Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754697AbaDRTFY (ORCPT ); Fri, 18 Apr 2014 15:05:24 -0400 Received: from denmail01-v4020.amcc.com ([192.195.68.30]:59609 "EHLO denmail01.apm.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1754470AbaDRTEe (ORCPT ); Fri, 18 Apr 2014 15:04:34 -0400 From: Suman Tripathi To: kishon@ti.com, tj@kernel.org Cc: olof@lixom.net, arnd@arndb.de, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, linux-ide@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, ddutile@redhat.com, jcm@redhat.com, patches@apm.com, Suman Tripathi , Loc Ho Subject: [PATCH 1/2] PHY: Add function set_rate to generic PHY framework Date: Fri, 18 Apr 2014 23:33:16 +0530 Message-Id: <1397844197-13356-2-git-send-email-stripathi@apm.com> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1397844197-13356-1-git-send-email-stripathi@apm.com> References: <1397844197-13356-1-git-send-email-stripathi@apm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds function set_rate to the generic PHY framework operation structure. This function can be called to instruct the PHY underlying layer at specified lane to configure for specified rate. Signed-off-by: Loc Ho Signed-off-by: Suman Tripathi --- drivers/phy/phy-core.c | 27 +++++++++++++++++++++++++++ include/linux/phy/phy.h | 8 ++++++++ 2 files changed, 35 insertions(+) diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c index 645c867..51f82e0 100644 --- a/drivers/phy/phy-core.c +++ b/drivers/phy/phy-core.c @@ -258,6 +258,33 @@ int phy_power_off(struct phy *phy) EXPORT_SYMBOL_GPL(phy_power_off); /** + * phy_set_rate - set an specified lane at an specified rate + * @phy: phy instance to be set + * @lane: zero-based lane index + * @rate: operating rate in bps (bits per second) + * + * Returns 0 if successful, -ENOTSUPP if not supported + * -EINVAL if parameter out of range. + */ +int phy_set_rate(struct phy *phy, int lane, u64 rate) +{ + int ret = 0; + + mutex_lock(&phy->mutex); + if (phy->ops->set_rate) { + ret = phy->ops->set_rate(phy, lane, rate); + if (ret < 0) { + dev_err(&phy->dev, "phy set rate failed --> %d\n", + ret); + } + } + mutex_unlock(&phy->mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(phy_set_rate); + +/** * of_phy_get() - lookup and obtain a reference to a phy by phandle * @dev: device that requests this phy * @index: the index of the phy diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h index e273e5a..2dfcb34 100644 --- a/include/linux/phy/phy.h +++ b/include/linux/phy/phy.h @@ -27,6 +27,7 @@ struct phy; * @exit: operation to be performed while exiting * @power_on: powering on the phy * @power_off: powering off the phy + * @set_rate: set the rate * @owner: the module owner containing the ops */ struct phy_ops { @@ -34,6 +35,7 @@ struct phy_ops { int (*exit)(struct phy *phy); int (*power_on)(struct phy *phy); int (*power_off)(struct phy *phy); + int (*set_rate)(struct phy *phy, int lane, u64 rate); struct module *owner; }; @@ -137,6 +139,7 @@ int phy_init(struct phy *phy); int phy_exit(struct phy *phy); int phy_power_on(struct phy *phy); int phy_power_off(struct phy *phy); +int phy_set_rate(struct phy *phy, int lane, u64 rate); static inline int phy_get_bus_width(struct phy *phy) { return phy->attrs.bus_width; @@ -217,6 +220,11 @@ static inline int phy_power_off(struct phy *phy) return -ENOSYS; } +static inline int phy_set_rate(struct phy *phy, int lane, u64 rate) +{ + return -ENOSYS; +} + static inline int phy_get_bus_width(struct phy *phy) { return -ENOSYS; -- 1.8.2.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/