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From:   Manu Gautam <mgautam@codeaurora.org>
To:     Kishon Vijay Abraham I <kishon@ti.com>
Cc:     linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org,
        Manu Gautam <mgautam@codeaurora.org>,
        Vivek Gautam <vivek.gautam@codeaurora.org>,
        Varadarajan Narayanan <varada@codeaurora.org>,
        Fengguang Wu <fengguang.wu@intel.com>,
        Wei Yongjun <weiyongjun1@huawei.com>,
        linux-kernel@vger.kernel.org (open list:GENERIC PHY FRAMEWORK)
Subject: [PATCH v3 06/16] phy: qcom-qmp: Move SERDES/PCS START after PHY reset
Date:   Tue, 21 Nov 2017 14:53:16 +0530
Message-Id: <1511256206-1587-7-git-send-email-mgautam@codeaurora.org>
In-Reply-To: <1511256206-1587-1-git-send-email-mgautam@codeaurora.org>
References: <1511256206-1587-1-git-send-email-mgautam@codeaurora.org>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Driver is currently performing PHY reset after starting
SERDES/PCS. As per hardware datasheet reset must be done
before starting PHY. Hence, update the sequence.

Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
index aa27757..263cf50 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
@@ -882,12 +882,12 @@ static int qcom_qmp_phy_init(struct phy *phy)
 	if (cfg->has_pwrdn_delay)
 		usleep_range(cfg->pwrdn_delay_min, cfg->pwrdn_delay_max);
 
-	/* start SerDes and Phy-Coding-Sublayer */
-	qphy_setbits(pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
-
 	/* Pull PHY out of reset state */
 	qphy_clrbits(pcs, cfg->regs[QPHY_SW_RESET], SW_RESET);
 
+	/* start SerDes and Phy-Coding-Sublayer */
+	qphy_setbits(pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
+
 	status = pcs + cfg->regs[QPHY_PCS_READY_STATUS];
 	mask = cfg->mask_pcs_ready;
 
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


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