[PATCH v6 0/6] Input: imx6ul_tsc - set glitch threshold by dts property

[PATCH v6 0/6] Input: imx6ul_tsc - set glitch threshold by dts property

[Dario Binacchi]

The series allows setting the glitch threshold for the detected signal
from a DTS property instead of a hardcoded value.
In addition, I applied a patch that replaces opencoded masking and
shifting, with BIT(), GENMASK(), FIELD_GET() and FIELD_PREP() macros.

I didn’t remove patches:
 - 2/6 Input: imx6ul_tsc - use BIT, FIELD_{GET,PREP} and GENMASK macros
 - 1/6 Input: imx6ul_tsc - fix typo in register name
even though they were accepted, to avoid generating conflicts detected
by the kernel test robot.

Changes in v6:
- Rename the deglitch property from touchscreen-glitch-threshold-ns to
  debounce-delay-us.

Changes in v5:
- I didn’t remove patches:
   - 2/6 Input: imx6ul_tsc - use BIT, FIELD_{GET,PREP} and GENMASK macros
   - 1/6 Input: imx6ul_tsc - fix typo in register name
  even though they were accepted, to avoid generating conflicts detected
  by the kernel test robot.

Changes in v4:
- Adjust property description fsl,imx6ul-tsc.yaml following the
  suggestions of Conor Dooley and Frank Li.

Changes in v3:
- Remove the final part of the description that refers to
  implementation details in fsl,imx6ul-tsc.yaml.

Changes in v2:
- Replace patch ("dt-bindings: input: touchscreen: fsl,imx6ul-tsc: add
  fsl,glitch-threshold") with ("dt-bindings: touchscreen: add
  touchscreen-glitch-threshold-ns property"), making the previous property
  general by moving it to touchscreen.yaml.
- Rework "Input: imx6ul_tsc - set glitch threshold by DTS property" patch
  to match changes made to the DTS property.
- Move "Input: imx6ul_tsc - use BIT, FIELD_{GET,PREP} and GENMASK macros"
  patch right after the patch fixing the typo.

Dario Binacchi (5):
  Input: imx6ul_tsc - use BIT, FIELD_{GET,PREP} and GENMASK macros
  dt-bindings: touchscreen: add debounce-delay-us property
  dt-bindings: touchscreen: fsl,imx6ul-tsc: support glitch thresold
  ARM: dts: imx6ull-engicam-microgea-bmm: set touchscreen glitch
    threshold
  Input: imx6ul_tsc - set glitch threshold by DTS property

Michael Trimarchi (1):
  Input: imx6ul_tsc - fix typo in register name

 .../input/touchscreen/fsl,imx6ul-tsc.yaml     |  14 ++
 .../input/touchscreen/touchscreen.yaml        |   4 +
 .../nxp/imx/imx6ull-engicam-microgea-bmm.dts  |   1 +
 drivers/input/touchscreen/imx6ul_tsc.c        | 121 +++++++++++-------
 4 files changed, 96 insertions(+), 44 deletions(-)

-- 
2.43.0

base-commit: f975f08c2e899ae2484407d7bba6bb7f8b6d9d40
branch: tsc_de_glitch

[PATCH v6 1/6] Input: imx6ul_tsc - fix typo in register name

[Dario Binacchi]

From: Michael Trimarchi <michael@amarulasolutions.com>

Replace 'SETING' with 'SETTING'.

Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>

---

(no changes since v2)

Changes in v2:
- Add Reviewed-by tag of Frank Li.

 drivers/input/touchscreen/imx6ul_tsc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/input/touchscreen/imx6ul_tsc.c b/drivers/input/touchscreen/imx6ul_tsc.c
index 6ac8fa84ed9f..c2c6e50efc54 100644
--- a/drivers/input/touchscreen/imx6ul_tsc.c
+++ b/drivers/input/touchscreen/imx6ul_tsc.c
@@ -55,7 +55,7 @@
 #define ADC_TIMEOUT		msecs_to_jiffies(100)
 
 /* TSC registers */
-#define REG_TSC_BASIC_SETING	0x00
+#define REG_TSC_BASIC_SETTING	0x00
 #define REG_TSC_PRE_CHARGE_TIME	0x10
 #define REG_TSC_FLOW_CONTROL	0x20
 #define REG_TSC_MEASURE_VALUE	0x30
@@ -192,7 +192,7 @@ static void imx6ul_tsc_set(struct imx6ul_tsc *tsc)
 
 	basic_setting |= tsc->measure_delay_time << 8;
 	basic_setting |= DETECT_4_WIRE_MODE | AUTO_MEASURE;
-	writel(basic_setting, tsc->tsc_regs + REG_TSC_BASIC_SETING);
+	writel(basic_setting, tsc->tsc_regs + REG_TSC_BASIC_SETTING);
 
 	writel(DE_GLITCH_2, tsc->tsc_regs + REG_TSC_DEBUG_MODE2);
 
-- 
2.43.0

[PATCH v6 2/6] Input: imx6ul_tsc - use BIT, FIELD_{GET,PREP} and GENMASK macros

[Dario Binacchi]

Replace opencoded masking and shifting, with BIT(), GENMASK(),
FIELD_GET() and FIELD_PREP() macros.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>

---

(no changes since v2)

Changes in v2:
- Add Reviewed-by tag of Frank Li.
- Move the patch right after the one fixing the typo according
  to Frank Li's suggestions.

 drivers/input/touchscreen/imx6ul_tsc.c | 96 +++++++++++++++-----------
 1 file changed, 54 insertions(+), 42 deletions(-)

diff --git a/drivers/input/touchscreen/imx6ul_tsc.c b/drivers/input/touchscreen/imx6ul_tsc.c
index c2c6e50efc54..e2c59cc7c82c 100644
--- a/drivers/input/touchscreen/imx6ul_tsc.c
+++ b/drivers/input/touchscreen/imx6ul_tsc.c
@@ -7,6 +7,7 @@
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/bitfield.h>
 #include <linux/gpio/consumer.h>
 #include <linux/input.h>
 #include <linux/slab.h>
@@ -20,25 +21,23 @@
 #include <linux/log2.h>
 
 /* ADC configuration registers field define */
-#define ADC_AIEN		(0x1 << 7)
+#define ADC_AIEN		BIT(7)
+#define ADC_ADCH_MASK		GENMASK(4, 0)
 #define ADC_CONV_DISABLE	0x1F
-#define ADC_AVGE		(0x1 << 5)
-#define ADC_CAL			(0x1 << 7)
-#define ADC_CALF		0x2
-#define ADC_12BIT_MODE		(0x2 << 2)
-#define ADC_CONV_MODE_MASK	(0x3 << 2)
+#define ADC_AVGE		BIT(5)
+#define ADC_CAL			BIT(7)
+#define ADC_CALF		BIT(1)
+#define ADC_CONV_MODE_MASK	GENMASK(3, 2)
+#define ADC_12BIT_MODE		0x2
 #define ADC_IPG_CLK		0x00
-#define ADC_INPUT_CLK_MASK	0x3
-#define ADC_CLK_DIV_8		(0x03 << 5)
-#define ADC_CLK_DIV_MASK	(0x3 << 5)
-#define ADC_SHORT_SAMPLE_MODE	(0x0 << 4)
-#define ADC_SAMPLE_MODE_MASK	(0x1 << 4)
-#define ADC_HARDWARE_TRIGGER	(0x1 << 13)
-#define ADC_AVGS_SHIFT		14
-#define ADC_AVGS_MASK		(0x3 << 14)
+#define ADC_INPUT_CLK_MASK	GENMASK(1, 0)
+#define ADC_CLK_DIV_8		0x03
+#define ADC_CLK_DIV_MASK	GENMASK(6, 5)
+#define ADC_SAMPLE_MODE		BIT(4)
+#define ADC_HARDWARE_TRIGGER	BIT(13)
+#define ADC_AVGS_MASK		GENMASK(15, 14)
 #define SELECT_CHANNEL_4	0x04
 #define SELECT_CHANNEL_1	0x01
-#define DISABLE_CONVERSION_INT	(0x0 << 7)
 
 /* ADC registers */
 #define REG_ADC_HC0		0x00
@@ -65,19 +64,26 @@
 #define REG_TSC_DEBUG_MODE	0x70
 #define REG_TSC_DEBUG_MODE2	0x80
 
+/* TSC_MEASURE_VALUE register field define */
+#define X_VALUE_MASK		GENMASK(27, 16)
+#define Y_VALUE_MASK		GENMASK(11, 0)
+
 /* TSC configuration registers field define */
-#define DETECT_4_WIRE_MODE	(0x0 << 4)
-#define AUTO_MEASURE		0x1
-#define MEASURE_SIGNAL		0x1
-#define DETECT_SIGNAL		(0x1 << 4)
-#define VALID_SIGNAL		(0x1 << 8)
-#define MEASURE_INT_EN		0x1
-#define MEASURE_SIG_EN		0x1
-#define VALID_SIG_EN		(0x1 << 8)
-#define DE_GLITCH_2		(0x2 << 29)
-#define START_SENSE		(0x1 << 12)
-#define TSC_DISABLE		(0x1 << 16)
+#define MEASURE_DELAY_TIME_MASK	GENMASK(31, 8)
+#define DETECT_5_WIRE_MODE	BIT(4)
+#define AUTO_MEASURE		BIT(0)
+#define MEASURE_SIGNAL		BIT(0)
+#define DETECT_SIGNAL		BIT(4)
+#define VALID_SIGNAL		BIT(8)
+#define MEASURE_INT_EN		BIT(0)
+#define MEASURE_SIG_EN		BIT(0)
+#define VALID_SIG_EN		BIT(8)
+#define DE_GLITCH_MASK		GENMASK(30, 29)
+#define DE_GLITCH_2		0x02
+#define START_SENSE		BIT(12)
+#define TSC_DISABLE		BIT(16)
 #define DETECT_MODE		0x2
+#define STATE_MACHINE_MASK	GENMASK(22, 20)
 
 struct imx6ul_tsc {
 	struct device *dev;
@@ -112,19 +118,20 @@ static int imx6ul_adc_init(struct imx6ul_tsc *tsc)
 
 	adc_cfg = readl(tsc->adc_regs + REG_ADC_CFG);
 	adc_cfg &= ~(ADC_CONV_MODE_MASK | ADC_INPUT_CLK_MASK);
-	adc_cfg |= ADC_12BIT_MODE | ADC_IPG_CLK;
-	adc_cfg &= ~(ADC_CLK_DIV_MASK | ADC_SAMPLE_MODE_MASK);
-	adc_cfg |= ADC_CLK_DIV_8 | ADC_SHORT_SAMPLE_MODE;
+	adc_cfg |= FIELD_PREP(ADC_CONV_MODE_MASK, ADC_12BIT_MODE) |
+		FIELD_PREP(ADC_INPUT_CLK_MASK, ADC_IPG_CLK);
+	adc_cfg &= ~(ADC_CLK_DIV_MASK | ADC_SAMPLE_MODE);
+	adc_cfg |= FIELD_PREP(ADC_CLK_DIV_MASK, ADC_CLK_DIV_8);
 	if (tsc->average_enable) {
 		adc_cfg &= ~ADC_AVGS_MASK;
-		adc_cfg |= (tsc->average_select) << ADC_AVGS_SHIFT;
+		adc_cfg |= FIELD_PREP(ADC_AVGS_MASK, tsc->average_select);
 	}
 	adc_cfg &= ~ADC_HARDWARE_TRIGGER;
 	writel(adc_cfg, tsc->adc_regs + REG_ADC_CFG);
 
 	/* enable calibration interrupt */
 	adc_hc |= ADC_AIEN;
-	adc_hc |= ADC_CONV_DISABLE;
+	adc_hc |= FIELD_PREP(ADC_ADCH_MASK, ADC_CONV_DISABLE);
 	writel(adc_hc, tsc->adc_regs + REG_ADC_HC0);
 
 	/* start ADC calibration */
@@ -164,19 +171,21 @@ static void imx6ul_tsc_channel_config(struct imx6ul_tsc *tsc)
 {
 	u32 adc_hc0, adc_hc1, adc_hc2, adc_hc3, adc_hc4;
 
-	adc_hc0 = DISABLE_CONVERSION_INT;
+	adc_hc0 = FIELD_PREP(ADC_AIEN, 0);
 	writel(adc_hc0, tsc->adc_regs + REG_ADC_HC0);
 
-	adc_hc1 = DISABLE_CONVERSION_INT | SELECT_CHANNEL_4;
+	adc_hc1 = FIELD_PREP(ADC_AIEN, 0) |
+		FIELD_PREP(ADC_ADCH_MASK, SELECT_CHANNEL_4);
 	writel(adc_hc1, tsc->adc_regs + REG_ADC_HC1);
 
-	adc_hc2 = DISABLE_CONVERSION_INT;
+	adc_hc2 = FIELD_PREP(ADC_AIEN, 0);
 	writel(adc_hc2, tsc->adc_regs + REG_ADC_HC2);
 
-	adc_hc3 = DISABLE_CONVERSION_INT | SELECT_CHANNEL_1;
+	adc_hc3 = FIELD_PREP(ADC_AIEN, 0) |
+		FIELD_PREP(ADC_ADCH_MASK, SELECT_CHANNEL_1);
 	writel(adc_hc3, tsc->adc_regs + REG_ADC_HC3);
 
-	adc_hc4 = DISABLE_CONVERSION_INT;
+	adc_hc4 = FIELD_PREP(ADC_AIEN, 0);
 	writel(adc_hc4, tsc->adc_regs + REG_ADC_HC4);
 }
 
@@ -188,13 +197,16 @@ static void imx6ul_tsc_channel_config(struct imx6ul_tsc *tsc)
 static void imx6ul_tsc_set(struct imx6ul_tsc *tsc)
 {
 	u32 basic_setting = 0;
+	u32 debug_mode2;
 	u32 start;
 
-	basic_setting |= tsc->measure_delay_time << 8;
-	basic_setting |= DETECT_4_WIRE_MODE | AUTO_MEASURE;
+	basic_setting |= FIELD_PREP(MEASURE_DELAY_TIME_MASK,
+				    tsc->measure_delay_time);
+	basic_setting |= AUTO_MEASURE;
 	writel(basic_setting, tsc->tsc_regs + REG_TSC_BASIC_SETTING);
 
-	writel(DE_GLITCH_2, tsc->tsc_regs + REG_TSC_DEBUG_MODE2);
+	debug_mode2 = FIELD_PREP(DE_GLITCH_MASK, DE_GLITCH_2);
+	writel(debug_mode2, tsc->tsc_regs + REG_TSC_DEBUG_MODE2);
 
 	writel(tsc->pre_charge_time, tsc->tsc_regs + REG_TSC_PRE_CHARGE_TIME);
 	writel(MEASURE_INT_EN, tsc->tsc_regs + REG_TSC_INT_EN);
@@ -250,7 +262,7 @@ static bool tsc_wait_detect_mode(struct imx6ul_tsc *tsc)
 
 		usleep_range(200, 400);
 		debug_mode2 = readl(tsc->tsc_regs + REG_TSC_DEBUG_MODE2);
-		state_machine = (debug_mode2 >> 20) & 0x7;
+		state_machine = FIELD_GET(STATE_MACHINE_MASK, debug_mode2);
 	} while (state_machine != DETECT_MODE);
 
 	usleep_range(200, 400);
@@ -278,8 +290,8 @@ static irqreturn_t tsc_irq_fn(int irq, void *dev_id)
 
 	if (status & MEASURE_SIGNAL) {
 		value = readl(tsc->tsc_regs + REG_TSC_MEASURE_VALUE);
-		x = (value >> 16) & 0x0fff;
-		y = value & 0x0fff;
+		x = FIELD_GET(X_VALUE_MASK, value);
+		y = FIELD_GET(Y_VALUE_MASK, value);
 
 		/*
 		 * In detect mode, we can get the xnur gpio value,
-- 
2.43.0

[PATCH v6 3/6] dt-bindings: touchscreen: add debounce-delay-us property

[Dario Binacchi]

Add support for glitch delay configuration. A detected signal is valid
only if it remains stable longer than the configured delay; otherwise,
it is considered a glitch.

This property was introduced for the i.MX6UL touchscreen controller (TSC),
which provides a hardware deglitch filter with four thresholds depending
on the IPG clock frequency. In this use case, the IPG clock rate is 66 MHz,
resulting in thresholds of 124 µs, 62 µs, 31 µs, and 15 µs, which requires
a property with microsecond-level resolution.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>

---

Changes in v6:
- Rename touchscreen-glitch-threshold-ns to debounce-delay-us.
- Update and improve the commit message

Changes in v5:
- Add Acked-by tag of Conor Dooley

Changes in v2:
- Added in v2.

 .../devicetree/bindings/input/touchscreen/touchscreen.yaml    | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/touchscreen/touchscreen.yaml b/Documentation/devicetree/bindings/input/touchscreen/touchscreen.yaml
index 3e3572aa483a..7023e8c73a7b 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/touchscreen.yaml
+++ b/Documentation/devicetree/bindings/input/touchscreen/touchscreen.yaml
@@ -206,6 +206,10 @@ properties:
 
         unevaluatedProperties: false
 
+  debounce-delay-us:
+    description: Minimum duration in microseconds a signal must remain stable
+      to be considered valid.
+
 dependencies:
   touchscreen-size-x: [ touchscreen-size-y ]
   touchscreen-size-y: [ touchscreen-size-x ]
-- 
2.43.0

[PATCH v6 4/6] dt-bindings: touchscreen: fsl,imx6ul-tsc: support glitch thresold

[Dario Binacchi]

Support the debounce-delay-us property.

Drivers must convert this value to IPG clock cycles and map it to one of
the four discrete thresholds exposed by the TSC_DEBUG_MODE2 register:

  0: 8191 IPG cycles
  1: 4095 IPG cycles
  2: 2047 IPG cycles
  3: 1023 IPG cycles

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>

---

Changes in v6:
- Rename the property to debounce-delay-us.
- Update the commit message

Changes in v4:
- Adjust property description following the suggestions of
  Conor Dooley and Frank Li.
- Update the commit description.

Changes in v3:
- Remove the final part of the description that refers to
  implementation details.

 .../bindings/input/touchscreen/fsl,imx6ul-tsc.yaml | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/touchscreen/fsl,imx6ul-tsc.yaml b/Documentation/devicetree/bindings/input/touchscreen/fsl,imx6ul-tsc.yaml
index 678756ad0f92..a99280aefcbe 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/fsl,imx6ul-tsc.yaml
+++ b/Documentation/devicetree/bindings/input/touchscreen/fsl,imx6ul-tsc.yaml
@@ -62,6 +62,20 @@ properties:
     description: Number of data samples which are averaged for each read.
     enum: [ 1, 4, 8, 16, 32 ]
 
+  debounce-delay-us:
+    description: |
+      Minimum duration in microseconds a signal must remain stable
+      to be considered valid.
+
+      Drivers must convert this value to IPG clock cycles and map
+      it to one of the four discrete thresholds exposed by the
+      TSC_DEBUG_MODE2 register:
+
+        0: 8191 IPG cycles
+        1: 4095 IPG cycles
+        2: 2047 IPG cycles
+        3: 1023 IPG cycles
+
 required:
   - compatible
   - reg
-- 
2.43.0

Re: [PATCH v6 4/6] dt-bindings: touchscreen: fsl,imx6ul-tsc: support glitch thresold

[Conor Dooley]

[-- Attachment #1: Type: text/plain, Size: 52 bytes --]

Acked-by: Conor Dooley <conor.dooley@microchip.com>

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]

[PATCH v6 6/6] Input: imx6ul_tsc - set glitch threshold by DTS property

[Dario Binacchi]

Set the glitch threshold by DTS property and keep the existing default
behavior if the 'debounce-delay-us' is not present.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>

---

Changes in v6:
- Rename the deglitch property from touchscreen-glitch-threshold-ns to
  debounce-delay-us.
- Read the DTS debounce-delay-us instead of touchscreen-glitch-threshold-ns.
- Udpate the cycles calculation.

Changes in v5:
- I didn’t remove patches:
   - 2/6 Input: imx6ul_tsc - use BIT, FIELD_{GET,PREP} and GENMASK macros
   - 1/6 Input: imx6ul_tsc - fix typo in register name
  even though they were accepted, to avoid generating conflicts detected
  by the kernel test robot.
- Re-work the commit message
- Add Reviewed-by tag of Frank Li

Changes in v4:
- Adjust property description fsl,imx6ul-tsc.yaml following the
  suggestions of Conor Dooley and Frank Li.

Changes in v3:
- Remove the final part of the description that refers to
  implementation details in fsl,imx6ul-tsc.yaml.

Changes in v2:
- Replace patch ("dt-bindings: input: touchscreen: fsl,imx6ul-tsc: add
  fsl,glitch-threshold") with ("dt-bindings: touchscreen: add
  touchscreen-glitch-threshold-ns property"), making the previous property
  general by moving it to touchscreen.yaml.
- Rework "Input: imx6ul_tsc - set glitch threshold by DTS property" patch
  to match changes made to the DTS property.
- Move "Input: imx6ul_tsc - use BIT, FIELD_{GET,PREP} and GENMASK macros"
  patch right after the patch fixing the typo.
- Rework to match changes made to the DTS property.

 drivers/input/touchscreen/imx6ul_tsc.c | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/drivers/input/touchscreen/imx6ul_tsc.c b/drivers/input/touchscreen/imx6ul_tsc.c
index e2c59cc7c82c..85f697de2b7e 100644
--- a/drivers/input/touchscreen/imx6ul_tsc.c
+++ b/drivers/input/touchscreen/imx6ul_tsc.c
@@ -79,7 +79,7 @@
 #define MEASURE_SIG_EN		BIT(0)
 #define VALID_SIG_EN		BIT(8)
 #define DE_GLITCH_MASK		GENMASK(30, 29)
-#define DE_GLITCH_2		0x02
+#define DE_GLITCH_DEF		0x02
 #define START_SENSE		BIT(12)
 #define TSC_DISABLE		BIT(16)
 #define DETECT_MODE		0x2
@@ -98,6 +98,7 @@ struct imx6ul_tsc {
 	u32 pre_charge_time;
 	bool average_enable;
 	u32 average_select;
+	u32 de_glitch;
 
 	struct completion completion;
 };
@@ -205,7 +206,7 @@ static void imx6ul_tsc_set(struct imx6ul_tsc *tsc)
 	basic_setting |= AUTO_MEASURE;
 	writel(basic_setting, tsc->tsc_regs + REG_TSC_BASIC_SETTING);
 
-	debug_mode2 = FIELD_PREP(DE_GLITCH_MASK, DE_GLITCH_2);
+	debug_mode2 = FIELD_PREP(DE_GLITCH_MASK, tsc->de_glitch);
 	writel(debug_mode2, tsc->tsc_regs + REG_TSC_DEBUG_MODE2);
 
 	writel(tsc->pre_charge_time, tsc->tsc_regs + REG_TSC_PRE_CHARGE_TIME);
@@ -391,6 +392,7 @@ static int imx6ul_tsc_probe(struct platform_device *pdev)
 	int tsc_irq;
 	int adc_irq;
 	u32 average_samples;
+	u32 de_glitch;
 
 	tsc = devm_kzalloc(&pdev->dev, sizeof(*tsc), GFP_KERNEL);
 	if (!tsc)
@@ -513,6 +515,25 @@ static int imx6ul_tsc_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
+	err = of_property_read_u32(np, "debounce-delay-us", &de_glitch);
+	if (err) {
+		tsc->de_glitch = DE_GLITCH_DEF;
+	} else {
+		u64 cycles;
+		unsigned long rate = clk_get_rate(tsc->tsc_clk);
+
+		cycles = DIV64_U64_ROUND_UP((u64)de_glitch * rate, USEC_PER_SEC);
+
+		if (cycles <= 0x3ff)
+			tsc->de_glitch = 3;
+		else if (cycles <= 0x7ff)
+			tsc->de_glitch = 2;
+		else if (cycles <= 0xfff)
+			tsc->de_glitch = 1;
+		else
+			tsc->de_glitch = 0;
+	}
+
 	err = input_register_device(tsc->input);
 	if (err) {
 		dev_err(&pdev->dev,
-- 
2.43.0

Re: (subset) [PATCH v6 0/6] Input: imx6ul_tsc - set glitch threshold by dts property

[Frank Li]

On Tue, 23 Sep 2025 16:37:31 +0200, Dario Binacchi wrote:
> The series allows setting the glitch threshold for the detected signal
> from a DTS property instead of a hardcoded value.
> In addition, I applied a patch that replaces opencoded masking and
> shifting, with BIT(), GENMASK(), FIELD_GET() and FIELD_PREP() macros.
> 
> I didn’t remove patches:
>  - 2/6 Input: imx6ul_tsc - use BIT, FIELD_{GET,PREP} and GENMASK macros
>  - 1/6 Input: imx6ul_tsc - fix typo in register name
> even though they were accepted, to avoid generating conflicts detected
> by the kernel test robot.
> 
> [...]

Applied, thanks!

[5/6] ARM: dts: imx6ull-engicam-microgea-bmm: set touchscreen glitch threshold
      commit: a96f415ab504484f10673be0d0d9c0e502ca9290

Best regards,
--
Frank Li <Frank.Li@nxp.com>