#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)
{
else
clk->id = 0;
+ clk->data = 0;
+
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)
ret = clk_set_rate(&clk, rates[index]);
if (ret < 0) {
- debug("%s: failed to set rate on clock %d for %s\n",
- __func__, index, dev_read_name(dev));
+ debug("%s: failed to set rate on clock index %d (%ld) for %s\n",
+ __func__, index, clk.id, dev_read_name(dev));
break;
}
}
{
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;
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 or if proper flag set*/
+ if (!pclk->rate || pclk->flags & CLK_GET_RATE_NOCACHE)
+ 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);
return 0;
}
+int clk_get_by_id(ulong id, struct clk **clkp)
+{
+ struct udevice *dev;
+ struct uclass *uc;
+ int ret;
+
+ ret = uclass_get(UCLASS_CLK, &uc);
+ if (ret)
+ return ret;
+
+ uclass_foreach_dev(dev, uc) {
+ struct clk *clk = dev_get_clk_ptr(dev);
+
+ if (clk && clk->id == id) {
+ *clkp = clk;
+ return 0;
+ }
+ }
+
+ 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;
+
+ /* same device, id and data */
+ if (p->dev == q->dev && p->id == q->id && p->data == q->data)
+ return true;
+
+ return false;
+}
+
UCLASS_DRIVER(clk) = {
.id = UCLASS_CLK,
.name = "clk",
projects / oweals / u-boot.git / blobdiff