
+ int ret;
+
+ ret = clk_get_by_name_nodev(node, name, clk);
+ if (ret == -ENODATA)
+ return 0;
+
+ return ret;
+}
+
int clk_release_all(struct clk *clk, int count)
{
int i, ret;
int clk_request(struct udevice *dev, struct clk *clk)
{
- const struct clk_ops *ops = clk_dev_ops(dev);
+ const struct clk_ops *ops;
debug("%s(dev=%p, clk=%p)\n", __func__, dev, clk);
+ if (!clk)
+ return 0;
+ ops = clk_dev_ops(dev);
clk->dev = dev;
int clk_free(struct clk *clk)
{
- const struct clk_ops *ops = clk_dev_ops(clk->dev);
+ const struct clk_ops *ops;
debug("%s(clk=%p)\n", __func__, clk);
+ if (!clk_valid(clk))
+ return 0;
+ ops = clk_dev_ops(clk->dev);
if (!ops->free)
return 0;
ulong clk_get_rate(struct clk *clk)
{
- const struct clk_ops *ops = clk_dev_ops(clk->dev);
+ const struct clk_ops *ops;
debug("%s(clk=%p)\n", __func__, clk);
+ if (!clk_valid(clk))
+ return 0;
+ ops = clk_dev_ops(clk->dev);
if (!ops->get_rate)
return -ENOSYS;
struct clk *pclk;
debug("%s(clk=%p)\n", __func__, clk);
+ if (!clk_valid(clk))
+ return NULL;
pdev = dev_get_parent(clk->dev);
pclk = dev_get_clk_ptr(pdev);
struct clk *pclk;
debug("%s(clk=%p)\n", __func__, clk);
+ if (!clk_valid(clk))
+ return 0;
pclk = clk_get_parent(clk);
if (IS_ERR(pclk))
ulong clk_set_rate(struct clk *clk, ulong rate)
{
- const struct clk_ops *ops = clk_dev_ops(clk->dev);
+ const struct clk_ops *ops;
debug("%s(clk=%p, rate=%lu)\n", __func__, clk, rate);
+ if (!clk_valid(clk))
+ return 0;
+ ops = clk_dev_ops(clk->dev);
if (!ops->set_rate)
return -ENOSYS;
int clk_set_parent(struct clk *clk, struct clk *parent)
{
- const struct clk_ops *ops = clk_dev_ops(clk->dev);
+ const struct clk_ops *ops;
debug("%s(clk=%p, parent=%p)\n", __func__, clk, parent);
+ if (!clk_valid(clk))
+ return 0;
+ ops = clk_dev_ops(clk->dev);
if (!ops->set_parent)
return -ENOSYS;
int clk_enable(struct clk *clk)
{
- const struct clk_ops *ops = clk_dev_ops(clk->dev);
+ const struct clk_ops *ops;
+ struct clk *clkp = NULL;
+ int ret;
debug("%s(clk=%p)\n", __func__, clk);
+ if (!clk_valid(clk))
+ return 0;
+ ops = clk_dev_ops(clk->dev);
+
+ if (CONFIG_IS_ENABLED(CLK_CCF)) {
+ /* Take id 0 as a non-valid clk, such as dummy */
+ if (clk->id && !clk_get_by_id(clk->id, &clkp)) {
+ if (clkp->enable_count) {
+ clkp->enable_count++;
+ return 0;
+ }
+ if (clkp->dev->parent &&
+ device_get_uclass_id(clkp->dev) == UCLASS_CLK) {
+ ret = clk_enable(dev_get_clk_ptr(clkp->dev->parent));
+ if (ret) {
+ printf("Enable %s failed\n",
+ clkp->dev->parent->name);
+ return ret;
+ }
+ }
+ }
- if (!ops->enable)
- return -ENOSYS;
+ if (ops->enable) {
+ ret = ops->enable(clk);
+ if (ret) {
+ printf("Enable %s failed\n", clk->dev->name);
+ return ret;
+ }
+ }
+ if (clkp)
+ clkp->enable_count++;
+ } else {
+ if (!ops->enable)
+ return -ENOSYS;
+ return ops->enable(clk);
+ }
- return ops->enable(clk);
+ return 0;
}
int clk_enable_bulk(struct clk_bulk *bulk)
int clk_disable(struct clk *clk)
{
- const struct clk_ops *ops = clk_dev_ops(clk->dev);
+ const struct clk_ops *ops;
+ struct clk *clkp = NULL;
+ int ret;
debug("%s(clk=%p)\n", __func__, clk);
+ if (!clk_valid(clk))
+ return 0;
+ ops = clk_dev_ops(clk->dev);
+
+ if (CONFIG_IS_ENABLED(CLK_CCF)) {
+ if (clk->id && !clk_get_by_id(clk->id, &clkp)) {
+ if (clkp->enable_count == 0) {
+ printf("clk %s already disabled\n",
+ clkp->dev->name);
+ return 0;
+ }
+
+ if (--clkp->enable_count > 0)
+ return 0;
+ }
- if (!ops->disable)
- return -ENOSYS;
+ if (ops->disable) {
+ ret = ops->disable(clk);
+ if (ret)
+ return ret;
+ }
+
+ if (clkp && clkp->dev->parent &&
+ device_get_uclass_id(clkp->dev) == UCLASS_CLK) {
+ ret = clk_disable(dev_get_clk_ptr(clkp->dev->parent));
+ if (ret) {
+ printf("Disable %s failed\n",
+ clkp->dev->parent->name);
+ return ret;
+ }
+ }
+ } else {
+ if (!ops->disable)
+ return -ENOSYS;
- return ops->disable(clk);
+ return ops->disable(clk);
+ }
+
+ return 0;
}
int clk_disable_bulk(struct clk_bulk *bulk)
return -ENOENT;
}
+bool clk_is_match(const struct clk *p, const struct clk *q)
+{
+ /* trivial case: identical struct clk's or both NULL */
+ if (p == q)
+ return true;
+
+ /* trivial case #2: on the clk pointer is NULL */
+ if (!p || !q)
+ return false;
+
+ /* same device, id and data */
+ if (p->dev == q->dev && p->id == q->id && p->data == q->data)
+ return true;
+
+ return false;
+}
+
+static void devm_clk_release(struct udevice *dev, void *res)
+{
+ clk_free(res);
+}
+
+static int devm_clk_match(struct udevice *dev, void *res, void *data)
+{
+ return res == data;
+}
+
+struct clk *devm_clk_get(struct udevice *dev, const char *id)
+{
+ int rc;
+ struct clk *clk;
+
+ clk = devres_alloc(devm_clk_release, sizeof(struct clk), __GFP_ZERO);
+ if (unlikely(!clk))
+ return ERR_PTR(-ENOMEM);
+
+ rc = clk_get_by_name(dev, id, clk);
+ if (rc)
+ return ERR_PTR(rc);
+
+ devres_add(dev, clk);
+ return clk;
+}
+
+struct clk *devm_clk_get_optional(struct udevice *dev, const char *id)
+{
+ struct clk *clk = devm_clk_get(dev, id);
+
+ if (PTR_ERR(clk) == -ENODATA)
+ return NULL;
+
+ return clk;
+}
+
+void devm_clk_put(struct udevice *dev, struct clk *clk)
+{
+ int rc;
+
+ if (!clk)
+ return;
+
+ rc = devres_release(dev, devm_clk_release, devm_clk_match, clk);
+ WARN_ON(rc);
+}
+
+int clk_uclass_post_probe(struct udevice *dev)
+{
+ /*
+ * when a clock provider is probed. Call clk_set_defaults()
+ * also after the device is probed. This takes care of cases
+ * where the DT is used to setup default parents and rates
+ * using assigned-clocks
+ */
+ clk_set_defaults(dev, 1);
+
+ return 0;
+}
+
UCLASS_DRIVER(clk) = {
.id = UCLASS_CLK,
.name = "clk",
+ .post_probe = clk_uclass_post_probe,
};
projects / oweals / u-boot.git / blobdiff