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Subject[PATCH v6 1/3] phy: Update PHY power control sequence
Date
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 | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
index 97ef942..f779b0f 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
@@ -982,6 +982,8 @@ static int qcom_qmp_phy_com_init(struct qcom_qmp *qmp)
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);

if (cfg->has_phy_dp_com_ctrl) {
qphy_setbits(dp_com, QPHY_V3_DP_COM_POWER_DOWN_CTRL,
@@ -1127,7 +1129,8 @@ 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
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