#include <dm/read.h>
#include <dt-structs.h>
#include <errno.h>
+#include <linux/clk-provider.h>
static inline const struct clk_ops *clk_dev_ops(struct udevice *dev)
{
return 0;
}
-static int clk_get_by_indexed_prop(struct udevice *dev, const char *prop_name,
- int index, struct clk *clk)
+static int clk_get_by_index_tail(int ret, ofnode node,
+ struct ofnode_phandle_args *args,
+ const char *list_name, int index,
+ struct clk *clk)
{
- int ret;
- struct ofnode_phandle_args args;
struct udevice *dev_clk;
const struct clk_ops *ops;
- debug("%s(dev=%p, index=%d, clk=%p)\n", __func__, dev, index, clk);
-
assert(clk);
clk->dev = NULL;
+ if (ret)
+ goto err;
- ret = dev_read_phandle_with_args(dev, prop_name, "#clock-cells", 0,
- index, &args);
- if (ret) {
- debug("%s: fdtdec_parse_phandle_with_args failed: err=%d\n",
- __func__, ret);
- return ret;
- }
-
- ret = uclass_get_device_by_ofnode(UCLASS_CLK, args.node, &dev_clk);
+ ret = uclass_get_device_by_ofnode(UCLASS_CLK, args->node, &dev_clk);
if (ret) {
debug("%s: uclass_get_device_by_of_offset failed: err=%d\n",
__func__, ret);
ops = clk_dev_ops(dev_clk);
if (ops->of_xlate)
- ret = ops->of_xlate(clk, &args);
+ ret = ops->of_xlate(clk, args);
else
- ret = clk_of_xlate_default(clk, &args);
+ ret = clk_of_xlate_default(clk, args);
if (ret) {
debug("of_xlate() failed: %d\n", ret);
return ret;
}
return clk_request(dev_clk, clk);
+err:
+ debug("%s: Node '%s', property '%s', failed to request CLK index %d: %d\n",
+ __func__, ofnode_get_name(node), list_name, index, ret);
+ return ret;
+}
+
+static int clk_get_by_indexed_prop(struct udevice *dev, const char *prop_name,
+ int index, struct clk *clk)
+{
+ int ret;
+ struct ofnode_phandle_args args;
+
+ debug("%s(dev=%p, index=%d, clk=%p)\n", __func__, dev, index, clk);
+
+ assert(clk);
+ clk->dev = NULL;
+
+ ret = dev_read_phandle_with_args(dev, prop_name, "#clock-cells", 0,
+ index, &args);
+ if (ret) {
+ debug("%s: fdtdec_parse_phandle_with_args failed: err=%d\n",
+ __func__, ret);
+ return ret;
+ }
+
+
+ return clk_get_by_index_tail(ret, dev_ofnode(dev), &args, "clocks",
+ index > 0, clk);
}
int clk_get_by_index(struct udevice *dev, int index, struct clk *clk)
{
- return clk_get_by_indexed_prop(dev, "clocks", index, clk);
+ struct ofnode_phandle_args args;
+ int ret;
+
+ ret = dev_read_phandle_with_args(dev, "clocks", "#clock-cells", 0,
+ index, &args);
+
+ return clk_get_by_index_tail(ret, dev_ofnode(dev), &args, "clocks",
+ index > 0, clk);
+}
+
+int clk_get_by_index_nodev(ofnode node, int index, struct clk *clk)
+{
+ struct ofnode_phandle_args args;
+ int ret;
+
+ ret = ofnode_parse_phandle_with_args(node, "clocks", "#clock-cells", 0,
+ index > 0, &args);
+
+ return clk_get_by_index_tail(ret, node, &args, "clocks",
+ index > 0, clk);
}
int clk_get_bulk(struct udevice *dev, struct clk_bulk *bulk)
return ops->get_rate(clk);
}
+struct clk *clk_get_parent(struct clk *clk)
+{
+ struct udevice *pdev;
+ struct clk *pclk;
+
+ debug("%s(clk=%p)\n", __func__, clk);
+
+ pdev = dev_get_parent(clk->dev);
+ pclk = dev_get_clk_ptr(pdev);
+ if (!pclk)
+ return ERR_PTR(-ENODEV);
+
+ return pclk;
+}
+
+long long clk_get_parent_rate(struct clk *clk)
+{
+ const struct clk_ops *ops;
+ struct clk *pclk;
+
+ debug("%s(clk=%p)\n", __func__, clk);
+
+ pclk = clk_get_parent(clk);
+ if (IS_ERR(pclk))
+ return -ENODEV;
+
+ ops = clk_dev_ops(pclk->dev);
+ if (!ops->get_rate)
+ return -ENOSYS;
+
+ /* Read the 'rate' if not already set */
+ if (!pclk->rate)
+ pclk->rate = clk_get_rate(pclk);
+
+ return pclk->rate;
+}
+
ulong clk_set_rate(struct clk *clk, ulong rate)
{
const struct clk_ops *ops = clk_dev_ops(clk->dev);