* [PATCHv2 0/2] Input: atmel_mxt_ts: Add reset support
@ 2017-07-03 12:38 Sebastian Reichel
2017-07-03 12:38 ` [PATCHv2 1/2] Input: atmel_mxt_ts: Use more managed resources Sebastian Reichel
` (2 more replies)
0 siblings, 3 replies; 8+ messages in thread
From: Sebastian Reichel @ 2017-07-03 12:38 UTC (permalink / raw)
To: Sebastian Reichel, Nick Dyer, Dmitry Torokhov, linux-input
Cc: Henrik Rydberg, Rob Herring, Mark Rutland, devicetree,
linux-kernel, Sebastian Reichel
Hi,
This adds support for the reset pin of Atmel MXT.
Changes since PATCHv1:
- Add new patch preparing for resource managed gpio
- Use resource managed gpio
- Wait for interrupt after reset
-- Sebastian
Sebastian Reichel (2):
Input: atmel_mxt_ts: Use more managed resources
Input: atmel_mxt_ts: Add support for reset line
.../devicetree/bindings/input/atmel,maxtouch.txt | 2 ++
drivers/input/touchscreen/atmel_mxt_ts.c | 42 +++++++++++++++-------
2 files changed, 31 insertions(+), 13 deletions(-)
--
2.13.2
^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCHv2 1/2] Input: atmel_mxt_ts: Use more managed resources
2017-07-03 12:38 [PATCHv2 0/2] Input: atmel_mxt_ts: Add reset support Sebastian Reichel
@ 2017-07-03 12:38 ` Sebastian Reichel
2017-07-03 12:38 ` [PATCHv2 2/2] Input: atmel_mxt_ts: Add support for reset line Sebastian Reichel
2017-07-25 13:56 ` [PATCHv2 0/2] Input: atmel_mxt_ts: Add reset support Sebastian Reichel
2 siblings, 0 replies; 8+ messages in thread
From: Sebastian Reichel @ 2017-07-03 12:38 UTC (permalink / raw)
To: Sebastian Reichel, Nick Dyer, Dmitry Torokhov, linux-input
Cc: Henrik Rydberg, Rob Herring, Mark Rutland, devicetree,
linux-kernel, Sebastian Reichel
Switch mxt_data and interrupt to resource managed allocation methods,
which cleans up the driver slightly and prepares for adding
reset GPIO support.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
---
drivers/input/touchscreen/atmel_mxt_ts.c | 20 +++++++-------------
1 file changed, 7 insertions(+), 13 deletions(-)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index dd042a9b0aaa..9a7b8eba64a6 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -3117,11 +3117,9 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
if (IS_ERR(pdata))
return PTR_ERR(pdata);
- data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
- if (!data) {
- dev_err(&client->dev, "Failed to allocate memory\n");
+ data = devm_kzalloc(&client->dev, sizeof(struct mxt_data), GFP_KERNEL);
+ if (!data)
return -ENOMEM;
- }
snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
client->adapter->nr, client->addr);
@@ -3135,19 +3133,20 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
init_completion(&data->reset_completion);
init_completion(&data->crc_completion);
- error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
+ error = devm_request_threaded_irq(&client->dev, client->irq, NULL,
+ mxt_interrupt,
pdata->irqflags | IRQF_ONESHOT,
client->name, data);
if (error) {
dev_err(&client->dev, "Failed to register interrupt\n");
- goto err_free_mem;
+ return error;
}
disable_irq(client->irq);
error = mxt_initialize(data);
if (error)
- goto err_free_irq;
+ return error;
error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
if (error) {
@@ -3161,10 +3160,6 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
err_free_object:
mxt_free_input_device(data);
mxt_free_object_table(data);
-err_free_irq:
- free_irq(client->irq, data);
-err_free_mem:
- kfree(data);
return error;
}
@@ -3172,11 +3167,10 @@ static int mxt_remove(struct i2c_client *client)
{
struct mxt_data *data = i2c_get_clientdata(client);
+ disable_irq(data->irq);
sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
- free_irq(data->irq, data);
mxt_free_input_device(data);
mxt_free_object_table(data);
- kfree(data);
return 0;
}
--
2.13.2
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCHv2 2/2] Input: atmel_mxt_ts: Add support for reset line
2017-07-03 12:38 [PATCHv2 0/2] Input: atmel_mxt_ts: Add reset support Sebastian Reichel
2017-07-03 12:38 ` [PATCHv2 1/2] Input: atmel_mxt_ts: Use more managed resources Sebastian Reichel
@ 2017-07-03 12:38 ` Sebastian Reichel
2017-07-25 13:56 ` [PATCHv2 0/2] Input: atmel_mxt_ts: Add reset support Sebastian Reichel
2 siblings, 0 replies; 8+ messages in thread
From: Sebastian Reichel @ 2017-07-03 12:38 UTC (permalink / raw)
To: Sebastian Reichel, Nick Dyer, Dmitry Torokhov, linux-input
Cc: Henrik Rydberg, Rob Herring, Mark Rutland, devicetree,
linux-kernel, Sebastian Reichel
Provide support for controlling reset pin. If this is not driven
correctly the device will be held in reset and will not respond.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
---
.../devicetree/bindings/input/atmel,maxtouch.txt | 2 ++
drivers/input/touchscreen/atmel_mxt_ts.c | 22 ++++++++++++++++++++++
2 files changed, 24 insertions(+)
diff --git a/Documentation/devicetree/bindings/input/atmel,maxtouch.txt b/Documentation/devicetree/bindings/input/atmel,maxtouch.txt
index 1852906517ab..23e3abc3fdef 100644
--- a/Documentation/devicetree/bindings/input/atmel,maxtouch.txt
+++ b/Documentation/devicetree/bindings/input/atmel,maxtouch.txt
@@ -22,6 +22,8 @@ Optional properties for main touchpad device:
experiment to determine which bit corresponds to which input. Use
KEY_RESERVED for unused padding values.
+- reset-gpios: GPIO specifier for the touchscreen's reset pin (active low)
+
Example:
touch@4b {
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 9a7b8eba64a6..599f92363188 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -28,6 +28,7 @@
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/slab.h>
+#include <linux/gpio/consumer.h>
#include <asm/unaligned.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
@@ -300,6 +301,7 @@ struct mxt_data {
u8 multitouch;
struct t7_config t7_cfg;
struct mxt_dbg dbg;
+ struct gpio_desc *reset_gpio;
/* Cached parameters from object table */
u16 T5_address;
@@ -3133,6 +3135,14 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
init_completion(&data->reset_completion);
init_completion(&data->crc_completion);
+ data->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(data->reset_gpio)) {
+ error = PTR_ERR(data->reset_gpio);
+ dev_err(&client->dev, "Failed to get reset gpio: %d\n", error);
+ return error;
+ }
+
error = devm_request_threaded_irq(&client->dev, client->irq, NULL,
mxt_interrupt,
pdata->irqflags | IRQF_ONESHOT,
@@ -3142,6 +3152,18 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
return error;
}
+ if (data->reset_gpio) {
+ data->in_bootloader = true;
+ msleep(MXT_RESET_TIME);
+ reinit_completion(&data->bl_completion);
+ gpiod_set_value(data->reset_gpio, 1);
+ error = mxt_wait_for_completion(data, &data->bl_completion,
+ MXT_RESET_TIMEOUT);
+ if (error)
+ return error;
+ data->in_bootloader = false;
+ }
+
disable_irq(client->irq);
error = mxt_initialize(data);
--
2.13.2
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCHv2 0/2] Input: atmel_mxt_ts: Add reset support
2017-07-03 12:38 [PATCHv2 0/2] Input: atmel_mxt_ts: Add reset support Sebastian Reichel
2017-07-03 12:38 ` [PATCHv2 1/2] Input: atmel_mxt_ts: Use more managed resources Sebastian Reichel
2017-07-03 12:38 ` [PATCHv2 2/2] Input: atmel_mxt_ts: Add support for reset line Sebastian Reichel
@ 2017-07-25 13:56 ` Sebastian Reichel
2017-08-21 10:03 ` Sebastian Reichel
2 siblings, 1 reply; 8+ messages in thread
From: Sebastian Reichel @ 2017-07-25 13:56 UTC (permalink / raw)
To: Nick Dyer, Dmitry Torokhov, linux-input
Cc: Henrik Rydberg, Rob Herring, Mark Rutland, devicetree, linux-kernel
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Hi Dmitry,
Gentle ping on this one. This helps to remove a hack from the
Droid 4 DT and will also be used by PPD, which is currently
being upstreamed:
https://lkml.org/lkml/2017/7/19/898
-- Sebastian
On Mon, Jul 03, 2017 at 02:38:41PM +0200, Sebastian Reichel wrote:
> Hi,
>
> This adds support for the reset pin of Atmel MXT.
>
> Changes since PATCHv1:
> - Add new patch preparing for resource managed gpio
> - Use resource managed gpio
> - Wait for interrupt after reset
>
> -- Sebastian
>
> Sebastian Reichel (2):
> Input: atmel_mxt_ts: Use more managed resources
> Input: atmel_mxt_ts: Add support for reset line
>
> .../devicetree/bindings/input/atmel,maxtouch.txt | 2 ++
> drivers/input/touchscreen/atmel_mxt_ts.c | 42 +++++++++++++++-------
> 2 files changed, 31 insertions(+), 13 deletions(-)
>
> --
> 2.13.2
>
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCHv2 0/2] Input: atmel_mxt_ts: Add reset support
2017-07-25 13:56 ` [PATCHv2 0/2] Input: atmel_mxt_ts: Add reset support Sebastian Reichel
@ 2017-08-21 10:03 ` Sebastian Reichel
2017-09-04 9:02 ` Sebastian Reichel
0 siblings, 1 reply; 8+ messages in thread
From: Sebastian Reichel @ 2017-08-21 10:03 UTC (permalink / raw)
To: Nick Dyer, Dmitry Torokhov, linux-input
Cc: Henrik Rydberg, Rob Herring, Mark Rutland, devicetree, linux-kernel
[-- Attachment #1: Type: text/plain, Size: 1057 bytes --]
Hi,
ping?
-- Sebastian
On Tue, Jul 25, 2017 at 03:56:56PM +0200, Sebastian Reichel wrote:
> Hi Dmitry,
>
> Gentle ping on this one. This helps to remove a hack from the
> Droid 4 DT and will also be used by PPD, which is currently
> being upstreamed:
>
> https://lkml.org/lkml/2017/7/19/898
>
> -- Sebastian
>
> On Mon, Jul 03, 2017 at 02:38:41PM +0200, Sebastian Reichel wrote:
> > Hi,
> >
> > This adds support for the reset pin of Atmel MXT.
> >
> > Changes since PATCHv1:
> > - Add new patch preparing for resource managed gpio
> > - Use resource managed gpio
> > - Wait for interrupt after reset
> >
> > -- Sebastian
> >
> > Sebastian Reichel (2):
> > Input: atmel_mxt_ts: Use more managed resources
> > Input: atmel_mxt_ts: Add support for reset line
> >
> > .../devicetree/bindings/input/atmel,maxtouch.txt | 2 ++
> > drivers/input/touchscreen/atmel_mxt_ts.c | 42 +++++++++++++++-------
> > 2 files changed, 31 insertions(+), 13 deletions(-)
> >
> > --
> > 2.13.2
> >
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCHv2 0/2] Input: atmel_mxt_ts: Add reset support
2017-08-21 10:03 ` Sebastian Reichel
@ 2017-09-04 9:02 ` Sebastian Reichel
2017-09-04 16:17 ` Dmitry Torokhov
0 siblings, 1 reply; 8+ messages in thread
From: Sebastian Reichel @ 2017-09-04 9:02 UTC (permalink / raw)
To: Dmitry Torokhov; +Cc: Henrik Rydberg, linux-kernel, linux-input, Nick Dyer
[-- Attachment #1: Type: text/plain, Size: 1308 bytes --]
Hi,
Another two weeks, another ping. Is everything allright with Dmitry?
-- Sebastian
On Mon, Aug 21, 2017 at 12:03:51PM +0200, Sebastian Reichel wrote:
> Hi,
>
> ping?
>
> -- Sebastian
>
> On Tue, Jul 25, 2017 at 03:56:56PM +0200, Sebastian Reichel wrote:
> > Hi Dmitry,
> >
> > Gentle ping on this one. This helps to remove a hack from the
> > Droid 4 DT and will also be used by PPD, which is currently
> > being upstreamed:
> >
> > https://lkml.org/lkml/2017/7/19/898
> >
> > -- Sebastian
> >
> > On Mon, Jul 03, 2017 at 02:38:41PM +0200, Sebastian Reichel wrote:
> > > Hi,
> > >
> > > This adds support for the reset pin of Atmel MXT.
> > >
> > > Changes since PATCHv1:
> > > - Add new patch preparing for resource managed gpio
> > > - Use resource managed gpio
> > > - Wait for interrupt after reset
> > >
> > > -- Sebastian
> > >
> > > Sebastian Reichel (2):
> > > Input: atmel_mxt_ts: Use more managed resources
> > > Input: atmel_mxt_ts: Add support for reset line
> > >
> > > .../devicetree/bindings/input/atmel,maxtouch.txt | 2 ++
> > > drivers/input/touchscreen/atmel_mxt_ts.c | 42 +++++++++++++++-------
> > > 2 files changed, 31 insertions(+), 13 deletions(-)
> > >
> > > --
> > > 2.13.2
> > >
>
>
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCHv2 0/2] Input: atmel_mxt_ts: Add reset support
2017-09-04 9:02 ` Sebastian Reichel
@ 2017-09-04 16:17 ` Dmitry Torokhov
2017-09-04 17:51 ` Sebastian Reichel
0 siblings, 1 reply; 8+ messages in thread
From: Dmitry Torokhov @ 2017-09-04 16:17 UTC (permalink / raw)
To: Sebastian Reichel; +Cc: Henrik Rydberg, linux-kernel, linux-input, Nick Dyer
Hi Sebastian,
On Mon, Sep 04, 2017 at 11:02:33AM +0200, Sebastian Reichel wrote:
> Hi,
>
> Another two weeks, another ping. Is everything allright with Dmitry?
Sorry, I apparently forgot to sent out a notice that I applied the 2
patches, but they have been in my tree for the last 2 weeks and will get
into the next pull request for 4.14:
https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git/commit/?h=next&id=f657b00df22e231da217ca0162a75db452475e8f
Thanks.
--
Dmitry
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCHv2 0/2] Input: atmel_mxt_ts: Add reset support
2017-09-04 16:17 ` Dmitry Torokhov
@ 2017-09-04 17:51 ` Sebastian Reichel
0 siblings, 0 replies; 8+ messages in thread
From: Sebastian Reichel @ 2017-09-04 17:51 UTC (permalink / raw)
To: Dmitry Torokhov; +Cc: Henrik Rydberg, linux-kernel, linux-input, Nick Dyer
[-- Attachment #1: Type: text/plain, Size: 605 bytes --]
Hi Dmitry,
On Mon, Sep 04, 2017 at 09:17:09AM -0700, Dmitry Torokhov wrote:
> On Mon, Sep 04, 2017 at 11:02:33AM +0200, Sebastian Reichel wrote:
> > Another two weeks, another ping. Is everything allright with Dmitry?
>
> Sorry, I apparently forgot to sent out a notice that I applied the 2
> patches, but they have been in my tree for the last 2 weeks and will get
> into the next pull request for 4.14:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git/commit/?h=next&id=f657b00df22e231da217ca0162a75db452475e8f
ok, should have checked first. Thanks :)
-- Sebastian
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^ permalink raw reply [flat|nested] 8+ messages in thread
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2017-07-03 12:38 [PATCHv2 0/2] Input: atmel_mxt_ts: Add reset support Sebastian Reichel
2017-07-03 12:38 ` [PATCHv2 1/2] Input: atmel_mxt_ts: Use more managed resources Sebastian Reichel
2017-07-03 12:38 ` [PATCHv2 2/2] Input: atmel_mxt_ts: Add support for reset line Sebastian Reichel
2017-07-25 13:56 ` [PATCHv2 0/2] Input: atmel_mxt_ts: Add reset support Sebastian Reichel
2017-08-21 10:03 ` Sebastian Reichel
2017-09-04 9:02 ` Sebastian Reichel
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2017-09-04 17:51 ` Sebastian Reichel
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