diff options
Diffstat (limited to 'drivers/ufs/host/ufs-qcom.c')
| -rw-r--r-- | drivers/ufs/host/ufs-qcom.c | 74 |
1 files changed, 35 insertions, 39 deletions
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 2a72e7c1d131..76fc70503a62 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -532,6 +532,12 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba) goto out_disable_phy; } + ret = phy_calibrate(phy); + if (ret) { + dev_err(hba->dev, "Failed to calibrate PHY: %d\n", ret); + goto out_disable_phy; + } + ufs_qcom_select_unipro_mode(host); return 0; @@ -726,26 +732,17 @@ static int ufs_qcom_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op, enum ufs_notify_change_status status) { struct ufs_qcom_host *host = ufshcd_get_variant(hba); - struct phy *phy = host->generic_phy; if (status == PRE_CHANGE) return 0; - if (ufs_qcom_is_link_off(hba)) { - /* - * Disable the tx/rx lane symbol clocks before PHY is - * powered down as the PLL source should be disabled - * after downstream clocks are disabled. - */ + if (!ufs_qcom_is_link_active(hba)) ufs_qcom_disable_lane_clks(host); - phy_power_off(phy); - /* reset the connected UFS device during power down */ - ufs_qcom_device_reset_ctrl(hba, true); - } else if (!ufs_qcom_is_link_active(hba)) { - ufs_qcom_disable_lane_clks(host); - } + /* reset the connected UFS device during power down */ + if (ufs_qcom_is_link_off(hba) && host->device_reset) + ufs_qcom_device_reset_ctrl(hba, true); return ufs_qcom_ice_suspend(host); } @@ -753,26 +750,11 @@ static int ufs_qcom_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op, static int ufs_qcom_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) { struct ufs_qcom_host *host = ufshcd_get_variant(hba); - struct phy *phy = host->generic_phy; int err; - if (ufs_qcom_is_link_off(hba)) { - err = phy_power_on(phy); - if (err) { - dev_err(hba->dev, "%s: failed PHY power on: %d\n", - __func__, err); - return err; - } - - err = ufs_qcom_enable_lane_clks(host); - if (err) - return err; - - } else if (!ufs_qcom_is_link_active(hba)) { - err = ufs_qcom_enable_lane_clks(host); - if (err) - return err; - } + err = ufs_qcom_enable_lane_clks(host); + if (err) + return err; return ufs_qcom_ice_resume(host); } @@ -1151,12 +1133,20 @@ static void ufs_qcom_set_caps(struct ufs_hba *hba) * @on: If true, enable clocks else disable them. * @status: PRE_CHANGE or POST_CHANGE notify * + * There are certain clocks which comes from the PHY so it needs + * to be managed together along with controller clocks which also + * provides a better power saving. Hence keep phy_power_off/on calls + * in ufs_qcom_setup_clocks, so that PHY's regulators & clks can be + * turned on/off along with UFS's clocks. + * * Return: 0 on success, non-zero on failure. */ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on, enum ufs_notify_change_status status) { struct ufs_qcom_host *host = ufshcd_get_variant(hba); + struct phy *phy; + int err; /* * In case ufs_qcom_init() is not yet done, simply ignore. @@ -1166,6 +1156,8 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on, if (!host) return 0; + phy = host->generic_phy; + switch (status) { case PRE_CHANGE: if (on) { @@ -1175,10 +1167,22 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on, /* disable device ref_clk */ ufs_qcom_dev_ref_clk_ctrl(host, false); } + + err = phy_power_off(phy); + if (err) { + dev_err(hba->dev, "phy power off failed, ret=%d\n", err); + return err; + } } break; case POST_CHANGE: if (on) { + err = phy_power_on(phy); + if (err) { + dev_err(hba->dev, "phy power on failed, ret = %d\n", err); + return err; + } + /* enable the device ref clock for HS mode*/ if (ufshcd_is_hs_mode(&hba->pwr_info)) ufs_qcom_dev_ref_clk_ctrl(host, true); @@ -1894,7 +1898,6 @@ static int ufs_qcom_device_reset(struct ufs_hba *hba) return 0; } -#if IS_ENABLED(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND) static void ufs_qcom_config_scaling_param(struct ufs_hba *hba, struct devfreq_dev_profile *p, struct devfreq_simple_ondemand_data *d) @@ -1906,13 +1909,6 @@ static void ufs_qcom_config_scaling_param(struct ufs_hba *hba, hba->clk_scaling.suspend_on_no_request = true; } -#else -static void ufs_qcom_config_scaling_param(struct ufs_hba *hba, - struct devfreq_dev_profile *p, - struct devfreq_simple_ondemand_data *data) -{ -} -#endif /* Resources */ static const struct ufshcd_res_info ufs_res_info[RES_MAX] = { |