[PATCH 1/2] input: touchscreen: stmpe: restrict to device tree mode

[Linus Walleij]

This strips the STMPE touchscreen input driver to only probe
and acquire its configuration from the device tree. No in-kernel
platforms use the static platform data so there is no point in
keeping it around.

Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
Dmitry if you can ACK this I think it is best of it's going in
through Lee's MFD tree with some other cleanups.
---
 drivers/input/touchscreen/stmpe-ts.c | 86 +++++++++++++++++++++---------------
 include/linux/mfd/stmpe.h            | 43 ------------------
 2 files changed, 51 insertions(+), 78 deletions(-)

diff --git a/drivers/input/touchscreen/stmpe-ts.c b/drivers/input/touchscreen/stmpe-ts.c
index 2d5ff86b343f..88a4bc0787c9 100644
--- a/drivers/input/touchscreen/stmpe-ts.c
+++ b/drivers/input/touchscreen/stmpe-ts.c
@@ -63,6 +63,38 @@
 #define STMPE_TS_NAME			"stmpe-ts"
 #define XY_MASK				0xfff
 
+/**
+ * struct stmpe_touch - stmpe811 touch screen controller state
+ * @stmpe: pointer back to STMPE MFD container
+ * @idev: registered input device
+ * @work: a work item used to scan the device
+ * @dev: a pointer back to the MFD cell struct device*
+ * @sample_time: ADC converstion time in number of clock.
+ * (0 -> 36 clocks, 1 -> 44 clocks, 2 -> 56 clocks, 3 -> 64 clocks,
+ * 4 -> 80 clocks, 5 -> 96 clocks, 6 -> 144 clocks),
+ * recommended is 4.
+ * @mod_12b: ADC Bit mode (0 -> 10bit ADC, 1 -> 12bit ADC)
+ * @ref_sel: ADC reference source
+ * (0 -> internal reference, 1 -> external reference)
+ * @adc_freq: ADC Clock speed
+ * (0 -> 1.625 MHz, 1 -> 3.25 MHz, 2 || 3 -> 6.5 MHz)
+ * @ave_ctrl: Sample average control
+ * (0 -> 1 sample, 1 -> 2 samples, 2 -> 4 samples, 3 -> 8 samples)
+ * @touch_det_delay: Touch detect interrupt delay
+ * (0 -> 10 us, 1 -> 50 us, 2 -> 100 us, 3 -> 500 us,
+ * 4-> 1 ms, 5 -> 5 ms, 6 -> 10 ms, 7 -> 50 ms)
+ * recommended is 3
+ * @settling: Panel driver settling time
+ * (0 -> 10 us, 1 -> 100 us, 2 -> 500 us, 3 -> 1 ms,
+ * 4 -> 5 ms, 5 -> 10 ms, 6 for 50 ms, 7 -> 100 ms)
+ * recommended is 2
+ * @fraction_z: Length of the fractional part in z
+ * (fraction_z ([0..7]) = Count of the fractional part)
+ * recommended is 7
+ * @i_drive: current limit value of the touchscreen drivers
+ * (0 -> 20 mA typical 35 mA max, 1 -> 50 mA typical 80 mA max)
+ *
+ */
 struct stmpe_touch {
 	struct stmpe *stmpe;
 	struct input_dev *idev;
@@ -269,44 +301,28 @@ static void stmpe_ts_get_platform_info(struct platform_device *pdev,
 {
 	struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);
 	struct device_node *np = pdev->dev.of_node;
-	struct stmpe_ts_platform_data *ts_pdata = NULL;
+	u32 val;
 
 	ts->stmpe = stmpe;
 
-	if (stmpe->pdata && stmpe->pdata->ts) {
-		ts_pdata = stmpe->pdata->ts;
-
-		ts->sample_time = ts_pdata->sample_time;
-		ts->mod_12b = ts_pdata->mod_12b;
-		ts->ref_sel = ts_pdata->ref_sel;
-		ts->adc_freq = ts_pdata->adc_freq;
-		ts->ave_ctrl = ts_pdata->ave_ctrl;
-		ts->touch_det_delay = ts_pdata->touch_det_delay;
-		ts->settling = ts_pdata->settling;
-		ts->fraction_z = ts_pdata->fraction_z;
-		ts->i_drive = ts_pdata->i_drive;
-	} else if (np) {
-		u32 val;
-
-		if (!of_property_read_u32(np, "st,sample-time", &val))
-			ts->sample_time = val;
-		if (!of_property_read_u32(np, "st,mod-12b", &val))
-			ts->mod_12b = val;
-		if (!of_property_read_u32(np, "st,ref-sel", &val))
-			ts->ref_sel = val;
-		if (!of_property_read_u32(np, "st,adc-freq", &val))
-			ts->adc_freq = val;
-		if (!of_property_read_u32(np, "st,ave-ctrl", &val))
-			ts->ave_ctrl = val;
-		if (!of_property_read_u32(np, "st,touch-det-delay", &val))
-			ts->touch_det_delay = val;
-		if (!of_property_read_u32(np, "st,settling", &val))
-			ts->settling = val;
-		if (!of_property_read_u32(np, "st,fraction-z", &val))
-			ts->fraction_z = val;
-		if (!of_property_read_u32(np, "st,i-drive", &val))
-			ts->i_drive = val;
-	}
+	if (!of_property_read_u32(np, "st,sample-time", &val))
+		ts->sample_time = val;
+	if (!of_property_read_u32(np, "st,mod-12b", &val))
+		ts->mod_12b = val;
+	if (!of_property_read_u32(np, "st,ref-sel", &val))
+		ts->ref_sel = val;
+	if (!of_property_read_u32(np, "st,adc-freq", &val))
+		ts->adc_freq = val;
+	if (!of_property_read_u32(np, "st,ave-ctrl", &val))
+		ts->ave_ctrl = val;
+	if (!of_property_read_u32(np, "st,touch-det-delay", &val))
+		ts->touch_det_delay = val;
+	if (!of_property_read_u32(np, "st,settling", &val))
+		ts->settling = val;
+	if (!of_property_read_u32(np, "st,fraction-z", &val))
+		ts->fraction_z = val;
+	if (!of_property_read_u32(np, "st,i-drive", &val))
+		ts->i_drive = val;
 }
 
 static int stmpe_input_probe(struct platform_device *pdev)
diff --git a/include/linux/mfd/stmpe.h b/include/linux/mfd/stmpe.h
index c9d869027300..93e62ae32906 100644
--- a/include/linux/mfd/stmpe.h
+++ b/include/linux/mfd/stmpe.h
@@ -117,46 +117,6 @@ extern int stmpe_disable(struct stmpe *stmpe, unsigned int blocks);
 
 #define STMPE_GPIO_NOREQ_811_TOUCH	(0xf0)
 
-/**
- * struct stmpe_ts_platform_data - stmpe811 touch screen controller platform
- * data
- * @sample_time: ADC converstion time in number of clock.
- * (0 -> 36 clocks, 1 -> 44 clocks, 2 -> 56 clocks, 3 -> 64 clocks,
- * 4 -> 80 clocks, 5 -> 96 clocks, 6 -> 144 clocks),
- * recommended is 4.
- * @mod_12b: ADC Bit mode (0 -> 10bit ADC, 1 -> 12bit ADC)
- * @ref_sel: ADC reference source
- * (0 -> internal reference, 1 -> external reference)
- * @adc_freq: ADC Clock speed
- * (0 -> 1.625 MHz, 1 -> 3.25 MHz, 2 || 3 -> 6.5 MHz)
- * @ave_ctrl: Sample average control
- * (0 -> 1 sample, 1 -> 2 samples, 2 -> 4 samples, 3 -> 8 samples)
- * @touch_det_delay: Touch detect interrupt delay
- * (0 -> 10 us, 1 -> 50 us, 2 -> 100 us, 3 -> 500 us,
- * 4-> 1 ms, 5 -> 5 ms, 6 -> 10 ms, 7 -> 50 ms)
- * recommended is 3
- * @settling: Panel driver settling time
- * (0 -> 10 us, 1 -> 100 us, 2 -> 500 us, 3 -> 1 ms,
- * 4 -> 5 ms, 5 -> 10 ms, 6 for 50 ms, 7 -> 100 ms)
- * recommended is 2
- * @fraction_z: Length of the fractional part in z
- * (fraction_z ([0..7]) = Count of the fractional part)
- * recommended is 7
- * @i_drive: current limit value of the touchscreen drivers
- * (0 -> 20 mA typical 35 mA max, 1 -> 50 mA typical 80 mA max)
- *
- * */
-struct stmpe_ts_platform_data {
-       u8 sample_time;
-       u8 mod_12b;
-       u8 ref_sel;
-       u8 adc_freq;
-       u8 ave_ctrl;
-       u8 touch_det_delay;
-       u8 settling;
-       u8 fraction_z;
-       u8 i_drive;
-};
 
 /**
  * struct stmpe_platform_data - STMPE platform data
@@ -168,7 +128,6 @@ struct stmpe_ts_platform_data {
  * @irq_over_gpio: true if gpio is used to get irq
  * @irq_gpio: gpio number over which irq will be requested (significant only if
  *	      irq_over_gpio is true)
- * @ts: touchscreen-specific platform data
  */
 struct stmpe_platform_data {
 	int id;
@@ -178,8 +137,6 @@ struct stmpe_platform_data {
 	bool irq_over_gpio;
 	int irq_gpio;
 	int autosleep_timeout;
-
-	struct stmpe_ts_platform_data *ts;
 };
 
 #endif
-- 
1.9.3

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