Hello Stephen,
Thanks for the review comments.
On 4/6/2018 10:10 PM, Stephen Boyd wrote:
Quoting Taniya Das (2018-04-02 03:45:45)
diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c
index e89584e..e0c83ba 100644
--- a/drivers/clk/qcom/gdsc.c
+++ b/drivers/clk/qcom/gdsc.c
@@ -83,6 +88,38 @@ static int gdsc_poll_status(struct gdsc *sc, unsigned int reg, bool en)
return -ETIMEDOUT;
}
+static int gdsc_is_enabled_by_poll_cfg_reg(struct gdsc *sc, bool en)
+{
+ u32 val;
+ int ret;
+
+ ret = regmap_read(sc->regmap, sc->gdscr + CFG_GDSCR_OFFSET, &val);
+ if (ret)
+ return ret;
+
+ if (en)
+ return !!(val & GDSC_POWER_UP_COMPLETE);
+ else
+ return !(val & GDSC_POWER_DOWN_COMPLETE);
Make this into
if (en)
return ...
return ...
Will fix this in the next series.
+}
+
+static int gdsc_poll_cfg_status(struct gdsc *sc, bool en)
+{
+ ktime_t start = ktime_get();
+ ktime_t timeout =
+ (sc->flags & GDS_TIMEOUT) ? TIMEOUT_US_GDS : TIMEOUT_US;
+
+ do {
+ if (gdsc_is_enabled_by_poll_cfg_reg(sc, en) == en)
+ return 0;
+ } while (ktime_us_delta(ktime_get(), start) < timeout);
+
+ if (gdsc_is_enabled_by_poll_cfg_reg(sc, en) == en)
+ return 0;
+
+ return -ETIMEDOUT;
+}
+
static int gdsc_toggle_logic(struct gdsc *sc, bool en)
{
int ret;
@@ -106,6 +143,9 @@ static int gdsc_toggle_logic(struct gdsc *sc, bool en)
return 0;
}
+ if (sc->flags & POLL_CFG_GDSCR)
+ return gdsc_poll_cfg_status(sc, en);
+
if (sc->gds_hw_ctrl) {
status_reg = sc->gds_hw_ctrl;
/*
@@ -258,8 +298,12 @@ static int gdsc_disable(struct generic_pm_domain *domain)
*/
udelay(1);
- reg = sc->gds_hw_ctrl ? sc->gds_hw_ctrl : sc->gdscr;
- ret = gdsc_poll_status(sc, reg, true);
+ if (sc->flags & POLL_CFG_GDSCR) {
+ ret = gdsc_poll_cfg_status(sc, true);
+ } else {
+ reg = sc->gds_hw_ctrl ? sc->gds_hw_ctrl : sc->gdscr;
+ ret = gdsc_poll_status(sc, reg, true);
+ }
Maybe this can be pushed into the gdsc_poll_status() function so that
we can keep the "how do we poll status bit" logic in one place.
Yes, I will push the logic in the gdsc_poll_status() in the next series.
if (ret)
return ret;
}
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