lkml.org 
[lkml]   [2017]   [Nov]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 03/16] phy: qcom-qmp: Power-on PHY before initialization
Date
PHY must be powered on before turning ON clocks and
attempting to initialize it. Driver is exposing
separate init and power_on routines for this.
Apparently USB dwc3 core driver performs power-on after
init. Also, poweron and init for QMP PHY need to be
executed together always, hence remove poweron callback
from phy_ops and explicitly perform this from com_init,
similar changes needed for poweroff. On similar lines move
clk_enable from init to com_init which can be called once
for multi lane PHYs.

Signed-off-by: Manu Gautam <mgautam@codeaurora.org>
---
drivers/phy/qualcomm/phy-qcom-qmp.c | 61 +++++++++++++------------------------
1 file changed, 21 insertions(+), 40 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
index 90794dd..2f427e3 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
@@ -720,33 +720,6 @@ static void qcom_qmp_phy_configure(void __iomem *base,
}
}

-static int qcom_qmp_phy_poweron(struct phy *phy)
-{
- struct qmp_phy *qphy = phy_get_drvdata(phy);
- struct qcom_qmp *qmp = qphy->qmp;
- int num = qmp->cfg->num_vregs;
- int ret;
-
- dev_vdbg(&phy->dev, "Powering on QMP phy\n");
-
- /* turn on regulator supplies */
- ret = regulator_bulk_enable(num, qmp->vregs);
- if (ret)
- dev_err(qmp->dev, "failed to enable regulators, err=%d\n", ret);
-
- return ret;
-}
-
-static int qcom_qmp_phy_poweroff(struct phy *phy)
-{
- struct qmp_phy *qphy = phy_get_drvdata(phy);
- struct qcom_qmp *qmp = qphy->qmp;
-
- regulator_bulk_disable(qmp->cfg->num_vregs, qmp->vregs);
-
- return 0;
-}
-
static int qcom_qmp_phy_com_init(struct qcom_qmp *qmp)
{
const struct qmp_phy_cfg *cfg = qmp->cfg;
@@ -759,6 +732,19 @@ static int qcom_qmp_phy_com_init(struct qcom_qmp *qmp)
return 0;
}

+ /* turn on regulator supplies */
+ ret = regulator_bulk_enable(cfg->num_vregs, qmp->vregs);
+ if (ret) {
+ mutex_unlock(&qmp->phy_mutex);
+ return ret;
+ }
+
+ ret = clk_bulk_prepare_enable(cfg->num_clks, qmp->clks);
+ if (ret) {
+ dev_err(qmp->dev, "failed to enable clks, err=%d\n", ret);
+ goto err_clk_enable;
+ }
+
for (i = 0; i < cfg->num_resets; i++) {
ret = reset_control_deassert(qmp->resets[i]);
if (ret) {
@@ -803,6 +789,9 @@ static int qcom_qmp_phy_com_init(struct qcom_qmp *qmp)
err_rst:
while (--i >= 0)
reset_control_assert(qmp->resets[i]);
+ clk_bulk_disable_unprepare(cfg->num_clks, qmp->clks);
+err_clk_enable:
+ regulator_bulk_disable(cfg->num_vregs, qmp->vregs);
mutex_unlock(&qmp->phy_mutex);

return ret;
@@ -832,6 +821,10 @@ static int qcom_qmp_phy_com_exit(struct qcom_qmp *qmp)
while (--i >= 0)
reset_control_assert(qmp->resets[i]);

+ clk_bulk_disable_unprepare(cfg->num_clks, qmp->clks);
+
+ regulator_bulk_disable(cfg->num_vregs, qmp->vregs);
+
mutex_unlock(&qmp->phy_mutex);

return 0;
@@ -852,15 +845,9 @@ static int qcom_qmp_phy_init(struct phy *phy)

dev_vdbg(qmp->dev, "Initializing QMP phy\n");

- ret = clk_bulk_prepare_enable(cfg->num_clks, qmp->clks);
- if (ret) {
- dev_err(qmp->dev, "failed to enable clks, err=%d\n", ret);
- return ret;
- }
-
ret = qcom_qmp_phy_com_init(qmp);
if (ret)
- goto err_com_init;
+ return ret;

if (cfg->has_lane_rst) {
ret = reset_control_deassert(qphy->lane_rst);
@@ -915,8 +902,6 @@ static int qcom_qmp_phy_init(struct phy *phy)
reset_control_assert(qphy->lane_rst);
err_lane_rst:
qcom_qmp_phy_com_exit(qmp);
-err_com_init:
- clk_bulk_disable_unprepare(cfg->num_clks, qmp->clks);

return ret;
}
@@ -943,8 +928,6 @@ static int qcom_qmp_phy_exit(struct phy *phy)

qcom_qmp_phy_com_exit(qmp);

- clk_bulk_disable_unprepare(cfg->num_clks, qmp->clks);
-
return 0;
}

@@ -1057,8 +1040,6 @@ static int phy_pipe_clk_register(struct qcom_qmp *qmp, struct device_node *np)
static const struct phy_ops qcom_qmp_phy_gen_ops = {
.init = qcom_qmp_phy_init,
.exit = qcom_qmp_phy_exit,
- .power_on = qcom_qmp_phy_poweron,
- .power_off = qcom_qmp_phy_poweroff,
.owner = THIS_MODULE,
};

--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
\
 
 \ /
  Last update: 2017-11-21 10:30    [W:0.033 / U:31.236 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site