On 01/23/15 16:54, Bjorn Andersson wrote:

+
+static int pm8941_wled_set(struct led_classdev *cdev,
+			   enum led_brightness value)
+{
+	struct pm8941_wled *wled;
+	u8 ctrl = 0;
+	u16 val;
+	int rc;
+	int i;
+
+	wled = container_of(cdev, struct pm8941_wled, cdev);
+
+	if (value != 0)
+		ctrl = PM8941_WLED_REG_MOD_EN_BIT;
+
+	val = value * PM8941_WLED_REG_VAL_MAX / LED_FULL;
+
+	rc = regmap_update_bits(wled->regmap,
+			wled->addr + PM8941_WLED_REG_MOD_EN,
+			PM8941_WLED_REG_MOD_EN_MASK, ctrl);
+	if (rc)
+		return rc;
+
+	for (i = 0; i < wled->cfg.num_strings; ++i) {
+		u8 v[2] = { val & 0xff, (val >> 8) & 0xf };
+
+		rc = regmap_bulk_write(wled->regmap,
+				wled->addr + PM8941_WLED_REG_VAL_BASE + 2 * i,
+				v, 2);
+		if (rc)
+			return rc;
+	}
+
+	rc = regmap_update_bits(wled->regmap,
+			wled->addr + PM8941_WLED_REG_SYNC,
+			PM8941_WLED_REG_SYNC_MASK, PM8941_WLED_REG_SYNC_ALL);
+	if (rc)
+		return rc;
+
+	rc = regmap_update_bits(wled->regmap,
+			wled->addr + PM8941_WLED_REG_SYNC,
+			PM8941_WLED_REG_SYNC_MASK, PM8941_WLED_REG_SYNC_CLEAR);
+	return rc;
+}

This doesn't seem to do anything for the OVP spike mentioned in this
patch[1]. Do you see that problem on your device? I imagine the PMIC is
the same.

[1]
https://www.codeaurora.org/cgit/quic/la/kernel/msm/commit/?id=fef9e15072562f0f28dc7066dcdd69388df81ed3

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