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phy: qcom-qmp-ufs: drop multi-PHY support

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Each UFS QMP PHY device provides just a single UFS PHY. Drop support
for handling multiple child PHYs.

Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org> # UFS, PCIe and USB on SC8180X
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20220607213203.2819885-26-dmitry.baryshkov@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Dmitry Baryshkov 2022-06-08 00:31:58 +03:00 committed by Vinod Koul
parent 1239fd711f
commit 1da7115efa
1 changed files with 3 additions and 30 deletions
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33
drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
View file

@ -669,8 +669,6 @@ struct qmp_phy {
* @vregs: regulator supplies bulk data
*
* @phys: array of per-lane phy descriptors
* @phy_mutex: mutex lock for PHY common block initialization
* @init_count: phy common block initialization count
* @ufs_reset: optional UFS PHY reset handle
*/
struct qcom_qmp {
@ -681,9 +679,6 @@ struct qcom_qmp {
struct qmp_phy **phys;
struct mutex phy_mutex;
int init_count;
struct reset_control *ufs_reset;
};
@ -931,17 +926,11 @@ static int qcom_qmp_phy_ufs_com_init(struct qmp_phy *qphy)
void __iomem *pcs = qphy->pcs;
int ret;
mutex_lock(&qmp->phy_mutex);
if (qmp->init_count++) {
mutex_unlock(&qmp->phy_mutex);
return 0;
}
/* turn on regulator supplies */
ret = regulator_bulk_enable(cfg->num_vregs, qmp->vregs);
if (ret) {
dev_err(qmp->dev, "failed to enable regulators, err=%d\n", ret);
goto err_unlock;
return ret;
}
ret = clk_bulk_prepare_enable(cfg->num_clks, qmp->clks);
@ -956,14 +945,10 @@ static int qcom_qmp_phy_ufs_com_init(struct qmp_phy *qphy)
qphy_setbits(pcs, QPHY_POWER_DOWN_CONTROL,
cfg->pwrdn_ctrl);
mutex_unlock(&qmp->phy_mutex);
return 0;
err_disable_regulators:
regulator_bulk_disable(cfg->num_vregs, qmp->vregs);
err_unlock:
mutex_unlock(&qmp->phy_mutex);
return ret;
}
@ -973,20 +958,12 @@ static int qcom_qmp_phy_ufs_com_exit(struct qmp_phy *qphy)
struct qcom_qmp *qmp = qphy->qmp;
const struct qmp_phy_cfg *cfg = qphy->cfg;
mutex_lock(&qmp->phy_mutex);
if (--qmp->init_count) {
mutex_unlock(&qmp->phy_mutex);
return 0;
}
reset_control_assert(qmp->ufs_reset);
clk_bulk_disable_unprepare(cfg->num_clks, qmp->clks);
regulator_bulk_disable(cfg->num_vregs, qmp->vregs);
mutex_unlock(&qmp->phy_mutex);
return 0;
}
@ -1322,7 +1299,7 @@ static int qcom_qmp_phy_ufs_probe(struct platform_device *pdev)
struct phy_provider *phy_provider;
void __iomem *serdes;
const struct qmp_phy_cfg *cfg = NULL;
int num, id, expected_phys;
int num, id;
int ret;
qmp = devm_kzalloc(dev, sizeof(*qmp), GFP_KERNEL);
@ -1342,10 +1319,6 @@ static int qcom_qmp_phy_ufs_probe(struct platform_device *pdev)
if (IS_ERR(serdes))
return PTR_ERR(serdes);
expected_phys = cfg->nlanes;
mutex_init(&qmp->phy_mutex);
ret = qcom_qmp_phy_ufs_clk_init(dev, cfg);
if (ret)
return ret;
@ -1360,7 +1333,7 @@ static int qcom_qmp_phy_ufs_probe(struct platform_device *pdev)
num = of_get_available_child_count(dev->of_node);
/* do we have a rogue child node ? */
if (num > expected_phys)
if (num > 1)
return -EINVAL;
qmp->phys = devm_kcalloc(dev, num, sizeof(*qmp->phys), GFP_KERNEL);