From 850557842f01ecb47b00ecb43b3bc3c8f1bb826f Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Thu, 29 Sep 2016 11:41:14 +0200 Subject: phy: Introduce of_phy_get_by_phandle Currently generic phy support assumes that the standard phy binding from dts/Bindings/phy/phy-bindings.txt is used. This adds a helper function which can be used to retrieve a phy when this standard binding is not used. Signed-off-by: Sascha Hauer --- drivers/phy/phy-core.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) (limited to 'drivers/phy') diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c index 67af14f680..7c1f3d440b 100644 --- a/drivers/phy/phy-core.c +++ b/drivers/phy/phy-core.c @@ -267,6 +267,42 @@ struct phy *of_phy_get(struct device_node *np, const char *con_id) return _of_phy_get(np, index); } +/** + * of_phy_get_by_phandle() - lookup and obtain a reference to a phy. + * @dev: device that requests this phy + * @phandle - name of the property holding the phy phandle value + * @index - the index of the phy + * + * 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_by_phandle(struct device_d *dev, const char *phandle, + u8 index) +{ + struct device_node *np; + struct phy_provider *phy_provider; + + if (!dev->device_node) { + dev_dbg(dev, "device does not have a device node entry\n"); + return ERR_PTR(-EINVAL); + } + + np = of_parse_phandle(dev->device_node, phandle, index); + if (!np) { + dev_dbg(dev, "failed to get %s phandle in %s node\n", phandle, + dev->device_node->full_name); + return ERR_PTR(-ENODEV); + } + + phy_provider = of_phy_provider_lookup(np); + if (IS_ERR(phy_provider)) { + return ERR_PTR(-ENODEV); + } + + return phy_provider->of_xlate(phy_provider->dev, NULL); +} + /** * phy_get() - lookup and obtain a reference to a phy. * @dev: device that requests this phy -- cgit v1.2.3