diff options
| author | Evan Green <evgreen@chromium.org> | 2019-03-21 10:17:59 -0700 |
|---|---|---|
| committer | Kishon Vijay Abraham I <kishon@ti.com> | 2019-04-17 14:12:56 +0530 |
| commit | c9b589791fc1b37fdca35b621dae62e98e4c95fc (patch) | |
| tree | 6049f17f5e3586f311376670fd2ff5287e9a0828 /drivers/phy/qualcomm/phy-qcom-ufs.c | |
| parent | 12fd5f250db2ad6b292d3a28bc3c0011fe30511f (diff) | |
| download | linux-c9b589791fc1b37fdca35b621dae62e98e4c95fc.tar.bz2 | |
phy: qcom: Utilize UFS reset controller
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>
Diffstat (limited to 'drivers/phy/qualcomm/phy-qcom-ufs.c')
| -rw-r--r-- | drivers/phy/qualcomm/phy-qcom-ufs.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/phy/qualcomm/phy-qcom-ufs.c b/drivers/phy/qualcomm/phy-qcom-ufs.c index f2979ccad00a..fe59785a55f2 100644 --- a/drivers/phy/qualcomm/phy-qcom-ufs.c +++ b/drivers/phy/qualcomm/phy-qcom-ufs.c @@ -147,6 +147,22 @@ out: } EXPORT_SYMBOL_GPL(ufs_qcom_phy_generic_probe); +int ufs_qcom_phy_get_reset(struct ufs_qcom_phy *phy_common) +{ + struct reset_control *reset; + + if (phy_common->ufs_reset) + return 0; + + reset = devm_reset_control_get_exclusive_by_index(phy_common->dev, 0); + if (IS_ERR(reset)) + return PTR_ERR(reset); + + phy_common->ufs_reset = reset; + return 0; +} +EXPORT_SYMBOL_GPL(ufs_qcom_phy_get_reset); + static int __ufs_qcom_phy_clk_get(struct device *dev, const char *name, struct clk **clk_out, bool err_print) { @@ -533,6 +549,12 @@ int ufs_qcom_phy_power_on(struct phy *generic_phy) if (phy_common->is_powered_on) return 0; + err = reset_control_deassert(phy_common->ufs_reset); + if (err) { + dev_err(dev, "Failed to assert UFS PHY reset"); + return err; + } + if (!phy_common->is_started) { err = ufs_qcom_phy_start_serdes(phy_common); if (err) @@ -620,6 +642,7 @@ int ufs_qcom_phy_power_off(struct phy *generic_phy) ufs_qcom_phy_disable_vreg(phy_common->dev, &phy_common->vdda_pll); ufs_qcom_phy_disable_vreg(phy_common->dev, &phy_common->vdda_phy); + reset_control_assert(phy_common->ufs_reset); phy_common->is_powered_on = false; return 0; |