Hi,
On Friday 13 December 2013 07:32 PM, Kamil Debski wrote:
> Previously the of_phy_get function took a struct device * and
> was declared static. It was impossible to call it from
> another driver and thus it was impossible to get phy defined
> for a given node. The old function was renamed to _of_phy_get
> and was left for internal use. of_phy_get function was added
> and it was exported. The function enables to get a phy for
> a given device tree node.
>
> Signed-off-by: Kamil Debski <k.debski@xxxxxxxxxxx>
> ---
> It seems that my git send-email is playing up and sent the previous emails
> without from. This is a resend. Sorry for any confusion.
> ---
> drivers/phy/phy-core.c | 41 ++++++++++++++++++++++++++++++++---------
> include/linux/phy/phy.h | 1 +
> 2 files changed, 33 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
> index 03cf8fb..f0dbd42 100644
> --- a/drivers/phy/phy-core.c
> +++ b/drivers/phy/phy-core.c
> @@ -240,8 +240,8 @@ out:
> EXPORT_SYMBOL_GPL(phy_power_off);
>
> /**
> - * of_phy_get() - lookup and obtain a reference to a phy by phandle
> - * @dev: device that requests this phy
> + * _of_phy_get() - lookup and obtain a reference to a phy by phandle
> + * @np: device_node for which to get the phy
> * @index: the index of the phy
> *
> * Returns the phy associated with the given phandle value,
> @@ -250,20 +250,17 @@ EXPORT_SYMBOL_GPL(phy_power_off);
> * not yet loaded. This function uses of_xlate call back function provided
> * while registering the phy_provider to find the phy instance.
> */
> -static struct phy *of_phy_get(struct device *dev, int index)
> +static struct phy *_of_phy_get(struct device_node *np, int index)
> {
> int ret;
> struct phy_provider *phy_provider;
> struct phy *phy = NULL;
> struct of_phandle_args args;
>
> - ret = of_parse_phandle_with_args(dev->of_node, "phys", "#phy-cells",
> + ret = of_parse_phandle_with_args(np, "phys", "#phy-cells",
> index, &args);
> - if (ret) {
> - dev_dbg(dev, "failed to get phy in %s node\n",
> - dev->of_node->full_name);
> + if (ret)
> return ERR_PTR(-ENODEV);
> - }
>
> mutex_lock(&phy_provider_mutex);
> phy_provider = of_phy_provider_lookup(args.np);
> @@ -283,6 +280,32 @@ err0:
> }
>
> /**
> + * of_phy_get() - lookup and obtain a reference to a phy using a device_node.
> + * @np: device_node for which to get the phy
> + * @index: the index of the phy
Would be better if the user can get the PHY by string instead of index.
> + *
> + * Returns the phy driver, after getting a refcount to it; or
> + * -ENODEV if there is no such phy. The caller is responsible for
> + * calling phy_put() to release that count.
> + */
> +struct phy *of_phy_get(struct device_node *np, int index)
> +{
> + struct phy *phy = NULL;
> +
> + phy = _of_phy_get(np, index);
> + if (IS_ERR(phy))
dev_err here?
Thanks
Kishon
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