[PATCH 0/5] AM437x SK: Add power-button support

[PATCH 0/5] AM437x SK: Add power-button support

[Felipe Balbi]

Hi,

the following patches add tps65218 power button support and
make it usable with AM437x SK.

Developed and tested on top of v3.19-rc1. Logs at [1]

[1] http://hastebin.com/ecopenuqot

Felipe Balbi (5):
  mfd: tps65218: make INT[12] and STATUS registers volatile
  mfd: tps65218: make INT1 our status_base register
  input: misc: add tps65218 power button driver
  arm: boot: dts: am437x-sk: add power button binding
  arm: omap2plus_defconfig: enable TPS65218 power button

 arch/arm/boot/dts/am437x-sk-evm.dts     |   5 ++
 arch/arm/configs/omap2plus_defconfig    |   1 +
 drivers/input/misc/Kconfig              |  10 +++
 drivers/input/misc/Makefile             |   1 +
 drivers/input/misc/tps65218-pwrbutton.c | 135 ++++++++++++++++++++++++++++++++
 drivers/mfd/tps65218.c                  |  12 +++
 6 files changed, 164 insertions(+)
 create mode 100644 drivers/input/misc/tps65218-pwrbutton.c

-- 
2.2.0

[PATCH 1/5] mfd: tps65218: make INT[12] and STATUS registers volatile

[Felipe Balbi]

STATUS register can be modified by the HW, so we
should bypass cache because of that.

In the case of INT[12] registers, they are the ones
that actually clear the IRQ source at the time they
are read. If we rely on the cache for them, we will
never be able to clear the interrupt, which will cause
our IRQ line to be disabled due to IRQ throttling.

Fixes: 44b4dc6 mfd: tps65218: Add driver for the TPS65218 PMIC
Cc: <stable@vger.kernel.org> # v3.15+
Cc: Keerthy <j-keerthy@ti.com>
Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---
 drivers/mfd/tps65218.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/mfd/tps65218.c b/drivers/mfd/tps65218.c
index 0d256cb..2243f75 100644
--- a/drivers/mfd/tps65218.c
+++ b/drivers/mfd/tps65218.c
@@ -125,10 +125,21 @@ int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg,
 }
 EXPORT_SYMBOL_GPL(tps65218_clear_bits);
 
+static const struct regmap_range tps65218_yes_ranges[] = {
+	regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2),
+	regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS),
+};
+
+static const struct regmap_access_table tps65218_volatile_table = {
+	.yes_ranges = tps65218_yes_ranges,
+	.n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges),
+};
+
 static struct regmap_config tps65218_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
 	.cache_type = REGCACHE_RBTREE,
+	.volatile_table = &tps65218_volatile_table,
 };
 
 static const struct regmap_irq tps65218_irqs[] = {
-- 
2.2.0

[PATCH 1/5] mfd: tps65218: make INT[12] and STATUS registers volatile

[Felipe Balbi]

On Fri, Dec 26, 2014 at 01:28:20PM -0600, Felipe Balbi wrote:
> STATUS register can be modified by the HW, so we
> should bypass cache because of that.
> 
> In the case of INT[12] registers, they are the ones
> that actually clear the IRQ source at the time they
> are read. If we rely on the cache for them, we will
> never be able to clear the interrupt, which will cause
> our IRQ line to be disabled due to IRQ throttling.
> 
> Fixes: 44b4dc6 mfd: tps65218: Add driver for the TPS65218 PMIC
> Cc: <stable@vger.kernel.org> # v3.15+
> Cc: Keerthy <j-keerthy@ti.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Signed-off-by: Felipe Balbi <balbi@ti.com>

ping

> ---
>  drivers/mfd/tps65218.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/drivers/mfd/tps65218.c b/drivers/mfd/tps65218.c
> index 0d256cb..2243f75 100644
> --- a/drivers/mfd/tps65218.c
> +++ b/drivers/mfd/tps65218.c
> @@ -125,10 +125,21 @@ int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg,
>  }
>  EXPORT_SYMBOL_GPL(tps65218_clear_bits);
>  
> +static const struct regmap_range tps65218_yes_ranges[] = {
> +	regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2),
> +	regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS),
> +};
> +
> +static const struct regmap_access_table tps65218_volatile_table = {
> +	.yes_ranges = tps65218_yes_ranges,
> +	.n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges),
> +};
> +
>  static struct regmap_config tps65218_regmap_config = {
>  	.reg_bits = 8,
>  	.val_bits = 8,
>  	.cache_type = REGCACHE_RBTREE,
> +	.volatile_table = &tps65218_volatile_table,
>  };
>  
>  static const struct regmap_irq tps65218_irqs[] = {
> -- 
> 2.2.0
> 

-- 
balbi
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[PATCH 1/5] mfd: tps65218: make INT[12] and STATUS registers volatile

[Felipe Balbi]

On Tue, Jan 06, 2015 at 11:37:34AM -0600, Felipe Balbi wrote:
> On Fri, Dec 26, 2014 at 01:28:20PM -0600, Felipe Balbi wrote:
> > STATUS register can be modified by the HW, so we
> > should bypass cache because of that.
> > 
> > In the case of INT[12] registers, they are the ones
> > that actually clear the IRQ source at the time they
> > are read. If we rely on the cache for them, we will
> > never be able to clear the interrupt, which will cause
> > our IRQ line to be disabled due to IRQ throttling.
> > 
> > Fixes: 44b4dc6 mfd: tps65218: Add driver for the TPS65218 PMIC
> > Cc: <stable@vger.kernel.org> # v3.15+
> > Cc: Keerthy <j-keerthy@ti.com>
> > Cc: Lee Jones <lee.jones@linaro.org>
> > Signed-off-by: Felipe Balbi <balbi@ti.com>
> 
> ping

another ping. Without this and the following patch TPS65218 power button
driver which was already applied by Dmitry, won't work.

> > ---
> >  drivers/mfd/tps65218.c | 11 +++++++++++
> >  1 file changed, 11 insertions(+)
> > 
> > diff --git a/drivers/mfd/tps65218.c b/drivers/mfd/tps65218.c
> > index 0d256cb..2243f75 100644
> > --- a/drivers/mfd/tps65218.c
> > +++ b/drivers/mfd/tps65218.c
> > @@ -125,10 +125,21 @@ int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg,
> >  }
> >  EXPORT_SYMBOL_GPL(tps65218_clear_bits);
> >  
> > +static const struct regmap_range tps65218_yes_ranges[] = {
> > +	regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2),
> > +	regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS),
> > +};
> > +
> > +static const struct regmap_access_table tps65218_volatile_table = {
> > +	.yes_ranges = tps65218_yes_ranges,
> > +	.n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges),
> > +};
> > +
> >  static struct regmap_config tps65218_regmap_config = {
> >  	.reg_bits = 8,
> >  	.val_bits = 8,
> >  	.cache_type = REGCACHE_RBTREE,
> > +	.volatile_table = &tps65218_volatile_table,
> >  };
> >  
> >  static const struct regmap_irq tps65218_irqs[] = {
> > -- 
> > 2.2.0
> > 
> 
> -- 
> balbi



-- 
balbi
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[PATCH 1/5] mfd: tps65218: make INT[12] and STATUS registers volatile

[Felipe Balbi]

Hi,

On Thu, Jan 08, 2015 at 10:25:12AM -0600, Felipe Balbi wrote:
> On Tue, Jan 06, 2015 at 11:37:34AM -0600, Felipe Balbi wrote:
> > On Fri, Dec 26, 2014 at 01:28:20PM -0600, Felipe Balbi wrote:
> > > STATUS register can be modified by the HW, so we
> > > should bypass cache because of that.
> > > 
> > > In the case of INT[12] registers, they are the ones
> > > that actually clear the IRQ source at the time they
> > > are read. If we rely on the cache for them, we will
> > > never be able to clear the interrupt, which will cause
> > > our IRQ line to be disabled due to IRQ throttling.
> > > 
> > > Fixes: 44b4dc6 mfd: tps65218: Add driver for the TPS65218 PMIC
> > > Cc: <stable@vger.kernel.org> # v3.15+
> > > Cc: Keerthy <j-keerthy@ti.com>
> > > Cc: Lee Jones <lee.jones@linaro.org>
> > > Signed-off-by: Felipe Balbi <balbi@ti.com>
> > 
> > ping
> 
> another ping. Without this and the following patch TPS65218 power button
> driver which was already applied by Dmitry, won't work.

Anybody ? -rc4 is out and tps65218 is still broken because nobody has
acted on these two patches. All other patches which are meant for 3.20
merge window are applied and because of these pending, those patches
won't work.

> > > ---
> > >  drivers/mfd/tps65218.c | 11 +++++++++++
> > >  1 file changed, 11 insertions(+)
> > > 
> > > diff --git a/drivers/mfd/tps65218.c b/drivers/mfd/tps65218.c
> > > index 0d256cb..2243f75 100644
> > > --- a/drivers/mfd/tps65218.c
> > > +++ b/drivers/mfd/tps65218.c
> > > @@ -125,10 +125,21 @@ int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg,
> > >  }
> > >  EXPORT_SYMBOL_GPL(tps65218_clear_bits);
> > >  
> > > +static const struct regmap_range tps65218_yes_ranges[] = {
> > > +	regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2),
> > > +	regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS),
> > > +};
> > > +
> > > +static const struct regmap_access_table tps65218_volatile_table = {
> > > +	.yes_ranges = tps65218_yes_ranges,
> > > +	.n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges),
> > > +};
> > > +
> > >  static struct regmap_config tps65218_regmap_config = {
> > >  	.reg_bits = 8,
> > >  	.val_bits = 8,
> > >  	.cache_type = REGCACHE_RBTREE,
> > > +	.volatile_table = &tps65218_volatile_table,
> > >  };
> > >  
> > >  static const struct regmap_irq tps65218_irqs[] = {
> > > -- 
> > > 2.2.0
> > > 
> > 
> > -- 
> > balbi
> 
> 
> 
> -- 
> balbi



-- 
balbi
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[PATCH 1/5] mfd: tps65218: make INT[12] and STATUS registers volatile

[Tony Lindgren]

* Felipe Balbi <balbi@ti.com> [150112 08:50]:
> Hi,
> 
> On Thu, Jan 08, 2015 at 10:25:12AM -0600, Felipe Balbi wrote:
> > On Tue, Jan 06, 2015 at 11:37:34AM -0600, Felipe Balbi wrote:
> > > On Fri, Dec 26, 2014 at 01:28:20PM -0600, Felipe Balbi wrote:
> > > > STATUS register can be modified by the HW, so we
> > > > should bypass cache because of that.
> > > > 
> > > > In the case of INT[12] registers, they are the ones
> > > > that actually clear the IRQ source at the time they
> > > > are read. If we rely on the cache for them, we will
> > > > never be able to clear the interrupt, which will cause
> > > > our IRQ line to be disabled due to IRQ throttling.
> > > > 
> > > > Fixes: 44b4dc6 mfd: tps65218: Add driver for the TPS65218 PMIC
> > > > Cc: <stable@vger.kernel.org> # v3.15+
> > > > Cc: Keerthy <j-keerthy@ti.com>
> > > > Cc: Lee Jones <lee.jones@linaro.org>
> > > > Signed-off-by: Felipe Balbi <balbi@ti.com>
> > > 
> > > ping
> > 
> > another ping. Without this and the following patch TPS65218 power button
> > driver which was already applied by Dmitry, won't work.
> 
> Anybody ? -rc4 is out and tps65218 is still broken because nobody has
> acted on these two patches. All other patches which are meant for 3.20
> merge window are applied and because of these pending, those patches
> won't work.

Lee, are you planning to pick these two drivers/mfd patches?

Regards,

Tony

[PATCH 1/5] mfd: tps65218: make INT[12] and STATUS registers volatile

[Felipe Balbi]

Hi,

On Wed, Jan 14, 2015 at 09:07:17AM -0800, Tony Lindgren wrote:
> > > > > STATUS register can be modified by the HW, so we
> > > > > should bypass cache because of that.
> > > > > 
> > > > > In the case of INT[12] registers, they are the ones
> > > > > that actually clear the IRQ source at the time they
> > > > > are read. If we rely on the cache for them, we will
> > > > > never be able to clear the interrupt, which will cause
> > > > > our IRQ line to be disabled due to IRQ throttling.
> > > > > 
> > > > > Fixes: 44b4dc6 mfd: tps65218: Add driver for the TPS65218 PMIC
> > > > > Cc: <stable@vger.kernel.org> # v3.15+
> > > > > Cc: Keerthy <j-keerthy@ti.com>
> > > > > Cc: Lee Jones <lee.jones@linaro.org>
> > > > > Signed-off-by: Felipe Balbi <balbi@ti.com>
> > > > 
> > > > ping
> > > 
> > > another ping. Without this and the following patch TPS65218 power button
> > > driver which was already applied by Dmitry, won't work.
> > 
> > Anybody ? -rc4 is out and tps65218 is still broken because nobody has
> > acted on these two patches. All other patches which are meant for 3.20
> > merge window are applied and because of these pending, those patches
> > won't work.
> 
> Lee, are you planning to pick these two drivers/mfd patches?

Samuel, Lee, is someone planning on picking these two patches up ?
v3.19 remains broken.

-- 
balbi
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[PATCH 1/5] mfd: tps65218: make INT[12] and STATUS registers volatile

[Lee Jones]

On Fri, 26 Dec 2014, Felipe Balbi wrote:

> STATUS register can be modified by the HW, so we
> should bypass cache because of that.
> 
> In the case of INT[12] registers, they are the ones
> that actually clear the IRQ source at the time they
> are read. If we rely on the cache for them, we will
> never be able to clear the interrupt, which will cause
> our IRQ line to be disabled due to IRQ throttling.
> 
> Fixes: 44b4dc6 mfd: tps65218: Add driver for the TPS65218 PMIC
> Cc: <stable@vger.kernel.org> # v3.15+
> Cc: Keerthy <j-keerthy@ti.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Signed-off-by: Felipe Balbi <balbi@ti.com>
> ---
>  drivers/mfd/tps65218.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)

Sorry for the delay.  It's difficult to get a WiFi signal 2000m up in
an Austrian mountain. :)

Applied now, thanks.

> diff --git a/drivers/mfd/tps65218.c b/drivers/mfd/tps65218.c
> index 0d256cb..2243f75 100644
> --- a/drivers/mfd/tps65218.c
> +++ b/drivers/mfd/tps65218.c
> @@ -125,10 +125,21 @@ int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg,
>  }
>  EXPORT_SYMBOL_GPL(tps65218_clear_bits);
>  
> +static const struct regmap_range tps65218_yes_ranges[] = {
> +	regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2),
> +	regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS),
> +};
> +
> +static const struct regmap_access_table tps65218_volatile_table = {
> +	.yes_ranges = tps65218_yes_ranges,
> +	.n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges),
> +};
> +
>  static struct regmap_config tps65218_regmap_config = {
>  	.reg_bits = 8,
>  	.val_bits = 8,
>  	.cache_type = REGCACHE_RBTREE,
> +	.volatile_table = &tps65218_volatile_table,
>  };
>  
>  static const struct regmap_irq tps65218_irqs[] = {

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[PATCH 1/5] mfd: tps65218: make INT[12] and STATUS registers volatile

[Felipe Balbi]

On Sun, Jan 18, 2015 at 09:52:14AM +0000, Lee Jones wrote:
> On Fri, 26 Dec 2014, Felipe Balbi wrote:
> 
> > STATUS register can be modified by the HW, so we
> > should bypass cache because of that.
> > 
> > In the case of INT[12] registers, they are the ones
> > that actually clear the IRQ source at the time they
> > are read. If we rely on the cache for them, we will
> > never be able to clear the interrupt, which will cause
> > our IRQ line to be disabled due to IRQ throttling.
> > 
> > Fixes: 44b4dc6 mfd: tps65218: Add driver for the TPS65218 PMIC
> > Cc: <stable@vger.kernel.org> # v3.15+
> > Cc: Keerthy <j-keerthy@ti.com>
> > Cc: Lee Jones <lee.jones@linaro.org>
> > Signed-off-by: Felipe Balbi <balbi@ti.com>
> > ---
> >  drivers/mfd/tps65218.c | 11 +++++++++++
> >  1 file changed, 11 insertions(+)
> 
> Sorry for the delay.  It's difficult to get a WiFi signal 2000m up in
> an Austrian mountain. :)

now you're just making excuses ;-)

> Applied now, thanks.

thanks :-)

-- 
balbi
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[PATCH 2/5] mfd: tps65218: make INT1 our status_base register

[Felipe Balbi]

If we don't tell regmap-irq that our first status
register is at offset 1, it will try to read offset
zero, which is the chipid register.

Fixes: 44b4dc6 mfd: tps65218: Add driver for the TPS65218 PMIC
Cc: <stable@vger.kernel.org> # v3.15+
Cc: Keerthy <j-keerthy@ti.com>
Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---
 drivers/mfd/tps65218.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mfd/tps65218.c b/drivers/mfd/tps65218.c
index 2243f75..d6b7643 100644
--- a/drivers/mfd/tps65218.c
+++ b/drivers/mfd/tps65218.c
@@ -204,6 +204,7 @@ static struct regmap_irq_chip tps65218_irq_chip = {
 
 	.num_regs = 2,
 	.mask_base = TPS65218_REG_INT_MASK1,
+	.status_base = TPS65218_REG_INT1,
 };
 
 static const struct of_device_id of_tps65218_match_table[] = {
-- 
2.2.0

[PATCH 2/5] mfd: tps65218: make INT1 our status_base register

[Felipe Balbi]

On Fri, Dec 26, 2014 at 01:28:21PM -0600, Felipe Balbi wrote:
> If we don't tell regmap-irq that our first status
> register is at offset 1, it will try to read offset
> zero, which is the chipid register.
> 
> Fixes: 44b4dc6 mfd: tps65218: Add driver for the TPS65218 PMIC
> Cc: <stable@vger.kernel.org> # v3.15+
> Cc: Keerthy <j-keerthy@ti.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Signed-off-by: Felipe Balbi <balbi@ti.com>

ping

> ---
>  drivers/mfd/tps65218.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/mfd/tps65218.c b/drivers/mfd/tps65218.c
> index 2243f75..d6b7643 100644
> --- a/drivers/mfd/tps65218.c
> +++ b/drivers/mfd/tps65218.c
> @@ -204,6 +204,7 @@ static struct regmap_irq_chip tps65218_irq_chip = {
>  
>  	.num_regs = 2,
>  	.mask_base = TPS65218_REG_INT_MASK1,
> +	.status_base = TPS65218_REG_INT1,
>  };
>  
>  static const struct of_device_id of_tps65218_match_table[] = {
> -- 
> 2.2.0
> 

-- 
balbi
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[PATCH 2/5] mfd: tps65218: make INT1 our status_base register

[Lee Jones]

On Fri, 26 Dec 2014, Felipe Balbi wrote:

> If we don't tell regmap-irq that our first status
> register is at offset 1, it will try to read offset
> zero, which is the chipid register.
> 
> Fixes: 44b4dc6 mfd: tps65218: Add driver for the TPS65218 PMIC
> Cc: <stable@vger.kernel.org> # v3.15+
> Cc: Keerthy <j-keerthy@ti.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Signed-off-by: Felipe Balbi <balbi@ti.com>
> ---
>  drivers/mfd/tps65218.c | 1 +
>  1 file changed, 1 insertion(+)

Sorry for the delay.  It's difficult to get a WiFi signal 2000m up in
an Austrian mountain. :)

Applied now, thanks.

> diff --git a/drivers/mfd/tps65218.c b/drivers/mfd/tps65218.c
> index 2243f75..d6b7643 100644
> --- a/drivers/mfd/tps65218.c
> +++ b/drivers/mfd/tps65218.c
> @@ -204,6 +204,7 @@ static struct regmap_irq_chip tps65218_irq_chip = {
>  
>  	.num_regs = 2,
>  	.mask_base = TPS65218_REG_INT_MASK1,
> +	.status_base = TPS65218_REG_INT1,
>  };
>  
>  static const struct of_device_id of_tps65218_match_table[] = {

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[PATCH 3/5] input: misc: add tps65218 power button driver

[Felipe Balbi]

With this driver, we can report KEY_POWER on
AM437x SK. This patch has been tested with said
board.

Signed-off-by: Felipe Balbi <balbi@ti.com>
---
 drivers/input/misc/Kconfig              |  10 +++
 drivers/input/misc/Makefile             |   1 +
 drivers/input/misc/tps65218-pwrbutton.c | 135 ++++++++++++++++++++++++++++++++
 3 files changed, 146 insertions(+)
 create mode 100644 drivers/input/misc/tps65218-pwrbutton.c

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 23297ab..364cfb8 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -404,6 +404,16 @@ config INPUT_RETU_PWRBUTTON
 	  To compile this driver as a module, choose M here. The module will
 	  be called retu-pwrbutton.
 
+config INPUT_TPS65218_PWRBUTTON
+	tristate "TPS65218 Power button driver"
+	depends on MFD_TPS65218
+	help
+	  Say Y here if you want to enable power buttong reporting for
+	  the TPS65218 Power Management IC device.
+
+	  To compile this driver as a module, choose M here. The module will
+	  be called tps65218-pwrbutton.
+
 config INPUT_TWL4030_PWRBUTTON
 	tristate "TWL4030 Power button Driver"
 	depends on TWL4030_CORE
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 19c7603..a923753 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -59,6 +59,7 @@ obj-$(CONFIG_INPUT_SGI_BTNS)		+= sgi_btns.o
 obj-$(CONFIG_INPUT_SIRFSOC_ONKEY)	+= sirfsoc-onkey.o
 obj-$(CONFIG_INPUT_SOC_BUTTON_ARRAY)	+= soc_button_array.o
 obj-$(CONFIG_INPUT_SPARCSPKR)		+= sparcspkr.o
+obj-$(CONFIG_INPUT_TPS65218_PWRBUTTON)	+= tps65218-pwrbutton.o
 obj-$(CONFIG_INPUT_TWL4030_PWRBUTTON)	+= twl4030-pwrbutton.o
 obj-$(CONFIG_INPUT_TWL4030_VIBRA)	+= twl4030-vibra.o
 obj-$(CONFIG_INPUT_TWL6040_VIBRA)	+= twl6040-vibra.o
diff --git a/drivers/input/misc/tps65218-pwrbutton.c b/drivers/input/misc/tps65218-pwrbutton.c
new file mode 100644
index 0000000..a1f8a19
--- /dev/null
+++ b/drivers/input/misc/tps65218-pwrbutton.c
@@ -0,0 +1,135 @@
+/*
+ * Texas Instruments' TPS65218 Power Button Input Driver
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
+ * Author: Felipe Balbi <balbi@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/tps65218.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+struct tps65218_pwrbutton {
+	struct device *dev;
+	struct tps65218 *tps;
+	struct input_dev *idev;
+	int irq;
+
+	unsigned int pressed:1;
+};
+
+static irqreturn_t tps65218_pwr_irq(int irq, void *_pwr)
+{
+	struct tps65218_pwrbutton *pwr = _pwr;
+	unsigned int reg;
+	int ret;
+
+	ret = tps65218_reg_read(pwr->tps, TPS65218_REG_STATUS, &reg);
+	if (ret) {
+		dev_err(pwr->dev, "can't read register --> %d\n", ret);
+		goto out;
+	}
+
+	if (reg & TPS65218_STATUS_PB_STATE) {
+		input_report_key(pwr->idev, KEY_POWER, 1);
+		pm_wakeup_event(pwr->dev, 0);
+		pwr->pressed = true;
+	} else {
+		/*
+		 * we don't want to report KEY_POWER releases on any of the
+		 * other IRQ sources. Only when button was previously pressed
+		 */
+		if (pwr->pressed) {
+			input_report_key(pwr->idev, KEY_POWER, 0);
+			pwr->pressed = false;
+		}
+	}
+
+	input_sync(pwr->idev);
+
+out:
+	return IRQ_HANDLED;
+}
+
+static int tps65218_pwron_probe(struct platform_device *pdev)
+{
+	struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
+	struct device *dev = &pdev->dev;
+	struct tps65218_pwrbutton *pwr;
+	struct input_dev *idev;
+	int ret;
+
+	pwr = devm_kzalloc(dev, sizeof(*pwr), GFP_KERNEL);
+	if (!pwr)
+		return -ENOMEM;
+
+	idev = devm_input_allocate_device(dev);
+	if (!idev)
+		return -ENOMEM;
+
+	idev->name = "tps65218_pwrbutton";
+	idev->phys = "tps65218_pwrbutton/input0";
+	idev->dev.parent = dev;
+	idev->id.bustype = BUS_I2C;
+
+	input_set_capability(idev, EV_KEY, KEY_POWER);
+
+	pwr->tps = tps;
+	pwr->dev = dev;
+	pwr->idev = idev;
+	pwr->irq = platform_get_irq(pdev, 0);
+	platform_set_drvdata(pdev, pwr);
+	device_init_wakeup(dev, true);
+
+	ret = devm_request_threaded_irq(dev, pwr->irq, NULL, tps65218_pwr_irq,
+			IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+			dev_name(dev), pwr);
+	if (ret) {
+		dev_err(dev, "failed to request IRQ #%d --> %d\n",
+				pwr->irq, ret);
+		return ret;
+	}
+
+	ret = input_register_device(idev);
+	if (ret) {
+		dev_err(dev, "Can't register power button --> %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct of_device_id of_tps65218_pwr_match[] = {
+	{ .compatible = "ti,tps65218-pwrbutton" },
+	{ },
+};
+
+MODULE_DEVICE_TABLE(of, of_tps65218_pwr_match);
+
+static struct platform_driver tps65218_pwron_driver = {
+	.probe	= tps65218_pwron_probe,
+	.driver	= {
+		.name	= "tps65218_pwrbutton",
+		.of_match_table = of_tps65218_pwr_match,
+	},
+};
+module_platform_driver(tps65218_pwron_driver);
+
+MODULE_DESCRIPTION("TPS65218 Power Button");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
-- 
2.2.0

[PATCH 3/5] input: misc: add tps65218 power button driver

[Felipe Balbi]

Hi,

On Fri, Dec 26, 2014 at 01:28:22PM -0600, Felipe Balbi wrote:
> +static struct of_device_id of_tps65218_pwr_match[] = {
> +	{ .compatible = "ti,tps65218-pwrbutton" },

forgot to document this compatible. I'll add it localy but still wait a
a few days before resending so people have time to review.

-- 
balbi
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[PATCH 3/5] input: misc: add tps65218 power button driver

[Dmitry Torokhov]

Hi Felipe,

On Fri, Dec 26, 2014 at 01:28:22PM -0600, Felipe Balbi wrote:
> With this driver, we can report KEY_POWER on
> AM437x SK. This patch has been tested with said
> board.
> 
> Signed-off-by: Felipe Balbi <balbi@ti.com>
> ---
>  drivers/input/misc/Kconfig              |  10 +++
>  drivers/input/misc/Makefile             |   1 +
>  drivers/input/misc/tps65218-pwrbutton.c | 135 ++++++++++++++++++++++++++++++++
>  3 files changed, 146 insertions(+)
>  create mode 100644 drivers/input/misc/tps65218-pwrbutton.c
> 
> diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
> index 23297ab..364cfb8 100644
> --- a/drivers/input/misc/Kconfig
> +++ b/drivers/input/misc/Kconfig
> @@ -404,6 +404,16 @@ config INPUT_RETU_PWRBUTTON
>  	  To compile this driver as a module, choose M here. The module will
>  	  be called retu-pwrbutton.
>  
> +config INPUT_TPS65218_PWRBUTTON
> +	tristate "TPS65218 Power button driver"
> +	depends on MFD_TPS65218
> +	help
> +	  Say Y here if you want to enable power buttong reporting for
> +	  the TPS65218 Power Management IC device.
> +
> +	  To compile this driver as a module, choose M here. The module will
> +	  be called tps65218-pwrbutton.
> +
>  config INPUT_TWL4030_PWRBUTTON
>  	tristate "TWL4030 Power button Driver"
>  	depends on TWL4030_CORE
> diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
> index 19c7603..a923753 100644
> --- a/drivers/input/misc/Makefile
> +++ b/drivers/input/misc/Makefile
> @@ -59,6 +59,7 @@ obj-$(CONFIG_INPUT_SGI_BTNS)		+= sgi_btns.o
>  obj-$(CONFIG_INPUT_SIRFSOC_ONKEY)	+= sirfsoc-onkey.o
>  obj-$(CONFIG_INPUT_SOC_BUTTON_ARRAY)	+= soc_button_array.o
>  obj-$(CONFIG_INPUT_SPARCSPKR)		+= sparcspkr.o
> +obj-$(CONFIG_INPUT_TPS65218_PWRBUTTON)	+= tps65218-pwrbutton.o
>  obj-$(CONFIG_INPUT_TWL4030_PWRBUTTON)	+= twl4030-pwrbutton.o
>  obj-$(CONFIG_INPUT_TWL4030_VIBRA)	+= twl4030-vibra.o
>  obj-$(CONFIG_INPUT_TWL6040_VIBRA)	+= twl6040-vibra.o
> diff --git a/drivers/input/misc/tps65218-pwrbutton.c b/drivers/input/misc/tps65218-pwrbutton.c
> new file mode 100644
> index 0000000..a1f8a19
> --- /dev/null
> +++ b/drivers/input/misc/tps65218-pwrbutton.c
> @@ -0,0 +1,135 @@
> +/*
> + * Texas Instruments' TPS65218 Power Button Input Driver
> + *
> + * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
> + * Author: Felipe Balbi <balbi@ti.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/init.h>
> +#include <linux/input.h>
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/mfd/tps65218.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +#include <linux/slab.h>
> +
> +struct tps65218_pwrbutton {
> +	struct device *dev;
> +	struct tps65218 *tps;
> +	struct input_dev *idev;
> +	int irq;

You do not need to store IRQ since you are not using it outside of
probe().

> +
> +	unsigned int pressed:1;

You probably can remove 'pressed' as well and send events directly to
input core and rely on it to filter out duplicates so there won't be
release event without press event. If you prefer to keep it please use
bool instead of bit field.

> +};
> +
> +static irqreturn_t tps65218_pwr_irq(int irq, void *_pwr)
> +{
> +	struct tps65218_pwrbutton *pwr = _pwr;
> +	unsigned int reg;
> +	int ret;
> +
> +	ret = tps65218_reg_read(pwr->tps, TPS65218_REG_STATUS, &reg);
> +	if (ret) {
> +		dev_err(pwr->dev, "can't read register --> %d\n", ret);
> +		goto out;
> +	}
> +
> +	if (reg & TPS65218_STATUS_PB_STATE) {
> +		input_report_key(pwr->idev, KEY_POWER, 1);
> +		pm_wakeup_event(pwr->dev, 0);
> +		pwr->pressed = true;
> +	} else {
> +		/*
> +		 * we don't want to report KEY_POWER releases on any of the
> +		 * other IRQ sources. Only when button was previously pressed
> +		 */
> +		if (pwr->pressed) {
> +			input_report_key(pwr->idev, KEY_POWER, 0);
> +			pwr->pressed = false;
> +		}
> +	}
> +
> +	input_sync(pwr->idev);
> +
> +out:
> +	return IRQ_HANDLED;
> +}
> +
> +static int tps65218_pwron_probe(struct platform_device *pdev)
> +{
> +	struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
> +	struct device *dev = &pdev->dev;
> +	struct tps65218_pwrbutton *pwr;
> +	struct input_dev *idev;
> +	int ret;
> +
> +	pwr = devm_kzalloc(dev, sizeof(*pwr), GFP_KERNEL);
> +	if (!pwr)
> +		return -ENOMEM;
> +
> +	idev = devm_input_allocate_device(dev);
> +	if (!idev)
> +		return -ENOMEM;
> +
> +	idev->name = "tps65218_pwrbutton";
> +	idev->phys = "tps65218_pwrbutton/input0";
> +	idev->dev.parent = dev;
> +	idev->id.bustype = BUS_I2C;
> +
> +	input_set_capability(idev, EV_KEY, KEY_POWER);
> +
> +	pwr->tps = tps;
> +	pwr->dev = dev;
> +	pwr->idev = idev;
> +	pwr->irq = platform_get_irq(pdev, 0);
> +	platform_set_drvdata(pdev, pwr);
> +	device_init_wakeup(dev, true);
> +
> +	ret = devm_request_threaded_irq(dev, pwr->irq, NULL, tps65218_pwr_irq,
> +			IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
> +			dev_name(dev), pwr);

I am very fond of calling variables that hold error codes "error", Then
you have:

	error = f();
	if (error) {
		/* handle error */
	}

> +	if (ret) {
> +		dev_err(dev, "failed to request IRQ #%d --> %d\n",
> +				pwr->irq, ret);
> +		return ret;
> +	}
> +
> +	ret = input_register_device(idev);
> +	if (ret) {
> +		dev_err(dev, "Can't register power button --> %d\n", ret);
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static struct of_device_id of_tps65218_pwr_match[] = {
> +	{ .compatible = "ti,tps65218-pwrbutton" },
> +	{ },
> +};
> +
> +MODULE_DEVICE_TABLE(of, of_tps65218_pwr_match);
> +
> +static struct platform_driver tps65218_pwron_driver = {
> +	.probe	= tps65218_pwron_probe,
> +	.driver	= {
> +		.name	= "tps65218_pwrbutton",
> +		.of_match_table = of_tps65218_pwr_match,
> +	},
> +};
> +module_platform_driver(tps65218_pwron_driver);
> +
> +MODULE_DESCRIPTION("TPS65218 Power Button");
> +MODULE_LICENSE("GPL v2");
> +MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
> -- 
> 2.2.0
> 

Thanks!

-- 
Dmitry

[PATCH v2 3/5] input: misc: add tps65218 power button driver

[Felipe Balbi]

With this driver, we can report KEY_POWER on
AM437x SK. This patch has been tested with said
board.

Signed-off-by: Felipe Balbi <balbi@ti.com>
---

Changes since v1:
	- Add device tree documentation
	- s/ret/error
	- removed 'pressed' as input core will filter events
	- use a saner name when requesting IRQ. dev_name(dev) will return
		$i2c_bus_address.i2c-omap:0-0024:tps65218-pwrbutton
	- remove blank line before MODULE_DEVICE_TABLE()

 .../bindings/input/tps65218-pwrbutton.txt          |  17 +++
 drivers/input/misc/Kconfig                         |  10 ++
 drivers/input/misc/Makefile                        |   1 +
 drivers/input/misc/tps65218-pwrbutton.c            | 124 +++++++++++++++++++++
 4 files changed, 152 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt
 create mode 100644 drivers/input/misc/tps65218-pwrbutton.c

diff --git a/Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt b/Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt
new file mode 100644
index 0000000..e30e0b9
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt
@@ -0,0 +1,17 @@
+Texas Instruments TPS65218 power button
+
+This driver provides a simple power button event via an Interrupt.
+
+Required properties:
+- compatible: should be "ti,tps65218-pwrbutton"
+- interrupts: should be one of the following
+   - <3 IRQ_TYPE_EDGE_BOTH>: For controllers compatible with tps65218
+
+Example:
+
+&tps {
+	power-button {
+		compatible = "ti,tps65218-pwrbutton";
+		interrupts = <3 IRQ_TYPE_EDGE_BOTH>;
+	};
+};
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 23297ab..364cfb8 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -404,6 +404,16 @@ config INPUT_RETU_PWRBUTTON
 	  To compile this driver as a module, choose M here. The module will
 	  be called retu-pwrbutton.
 
+config INPUT_TPS65218_PWRBUTTON
+	tristate "TPS65218 Power button driver"
+	depends on MFD_TPS65218
+	help
+	  Say Y here if you want to enable power buttong reporting for
+	  the TPS65218 Power Management IC device.
+
+	  To compile this driver as a module, choose M here. The module will
+	  be called tps65218-pwrbutton.
+
 config INPUT_TWL4030_PWRBUTTON
 	tristate "TWL4030 Power button Driver"
 	depends on TWL4030_CORE
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 19c7603..a923753 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -59,6 +59,7 @@ obj-$(CONFIG_INPUT_SGI_BTNS)		+= sgi_btns.o
 obj-$(CONFIG_INPUT_SIRFSOC_ONKEY)	+= sirfsoc-onkey.o
 obj-$(CONFIG_INPUT_SOC_BUTTON_ARRAY)	+= soc_button_array.o
 obj-$(CONFIG_INPUT_SPARCSPKR)		+= sparcspkr.o
+obj-$(CONFIG_INPUT_TPS65218_PWRBUTTON)	+= tps65218-pwrbutton.o
 obj-$(CONFIG_INPUT_TWL4030_PWRBUTTON)	+= twl4030-pwrbutton.o
 obj-$(CONFIG_INPUT_TWL4030_VIBRA)	+= twl4030-vibra.o
 obj-$(CONFIG_INPUT_TWL6040_VIBRA)	+= twl6040-vibra.o
diff --git a/drivers/input/misc/tps65218-pwrbutton.c b/drivers/input/misc/tps65218-pwrbutton.c
new file mode 100644
index 0000000..2f85e2e
--- /dev/null
+++ b/drivers/input/misc/tps65218-pwrbutton.c
@@ -0,0 +1,124 @@
+/*
+ * Texas Instruments' TPS65218 Power Button Input Driver
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
+ * Author: Felipe Balbi <balbi@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/tps65218.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+struct tps65218_pwrbutton {
+	struct device *dev;
+	struct tps65218 *tps;
+	struct input_dev *idev;
+};
+
+static irqreturn_t tps65218_pwr_irq(int irq, void *_pwr)
+{
+	struct tps65218_pwrbutton *pwr = _pwr;
+	unsigned int reg;
+	int error;
+
+	error = tps65218_reg_read(pwr->tps, TPS65218_REG_STATUS, &reg);
+	if (error) {
+		dev_err(pwr->dev, "can't read register --> %d\n", error);
+		goto out;
+	}
+
+	if (reg & TPS65218_STATUS_PB_STATE) {
+		input_report_key(pwr->idev, KEY_POWER, 1);
+		pm_wakeup_event(pwr->dev, 0);
+	} else {
+		input_report_key(pwr->idev, KEY_POWER, 0);
+	}
+
+	input_sync(pwr->idev);
+
+out:
+	return IRQ_HANDLED;
+}
+
+static int tps65218_pwron_probe(struct platform_device *pdev)
+{
+	struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
+	struct device *dev = &pdev->dev;
+	struct tps65218_pwrbutton *pwr;
+	struct input_dev *idev;
+	int error;
+	int irq;
+
+	pwr = devm_kzalloc(dev, sizeof(*pwr), GFP_KERNEL);
+	if (!pwr)
+		return -ENOMEM;
+
+	idev = devm_input_allocate_device(dev);
+	if (!idev)
+		return -ENOMEM;
+
+	idev->name = "tps65218_pwrbutton";
+	idev->phys = "tps65218_pwrbutton/input0";
+	idev->dev.parent = dev;
+	idev->id.bustype = BUS_I2C;
+
+	input_set_capability(idev, EV_KEY, KEY_POWER);
+
+	pwr->tps = tps;
+	pwr->dev = dev;
+	pwr->idev = idev;
+	platform_set_drvdata(pdev, pwr);
+	device_init_wakeup(dev, true);
+
+	irq = platform_get_irq(pdev, 0);
+	error = devm_request_threaded_irq(dev, irq, NULL, tps65218_pwr_irq,
+			IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+			"tps65218-pwrbutton", pwr);
+	if (error) {
+		dev_err(dev, "failed to request IRQ #%d --> %d\n",
+				irq, error);
+		return error;
+	}
+
+	error= input_register_device(idev);
+	if (error) {
+		dev_err(dev, "Can't register power button --> %d\n", error);
+		return error;
+	}
+
+	return 0;
+}
+
+static struct of_device_id of_tps65218_pwr_match[] = {
+	{ .compatible = "ti,tps65218-pwrbutton" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, of_tps65218_pwr_match);
+
+static struct platform_driver tps65218_pwron_driver = {
+	.probe	= tps65218_pwron_probe,
+	.driver	= {
+		.name	= "tps65218_pwrbutton",
+		.of_match_table = of_tps65218_pwr_match,
+	},
+};
+module_platform_driver(tps65218_pwron_driver);
+
+MODULE_DESCRIPTION("TPS65218 Power Button");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
-- 
2.2.0

[PATCH v2 3/5] input: misc: add tps65218 power button driver

[Dmitry Torokhov]

On Fri, Dec 26, 2014 at 09:36:48PM -0600, Felipe Balbi wrote:
> With this driver, we can report KEY_POWER on
> AM437x SK. This patch has been tested with said
> board.
> 
> Signed-off-by: Felipe Balbi <balbi@ti.com>

Applied, thank you.

> ---
> 
> Changes since v1:
> 	- Add device tree documentation
> 	- s/ret/error
> 	- removed 'pressed' as input core will filter events
> 	- use a saner name when requesting IRQ. dev_name(dev) will return
> 		$i2c_bus_address.i2c-omap:0-0024:tps65218-pwrbutton
> 	- remove blank line before MODULE_DEVICE_TABLE()
> 
>  .../bindings/input/tps65218-pwrbutton.txt          |  17 +++
>  drivers/input/misc/Kconfig                         |  10 ++
>  drivers/input/misc/Makefile                        |   1 +
>  drivers/input/misc/tps65218-pwrbutton.c            | 124 +++++++++++++++++++++
>  4 files changed, 152 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt
>  create mode 100644 drivers/input/misc/tps65218-pwrbutton.c
> 
> diff --git a/Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt b/Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt
> new file mode 100644
> index 0000000..e30e0b9
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/tps65218-pwrbutton.txt
> @@ -0,0 +1,17 @@
> +Texas Instruments TPS65218 power button
> +
> +This driver provides a simple power button event via an Interrupt.
> +
> +Required properties:
> +- compatible: should be "ti,tps65218-pwrbutton"
> +- interrupts: should be one of the following
> +   - <3 IRQ_TYPE_EDGE_BOTH>: For controllers compatible with tps65218
> +
> +Example:
> +
> +&tps {
> +	power-button {
> +		compatible = "ti,tps65218-pwrbutton";
> +		interrupts = <3 IRQ_TYPE_EDGE_BOTH>;
> +	};
> +};
> diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
> index 23297ab..364cfb8 100644
> --- a/drivers/input/misc/Kconfig
> +++ b/drivers/input/misc/Kconfig
> @@ -404,6 +404,16 @@ config INPUT_RETU_PWRBUTTON
>  	  To compile this driver as a module, choose M here. The module will
>  	  be called retu-pwrbutton.
>  
> +config INPUT_TPS65218_PWRBUTTON
> +	tristate "TPS65218 Power button driver"
> +	depends on MFD_TPS65218
> +	help
> +	  Say Y here if you want to enable power buttong reporting for
> +	  the TPS65218 Power Management IC device.
> +
> +	  To compile this driver as a module, choose M here. The module will
> +	  be called tps65218-pwrbutton.
> +
>  config INPUT_TWL4030_PWRBUTTON
>  	tristate "TWL4030 Power button Driver"
>  	depends on TWL4030_CORE
> diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
> index 19c7603..a923753 100644
> --- a/drivers/input/misc/Makefile
> +++ b/drivers/input/misc/Makefile
> @@ -59,6 +59,7 @@ obj-$(CONFIG_INPUT_SGI_BTNS)		+= sgi_btns.o
>  obj-$(CONFIG_INPUT_SIRFSOC_ONKEY)	+= sirfsoc-onkey.o
>  obj-$(CONFIG_INPUT_SOC_BUTTON_ARRAY)	+= soc_button_array.o
>  obj-$(CONFIG_INPUT_SPARCSPKR)		+= sparcspkr.o
> +obj-$(CONFIG_INPUT_TPS65218_PWRBUTTON)	+= tps65218-pwrbutton.o
>  obj-$(CONFIG_INPUT_TWL4030_PWRBUTTON)	+= twl4030-pwrbutton.o
>  obj-$(CONFIG_INPUT_TWL4030_VIBRA)	+= twl4030-vibra.o
>  obj-$(CONFIG_INPUT_TWL6040_VIBRA)	+= twl6040-vibra.o
> diff --git a/drivers/input/misc/tps65218-pwrbutton.c b/drivers/input/misc/tps65218-pwrbutton.c
> new file mode 100644
> index 0000000..2f85e2e
> --- /dev/null
> +++ b/drivers/input/misc/tps65218-pwrbutton.c
> @@ -0,0 +1,124 @@
> +/*
> + * Texas Instruments' TPS65218 Power Button Input Driver
> + *
> + * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
> + * Author: Felipe Balbi <balbi@ti.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/init.h>
> +#include <linux/input.h>
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/mfd/tps65218.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +#include <linux/slab.h>
> +
> +struct tps65218_pwrbutton {
> +	struct device *dev;
> +	struct tps65218 *tps;
> +	struct input_dev *idev;
> +};
> +
> +static irqreturn_t tps65218_pwr_irq(int irq, void *_pwr)
> +{
> +	struct tps65218_pwrbutton *pwr = _pwr;
> +	unsigned int reg;
> +	int error;
> +
> +	error = tps65218_reg_read(pwr->tps, TPS65218_REG_STATUS, &reg);
> +	if (error) {
> +		dev_err(pwr->dev, "can't read register --> %d\n", error);
> +		goto out;
> +	}
> +
> +	if (reg & TPS65218_STATUS_PB_STATE) {
> +		input_report_key(pwr->idev, KEY_POWER, 1);
> +		pm_wakeup_event(pwr->dev, 0);
> +	} else {
> +		input_report_key(pwr->idev, KEY_POWER, 0);
> +	}
> +
> +	input_sync(pwr->idev);
> +
> +out:
> +	return IRQ_HANDLED;
> +}
> +
> +static int tps65218_pwron_probe(struct platform_device *pdev)
> +{
> +	struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
> +	struct device *dev = &pdev->dev;
> +	struct tps65218_pwrbutton *pwr;
> +	struct input_dev *idev;
> +	int error;
> +	int irq;
> +
> +	pwr = devm_kzalloc(dev, sizeof(*pwr), GFP_KERNEL);
> +	if (!pwr)
> +		return -ENOMEM;
> +
> +	idev = devm_input_allocate_device(dev);
> +	if (!idev)
> +		return -ENOMEM;
> +
> +	idev->name = "tps65218_pwrbutton";
> +	idev->phys = "tps65218_pwrbutton/input0";
> +	idev->dev.parent = dev;
> +	idev->id.bustype = BUS_I2C;
> +
> +	input_set_capability(idev, EV_KEY, KEY_POWER);
> +
> +	pwr->tps = tps;
> +	pwr->dev = dev;
> +	pwr->idev = idev;
> +	platform_set_drvdata(pdev, pwr);
> +	device_init_wakeup(dev, true);
> +
> +	irq = platform_get_irq(pdev, 0);
> +	error = devm_request_threaded_irq(dev, irq, NULL, tps65218_pwr_irq,
> +			IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
> +			"tps65218-pwrbutton", pwr);
> +	if (error) {
> +		dev_err(dev, "failed to request IRQ #%d --> %d\n",
> +				irq, error);
> +		return error;
> +	}
> +
> +	error= input_register_device(idev);
> +	if (error) {
> +		dev_err(dev, "Can't register power button --> %d\n", error);
> +		return error;
> +	}
> +
> +	return 0;
> +}
> +
> +static struct of_device_id of_tps65218_pwr_match[] = {
> +	{ .compatible = "ti,tps65218-pwrbutton" },
> +	{ },
> +};
> +MODULE_DEVICE_TABLE(of, of_tps65218_pwr_match);
> +
> +static struct platform_driver tps65218_pwron_driver = {
> +	.probe	= tps65218_pwron_probe,
> +	.driver	= {
> +		.name	= "tps65218_pwrbutton",
> +		.of_match_table = of_tps65218_pwr_match,
> +	},
> +};
> +module_platform_driver(tps65218_pwron_driver);
> +
> +MODULE_DESCRIPTION("TPS65218 Power Button");
> +MODULE_LICENSE("GPL v2");
> +MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
> -- 
> 2.2.0
> 

-- 
Dmitry

[PATCH 4/5] arm: boot: dts: am437x-sk: add power button binding

[Felipe Balbi]

Let this board report KEY_POWER so upper layers
can decide what to do when power button is pressed.

Signed-off-by: Felipe Balbi <balbi@ti.com>
---
 arch/arm/boot/dts/am437x-sk-evm.dts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/boot/dts/am437x-sk-evm.dts b/arch/arm/boot/dts/am437x-sk-evm.dts
index 53bbfc9..c53840c 100644
--- a/arch/arm/boot/dts/am437x-sk-evm.dts
+++ b/arch/arm/boot/dts/am437x-sk-evm.dts
@@ -386,6 +386,11 @@
 			regulator-always-on;
 		};
 
+		power-button {
+			compatible = "ti,tps65218-pwrbutton";
+			status = "okay";
+			interrupts = <3 IRQ_TYPE_EDGE_BOTH>;
+		};
 	};
 
 	at24 at 50 {
-- 
2.2.0

[PATCH 4/5] arm: boot: dts: am437x-sk: add power button binding

[Tony Lindgren]

* Felipe Balbi <balbi@ti.com> [141226 11:31]:
> Let this board report KEY_POWER so upper layers
> can decide what to do when power button is pressed.
> 
> Signed-off-by: Felipe Balbi <balbi@ti.com>

Applying this one into omap-for-v3.20/dt thanks.

Tony

> ---
>  arch/arm/boot/dts/am437x-sk-evm.dts | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/am437x-sk-evm.dts b/arch/arm/boot/dts/am437x-sk-evm.dts
> index 53bbfc9..c53840c 100644
> --- a/arch/arm/boot/dts/am437x-sk-evm.dts
> +++ b/arch/arm/boot/dts/am437x-sk-evm.dts
> @@ -386,6 +386,11 @@
>  			regulator-always-on;
>  		};
>  
> +		power-button {
> +			compatible = "ti,tps65218-pwrbutton";
> +			status = "okay";
> +			interrupts = <3 IRQ_TYPE_EDGE_BOTH>;
> +		};
>  	};
>  
>  	at24 at 50 {
> -- 
> 2.2.0
> 

[PATCH 5/5] arm: omap2plus_defconfig: enable TPS65218 power button

[Felipe Balbi]

Enable tps65218 power button driver by default as
a dynamically linked module so AM437x SK can report
power button presses.

Signed-off-by: Felipe Balbi <balbi@ti.com>
---
 arch/arm/configs/omap2plus_defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig
index c2c3a85..f4a4b2f 100644
--- a/arch/arm/configs/omap2plus_defconfig
+++ b/arch/arm/configs/omap2plus_defconfig
@@ -183,6 +183,7 @@ CONFIG_TOUCHSCREEN_EDT_FT5X06=m
 CONFIG_TOUCHSCREEN_TSC2005=m
 CONFIG_TOUCHSCREEN_TSC2007=m
 CONFIG_INPUT_MISC=y
+CONFIG_INPUT_TPS65218_PWRBUTTON=m
 CONFIG_INPUT_TWL4030_PWRBUTTON=y
 # CONFIG_LEGACY_PTYS is not set
 CONFIG_SERIAL_8250=y
-- 
2.2.0

[PATCH 5/5] arm: omap2plus_defconfig: enable TPS65218 power button

[Tony Lindgren]

* Felipe Balbi <balbi@ti.com> [141226 11:31]:
> Enable tps65218 power button driver by default as
> a dynamically linked module so AM437x SK can report
> power button presses.
> 
> Signed-off-by: Felipe Balbi <balbi@ti.com>

Applying this into omap-for-v3.20/defconfig thanks.

Tony

> ---
>  arch/arm/configs/omap2plus_defconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig
> index c2c3a85..f4a4b2f 100644
> --- a/arch/arm/configs/omap2plus_defconfig
> +++ b/arch/arm/configs/omap2plus_defconfig
> @@ -183,6 +183,7 @@ CONFIG_TOUCHSCREEN_EDT_FT5X06=m
>  CONFIG_TOUCHSCREEN_TSC2005=m
>  CONFIG_TOUCHSCREEN_TSC2007=m
>  CONFIG_INPUT_MISC=y
> +CONFIG_INPUT_TPS65218_PWRBUTTON=m
>  CONFIG_INPUT_TWL4030_PWRBUTTON=y
>  # CONFIG_LEGACY_PTYS is not set
>  CONFIG_SERIAL_8250=y
> -- 
> 2.2.0
>