From: Vivek Gautam <vivek.gautam@codeaurora.org>
To: Can Guo <cang@codeaurora.org>
Cc: Subhash Jadavani <subhashj@codeaurora.org>,
asutoshd@codeaurora.org, Manu Gautam <mgautam@codeaurora.org>,
kishon <kishon@ti.com>, "robh+dt" <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
open list <linux-kernel@vger.kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
linux-arm-msm <linux-arm-msm@vger.kernel.org>
Subject: Re: [PATCH v7 1/4] phy: Update PHY power control sequence
Date: Mon, 2 Jul 2018 22:30:19 +0530 [thread overview]
Message-ID: <CAFp+6iHxu2GYAn8ftDuHfE1Hj=aQvd6Rum9zjEe-G1WHsAkZuw@mail.gmail.com> (raw)
In-Reply-To: <20180619083647.10116-2-cang@codeaurora.org>
On Tue, Jun 19, 2018 at 2:06 PM, Can Guo <cang@codeaurora.org> wrote:
> All PHYs should be powered on before register configuration starts. And
> only PCIe PHYs need an extra power control before deasserts reset state.
>
> Signed-off-by: Can Guo <cang@codeaurora.org>
> ---
> drivers/phy/qualcomm/phy-qcom-qmp.c | 19 ++++++++++++-------
> 1 file changed, 12 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
> index 97ef942..ccb8578 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qmp.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
> @@ -935,10 +935,12 @@ static void qcom_qmp_phy_configure(void __iomem *base,
> }
> }
>
> -static int qcom_qmp_phy_com_init(struct qcom_qmp *qmp)
> +static int qcom_qmp_phy_com_init(struct qmp_phy *qphy)
> {
> + struct qcom_qmp *qmp = qphy->qmp;
> const struct qmp_phy_cfg *cfg = qmp->cfg;
> void __iomem *serdes = qmp->serdes;
> + void __iomem *pcs = qphy->pcs;
> void __iomem *dp_com = qmp->dp_com;
> int ret, i;
>
> @@ -979,10 +981,6 @@ static int qcom_qmp_phy_com_init(struct qcom_qmp *qmp)
> goto err_rst;
> }
>
> - if (cfg->has_phy_com_ctrl)
> - qphy_setbits(serdes, cfg->regs[QPHY_COM_POWER_DOWN_CONTROL],
> - SW_PWRDN);
> -
> if (cfg->has_phy_dp_com_ctrl) {
> qphy_setbits(dp_com, QPHY_V3_DP_COM_POWER_DOWN_CTRL,
> SW_PWRDN);
> @@ -1000,6 +998,12 @@ static int qcom_qmp_phy_com_init(struct qcom_qmp *qmp)
> SW_USB3PHY_RESET_MUX | SW_USB3PHY_RESET);
> }
>
> + if (cfg->has_phy_com_ctrl)
> + qphy_setbits(serdes, cfg->regs[QPHY_COM_POWER_DOWN_CONTROL],
> + SW_PWRDN);
> + else
> + qphy_setbits(pcs, QPHY_POWER_DOWN_CONTROL, cfg->pwrdn_ctrl);
> +
> /* Serdes configuration */
> qcom_qmp_phy_configure(serdes, cfg->regs, cfg->serdes_tbl,
> cfg->serdes_tbl_num);
> @@ -1090,7 +1094,7 @@ static int qcom_qmp_phy_init(struct phy *phy)
>
> dev_vdbg(qmp->dev, "Initializing QMP phy\n");
>
> - ret = qcom_qmp_phy_com_init(qmp);
> + ret = qcom_qmp_phy_com_init(qphy);
> if (ret)
> return ret;
>
> @@ -1127,7 +1131,8 @@ static int qcom_qmp_phy_init(struct phy *phy)
> * Pull out PHY from POWER DOWN state.
> * This is active low enable signal to power-down PHY.
> */
> - qphy_setbits(pcs, QPHY_POWER_DOWN_CONTROL, cfg->pwrdn_ctrl);
> + if(cfg->type == PHY_TYPE_PCIE)
> + qphy_setbits(pcs, QPHY_POWER_DOWN_CONTROL, cfg->pwrdn_ctrl);
>
> if (cfg->has_pwrdn_delay)
> usleep_range(cfg->pwrdn_delay_min, cfg->pwrdn_delay_max);
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
Looks good.
Reviewed-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Best regards
Vivek
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
next prev parent reply other threads:[~2018-07-02 17:00 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-19 8:36 [PATCH v7 0/4] Support for Qualcomm UFS QMP PHY on SDM845 Can Guo
2018-06-19 8:36 ` [PATCH v7 1/4] phy: Update PHY power control sequence Can Guo
2018-06-28 3:49 ` Manu Gautam
2018-07-02 17:00 ` Vivek Gautam [this message]
2018-07-25 20:26 ` Evan Green
2018-06-19 8:36 ` [PATCH v7 2/4] phy: General struct and field cleanup Can Guo
2018-06-27 20:17 ` Evan Green
2018-06-28 3:48 ` Manu Gautam
2018-07-02 6:42 ` Vivek Gautam
2018-06-19 8:36 ` [PATCH v7 3/4] phy: Add QMP phy based UFS phy support for sdm845 Can Guo
2018-06-27 20:17 ` Evan Green
2018-07-06 8:01 ` cang
2018-06-28 3:46 ` Manu Gautam
2018-06-19 8:36 ` [PATCH v7 4/4] dt-bindings: phy-qcom-qmp: Add UFS phy compatible string " Can Guo
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