From patchwork Sat Oct 29 20:22:11 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Gautam X-Patchwork-Id: 9404135 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 0DA6B6022E for ; Sat, 29 Oct 2016 20:23:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 00FB228E66 for ; Sat, 29 Oct 2016 20:23:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EA0672914F; Sat, 29 Oct 2016 20:23:10 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6A09529155 for ; Sat, 29 Oct 2016 20:23:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755549AbcJ2UXJ (ORCPT ); Sat, 29 Oct 2016 16:23:09 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:46916 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753507AbcJ2UXI (ORCPT ); Sat, 29 Oct 2016 16:23:08 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 46E11616FB; Sat, 29 Oct 2016 20:23:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1477772587; bh=o/n8zxM5Zc8ZBgTVm13Qy+1MzVf1YmU9Mh3926vWleU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f63UhWgzLrcAwK5QKmtKuwiZPw4K8cJhPRJIItdGW9V8mFwZpq11El9MSNnM66sSg xiM78vllrG70Nqj2ATcE3VtSnwitQjN86EYBMovX1zeDClLikoUO0U9PgQ/m57TOLZ N7Pxu0f79igsdH16j0/s4M8qsOcIWlNKKL2Woedc= Received: from blr-ubuntu-41.ap.qualcomm.com (unknown [202.46.23.61]) (using TLSv1.1 with cipher ECDHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: vivek.gautam@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 267316170F; Sat, 29 Oct 2016 20:23:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1477772585; bh=o/n8zxM5Zc8ZBgTVm13Qy+1MzVf1YmU9Mh3926vWleU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Za1/DNeTuPwvubcjf974TM+q4fIGdcXqct6jQSWB/Q3F4We8jqZsyHcw0xLPGp2nX JKiYEoL22NC2hnXzDjUq+/lWoDqAqWiK6LkSb/kN7FBJ1oeICW4e3bx8IXz+Nd+QQA wED9g4LzVGZ5GAYWbtdUQ6nqlc74kPiNlnEkyYEg= DMARC-Filter: OpenDMARC Filter v1.3.1 smtp.codeaurora.org 267316170F Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=pass smtp.mailfrom=vivek.gautam@codeaurora.org From: Vivek Gautam To: kishon@ti.com, jejb@linux.vnet.ibm.com, vinholikatti@gmail.com, martin.petersen@oracle.com Cc: sboyd@codeaurora.org, subhashj@codeaurora.org, ygardi@codeaurora.org, linux-scsi@vger.kernel.org, linux-arm-msm@vger.kernel.org, Vivek Gautam Subject: [PATCH v3 09/12] ufs-qcom: phy/hcd: Refactoring phy clock handling Date: Sun, 30 Oct 2016 01:52:11 +0530 Message-Id: <1477772534-14170-10-git-send-email-vivek.gautam@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1477772534-14170-1-git-send-email-vivek.gautam@codeaurora.org> References: <1477772534-14170-1-git-send-email-vivek.gautam@codeaurora.org> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add phy clock enable code to phy_power_on/off callbacks, and remove explicit calls to enable these phy clocks from the ufs-qcom hcd driver. Signed-off-by: Vivek Gautam --- Changes since v2: - Added phy_power_on() and phy_power_off() calls to power-cycle the PHY during aggressive clk gating. Changes since v1: - staticized ufs_qcom_phy_enable(/disable)_ref_clk(), - staticized ufs_qcom_phy_enable(/disable)_iface_clk() - removed function declaration and export symbol for these APIs. drivers/phy/phy-qcom-ufs.c | 36 ++++++++++++++++++------------------ drivers/scsi/ufs/ufs-qcom.c | 18 +++--------------- include/linux/phy/phy-qcom-ufs.h | 18 ------------------ 3 files changed, 21 insertions(+), 51 deletions(-) diff --git a/drivers/phy/phy-qcom-ufs.c b/drivers/phy/phy-qcom-ufs.c index 1ec64d5..9dff4c2 100644 --- a/drivers/phy/phy-qcom-ufs.c +++ b/drivers/phy/phy-qcom-ufs.c @@ -366,10 +366,9 @@ int ufs_qcom_phy_enable_vreg(struct device *dev, return ret; } -int ufs_qcom_phy_enable_ref_clk(struct phy *generic_phy) +static int ufs_qcom_phy_enable_ref_clk(struct ufs_qcom_phy *phy) { int ret = 0; - struct ufs_qcom_phy *phy = get_ufs_qcom_phy(generic_phy); if (phy->is_ref_clk_enabled) goto out; @@ -416,7 +415,6 @@ int ufs_qcom_phy_enable_ref_clk(struct phy *generic_phy) out: return ret; } -EXPORT_SYMBOL_GPL(ufs_qcom_phy_enable_ref_clk); static int ufs_qcom_phy_disable_vreg(struct device *dev, @@ -441,10 +439,8 @@ int ufs_qcom_phy_disable_vreg(struct device *dev, return ret; } -void ufs_qcom_phy_disable_ref_clk(struct phy *generic_phy) +static void ufs_qcom_phy_disable_ref_clk(struct ufs_qcom_phy *phy) { - struct ufs_qcom_phy *phy = get_ufs_qcom_phy(generic_phy); - if (phy->is_ref_clk_enabled) { clk_disable_unprepare(phy->ref_clk); /* @@ -457,7 +453,6 @@ void ufs_qcom_phy_disable_ref_clk(struct phy *generic_phy) phy->is_ref_clk_enabled = false; } } -EXPORT_SYMBOL_GPL(ufs_qcom_phy_disable_ref_clk); #define UFS_REF_CLK_EN (1 << 5) @@ -510,9 +505,8 @@ void ufs_qcom_phy_disable_dev_ref_clk(struct phy *generic_phy) EXPORT_SYMBOL_GPL(ufs_qcom_phy_disable_dev_ref_clk); /* Turn ON M-PHY RMMI interface clocks */ -int ufs_qcom_phy_enable_iface_clk(struct phy *generic_phy) +static int ufs_qcom_phy_enable_iface_clk(struct ufs_qcom_phy *phy) { - struct ufs_qcom_phy *phy = get_ufs_qcom_phy(generic_phy); int ret = 0; if (phy->is_iface_clk_enabled) @@ -536,20 +530,16 @@ int ufs_qcom_phy_enable_iface_clk(struct phy *generic_phy) out: return ret; } -EXPORT_SYMBOL_GPL(ufs_qcom_phy_enable_iface_clk); /* Turn OFF M-PHY RMMI interface clocks */ -void ufs_qcom_phy_disable_iface_clk(struct phy *generic_phy) +void ufs_qcom_phy_disable_iface_clk(struct ufs_qcom_phy *phy) { - struct ufs_qcom_phy *phy = get_ufs_qcom_phy(generic_phy); - if (phy->is_iface_clk_enabled) { clk_disable_unprepare(phy->tx_iface_clk); clk_disable_unprepare(phy->rx_iface_clk); phy->is_iface_clk_enabled = false; } } -EXPORT_SYMBOL_GPL(ufs_qcom_phy_disable_iface_clk); int ufs_qcom_phy_start_serdes(struct phy *generic_phy) { @@ -667,13 +657,20 @@ int ufs_qcom_phy_power_on(struct phy *generic_phy) goto out_disable_phy; } - err = ufs_qcom_phy_enable_ref_clk(generic_phy); + err = ufs_qcom_phy_enable_iface_clk(phy_common); if (err) { - dev_err(dev, "%s enable phy ref clock failed, err=%d\n", + dev_err(dev, "%s enable phy iface clock failed, err=%d\n", __func__, err); goto out_disable_pll; } + err = ufs_qcom_phy_enable_ref_clk(phy_common); + if (err) { + dev_err(dev, "%s enable phy ref clock failed, err=%d\n", + __func__, err); + goto out_disable_iface_clk; + } + /* enable device PHY ref_clk pad rail */ if (phy_common->vddp_ref_clk.reg) { err = ufs_qcom_phy_enable_vreg(dev, @@ -689,7 +686,9 @@ int ufs_qcom_phy_power_on(struct phy *generic_phy) goto out; out_disable_ref_clk: - ufs_qcom_phy_disable_ref_clk(generic_phy); + ufs_qcom_phy_disable_ref_clk(phy_common); +out_disable_iface_clk: + ufs_qcom_phy_disable_iface_clk(phy_common); out_disable_pll: ufs_qcom_phy_disable_vreg(dev, &phy_common->vdda_pll); out_disable_phy: @@ -708,7 +707,8 @@ int ufs_qcom_phy_power_off(struct phy *generic_phy) if (phy_common->vddp_ref_clk.reg) ufs_qcom_phy_disable_vreg(phy_common->dev, &phy_common->vddp_ref_clk); - ufs_qcom_phy_disable_ref_clk(generic_phy); + ufs_qcom_phy_disable_ref_clk(phy_common); + ufs_qcom_phy_disable_iface_clk(phy_common); ufs_qcom_phy_disable_vreg(phy_common->dev, &phy_common->vdda_pll); ufs_qcom_phy_disable_vreg(phy_common->dev, &phy_common->vdda_phy); diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index 3aedf73..9b6a081 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -1112,17 +1112,7 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on) return 0; if (on) { - err = ufs_qcom_phy_enable_iface_clk(host->generic_phy); - if (err) - goto out; - - err = ufs_qcom_phy_enable_ref_clk(host->generic_phy); - if (err) { - dev_err(hba->dev, "%s enable phy ref clock failed, err=%d\n", - __func__, err); - ufs_qcom_phy_disable_iface_clk(host->generic_phy); - goto out; - } + phy_power_on(host->generic_phy); /* enable the device ref clock for HS mode*/ if (ufshcd_is_hs_mode(&hba->pwr_info)) ufs_qcom_dev_ref_clk_ctrl(host, true); @@ -1131,9 +1121,8 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on) ufs_qcom_update_bus_bw_vote(host); } else { - - /* M-PHY RMMI interface clocks can be turned off */ - ufs_qcom_phy_disable_iface_clk(host->generic_phy); + /* powering off PHY during aggressive clk gating */ + phy_power_off(host->generic_phy); if (!ufs_qcom_is_link_active(hba)) /* disable device ref_clk */ ufs_qcom_dev_ref_clk_ctrl(host, false); @@ -1146,7 +1135,6 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on) dev_err(hba->dev, "%s: set bus vote failed %d\n", __func__, err); -out: return err; } diff --git a/include/linux/phy/phy-qcom-ufs.h b/include/linux/phy/phy-qcom-ufs.h index 9d18e9f..35c070e 100644 --- a/include/linux/phy/phy-qcom-ufs.h +++ b/include/linux/phy/phy-qcom-ufs.h @@ -18,22 +18,6 @@ #include "phy.h" /** - * ufs_qcom_phy_enable_ref_clk() - Enable the phy - * ref clock. - * @phy: reference to a generic phy - * - * returns 0 for success, and non-zero for error. - */ -int ufs_qcom_phy_enable_ref_clk(struct phy *phy); - -/** - * ufs_qcom_phy_disable_ref_clk() - Disable the phy - * ref clock. - * @phy: reference to a generic phy. - */ -void ufs_qcom_phy_disable_ref_clk(struct phy *phy); - -/** * ufs_qcom_phy_enable_dev_ref_clk() - Enable the device * ref clock. * @phy: reference to a generic phy. @@ -47,8 +31,6 @@ */ void ufs_qcom_phy_disable_dev_ref_clk(struct phy *phy); -int ufs_qcom_phy_enable_iface_clk(struct phy *phy); -void ufs_qcom_phy_disable_iface_clk(struct phy *phy); int ufs_qcom_phy_start_serdes(struct phy *phy); int ufs_qcom_phy_set_tx_lane_enable(struct phy *phy, u32 tx_lanes); int ufs_qcom_phy_calibrate_phy(struct phy *phy, bool is_rate_B);