Merge tag 'backlight-next-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight

torvalds · torvalds · commit c969f2451b53 · 2021-04-28T16:02:58.000-07:00
Pull backlight updates from Lee Jones:
 "New Device Support:
   - Add support for PMI8994 to Qualcom WLED
   - Add support for KTD259 to Kinetic KTD253

  Fix-ups:
   - Device Tree related fix-ups; kinetic,ktd253
   - Use proper sequence during sync_toggle; qcom-wled
   - Fix Wmisleading-indentation warnings; jornada720_bl

  Bug Fixes:
   - Fix sync toggle on WLED4; qcom-wled
   - Fix FSC update on WLED5; qcom-wled"

* tag 'backlight-next-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight:
  backlight: journada720: Fix Wmisleading-indentation warning
  backlight: qcom-wled: Correct the sync_toggle sequence
  backlight: qcom-wled: Fix FSC update issue for WLED5
  dt-bindings: backlight: Add Kinetic KTD259 bindings
  backlight: ktd253: Support KTD259
  backlight: qcom-wled: Use sink_addr for sync toggle
  dt-bindings: backlight: qcom-wled: Add PMI8994 compatible
diff --git a/Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml b/Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml
@@ -4,13 +4,13 @@
 $id: http://devicetree.org/schemas/leds/backlight/kinetic,ktd253.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Kinetic Technologies KTD253 one-wire backlight
+title: Kinetic Technologies KTD253 and KTD259 one-wire backlight
 
 maintainers:
   - Linus Walleij <linus.walleij@linaro.org>
 
 description: |
-  The Kinetic Technologies KTD253 is a white LED backlight that is
+  The Kinetic Technologies KTD253 and KTD259 are white LED backlights
   controlled by a single GPIO line. If you just turn on the backlight
   it goes to maximum backlight then you can set the level of backlight
   using pulses on the enable wire. This is sometimes referred to as
@@ -21,7 +21,10 @@ allOf:
 
 properties:
   compatible:
-    const: kinetic,ktd253
+    items:
+      - enum:
+          - kinetic,ktd253
+          - kinetic,ktd259
 
   enable-gpios:
     description: GPIO to use to enable/disable and dim the backlight.
diff --git a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml
@@ -19,6 +19,7 @@ properties:
   compatible:
     enum:
       - qcom,pm8941-wled
+      - qcom,pmi8994-wled
       - qcom,pmi8998-wled
       - qcom,pm660l-wled
       - qcom,pm8150l-wled
diff --git a/drivers/video/backlight/jornada720_bl.c b/drivers/video/backlight/jornada720_bl.c
@@ -66,30 +66,30 @@ static int jornada_bl_update_status(struct backlight_device *bd)
 	} else  /* turn on backlight */
 		PPSR |= PPC_LDD1;
 
-		/* send command to our mcu */
-		if (jornada_ssp_byte(SETBRIGHTNESS) != TXDUMMY) {
-			dev_info(&bd->dev, "failed to set brightness\n");
-			ret = -ETIMEDOUT;
-			goto out;
-		}
+	/* send command to our mcu */
+	if (jornada_ssp_byte(SETBRIGHTNESS) != TXDUMMY) {
+		dev_info(&bd->dev, "failed to set brightness\n");
+		ret = -ETIMEDOUT;
+		goto out;
+	}
 
-		/*
-		 * at this point we expect that the mcu has accepted
-		 * our command and is waiting for our new value
-		 * please note that maximum brightness is 255,
-		 * but due to physical layout it is equal to 0, so we simply
-		 * invert the value (MAX VALUE - NEW VALUE).
-		 */
-		if (jornada_ssp_byte(BL_MAX_BRIGHT - bd->props.brightness)
-			!= TXDUMMY) {
-			dev_err(&bd->dev, "set brightness failed\n");
-			ret = -ETIMEDOUT;
-		}
+	/*
+	 * at this point we expect that the mcu has accepted
+	 * our command and is waiting for our new value
+	 * please note that maximum brightness is 255,
+	 * but due to physical layout it is equal to 0, so we simply
+	 * invert the value (MAX VALUE - NEW VALUE).
+	 */
+	if (jornada_ssp_byte(BL_MAX_BRIGHT - bd->props.brightness)
+		!= TXDUMMY) {
+		dev_err(&bd->dev, "set brightness failed\n");
+		ret = -ETIMEDOUT;
+	}
 
-		/*
-		 * If infact we get an TXDUMMY as output we are happy and dont
-		 * make any further comments about it
-		 */
+	/*
+	 * If infact we get an TXDUMMY as output we are happy and dont
+	 * make any further comments about it
+	 */
 out:
 	jornada_ssp_end();
 
diff --git a/drivers/video/backlight/ktd253-backlight.c b/drivers/video/backlight/ktd253-backlight.c
@@ -173,6 +173,7 @@ static int ktd253_backlight_probe(struct platform_device *pdev)
 
 static const struct of_device_id ktd253_backlight_of_match[] = {
 	{ .compatible = "kinetic,ktd253" },
+	{ .compatible = "kinetic,ktd259" },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, ktd253_backlight_of_match);
diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c
@@ -336,34 +336,34 @@ static int wled3_sync_toggle(struct wled *wled)
 	unsigned int mask = GENMASK(wled->max_string_count - 1, 0);
 
 	rc = regmap_update_bits(wled->regmap,
-				wled->ctrl_addr + WLED3_SINK_REG_SYNC,
-				mask, mask);
+				wled->sink_addr + WLED3_SINK_REG_SYNC,
+				mask, WLED3_SINK_REG_SYNC_CLEAR);
 	if (rc < 0)
 		return rc;
 
 	rc = regmap_update_bits(wled->regmap,
-				wled->ctrl_addr + WLED3_SINK_REG_SYNC,
-				mask, WLED3_SINK_REG_SYNC_CLEAR);
+				wled->sink_addr + WLED3_SINK_REG_SYNC,
+				mask, mask);
 
 	return rc;
 }
 
-static int wled5_sync_toggle(struct wled *wled)
+static int wled5_mod_sync_toggle(struct wled *wled)
 {
 	int rc;
 	u8 val;
 
-	val = (wled->cfg.mod_sel == MOD_A) ? WLED5_SINK_REG_SYNC_MOD_A_BIT :
-					     WLED5_SINK_REG_SYNC_MOD_B_BIT;
 	rc = regmap_update_bits(wled->regmap,
 				wled->sink_addr + WLED5_SINK_REG_MOD_SYNC_BIT,
-				WLED5_SINK_REG_SYNC_MASK, val);
+				WLED5_SINK_REG_SYNC_MASK, 0);
 	if (rc < 0)
 		return rc;
 
+	val = (wled->cfg.mod_sel == MOD_A) ? WLED5_SINK_REG_SYNC_MOD_A_BIT :
+					     WLED5_SINK_REG_SYNC_MOD_B_BIT;
 	return regmap_update_bits(wled->regmap,
 				  wled->sink_addr + WLED5_SINK_REG_MOD_SYNC_BIT,
-				  WLED5_SINK_REG_SYNC_MASK, 0);
+				  WLED5_SINK_REG_SYNC_MASK, val);
 }
 
 static int wled_ovp_fault_status(struct wled *wled, bool *fault_set)
@@ -445,10 +445,23 @@ static int wled_update_status(struct backlight_device *bl)
 			goto unlock_mutex;
 		}
 
-		rc = wled->wled_sync_toggle(wled);
-		if (rc < 0) {
-			dev_err(wled->dev, "wled sync failed rc:%d\n", rc);
-			goto unlock_mutex;
+		if (wled->version < 5) {
+			rc = wled->wled_sync_toggle(wled);
+			if (rc < 0) {
+				dev_err(wled->dev, "wled sync failed rc:%d\n", rc);
+				goto unlock_mutex;
+			}
+		} else {
+			/*
+			 * For WLED5 toggling the MOD_SYNC_BIT updates the
+			 * brightness
+			 */
+			rc = wled5_mod_sync_toggle(wled);
+			if (rc < 0) {
+				dev_err(wled->dev, "wled mod sync failed rc:%d\n",
+					rc);
+				goto unlock_mutex;
+			}
 		}
 	}
 
@@ -1459,7 +1472,7 @@ static int wled_configure(struct wled *wled)
 		size = ARRAY_SIZE(wled5_opts);
 		*cfg = wled5_config_defaults;
 		wled->wled_set_brightness = wled5_set_brightness;
-		wled->wled_sync_toggle = wled5_sync_toggle;
+		wled->wled_sync_toggle = wled3_sync_toggle;
 		wled->wled_cabc_config = wled5_cabc_config;
 		wled->wled_ovp_delay = wled5_ovp_delay;
 		wled->wled_auto_detection_required =
