[PATCH v3 0/3] mfd: mc13xxx: Fixes and enhancements for NXP's mc34708

[PATCH v3 0/3] mfd: mc13xxx: Fixes and enhancements for NXP's mc34708

[Lukasz Majewski]

This patch set provides several enhancements to mc13xxx MFD family
of devices by introducing mc34708 as a separate device.

This IC has dedicated pen detection feature, which allows better
touchscreen experience.

This is the third version of this code (v3).
Discussion regarding v1 can be found here:
https://lkml.org/lkml/2018/4/12/351
https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1661934.html
https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1664296.html

Sascha Hauer (3):
  mfd: mc13xxx: Add mc34708 adc support
  input: touchscreen mc13xxx: Make platform data optional
  input: touchscreen mc13xxx: Add mc34708 support

 drivers/input/touchscreen/mc13783_ts.c |  71 +++++++++++++++++++----
 drivers/mfd/mc13xxx-core.c             | 102 ++++++++++++++++++++++++++++++++-
 drivers/mfd/mc13xxx.h                  |   3 +
 include/linux/mfd/mc34708.h            |  37 ++++++++++++
 4 files changed, 201 insertions(+), 12 deletions(-)
 create mode 100644 include/linux/mfd/mc34708.h

-- 
2.11.0

[PATCH v3 1/3] mfd: mc13xxx: Add mc34708 adc support

[Lukasz Majewski]

From: Sascha Hauer <s.hauer@pengutronix.de>

The mc34708 has an improved adc. The older variants will always convert
a fixed order of channels. The mc34708 can do up to eight conversions
in arbitrary channel order. Currently this extended feature is not
supported. We only support touchscreen conversions now, which will
be sampled in a data format compatible to the older chips in order
to keep the API between the mfd and the touchscreen driver.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Lukasz Majewski <lukma@denx.de>

---
Changes for v3:
- None

Changes for v2:
- Change the return code patch when the mc13xxx ADC is performing conversion
- Introduce new include/linux/mfd/mc34708.h header file for mc34708 specific
  defines

Changes from the original patches:
- ADC conversion functions prototypes added to fix build error
- Adjustments to make checkpatch clean (-ENOSYS, line over 80 char)

This patch applies on top of v5.2 - SHA1: 0ecfebd2b52404ae0c54a878c872bb93363ada36
---
 drivers/mfd/mc13xxx-core.c  | 102 +++++++++++++++++++++++++++++++++++++++++++-
 drivers/mfd/mc13xxx.h       |   3 ++
 include/linux/mfd/mc34708.h |  37 ++++++++++++++++
 3 files changed, 141 insertions(+), 1 deletion(-)
 create mode 100644 include/linux/mfd/mc34708.h

diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c
index 1abe7432aad8..01473d6fda21 100644
--- a/drivers/mfd/mc13xxx-core.c
+++ b/drivers/mfd/mc13xxx-core.c
@@ -12,6 +12,7 @@
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/core.h>
+#include <linux/mfd/mc34708.h>
 
 #include "mc13xxx.h"
 
@@ -45,6 +46,8 @@
 
 #define MC13XXX_ADC2		45
 
+#define MC13XXX_ADC_WORKING		(1 << 0)
+
 void mc13xxx_lock(struct mc13xxx *mc13xxx)
 {
 	if (!mutex_trylock(&mc13xxx->lock)) {
@@ -198,22 +201,30 @@ static void mc34708_print_revision(struct mc13xxx *mc13xxx, u32 revision)
 			maskval(revision, MC34708_REVISION_FAB));
 }
 
+static int mc13xxx_adc_conversion(struct mc13xxx *, unsigned int,
+				  unsigned int, u8, bool, unsigned int *);
+static int mc34708_adc_conversion(struct mc13xxx *, unsigned int,
+				  unsigned int, u8, bool, unsigned int *);
+
 /* These are only exported for mc13xxx-i2c and mc13xxx-spi */
 struct mc13xxx_variant mc13xxx_variant_mc13783 = {
 	.name = "mc13783",
 	.print_revision = mc13xxx_print_revision,
+	.adc_do_conversion = mc13xxx_adc_conversion,
 };
 EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13783);
 
 struct mc13xxx_variant mc13xxx_variant_mc13892 = {
 	.name = "mc13892",
 	.print_revision = mc13xxx_print_revision,
+	.adc_do_conversion = mc13xxx_adc_conversion,
 };
 EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13892);
 
 struct mc13xxx_variant mc13xxx_variant_mc34708 = {
 	.name = "mc34708",
 	.print_revision = mc34708_print_revision,
+	.adc_do_conversion = mc34708_adc_conversion,
 };
 EXPORT_SYMBOL_GPL(mc13xxx_variant_mc34708);
 
@@ -249,7 +260,7 @@ static irqreturn_t mc13xxx_handler_adcdone(int irq, void *data)
 
 #define MC13XXX_ADC_WORKING (1 << 0)
 
-int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode,
+static int mc13xxx_adc_conversion(struct mc13xxx *mc13xxx, unsigned int mode,
 		unsigned int channel, u8 ato, bool atox,
 		unsigned int *sample)
 {
@@ -358,6 +369,95 @@ int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode,
 
 	return ret;
 }
+
+static int mc34708_adc_conversion(struct mc13xxx *mc13xxx, unsigned int mode,
+		unsigned int channel, u8 ato, bool atox,
+		unsigned int *sample)
+{
+	int ret, i;
+	u32 adc0, adc3, adc1, old_adc0;
+	struct mc13xxx_adcdone_data adcdone_data = {
+		.mc13xxx = mc13xxx,
+	};
+
+	switch (mode) {
+	case MC13XXX_ADC_MODE_TS:
+		adc0 = MC34708_ADC0_TSEN | MC34708_ADC0_TSSTART |
+			MC34708_ADC0_TSSTOP(7);
+
+		adc1 = MC34708_ADC1_TSDLY1(0xf) |
+			MC34708_ADC1_TSDLY2(0xf) |
+			MC34708_ADC1_TSDLY3(0xf);
+
+		adc3 = MC34708_ADC3_TSSEL(0, MC34708_TS_X) |
+			MC34708_ADC3_TSSEL(1, MC34708_TS_Y) |
+			MC34708_ADC3_TSSEL(2, MC34708_TS_X) |
+			MC34708_ADC3_TSSEL(3, MC34708_TS_Y) |
+			MC34708_ADC3_TSSEL(4, MC34708_TS_X) |
+			MC34708_ADC3_TSSEL(5, MC34708_TS_R) |
+			MC34708_ADC3_TSSEL(6, MC34708_TS_Y) |
+			MC34708_ADC3_TSSEL(7, MC34708_TS_R);
+		break;
+
+	case MC13XXX_ADC_MODE_SINGLE_CHAN:
+	case MC13XXX_ADC_MODE_MULT_CHAN:
+	default:
+		return -EINVAL;
+	}
+
+	init_completion(&adcdone_data.done);
+
+	mc13xxx_lock(mc13xxx);
+
+	if (mc13xxx->adcflags & MC13XXX_ADC_WORKING) {
+		mc13xxx_unlock(mc13xxx);
+		return -EBUSY;
+	}
+
+	mc13xxx->adcflags |= MC13XXX_ADC_WORKING;
+
+	mc13xxx_reg_read(mc13xxx, MC13XXX_ADC0, &old_adc0);
+
+	mc13xxx_irq_request(mc13xxx, MC34708_IRQ_TSDONE,
+			mc13xxx_handler_adcdone, __func__, &adcdone_data);
+	mc13xxx_irq_ack(mc13xxx, MC34708_IRQ_TSDONE);
+
+	mc13xxx_reg_write(mc13xxx, MC34708_ADC3, adc3);
+	mc13xxx_reg_write(mc13xxx, MC13XXX_ADC1, adc1);
+	mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, adc0);
+
+	mc13xxx_unlock(mc13xxx);
+
+	ret = wait_for_completion_interruptible_timeout(&adcdone_data.done, HZ);
+
+	mc13xxx_lock(mc13xxx);
+
+	mc13xxx_irq_free(mc13xxx, MC34708_IRQ_TSDONE, &adcdone_data);
+
+	if (!ret) {
+		ret = -ETIMEDOUT;
+		goto out;
+	}
+
+	for (i = 0; i < 4; i++)
+		mc13xxx_reg_read(mc13xxx, MC34708_ADC4 + i, &sample[i]);
+
+out:
+	ret = mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, old_adc0);
+
+	mc13xxx->adcflags &= ~MC13XXX_ADC_WORKING;
+	mc13xxx_unlock(mc13xxx);
+
+	return ret;
+}
+
+int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode,
+		unsigned int channel, u8 ato, bool atox,
+		unsigned int *sample)
+{
+	return mc13xxx->variant->adc_do_conversion(mc13xxx, mode, channel, ato,
+			atox, sample);
+}
 EXPORT_SYMBOL_GPL(mc13xxx_adc_do_conversion);
 
 static int mc13xxx_add_subdevice_pdata(struct mc13xxx *mc13xxx,
diff --git a/drivers/mfd/mc13xxx.h b/drivers/mfd/mc13xxx.h
index ce6eec52e8eb..0a79fbb8bcb4 100644
--- a/drivers/mfd/mc13xxx.h
+++ b/drivers/mfd/mc13xxx.h
@@ -19,6 +19,9 @@ struct mc13xxx;
 struct mc13xxx_variant {
 	const char *name;
 	void (*print_revision)(struct mc13xxx *mc13xxx, u32 revision);
+	int (*adc_do_conversion)(struct mc13xxx *mc13xxx, unsigned int mode,
+		unsigned int channel, u8 ato, bool atox,
+		unsigned int *sample);
 };
 
 extern struct mc13xxx_variant
diff --git a/include/linux/mfd/mc34708.h b/include/linux/mfd/mc34708.h
new file mode 100644
index 000000000000..c812104dc53d
--- /dev/null
+++ b/include/linux/mfd/mc34708.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2019
+ * Lukasz Majewski, DENX Software Engineering, lukma@denx.de
+ */
+#ifndef __LINUX_MFD_MC34708_H
+#define __LINUX_MFD_MC34708_H
+
+#define MC34708_ADC3			46
+#define MC34708_ADC4			47
+
+#define MC34708_IRQ_TSDONE		1
+
+#define MC34708_ADC0_TSEN		BIT(12)
+#define MC34708_ADC0_TSSTART		BIT(13)
+#define MC34708_ADC0_TSCONT		BIT(14)
+#define MC34708_ADC0_TSHOLD		BIT(15)
+#define MC34708_ADC0_TSPENDETEN		BIT(20)
+
+#define MC34708_ADC0_TSMASK            (MC34708_ADC0_TSPENDETEN | \
+					MC34708_ADC0_TSEN |       \
+					MC34708_ADC0_TSSTART |    \
+					MC34708_ADC0_TSCONT |     \
+					MC34708_ADC0_TSHOLD)
+
+#define MC34708_ADC0_TSSTOP(x)		(((x) & 0x7) << 16)
+
+#define MC34708_ADC3_TSSEL(step, ch)	((ch) << (8 + 2 * (step)))
+#define MC34708_ADC1_TSDLY1(d)		((d) << 12)
+#define MC34708_ADC1_TSDLY2(d)		((d) << 16)
+#define MC34708_ADC1_TSDLY3(d)		((d) << 20)
+
+#define MC34708_TS_X			1
+#define MC34708_TS_Y			2
+#define MC34708_TS_R			3
+
+#endif /* __LINUX_MFD_MC34708_H */
-- 
2.11.0

[PATCH v3 2/3] input: touchscreen mc13xxx: Make platform data optional

[Lukasz Majewski]

From: Sascha Hauer <s.hauer@pengutronix.de>

The platform data once was optional, make it optional again. This
is a first step towards device tree support for the mc13xxx touchscreen
driver.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Lukasz Majewski <lukma@denx.de>
---
Changes for v3:
- None

Changes for v2:
- None

Changes from the original patch:
- Commit message typo fixes
---
 drivers/input/touchscreen/mc13783_ts.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/input/touchscreen/mc13783_ts.c b/drivers/input/touchscreen/mc13783_ts.c
index ae0d978c83bf..edd49e44e0c9 100644
--- a/drivers/input/touchscreen/mc13783_ts.c
+++ b/drivers/input/touchscreen/mc13783_ts.c
@@ -35,7 +35,8 @@ struct mc13783_ts_priv {
 	struct mc13xxx *mc13xxx;
 	struct delayed_work work;
 	unsigned int sample[4];
-	struct mc13xxx_ts_platform_data *touch;
+	u8 ato;
+	bool atox;
 };
 
 static irqreturn_t mc13783_ts_handler(int irq, void *data)
@@ -125,7 +126,7 @@ static void mc13783_ts_work(struct work_struct *work)
 
 	if (mc13xxx_adc_do_conversion(priv->mc13xxx,
 				mode, channel,
-				priv->touch->ato, priv->touch->atox,
+				priv->ato, priv->atox,
 				priv->sample) == 0)
 		mc13783_ts_report_sample(priv);
 }
@@ -169,6 +170,7 @@ static void mc13783_ts_close(struct input_dev *dev)
 static int __init mc13783_ts_probe(struct platform_device *pdev)
 {
 	struct mc13783_ts_priv *priv;
+	struct mc13xxx_ts_platform_data *pdata = dev_get_platdata(&pdev->dev);
 	struct input_dev *idev;
 	int ret = -ENOMEM;
 
@@ -180,11 +182,10 @@ static int __init mc13783_ts_probe(struct platform_device *pdev)
 	INIT_DELAYED_WORK(&priv->work, mc13783_ts_work);
 	priv->mc13xxx = dev_get_drvdata(pdev->dev.parent);
 	priv->idev = idev;
-	priv->touch = dev_get_platdata(&pdev->dev);
-	if (!priv->touch) {
-		dev_err(&pdev->dev, "missing platform data\n");
-		ret = -ENODEV;
-		goto err_free_mem;
+
+	if (pdata) {
+		priv->atox = pdata->atox;
+		priv->ato = pdata->ato;
 	}
 
 	idev->name = MC13783_TS_NAME;
-- 
2.11.0

[PATCH v3 3/3] input: touchscreen mc13xxx: Add mc34708 support

[Lukasz Majewski]

From: Sascha Hauer <s.hauer@pengutronix.de>

The mc34708 has a different bit to enable pen detection. This
adds the driver data and devtype necessary to probe the device
and to distinguish between the mc13783 and the mc34708.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Lukasz Majewski <lukma@denx.de>

---
Changes for v3:
- Replace forward declaration of mc13xxx_driver_data with
  structure definition
- Rename mc13xxx_driver_data with mc13xxx_chip
- Move static struct mc13xxx_chip mc13783_chip and mc34708_chip
  closer to ID table
- Do not check mc13xxx device type

Changes for v2:
- Change nested if statements to a single one (with cr0 > ...)
- Replace hardcoded max resistance value (4080) with a generic driver data
  value.
- Introduce new include/linux/mfd/mc34708.h header file for mc34708 specific
  defines
- Define as driver data mask and value for accessing mc13xxx registers

Changes from the original patch:
- Simplify the mcXXXXX_set_pen_detection functions
- Fix checkpatch warnings
---
 drivers/input/touchscreen/mc13783_ts.c | 56 +++++++++++++++++++++++++++++++---
 1 file changed, 52 insertions(+), 4 deletions(-)

diff --git a/drivers/input/touchscreen/mc13783_ts.c b/drivers/input/touchscreen/mc13783_ts.c
index edd49e44e0c9..857c11235141 100644
--- a/drivers/input/touchscreen/mc13783_ts.c
+++ b/drivers/input/touchscreen/mc13783_ts.c
@@ -10,6 +10,7 @@
  */
 #include <linux/platform_device.h>
 #include <linux/mfd/mc13783.h>
+#include <linux/mfd/mc34708.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/input.h>
@@ -30,6 +31,18 @@ MODULE_PARM_DESC(sample_tolerance,
 		"is supposed to be wrong and is discarded.  Set to 0 to "
 		"disable this check.");
 
+enum mc13xxx_type {
+	MC13XXX_TYPE_MC13783,
+	MC13XXX_TYPE_MC34708,
+};
+
+struct mc13xxx_chip {
+	enum mc13xxx_type type;
+	int max_resistance;
+	u32 reg_mask;
+	u32 reg_value;
+};
+
 struct mc13783_ts_priv {
 	struct input_dev *idev;
 	struct mc13xxx *mc13xxx;
@@ -37,6 +50,7 @@ struct mc13783_ts_priv {
 	unsigned int sample[4];
 	u8 ato;
 	bool atox;
+	const struct mc13xxx_chip *chip;
 };
 
 static irqreturn_t mc13783_ts_handler(int irq, void *data)
@@ -93,6 +107,9 @@ static void mc13783_ts_report_sample(struct mc13783_ts_priv *priv)
 
 	cr0 = (cr0 + cr1) / 2;
 
+	if (cr0 > priv->chip->max_resistance)
+		cr0 = 0;
+
 	if (!cr0 || !sample_tolerance ||
 			(x2 - x0 < sample_tolerance &&
 			 y2 - y0 < sample_tolerance)) {
@@ -102,14 +119,14 @@ static void mc13783_ts_report_sample(struct mc13783_ts_priv *priv)
 			input_report_abs(idev, ABS_Y, y1);
 
 			dev_dbg(&idev->dev, "report (%d, %d, %d)\n",
-					x1, y1, 0x1000 - cr0);
+				x1, y1, priv->chip->max_resistance - cr0);
 			schedule_delayed_work(&priv->work, HZ / 50);
 		} else {
 			dev_dbg(&idev->dev, "report release\n");
 		}
 
 		input_report_abs(idev, ABS_PRESSURE,
-				cr0 ? 0x1000 - cr0 : cr0);
+				 cr0 ? priv->chip->max_resistance - cr0 : 0);
 		input_report_key(idev, BTN_TOUCH, cr0);
 		input_sync(idev);
 	} else {
@@ -146,7 +163,8 @@ static int mc13783_ts_open(struct input_dev *dev)
 		goto out;
 
 	ret = mc13xxx_reg_rmw(priv->mc13xxx, MC13XXX_ADC0,
-			MC13XXX_ADC0_TSMOD_MASK, MC13XXX_ADC0_TSMOD0);
+			      priv->chip->reg_mask,
+			      priv->chip->reg_value);
 	if (ret)
 		mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_TS, priv);
 out:
@@ -160,7 +178,7 @@ static void mc13783_ts_close(struct input_dev *dev)
 
 	mc13xxx_lock(priv->mc13xxx);
 	mc13xxx_reg_rmw(priv->mc13xxx, MC13XXX_ADC0,
-			MC13XXX_ADC0_TSMOD_MASK, 0);
+			priv->chip->reg_mask, 0);
 	mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_TS, priv);
 	mc13xxx_unlock(priv->mc13xxx);
 
@@ -172,6 +190,7 @@ static int __init mc13783_ts_probe(struct platform_device *pdev)
 	struct mc13783_ts_priv *priv;
 	struct mc13xxx_ts_platform_data *pdata = dev_get_platdata(&pdev->dev);
 	struct input_dev *idev;
+	const struct platform_device_id *id = platform_get_device_id(pdev);
 	int ret = -ENOMEM;
 
 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
@@ -182,6 +201,7 @@ static int __init mc13783_ts_probe(struct platform_device *pdev)
 	INIT_DELAYED_WORK(&priv->work, mc13783_ts_work);
 	priv->mc13xxx = dev_get_drvdata(pdev->dev.parent);
 	priv->idev = idev;
+	priv->chip = (void *)id->driver_data;
 
 	if (pdata) {
 		priv->atox = pdata->atox;
@@ -228,7 +248,35 @@ static int mc13783_ts_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static struct mc13xxx_chip mc13783_chip = {
+	.type = MC13XXX_TYPE_MC13783,
+	.max_resistance = 4096,
+	.reg_mask = MC13XXX_ADC0_TSMOD_MASK,
+	.reg_value = MC13XXX_ADC0_TSMOD0,
+};
+
+static struct mc13xxx_chip mc34708_chip = {
+	.type = MC13XXX_TYPE_MC34708,
+	.max_resistance = 4080,
+	.reg_mask = MC34708_ADC0_TSMASK,
+	.reg_value = MC34708_ADC0_TSPENDETEN,
+};
+
+static const struct platform_device_id mc13xxx_ts_idtable[] = {
+	{
+		.name = "mc13783-ts",
+		.driver_data = (kernel_ulong_t)&mc13783_chip,
+	}, {
+		.name = "mc34708-ts",
+		.driver_data = (kernel_ulong_t)&mc34708_chip,
+	}, {
+		/* sentinel */
+	}
+};
+MODULE_DEVICE_TABLE(platform, mc13xxx_ts_idtable);
+
 static struct platform_driver mc13783_ts_driver = {
+	.id_table	= mc13xxx_ts_idtable,
 	.remove		= mc13783_ts_remove,
 	.driver		= {
 		.name	= MC13783_TS_NAME,
-- 
2.11.0

Re: [PATCH v3 2/3] input: touchscreen mc13xxx: Make platform data optional

[Dmitry Torokhov]

On Wed, Jul 17, 2019 at 12:19:28AM +0200, Lukasz Majewski wrote:
> From: Sascha Hauer <s.hauer@pengutronix.de>
> 
> The platform data once was optional, make it optional again. This
> is a first step towards device tree support for the mc13xxx touchscreen
> driver.
> 
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> Signed-off-by: Lukasz Majewski <lukma@denx.de>

Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

I suppose it will go together with the 1st patch through Lee's MFD tree?

Thanks.

-- 
Dmitry

Re: [PATCH v3 3/3] input: touchscreen mc13xxx: Add mc34708 support

[Dmitry Torokhov]

On Wed, Jul 17, 2019 at 12:19:29AM +0200, Lukasz Majewski wrote:
> From: Sascha Hauer <s.hauer@pengutronix.de>
> 
> The mc34708 has a different bit to enable pen detection. This
> adds the driver data and devtype necessary to probe the device
> and to distinguish between the mc13783 and the mc34708.
> 
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> Signed-off-by: Lukasz Majewski <lukma@denx.de>
> 
> ---
> Changes for v3:
> - Replace forward declaration of mc13xxx_driver_data with
>   structure definition
> - Rename mc13xxx_driver_data with mc13xxx_chip
> - Move static struct mc13xxx_chip mc13783_chip and mc34708_chip
>   closer to ID table
> - Do not check mc13xxx device type

You do not even need to define or store the type. Once it is dropped
please feel free to add

Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

and merge with the other 2 patches.

-- 
Dmitry

Re: [PATCH v3 2/3] input: touchscreen mc13xxx: Make platform data optional

[Lukasz Majewski]

[-- Attachment #1: Type: text/plain, Size: 907 bytes --]

Hi Dmitry,

> On Wed, Jul 17, 2019 at 12:19:28AM +0200, Lukasz Majewski wrote:
> > From: Sascha Hauer <s.hauer@pengutronix.de>
> > 
> > The platform data once was optional, make it optional again. This
> > is a first step towards device tree support for the mc13xxx
> > touchscreen driver.
> > 
> > Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> > Signed-off-by: Lukasz Majewski <lukma@denx.de>  
> 
> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> 
> I suppose it will go together with the 1st patch through Lee's MFD
> tree?

I suppose that this would be the easiest way to proceed.

> 
> Thanks.
> 




Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@denx.de

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Re: [PATCH v3 3/3] input: touchscreen mc13xxx: Add mc34708 support

[Lukasz Majewski]

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Hi Dmitry,

> On Wed, Jul 17, 2019 at 12:19:29AM +0200, Lukasz Majewski wrote:
> > From: Sascha Hauer <s.hauer@pengutronix.de>
> > 
> > The mc34708 has a different bit to enable pen detection. This
> > adds the driver data and devtype necessary to probe the device
> > and to distinguish between the mc13783 and the mc34708.
> > 
> > Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> > Signed-off-by: Lukasz Majewski <lukma@denx.de>
> > 
> > ---
> > Changes for v3:
> > - Replace forward declaration of mc13xxx_driver_data with
> >   structure definition
> > - Rename mc13xxx_driver_data with mc13xxx_chip
> > - Move static struct mc13xxx_chip mc13783_chip and mc34708_chip
> >   closer to ID table
> > - Do not check mc13xxx device type  
> 
> You do not even need to define or store the type. Once it is dropped
> please feel free to add

Ok. I will remove the type definition.

> 
> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> 
> and merge with the other 2 patches.
> 

Ok. I will squash those three patches into a single one, add your
Acked-by and wait for Lee to pull this single patch to his MFD tree.

Thanks for review and help :-).


Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@denx.de

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Re: [PATCH v3 3/3] input: touchscreen mc13xxx: Add mc34708 support

[Dmitry Torokhov]

Hi Lukasz,

On Wed, Jul 17, 2019 at 10:17:04AM +0200, Lukasz Majewski wrote:
> Hi Dmitry,
> 
> > On Wed, Jul 17, 2019 at 12:19:29AM +0200, Lukasz Majewski wrote:
> > > From: Sascha Hauer <s.hauer@pengutronix.de>
> > > 
> > > The mc34708 has a different bit to enable pen detection. This
> > > adds the driver data and devtype necessary to probe the device
> > > and to distinguish between the mc13783 and the mc34708.
> > > 
> > > Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> > > Signed-off-by: Lukasz Majewski <lukma@denx.de>
> > > 
> > > ---
> > > Changes for v3:
> > > - Replace forward declaration of mc13xxx_driver_data with
> > >   structure definition
> > > - Rename mc13xxx_driver_data with mc13xxx_chip
> > > - Move static struct mc13xxx_chip mc13783_chip and mc34708_chip
> > >   closer to ID table
> > > - Do not check mc13xxx device type  
> > 
> > You do not even need to define or store the type. Once it is dropped
> > please feel free to add
> 
> Ok. I will remove the type definition.
> 
> > 
> > Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> > 
> > and merge with the other 2 patches.
> > 
> 
> Ok. I will squash those three patches into a single one, add your
> Acked-by and wait for Lee to pull this single patch to his MFD tree.

Sorry, it looks like there is misunderstanding. I did not ask to squash
together the 3 patches, I meant that they can all go together through
the same tree (MFD). That is what I meant by them being merged together.

Sorry for being unclear.

Thanks.

-- 
Dmitry

Re: [PATCH v3 3/3] input: touchscreen mc13xxx: Add mc34708 support

[Lukasz Majewski]

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Hi Dmitry,

> Hi Lukasz,
> 
> On Wed, Jul 17, 2019 at 10:17:04AM +0200, Lukasz Majewski wrote:
> > Hi Dmitry,
> >   
> > > On Wed, Jul 17, 2019 at 12:19:29AM +0200, Lukasz Majewski wrote:  
> > > > From: Sascha Hauer <s.hauer@pengutronix.de>
> > > > 
> > > > The mc34708 has a different bit to enable pen detection. This
> > > > adds the driver data and devtype necessary to probe the device
> > > > and to distinguish between the mc13783 and the mc34708.
> > > > 
> > > > Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> > > > Signed-off-by: Lukasz Majewski <lukma@denx.de>
> > > > 
> > > > ---
> > > > Changes for v3:
> > > > - Replace forward declaration of mc13xxx_driver_data with
> > > >   structure definition
> > > > - Rename mc13xxx_driver_data with mc13xxx_chip
> > > > - Move static struct mc13xxx_chip mc13783_chip and mc34708_chip
> > > >   closer to ID table
> > > > - Do not check mc13xxx device type    
> > > 
> > > You do not even need to define or store the type. Once it is
> > > dropped please feel free to add  
> > 
> > Ok. I will remove the type definition.
> >   
> > > 
> > > Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> > > 
> > > and merge with the other 2 patches.
> > >   
> > 
> > Ok. I will squash those three patches into a single one, add your
> > Acked-by and wait for Lee to pull this single patch to his MFD
> > tree.  
> 
> Sorry, it looks like there is misunderstanding. I did not ask to
> squash together the 3 patches, I meant that they can all go together
> through the same tree (MFD). That is what I meant by them being
> merged together.
> 

Thanks for the explanation.

> Sorry for being unclear.

No problem - big thanks for very prompt review.

> 
> Thanks.
> 




Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@denx.de

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