Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752676AbdI0JAR (ORCPT ); Wed, 27 Sep 2017 05:00:17 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:50220 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752339AbdI0JAM (ORCPT ); Wed, 27 Sep 2017 05:00:12 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org DD6FB60C07 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=mgautam@codeaurora.org From: Manu Gautam To: Kishon Vijay Abraham I Cc: Felipe Balbi , linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org, Manu Gautam , Vivek Gautam , Yoshihiro Shimoda , Krzysztof Kozlowski , linux-kernel@vger.kernel.org (open list:GENERIC PHY FRAMEWORK) Subject: [PATCH v2 04/17] phy: qcom-qusb2: Power-on PHY before initialization Date: Wed, 27 Sep 2017 14:29:00 +0530 Message-Id: <1506502753-27408-5-git-send-email-mgautam@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1506502753-27408-1-git-send-email-mgautam@codeaurora.org> References: <1506502753-27408-1-git-send-email-mgautam@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3433 Lines: 114 PHY must be powered on before turning ON clocks and attempting to initialize it. Driver is exposing separate init and power_on routines for this. Apparently USB dwc3 core driver performs power-on after init. Also, poweron and init for QUSB2 PHY need to be executed together always, hence remove poweron callback from phy_ops and explicitly perform this from init, similar changes needed for poweroff. Signed-off-by: Manu Gautam --- drivers/phy/qualcomm/phy-qcom-qusb2.c | 47 +++++++++++------------------------ 1 file changed, 15 insertions(+), 32 deletions(-) diff --git a/drivers/phy/qualcomm/phy-qcom-qusb2.c b/drivers/phy/qualcomm/phy-qcom-qusb2.c index 6c57524..4a5b2a1 100644 --- a/drivers/phy/qualcomm/phy-qcom-qusb2.c +++ b/drivers/phy/qualcomm/phy-qcom-qusb2.c @@ -195,54 +195,31 @@ static void qusb2_phy_set_tune2_param(struct qusb2_phy *qphy) qusb2_setbits(qphy->base, QUSB2PHY_PORT_TUNE2, val[0] << 0x4); } -static int qusb2_phy_poweron(struct phy *phy) +static int qusb2_phy_init(struct phy *phy) { struct qusb2_phy *qphy = phy_get_drvdata(phy); - int num = ARRAY_SIZE(qphy->vregs); + unsigned int val; + unsigned int clk_scheme; int ret; - dev_vdbg(&phy->dev, "%s(): Powering-on QUSB2 phy\n", __func__); + dev_vdbg(&phy->dev, "%s(): Initializing QUSB2 phy\n", __func__); /* turn on regulator supplies */ - ret = regulator_bulk_enable(num, qphy->vregs); + ret = regulator_bulk_enable(ARRAY_SIZE(qphy->vregs), qphy->vregs); if (ret) return ret; ret = clk_prepare_enable(qphy->iface_clk); if (ret) { dev_err(&phy->dev, "failed to enable iface_clk, %d\n", ret); - regulator_bulk_disable(num, qphy->vregs); - return ret; + goto poweroff_phy; } - return 0; -} - -static int qusb2_phy_poweroff(struct phy *phy) -{ - struct qusb2_phy *qphy = phy_get_drvdata(phy); - - clk_disable_unprepare(qphy->iface_clk); - - regulator_bulk_disable(ARRAY_SIZE(qphy->vregs), qphy->vregs); - - return 0; -} - -static int qusb2_phy_init(struct phy *phy) -{ - struct qusb2_phy *qphy = phy_get_drvdata(phy); - unsigned int val; - unsigned int clk_scheme; - int ret; - - dev_vdbg(&phy->dev, "%s(): Initializing QUSB2 phy\n", __func__); - /* enable ahb interface clock to program phy */ ret = clk_prepare_enable(qphy->cfg_ahb_clk); if (ret) { dev_err(&phy->dev, "failed to enable cfg ahb clock, %d\n", ret); - return ret; + goto disable_iface_clk; } /* Perform phy reset */ @@ -344,6 +321,11 @@ static int qusb2_phy_init(struct phy *phy) reset_control_assert(qphy->phy_reset); disable_ahb_clk: clk_disable_unprepare(qphy->cfg_ahb_clk); +disable_iface_clk: + clk_disable_unprepare(qphy->iface_clk); +poweroff_phy: + regulator_bulk_disable(ARRAY_SIZE(qphy->vregs), qphy->vregs); + return ret; } @@ -361,6 +343,9 @@ static int qusb2_phy_exit(struct phy *phy) reset_control_assert(qphy->phy_reset); clk_disable_unprepare(qphy->cfg_ahb_clk); + clk_disable_unprepare(qphy->iface_clk); + + regulator_bulk_disable(ARRAY_SIZE(qphy->vregs), qphy->vregs); return 0; } @@ -368,8 +353,6 @@ static int qusb2_phy_exit(struct phy *phy) static const struct phy_ops qusb2_phy_gen_ops = { .init = qusb2_phy_init, .exit = qusb2_phy_exit, - .power_on = qusb2_phy_poweron, - .power_off = qusb2_phy_poweroff, .owner = THIS_MODULE, }; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project