static int ufshcd_setup_clocks(struct ufs_hba *hba, bool on);
static int ufshcd_uic_hibern8_exit(struct ufs_hba *hba);
static int ufshcd_uic_hibern8_enter(struct ufs_hba *hba);
+static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba *hba);
static int ufshcd_host_reset_and_restore(struct ufs_hba *hba);
static irqreturn_t ufshcd_intr(int irq, void *__hba);
static int ufshcd_config_pwr_mode(struct ufs_hba *hba,
ufshcd_hold(hba, false);
mutex_lock(&hba->uic_cmd_mutex);
+ ufshcd_add_delay_before_dme_cmd(hba);
+
spin_lock_irqsave(hba->host->host_lock, flags);
ret = __ufshcd_send_uic_cmd(hba, uic_cmd);
spin_unlock_irqrestore(hba->host->host_lock, flags);
return ret;
}
+static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba *hba)
+{
+ #define MIN_DELAY_BEFORE_DME_CMDS_US 1000
+ unsigned long min_sleep_time_us;
+
+ if (!(hba->quirks & UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS))
+ return;
+
+ /*
+ * last_dme_cmd_tstamp will be 0 only for 1st call to
+ * this function
+ */
+ if (unlikely(!ktime_to_us(hba->last_dme_cmd_tstamp))) {
+ min_sleep_time_us = MIN_DELAY_BEFORE_DME_CMDS_US;
+ } else {
+ unsigned long delta =
+ (unsigned long) ktime_to_us(
+ ktime_sub(ktime_get(),
+ hba->last_dme_cmd_tstamp));
+
+ if (delta < MIN_DELAY_BEFORE_DME_CMDS_US)
+ min_sleep_time_us =
+ MIN_DELAY_BEFORE_DME_CMDS_US - delta;
+ else
+ return; /* no more delay required */
+ }
+
+ /* allow sleep for extra 50us if needed */
+ usleep_range(min_sleep_time_us, min_sleep_time_us + 50);
+}
+
/**
* ufshcd_dme_set_attr - UIC command for DME_SET, DME_PEER_SET
* @hba: per adapter instance
mutex_lock(&hba->uic_cmd_mutex);
init_completion(&uic_async_done);
+ ufshcd_add_delay_before_dme_cmd(hba);
spin_lock_irqsave(hba->host->host_lock, flags);
hba->uic_async_done = &uic_async_done;
static int ufshcd_config_vreg_load(struct device *dev, struct ufs_vreg *vreg,
int ua)
{
- int ret = 0;
- struct regulator *reg = vreg->reg;
- const char *name = vreg->name;
+ int ret;
- BUG_ON(!vreg);
+ if (!vreg)
+ return 0;
- ret = regulator_set_optimum_mode(reg, ua);
- if (ret >= 0) {
- /*
- * regulator_set_optimum_mode() returns new regulator
- * mode upon success.
- */
- ret = 0;
- } else {
- dev_err(dev, "%s: %s set optimum mode(ua=%d) failed, err=%d\n",
- __func__, name, ua, ret);
+ ret = regulator_set_load(vreg->reg, ua);
+ if (ret < 0) {
+ dev_err(dev, "%s: %s set load (ua=%d) failed, err=%d\n",
+ __func__, vreg->name, ua, ret);
}
return ret;
static inline int ufshcd_config_vreg_lpm(struct ufs_hba *hba,
struct ufs_vreg *vreg)
{
- if (!vreg)
- return 0;
-
return ufshcd_config_vreg_load(hba->dev, vreg, UFS_VREG_LPM_LOAD_UA);
}
static inline int ufshcd_config_vreg_hpm(struct ufs_hba *hba,
struct ufs_vreg *vreg)
{
- if (!vreg)
- return 0;
-
return ufshcd_config_vreg_load(hba->dev, vreg, vreg->max_uA);
}