Messages in this thread Patch in this message | | | From | Can Guo <> | Subject | [PATCH v5 1/3] phy: Power on PHY before start Serdes configuration | Date | Wed, 23 May 2018 11:47:10 +0800 |
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PHYs should be powered on before register configuration starts.
Signed-off-by: Can Guo <cang@codeaurora.org> --- drivers/phy/qualcomm/phy-qcom-qmp.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c index 97ef942..9bfdba1 100644 --- a/drivers/phy/qualcomm/phy-qcom-qmp.c +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c @@ -1000,6 +1000,12 @@ static int qcom_qmp_phy_com_init(struct qcom_qmp *qmp) SW_USB3PHY_RESET_MUX | SW_USB3PHY_RESET); } + /* + * 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); + /* Serdes configuration */ qcom_qmp_phy_configure(serdes, cfg->regs, cfg->serdes_tbl, cfg->serdes_tbl_num); -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
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