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phy: qcom: Utilize UFS reset controller

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Move the PHY reset from ufs-qcom into the respective PHYs. This will
allow us to merge the two phases of UFS PHY initialization.

Signed-off-by: Evan Green <evgreen@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Evan Green
2019-03-21 10:17:59 -07:00
committed by Kishon Vijay Abraham I
parent 12fd5f250d
commit c9b589791f
6 changed files with 76 additions and 18 deletions
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34
drivers/phy/qualcomm/phy-qcom-qmp.c
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@@ -897,6 +897,7 @@ struct qmp_phy {
* @init_count: phy common block initialization count
* @phy_initialized: indicate if PHY has been initialized
* @mode: current PHY mode
* @ufs_reset: optional UFS PHY reset handle
*/
struct qcom_qmp {
struct device *dev;
@@ -914,6 +915,8 @@ struct qcom_qmp {
int init_count;
bool phy_initialized;
enum phy_mode mode;
struct reset_control *ufs_reset;
};
static inline void qphy_setbits(void __iomem *base, u32 offset, u32 val)
@@ -1314,6 +1317,7 @@ static int qcom_qmp_phy_com_exit(struct qcom_qmp *qmp)
return 0;
}
reset_control_assert(qmp->ufs_reset);
if (cfg->has_phy_com_ctrl) {
qphy_setbits(serdes, cfg->regs[QPHY_COM_START_CONTROL],
SERDES_START | PCS_START);
@@ -1351,6 +1355,33 @@ static int qcom_qmp_phy_init(struct phy *phy)
dev_vdbg(qmp->dev, "Initializing QMP phy\n");
if (cfg->no_pcs_sw_reset) {
/*
* Get UFS reset, which is delayed until now to avoid a
* circular dependency where UFS needs its PHY, but the PHY
* needs this UFS reset.
*/
if (!qmp->ufs_reset) {
qmp->ufs_reset =
devm_reset_control_get_exclusive(qmp->dev,
"ufsphy");
if (IS_ERR(qmp->ufs_reset)) {
ret = PTR_ERR(qmp->ufs_reset);
dev_err(qmp->dev,
"failed to get UFS reset: %d\n",
ret);
qmp->ufs_reset = NULL;
return ret;
}
}
ret = reset_control_assert(qmp->ufs_reset);
if (ret)
goto err_lane_rst;
}
ret = qcom_qmp_phy_com_init(qphy);
if (ret)
return ret;
@@ -1383,6 +1414,9 @@ static int qcom_qmp_phy_init(struct phy *phy)
cfg->rx_tbl, cfg->rx_tbl_num);
qcom_qmp_phy_configure(pcs, cfg->regs, cfg->pcs_tbl, cfg->pcs_tbl_num);
ret = reset_control_deassert(qmp->ufs_reset);
if (ret)
goto err_lane_rst;
/*
* UFS PHY requires the deassert of software reset before serdes start.