From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752536AbaA2RaA (ORCPT ); Wed, 29 Jan 2014 12:30:00 -0500 Received: from mailout3.samsung.com ([203.254.224.33]:54945 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752278AbaA2R3z (ORCPT ); Wed, 29 Jan 2014 12:29:55 -0500 X-AuditID: cbfee61a-b7fb26d00000724f-92-52e93a92271c From: Kamil Debski To: linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-usb@vger.kernel.org, devicetree@vger.kernel.org Cc: kyungmin.park@samsung.com, kishon@ti.com, t.figa@samsung.com, s.nawrocki@samsung.com, m.szyprowski@samsung.com, gautam.vivek@samsung.com, mat.krawczuk@gmail.com, yulgon.kim@samsung.com, p.paneri@samsung.com, av.tikhomirov@samsung.com, jg1.han@samsung.com, galak@codeaurora.org, matt.porter@linaro.org, k.debski@samsung.com, tjakobi@math.uni-bielefeld.de, stern@rowland.harvard.edu Subject: [PATCH v6 1/8] phy: core: Add an exported of_phy_get function Date: Wed, 29 Jan 2014 18:29:27 +0100 Message-id: <1391016574-25237-2-git-send-email-k.debski@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1391016574-25237-1-git-send-email-k.debski@samsung.com> References: <1391016574-25237-1-git-send-email-k.debski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrPLMWRmVeSWpSXmKPExsVy+t9jAd1JVi+DDKZ2CFgs2X2D1WL+kXOs Fv1vFrJatF05yG5xeeElVosfry+wWVx42sNmcbbpDVBs1xw2ixnn9zFZLFrWymyx9shddouz /bfZLCY2TWO3OL+lk8ni8Jt2VosJv4Ha1s94zWLRtvoDq0XH2YPsDiIel/t6mTx2zrrL7nHn 2h42j3/H2D1m3/3B6NG3ZRWjx/Eb25k8Pm+SC+CI4rJJSc3JLEst0rdL4MqYedCqYJ9iReeb XWwNjFOluxg5OCQETCR+zrXpYuQEMsUkLtxbz9bFyMUhJLCIUaLtxGVWkISQQAeTxLNJCSD1 bAKaEqvueYCERQRqJKbcusIOUs8s0MUsMWHbaTaQhLCAm8TLRT9ZQGwWAVWJqR9amEFsXgEX ifaP25gg9ipIzJkEtpdTwFWiY8ZFNohVLhKre9awTWDkXcDIsIpRNLUguaA4KT3XUK84Mbe4 NC9dLzk/dxMjONifSe1gXNlgcYhRgINRiYd3xcXnQUKsiWXFlbmHGCU4mJVEeKMMXwYJ8aYk VlalFuXHF5XmpBYfYpTmYFES5z3Qah0oJJCeWJKanZpakFoEk2Xi4JRqYJTr9FvVzb8h9uSy Wf5fuT9ZND6c1W51d+Pudf8fFbAHak9ieLrM1jRBVOb67Dg2j3W8gdcSLvZ5S+kVcAs5P/g9 JcKdQUHCZ8tC/lOcv6YtvCkdvzogUH7bxfUbky+wHXt8Jl8w/ITqIzHnhtM6a22ueIhs7tpz IiV5s+/R2XzKDe/ruPYEvldiKc5INNRiLipOBACpuTi0cgIAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- drivers/phy/phy-core.c | 45 ++++++++++++++++++++++++++++++++++++--------- include/linux/phy/phy.h | 6 ++++++ 2 files changed, 42 insertions(+), 9 deletions(-) diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c index 645c867..a1d4387 100644 --- a/drivers/phy/phy-core.c +++ b/drivers/phy/phy-core.c @@ -258,8 +258,8 @@ int phy_power_off(struct phy *phy) 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, @@ -268,20 +268,17 @@ 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); @@ -301,6 +298,36 @@ 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 + * @con_id: name of the phy from device's point of view + * + * 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, const char *con_id) +{ + struct phy *phy = NULL; + int index = 0; + + if (con_id) + index = of_property_match_string(np, "phy-names", con_id); + + phy = _of_phy_get(np, index); + if (IS_ERR(phy)) + return phy; + + if (!try_module_get(phy->ops->owner)) + return ERR_PTR(-EPROBE_DEFER); + + get_device(&phy->dev); + + return phy; +} +EXPORT_SYMBOL_GPL(of_phy_get); + +/** * phy_put() - release the PHY * @phy: the phy returned by phy_get() * @@ -388,7 +415,7 @@ struct phy *phy_get(struct device *dev, const char *string) if (dev->of_node) { index = of_property_match_string(dev->of_node, "phy-names", string); - phy = of_phy_get(dev, index); + phy = _of_phy_get(dev->of_node, index); if (IS_ERR(phy)) { dev_err(dev, "unable to find phy\n"); return phy; diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h index e273e5a..5cffc69 100644 --- a/include/linux/phy/phy.h +++ b/include/linux/phy/phy.h @@ -149,6 +149,7 @@ struct phy *phy_get(struct device *dev, const char *string); struct phy *devm_phy_get(struct device *dev, const char *string); void phy_put(struct phy *phy); void devm_phy_put(struct device *dev, struct phy *phy); +struct phy *of_phy_get(struct device_node *np, const char *con_id); struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args *args); struct phy *phy_create(struct device *dev, const struct phy_ops *ops, @@ -245,6 +246,11 @@ static inline void devm_phy_put(struct device *dev, struct phy *phy) { } +struct phy *of_phy_get(struct device_node *np, const char *con_id) +{ + return ERR_PTR(-ENOSYS); +} + static inline struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args *args) { -- 1.7.9.5