diff options
| -rw-r--r-- | drivers/clk/clk-uclass.c | 61 | ||||
| -rw-r--r-- | include/clk.h | 15 |
2 files changed, 75 insertions, 1 deletions
diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c index 844b87cc33..d9236c5b51 100644 --- a/drivers/clk/clk-uclass.c +++ b/drivers/clk/clk-uclass.c @@ -54,6 +54,46 @@ static int clk_of_xlate_default(struct clk *clk, return 0; } +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) +{ + struct udevice *dev_clk; + const struct clk_ops *ops; + + assert(clk); + clk->dev = NULL; + if (ret) + goto err; + + 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); + return ret; + } + + clk->dev = dev_clk; + + ops = clk_dev_ops(dev_clk); + + if (ops->of_xlate) + ret = ops->of_xlate(clk, args); + else + 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) { @@ -100,7 +140,26 @@ static int clk_get_by_indexed_prop(struct udevice *dev, const char *prop_name, 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) diff --git a/include/clk.h b/include/clk.h index 8e366163f9..d24e99713a 100644 --- a/include/clk.h +++ b/include/clk.h @@ -8,6 +8,7 @@ #ifndef _CLK_H_ #define _CLK_H_ +#include <dm/ofnode.h> #include <linux/errno.h> #include <linux/types.h> @@ -101,6 +102,20 @@ int clk_get_by_index_platdata(struct udevice *dev, int index, int clk_get_by_index(struct udevice *dev, int index, struct clk *clk); /** + * clock_get_by_index_nodev - Get/request a clock by integer index + * without a device. + * + * This is a version of clk_get_by_index() that does not use a device. + * + * @node: The client ofnode. + * @index: The index of the clock to request, within the client's list of + * clocks. + * @clock A pointer to a clock struct to initialize. + * @return 0 if OK, or a negative error code. + */ +int clk_get_by_index_nodev(ofnode node, int index, struct clk *clk); + +/** * clock_get_bulk - Get/request all clocks of a device. * * This looks up and requests all clocks of the client device; each device is |