Merge Linus master into drm-next

The merge is clean, but the arm build fails afterwards,
due to API changes in the regulator tree.

I've included the patch into the merge to fix the build.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 34 insertions, 12 deletions

diff --git a/drivers/input/touchscreen/sun4i-ts.c b/drivers/input/touchscreen/sun4i-ts.c
index b93a28b955fd..c0116994067d 100644
--- a/drivers/input/touchscreen/sun4i-ts.c
+++ b/drivers/input/touchscreen/sun4i-ts.c
@@ -30,6 +30,10 @@
  * These kinds of heuristics are just asking for trouble (and don't belong
  * in the kernel). So this driver offers straight forward, reliable single
  * touch functionality only.
+ *
+ * s.a. A20 User Manual "1.15 TP" (Documentation/arm/sunxi/README)
+ * (looks like the description in the A20 User Manual v1.3 is better
+ * than the one in the A10 User Manual v.1.5)
  */
 
 #include <linux/err.h>
@@ -193,7 +197,7 @@ static int sun4i_get_temp(const struct sun4i_ts_data *ts, long *temp)
 	if (ts->temp_data == -1)
 		return -EAGAIN;
 
-	*temp = (ts->temp_data - ts->temp_offset) * ts->temp_step;
+	*temp = ts->temp_data * ts->temp_step - ts->temp_offset;
 
 	return 0;
 }
@@ -246,6 +250,8 @@ static int sun4i_ts_probe(struct platform_device *pdev)
 	int error;
 	u32 reg;
 	bool ts_attached;
+	u32 tp_sensitive_adjust = 15;
+	u32 filter_type = 1;
 
 	ts = devm_kzalloc(dev, sizeof(struct sun4i_ts_data), GFP_KERNEL);
 	if (!ts)
@@ -255,22 +261,31 @@ static int sun4i_ts_probe(struct platform_device *pdev)
 	ts->ignore_fifo_data = true;
 	ts->temp_data = -1;
 	if (of_device_is_compatible(np, "allwinner,sun6i-a31-ts")) {
-		/* Allwinner SDK has temperature = -271 + (value / 6) (C) */
-		ts->temp_offset = 1626;
+		/* Allwinner SDK has temperature (C) = (value / 6) - 271 */
+		ts->temp_offset = 271000;
 		ts->temp_step = 167;
+	} else if (of_device_is_compatible(np, "allwinner,sun4i-a10-ts")) {
+		/*
+		 * The A10 temperature sensor has quite a wide spread, these
+		 * parameters are based on the averaging of the calibration
+		 * results of 4 completely different boards, with a spread of
+		 * temp_step from 0.096 - 0.170 and temp_offset from 176 - 331.
+		 */
+		ts->temp_offset = 257000;
+		ts->temp_step = 133;
 	} else {
 		/*
 		 * The user manuals do not contain the formula for calculating
 		 * the temperature. The formula used here is from the AXP209,
 		 * which is designed by X-Powers, an affiliate of Allwinner:
 		 *
-		 *     temperature = -144.7 + (value * 0.1)
+		 *     temperature (C) = (value * 0.1) - 144.7
 		 *
 		 * Allwinner does not have any documentation whatsoever for
 		 * this hardware. Moreover, it is claimed that the sensor
 		 * is inaccurate and cannot work properly.
 		 */
-		ts->temp_offset = 1447;
+		ts->temp_offset = 144700;
 		ts->temp_step = 100;
 	}
 
@@ -313,14 +328,20 @@ static int sun4i_ts_probe(struct platform_device *pdev)
 	       ts->base + TP_CTRL0);
 
 	/*
-	 * sensitive_adjust = 15 : max, which is not all that sensitive,
+	 * tp_sensitive_adjust is an optional property
 	 * tp_mode = 0 : only x and y coordinates, as we don't use dual touch
 	 */
-	writel(TP_SENSITIVE_ADJUST(15) | TP_MODE_SELECT(0),
+	of_property_read_u32(np, "allwinner,tp-sensitive-adjust",
+			     &tp_sensitive_adjust);
+	writel(TP_SENSITIVE_ADJUST(tp_sensitive_adjust) | TP_MODE_SELECT(0),
 	       ts->base + TP_CTRL2);
 
-	/* Enable median filter, type 1 : 5/3 */
-	writel(FILTER_EN(1) | FILTER_TYPE(1), ts->base + TP_CTRL3);
+	/*
+	 * Enable median and averaging filter, optional property for
+	 * filter type.
+	 */
+	of_property_read_u32(np, "allwinner,filter-type", &filter_type);
+	writel(FILTER_EN(1) | FILTER_TYPE(filter_type), ts->base + TP_CTRL3);
 
 	/* Enable temperature measurement, period 1953 (2 seconds) */
 	writel(TEMP_ENABLE(1) | TEMP_PERIOD(1953), ts->base + TP_TPR);
@@ -330,10 +351,10 @@ static int sun4i_ts_probe(struct platform_device *pdev)
 	 * finally enable tp mode.
 	 */
 	reg = STYLUS_UP_DEBOUN(5) | STYLUS_UP_DEBOUN_EN(1);
-	if (of_device_is_compatible(np, "allwinner,sun4i-a10-ts"))
-		reg |= TP_MODE_EN(1);
-	else
+	if (of_device_is_compatible(np, "allwinner,sun6i-a31-ts"))
 		reg |= SUN6I_TP_MODE_EN(1);
+	else
+		reg |= TP_MODE_EN(1);
 	writel(reg, ts->base + TP_CTRL1);
 
 	/*
@@ -383,6 +404,7 @@ static int sun4i_ts_remove(struct platform_device *pdev)
 
 static const struct of_device_id sun4i_ts_of_match[] = {
 	{ .compatible = "allwinner,sun4i-a10-ts", },
+	{ .compatible = "allwinner,sun5i-a13-ts", },
 	{ .compatible = "allwinner,sun6i-a31-ts", },
 	{ /* sentinel */ }
 };