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phy: Update PHY power control sequence

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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>
Reviewed-by: Manu Gautam <mgautam@codeaurora.org>
Reviewed-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Reviewed-by: Evan Green <evgreen@chromium.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Can Guo 2018-09-20 21:27:54 -07:00 committed by Kishon Vijay Abraham I
parent 63bd0f1922
commit 0d58280cf1
1 changed files with 12 additions and 7 deletions
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19
drivers/phy/qualcomm/phy-qcom-qmp.c
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@ -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);