diff options
| -rw-r--r-- | drivers/clk/clk-uclass.c | 16 | ||||
| -rw-r--r-- | include/clk.h | 9 |
2 files changed, 25 insertions, 0 deletions
diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c index 79b3b0494c..4346c61eea 100644 --- a/drivers/clk/clk-uclass.c +++ b/drivers/clk/clk-uclass.c @@ -13,6 +13,7 @@ #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) { @@ -379,6 +380,21 @@ ulong clk_get_rate(struct clk *clk) 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; +} + ulong clk_set_rate(struct clk *clk, ulong rate) { const struct clk_ops *ops = clk_dev_ops(clk->dev); diff --git a/include/clk.h b/include/clk.h index b10c0013b1..e20641ee98 100644 --- a/include/clk.h +++ b/include/clk.h @@ -259,6 +259,15 @@ int clk_free(struct clk *clk); ulong clk_get_rate(struct clk *clk); /** + * clk_get_parent() - Get current clock's parent. + * + * @clk: A clock struct that was previously successfully requested by + * clk_request/get_by_*(). + * @return pointer to parent's struct clk, or error code passed as pointer + */ +struct clk *clk_get_parent(struct clk *clk); + +/** * clk_set_rate() - Set current clock rate. * * @clk: A clock struct that was previously successfully requested by |