[PATCH v2 0/2] gpio: davinci: reuse for keystone arch

[PATCH v2 0/2] gpio: davinci: reuse for keystone arch

[Grygorii Strashko]

This series is intended to update Davinci GPIO driver and reuse
it for Keystone SoCs, because Keystone uses the similar GPIO IP like Davinci.
Keystone GPIO IP: supports:
- up to 32 GPIO lines;
- only unbanked irqs;

See Documentation:
Keystone - http://www.ti.com/lit/ug/sprugv1/sprugv1.pdf

This series based on:
https://git.kernel.org/cgit/linux/kernel/git/nsekhar/linux-davinci.git/log/?h=v3.14/gpio

Changes in v2:
- minor comments applied, no functional changes

v1: https://lkml.org/lkml/2013/12/12/366

Cc: Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: Alexandre Courbot <gnurou-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Sekhar Nori <nsekhar-l0cyMroinI0@public.gmane.org>
Cc: Santosh Shilimkar <santosh.shilimkar-l0cyMroinI0@public.gmane.org>

Grygorii Strashko (2):
  gpio: davinci: don't create irq_domain in case of unbanked irqs
  gpio: davinci: reuse for Keystone SoC

 .../devicetree/bindings/gpio/gpio-davinci.txt      |    4 +-
 drivers/gpio/gpio-davinci.c                        |   80 ++++++++++++++------
 2 files changed, 59 insertions(+), 25 deletions(-)

-- 
1.7.9.5

[PATCH v2 1/2] gpio: davinci: don't create irq_domain in case of unbanked irqs

[Grygorii Strashko]

The system may crash if:
- there are more then 1 bank
- unbanked irqs are enabled
- someone will call gpio_to_irq() for GPIO from bank2 or above

Hence, fix it by not creating irq_domain if unbanked irqs are enabled
and correct gpio_to_irq_banked() to handle this properly.

Cc: Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: Alexandre Courbot <gnurou-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Sekhar Nori <nsekhar-l0cyMroinI0@public.gmane.org>

Acked-by: Santosh Shilimkar <santosh.shilimkar-l0cyMroinI0@public.gmane.org>
Signed-off-by: Grygorii Strashko <grygorii.strashko-l0cyMroinI0@public.gmane.org>
---
 drivers/gpio/gpio-davinci.c |   34 +++++++++++++++++++---------------
 1 file changed, 19 insertions(+), 15 deletions(-)

diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
index 5d163c0..1b33806 100644
--- a/drivers/gpio/gpio-davinci.c
+++ b/drivers/gpio/gpio-davinci.c
@@ -351,7 +351,10 @@ static int gpio_to_irq_banked(struct gpio_chip *chip, unsigned offset)
 {
 	struct davinci_gpio_controller *d = chip2controller(chip);
 
-	return irq_create_mapping(d->irq_domain, d->chip.base + offset);
+	if (d->irq_domain)
+		return irq_create_mapping(d->irq_domain, d->chip.base + offset);
+	else
+		return -ENXIO;
 }
 
 static int gpio_to_irq_unbanked(struct gpio_chip *chip, unsigned offset)
@@ -429,7 +432,7 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
 	struct davinci_gpio_controller *chips = platform_get_drvdata(pdev);
 	struct davinci_gpio_platform_data *pdata = dev->platform_data;
 	struct davinci_gpio_regs __iomem *g;
-	struct irq_domain	*irq_domain;
+	struct irq_domain	*irq_domain = NULL;
 
 	ngpio = pdata->ngpio;
 	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
@@ -453,18 +456,20 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
 	}
 	clk_prepare_enable(clk);
 
-	irq = irq_alloc_descs(-1, 0, ngpio, 0);
-	if (irq < 0) {
-		dev_err(dev, "Couldn't allocate IRQ numbers\n");
-		return irq;
-	}
+	if (!pdata->gpio_unbanked) {
+		irq = irq_alloc_descs(-1, 0, ngpio, 0);
+		if (irq < 0) {
+			dev_err(dev, "Couldn't allocate IRQ numbers\n");
+			return -ENODEV;
+		}
 
-	irq_domain = irq_domain_add_legacy(NULL, ngpio, irq, 0,
-						&davinci_gpio_irq_ops,
-						chips);
-	if (!irq_domain) {
-		dev_err(dev, "Couldn't register an IRQ domain\n");
-		return -ENODEV;
+		irq_domain = irq_domain_add_legacy(NULL, ngpio, irq, 0,
+							&davinci_gpio_irq_ops,
+							chips);
+		if (!irq_domain) {
+			dev_err(dev, "Couldn't register an IRQ domain\n");
+			return -ENODEV;
+		}
 	}
 
 	/*
@@ -475,8 +480,7 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
 	 */
 	for (gpio = 0, bank = 0; gpio < ngpio; bank++, gpio += 32) {
 		chips[bank].chip.to_irq = gpio_to_irq_banked;
-		if (!pdata->gpio_unbanked)
-			chips[bank].irq_domain = irq_domain;
+		chips[bank].irq_domain = irq_domain;
 	}
 
 	/*
-- 
1.7.9.5

Re: [PATCH v2 1/2] gpio: davinci: don't create irq_domain in case of unbanked irqs

[Prabhakar Lad]

On Wed, Dec 18, 2013 at 3:37 PM, Grygorii Strashko
<grygorii.strashko@ti.com> wrote:
> The system may crash if:
> - there are more then 1 bank
> - unbanked irqs are enabled
> - someone will call gpio_to_irq() for GPIO from bank2 or above
>
> Hence, fix it by not creating irq_domain if unbanked irqs are enabled
> and correct gpio_to_irq_banked() to handle this properly.
>
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Alexandre Courbot <gnurou@gmail.com>
> Cc: Sekhar Nori <nsekhar@ti.com>
>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>

Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>

Regards,
--Prabhakar Lad

Re: [PATCH v2 1/2] gpio: davinci: don't create irq_domain in case of unbanked irqs

[Sekhar Nori]

On Wednesday 18 December 2013 03:37 PM, Grygorii Strashko wrote:
> The system may crash if:
> - there are more then 1 bank

s/then/than

> - unbanked irqs are enabled
> - someone will call gpio_to_irq() for GPIO from bank2 or above
> 
> Hence, fix it by not creating irq_domain if unbanked irqs are enabled
> and correct gpio_to_irq_banked() to handle this properly.
> 
> Cc: Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> Cc: Alexandre Courbot <gnurou-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Cc: Sekhar Nori <nsekhar-l0cyMroinI0@public.gmane.org>
> 
> Acked-by: Santosh Shilimkar <santosh.shilimkar-l0cyMroinI0@public.gmane.org>
> Signed-off-by: Grygorii Strashko <grygorii.strashko-l0cyMroinI0@public.gmane.org>
> ---
>  drivers/gpio/gpio-davinci.c |   34 +++++++++++++++++++---------------
>  1 file changed, 19 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
> index 5d163c0..1b33806 100644
> --- a/drivers/gpio/gpio-davinci.c
> +++ b/drivers/gpio/gpio-davinci.c
> @@ -351,7 +351,10 @@ static int gpio_to_irq_banked(struct gpio_chip *chip, unsigned offset)
>  {
>  	struct davinci_gpio_controller *d = chip2controller(chip);
>  
> -	return irq_create_mapping(d->irq_domain, d->chip.base + offset);
> +	if (d->irq_domain)
> +		return irq_create_mapping(d->irq_domain, d->chip.base + offset);
> +	else
> +		return -ENXIO;
>  }
>  
>  static int gpio_to_irq_unbanked(struct gpio_chip *chip, unsigned offset)
> @@ -429,7 +432,7 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
>  	struct davinci_gpio_controller *chips = platform_get_drvdata(pdev);
>  	struct davinci_gpio_platform_data *pdata = dev->platform_data;
>  	struct davinci_gpio_regs __iomem *g;
> -	struct irq_domain	*irq_domain;
> +	struct irq_domain	*irq_domain = NULL;
>  
>  	ngpio = pdata->ngpio;
>  	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
> @@ -453,18 +456,20 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
>  	}
>  	clk_prepare_enable(clk);
>  
> -	irq = irq_alloc_descs(-1, 0, ngpio, 0);
> -	if (irq < 0) {
> -		dev_err(dev, "Couldn't allocate IRQ numbers\n");
> -		return irq;
> -	}
> +	if (!pdata->gpio_unbanked) {
> +		irq = irq_alloc_descs(-1, 0, ngpio, 0);
> +		if (irq < 0) {
> +			dev_err(dev, "Couldn't allocate IRQ numbers\n");
> +			return -ENODEV;

The code was correct before moving. Any objections to doing

			return irq;

instead?

Thanks,
Sekhar

Re: [PATCH v2 1/2] gpio: davinci: don't create irq_domain in case of unbanked irqs

[Grygorii Strashko]

On 12/22/2013 05:52 PM, Sekhar Nori wrote:
> On Wednesday 18 December 2013 03:37 PM, Grygorii Strashko wrote:
>> The system may crash if:
>> - there are more then 1 bank
>
> s/then/than
>
>> - unbanked irqs are enabled
>> - someone will call gpio_to_irq() for GPIO from bank2 or above
>>
>> Hence, fix it by not creating irq_domain if unbanked irqs are enabled
>> and correct gpio_to_irq_banked() to handle this properly.
>>
>> Cc: Linus Walleij <linus.walleij@linaro.org>
>> Cc: Alexandre Courbot <gnurou@gmail.com>
>> Cc: Sekhar Nori <nsekhar@ti.com>
>>
>> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
>> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
>> ---
>>   drivers/gpio/gpio-davinci.c |   34 +++++++++++++++++++---------------
>>   1 file changed, 19 insertions(+), 15 deletions(-)
>>
>> diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
>> index 5d163c0..1b33806 100644
>> --- a/drivers/gpio/gpio-davinci.c
>> +++ b/drivers/gpio/gpio-davinci.c
>> @@ -351,7 +351,10 @@ static int gpio_to_irq_banked(struct gpio_chip *chip, unsigned offset)
>>   {
>>   	struct davinci_gpio_controller *d = chip2controller(chip);
>>
>> -	return irq_create_mapping(d->irq_domain, d->chip.base + offset);
>> +	if (d->irq_domain)
>> +		return irq_create_mapping(d->irq_domain, d->chip.base + offset);
>> +	else
>> +		return -ENXIO;
>>   }
>>
>>   static int gpio_to_irq_unbanked(struct gpio_chip *chip, unsigned offset)
>> @@ -429,7 +432,7 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
>>   	struct davinci_gpio_controller *chips = platform_get_drvdata(pdev);
>>   	struct davinci_gpio_platform_data *pdata = dev->platform_data;
>>   	struct davinci_gpio_regs __iomem *g;
>> -	struct irq_domain	*irq_domain;
>> +	struct irq_domain	*irq_domain = NULL;
>>
>>   	ngpio = pdata->ngpio;
>>   	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
>> @@ -453,18 +456,20 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
>>   	}
>>   	clk_prepare_enable(clk);
>>
>> -	irq = irq_alloc_descs(-1, 0, ngpio, 0);
>> -	if (irq < 0) {
>> -		dev_err(dev, "Couldn't allocate IRQ numbers\n");
>> -		return irq;
>> -	}
>> +	if (!pdata->gpio_unbanked) {
>> +		irq = irq_alloc_descs(-1, 0, ngpio, 0);
>> +		if (irq < 0) {
>> +			dev_err(dev, "Couldn't allocate IRQ numbers\n");
>> +			return -ENODEV;
>
> The code was correct before moving. Any objections to doing
>
> 			return irq;
>
> instead?

This is mistake. I'll update. Thanks

>
> Thanks,
> Sekhar
>

[PATCH v2 2/2] gpio: davinci: reuse for Keystone SoC

[Grygorii Strashko]

The similar GPIO HW block is used by keystone SoCs as
in Davinci SoCs.
Hence, reuse Davinci GPIO driver for Keystone taking into
account that Keystone contains ARM GIC IRQ controller which
is implemented using IRQ Chip.

Documentation:
	http://www.ti.com/lit/ug/sprugv1/sprugv1.pdf

Cc: Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: Alexandre Courbot <gnurou-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Sekhar Nori <nsekhar-l0cyMroinI0@public.gmane.org>
Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org

Acked-by: Santosh Shilimkar <santosh.shilimkar-l0cyMroinI0@public.gmane.org>
Signed-off-by: Grygorii Strashko <grygorii.strashko-l0cyMroinI0@public.gmane.org>
---
 .../devicetree/bindings/gpio/gpio-davinci.txt      |    4 +-
 drivers/gpio/gpio-davinci.c                        |   46 ++++++++++++++++----
 2 files changed, 40 insertions(+), 10 deletions(-)

diff --git a/Documentation/devicetree/bindings/gpio/gpio-davinci.txt b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
index a2e839d..4ce9862 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
@@ -1,7 +1,7 @@
-Davinci GPIO controller bindings
+Davinci/Keystone GPIO controller bindings
 
 Required Properties:
-- compatible: should be "ti,dm6441-gpio"
+- compatible: should be "ti,dm6441-gpio", "ti,keystone-gpio"
 
 - reg: Physical base address of the controller and the size of memory mapped
        registers.
diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
index 1b33806..38741cc 100644
--- a/drivers/gpio/gpio-davinci.c
+++ b/drivers/gpio/gpio-davinci.c
@@ -413,6 +413,26 @@ static const struct irq_domain_ops davinci_gpio_irq_ops = {
 	.xlate = irq_domain_xlate_onetwocell,
 };
 
+static struct irq_chip *davinci_gpio_get_irq_chip(unsigned int irq)
+{
+	static struct irq_chip_type gpio_unbanked;
+
+	gpio_unbanked = *container_of(irq_get_chip(irq),
+				      struct irq_chip_type, chip);
+
+	return &gpio_unbanked.chip;
+};
+
+static struct irq_chip *keystone_gpio_get_irq_chip(unsigned int irq)
+{
+	static struct irq_chip gpio_unbanked;
+
+	gpio_unbanked = *irq_get_chip(irq);
+	return &gpio_unbanked;
+};
+
+static const struct of_device_id davinci_gpio_ids[];
+
 /*
  * NOTE:  for suspend/resume, probably best to make a platform_device with
  * suspend_late/resume_resume calls hooking into results of the set_wake()
@@ -433,6 +453,18 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
 	struct davinci_gpio_platform_data *pdata = dev->platform_data;
 	struct davinci_gpio_regs __iomem *g;
 	struct irq_domain	*irq_domain = NULL;
+	const struct of_device_id *match;
+	struct irq_chip *irq_chip;
+	struct irq_chip *(*gpio_get_irq_chip)(unsigned int irq);
+
+	/*
+	 * Use davinci_gpio_get_irq_chip by default to handle non DT cases
+	 */
+	gpio_get_irq_chip = davinci_gpio_get_irq_chip;
+	match = of_match_device(of_match_ptr(davinci_gpio_ids),
+				dev);
+	if (match)
+		gpio_get_irq_chip = match->data;
 
 	ngpio = pdata->ngpio;
 	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
@@ -489,8 +521,6 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
 	 * IRQ mux conflicts; gpio_irq_type_unbanked() is only for GPIOs.
 	 */
 	if (pdata->gpio_unbanked) {
-		static struct irq_chip_type gpio_unbanked;
-
 		/* pass "bank 0" GPIO IRQs to AINTC */
 		chips[0].chip.to_irq = gpio_to_irq_unbanked;
 		chips[0].gpio_irq = bank_irq;
@@ -499,10 +529,9 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
 
 		/* AINTC handles mask/unmask; GPIO handles triggering */
 		irq = bank_irq;
-		gpio_unbanked = *container_of(irq_get_chip(irq),
-					      struct irq_chip_type, chip);
-		gpio_unbanked.chip.name = "GPIO-AINTC";
-		gpio_unbanked.chip.irq_set_type = gpio_irq_type_unbanked;
+		irq_chip = gpio_get_irq_chip(irq);
+		irq_chip->name = "GPIO-AINTC";
+		irq_chip->irq_set_type = gpio_irq_type_unbanked;
 
 		/* default trigger: both edges */
 		g = gpio2regs(0);
@@ -511,7 +540,7 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
 
 		/* set the direct IRQs up to use that irqchip */
 		for (gpio = 0; gpio < pdata->gpio_unbanked; gpio++, irq++) {
-			irq_set_chip(irq, &gpio_unbanked.chip);
+			irq_set_chip(irq, irq_chip);
 			irq_set_handler_data(irq, &chips[gpio / 32]);
 			irq_set_status_flags(irq, IRQ_TYPE_EDGE_BOTH);
 		}
@@ -554,7 +583,8 @@ done:
 
 #if IS_ENABLED(CONFIG_OF)
 static const struct of_device_id davinci_gpio_ids[] = {
-	{ .compatible = "ti,dm6441-gpio", },
+	{ .compatible = "ti,keystone-gpio", keystone_gpio_get_irq_chip},
+	{ .compatible = "ti,dm6441-gpio", davinci_gpio_get_irq_chip},
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, davinci_gpio_ids);
-- 
1.7.9.5

Re: [PATCH v2 2/2] gpio: davinci: reuse for Keystone SoC

[Prabhakar Lad]

On Wed, Dec 18, 2013 at 3:37 PM, Grygorii Strashko
<grygorii.strashko@ti.com> wrote:
> The similar GPIO HW block is used by keystone SoCs as
> in Davinci SoCs.
> Hence, reuse Davinci GPIO driver for Keystone taking into
> account that Keystone contains ARM GIC IRQ controller which
> is implemented using IRQ Chip.
>
> Documentation:
>         http://www.ti.com/lit/ug/sprugv1/sprugv1.pdf
>
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Alexandre Courbot <gnurou@gmail.com>
> Cc: Sekhar Nori <nsekhar@ti.com>
> Cc: devicetree@vger.kernel.org
>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>

Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>

Regards,
--Prabhakar Lad

Re: [PATCH v2 2/2] gpio: davinci: reuse for Keystone SoC

[Sekhar Nori]

Rob,

On Wednesday 18 December 2013 03:37 PM, Grygorii Strashko wrote:
> The similar GPIO HW block is used by keystone SoCs as
> in Davinci SoCs.
> Hence, reuse Davinci GPIO driver for Keystone taking into
> account that Keystone contains ARM GIC IRQ controller which
> is implemented using IRQ Chip.
> 
> Documentation:
> 	http://www.ti.com/lit/ug/sprugv1/sprugv1.pdf
> 
> Cc: Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> Cc: Alexandre Courbot <gnurou-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Cc: Sekhar Nori <nsekhar-l0cyMroinI0@public.gmane.org>
> Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> 
> Acked-by: Santosh Shilimkar <santosh.shilimkar-l0cyMroinI0@public.gmane.org>
> Signed-off-by: Grygorii Strashko <grygorii.strashko-l0cyMroinI0@public.gmane.org>
> ---
>  .../devicetree/bindings/gpio/gpio-davinci.txt      |    4 +-
>  drivers/gpio/gpio-davinci.c                        |   46 ++++++++++++++++----
>  2 files changed, 40 insertions(+), 10 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-davinci.txt b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
> index a2e839d..4ce9862 100644
> --- a/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
> +++ b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
> @@ -1,7 +1,7 @@
> -Davinci GPIO controller bindings
> +Davinci/Keystone GPIO controller bindings
>  
>  Required Properties:
> -- compatible: should be "ti,dm6441-gpio"
> +- compatible: should be "ti,dm6441-gpio", "ti,keystone-gpio"

Can I get your ack for this change? Its pretty trivial, but still..

Thanks,
Sekhar

Re: [PATCH v2 2/2] gpio: davinci: reuse for Keystone SoC

[Sekhar Nori]

On Wednesday 18 December 2013 03:37 PM, Grygorii Strashko wrote:
> The similar GPIO HW block is used by keystone SoCs as
> in Davinci SoCs.
> Hence, reuse Davinci GPIO driver for Keystone taking into
> account that Keystone contains ARM GIC IRQ controller which
> is implemented using IRQ Chip.
> 
> Documentation:
> 	http://www.ti.com/lit/ug/sprugv1/sprugv1.pdf
> 
> Cc: Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> Cc: Alexandre Courbot <gnurou-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Cc: Sekhar Nori <nsekhar-l0cyMroinI0@public.gmane.org>
> Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> 
> Acked-by: Santosh Shilimkar <santosh.shilimkar-l0cyMroinI0@public.gmane.org>
> Signed-off-by: Grygorii Strashko <grygorii.strashko-l0cyMroinI0@public.gmane.org>
> ---
>  .../devicetree/bindings/gpio/gpio-davinci.txt      |    4 +-
>  drivers/gpio/gpio-davinci.c                        |   46 ++++++++++++++++----
>  2 files changed, 40 insertions(+), 10 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-davinci.txt b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
> index a2e839d..4ce9862 100644
> --- a/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
> +++ b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
> @@ -1,7 +1,7 @@
> -Davinci GPIO controller bindings
> +Davinci/Keystone GPIO controller bindings
>  
>  Required Properties:
> -- compatible: should be "ti,dm6441-gpio"
> +- compatible: should be "ti,dm6441-gpio", "ti,keystone-gpio"
>  
>  - reg: Physical base address of the controller and the size of memory mapped
>         registers.
> diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
> index 1b33806..38741cc 100644
> --- a/drivers/gpio/gpio-davinci.c
> +++ b/drivers/gpio/gpio-davinci.c
> @@ -413,6 +413,26 @@ static const struct irq_domain_ops davinci_gpio_irq_ops = {
>  	.xlate = irq_domain_xlate_onetwocell,
>  };
>  
> +static struct irq_chip *davinci_gpio_get_irq_chip(unsigned int irq)
> +{
> +	static struct irq_chip_type gpio_unbanked;
> +
> +	gpio_unbanked = *container_of(irq_get_chip(irq),
> +				      struct irq_chip_type, chip);
> +
> +	return &gpio_unbanked.chip;
> +};
> +
> +static struct irq_chip *keystone_gpio_get_irq_chip(unsigned int irq)
> +{
> +	static struct irq_chip gpio_unbanked;
> +
> +	gpio_unbanked = *irq_get_chip(irq);
> +	return &gpio_unbanked;
> +};
> +
> +static const struct of_device_id davinci_gpio_ids[];
> +
>  /*
>   * NOTE:  for suspend/resume, probably best to make a platform_device with
>   * suspend_late/resume_resume calls hooking into results of the set_wake()
> @@ -433,6 +453,18 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
>  	struct davinci_gpio_platform_data *pdata = dev->platform_data;
>  	struct davinci_gpio_regs __iomem *g;
>  	struct irq_domain	*irq_domain = NULL;
> +	const struct of_device_id *match;
> +	struct irq_chip *irq_chip;
> +	struct irq_chip *(*gpio_get_irq_chip)(unsigned int irq);
> +
> +	/*
> +	 * Use davinci_gpio_get_irq_chip by default to handle non DT cases
> +	 */
> +	gpio_get_irq_chip = davinci_gpio_get_irq_chip;
> +	match = of_match_device(of_match_ptr(davinci_gpio_ids),
> +				dev);
> +	if (match)
> +		gpio_get_irq_chip = match->data;

This produces a sparse warning:

  CHECK   drivers/gpio/gpio-davinci.c
drivers/gpio/gpio-davinci.c:467:35: warning: incorrect type in assignment (different modifiers)
drivers/gpio/gpio-davinci.c:467:35:    expected struct irq_chip *( *[assigned] gpio_get_irq_chip )( ... )
drivers/gpio/gpio-davinci.c:467:35:    got void const *const data

Thanks,
Sekhar

Re: [PATCH v2 2/2] gpio: davinci: reuse for Keystone SoC

[Grygorii Strashko]

On 12/22/2013 05:41 PM, Sekhar Nori wrote:
> On Wednesday 18 December 2013 03:37 PM, Grygorii Strashko wrote:
>> The similar GPIO HW block is used by keystone SoCs as
>> in Davinci SoCs.
>> Hence, reuse Davinci GPIO driver for Keystone taking into
>> account that Keystone contains ARM GIC IRQ controller which
>> is implemented using IRQ Chip.
>>
>> Documentation:
>> 	http://www.ti.com/lit/ug/sprugv1/sprugv1.pdf
>>
>> Cc: Linus Walleij <linus.walleij@linaro.org>
>> Cc: Alexandre Courbot <gnurou@gmail.com>
>> Cc: Sekhar Nori <nsekhar@ti.com>
>> Cc: devicetree@vger.kernel.org
>>
>> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
>> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
>> ---
>>   .../devicetree/bindings/gpio/gpio-davinci.txt      |    4 +-
>>   drivers/gpio/gpio-davinci.c                        |   46 ++++++++++++++++----
>>   2 files changed, 40 insertions(+), 10 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/gpio/gpio-davinci.txt b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
>> index a2e839d..4ce9862 100644
>> --- a/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
>> +++ b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
>> @@ -1,7 +1,7 @@
>> -Davinci GPIO controller bindings
>> +Davinci/Keystone GPIO controller bindings
>>
>>   Required Properties:
>> -- compatible: should be "ti,dm6441-gpio"
>> +- compatible: should be "ti,dm6441-gpio", "ti,keystone-gpio"
>>
>>   - reg: Physical base address of the controller and the size of memory mapped
>>          registers.
>> diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
>> index 1b33806..38741cc 100644
>> --- a/drivers/gpio/gpio-davinci.c
>> +++ b/drivers/gpio/gpio-davinci.c
>> @@ -413,6 +413,26 @@ static const struct irq_domain_ops davinci_gpio_irq_ops = {
>>   	.xlate = irq_domain_xlate_onetwocell,
>>   };
>>
>> +static struct irq_chip *davinci_gpio_get_irq_chip(unsigned int irq)
>> +{
>> +	static struct irq_chip_type gpio_unbanked;
>> +
>> +	gpio_unbanked = *container_of(irq_get_chip(irq),
>> +				      struct irq_chip_type, chip);
>> +
>> +	return &gpio_unbanked.chip;
>> +};
>> +
>> +static struct irq_chip *keystone_gpio_get_irq_chip(unsigned int irq)
>> +{
>> +	static struct irq_chip gpio_unbanked;
>> +
>> +	gpio_unbanked = *irq_get_chip(irq);
>> +	return &gpio_unbanked;
>> +};
>> +
>> +static const struct of_device_id davinci_gpio_ids[];
>> +
>>   /*
>>    * NOTE:  for suspend/resume, probably best to make a platform_device with
>>    * suspend_late/resume_resume calls hooking into results of the set_wake()
>> @@ -433,6 +453,18 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
>>   	struct davinci_gpio_platform_data *pdata = dev->platform_data;
>>   	struct davinci_gpio_regs __iomem *g;
>>   	struct irq_domain	*irq_domain = NULL;
>> +	const struct of_device_id *match;
>> +	struct irq_chip *irq_chip;
>> +	struct irq_chip *(*gpio_get_irq_chip)(unsigned int irq);
>> +
>> +	/*
>> +	 * Use davinci_gpio_get_irq_chip by default to handle non DT cases
>> +	 */
>> +	gpio_get_irq_chip = davinci_gpio_get_irq_chip;
>> +	match = of_match_device(of_match_ptr(davinci_gpio_ids),
>> +				dev);
>> +	if (match)
>> +		gpio_get_irq_chip = match->data;
>
> This produces a sparse warning:
>
>    CHECK   drivers/gpio/gpio-davinci.c
> drivers/gpio/gpio-davinci.c:467:35: warning: incorrect type in assignment (different modifiers)
> drivers/gpio/gpio-davinci.c:467:35:    expected struct irq_chip *( *[assigned] gpio_get_irq_chip )( ... )
> drivers/gpio/gpio-davinci.c:467:35:    got void const *const data
>

I'll fix it, thanks.

Re: [PATCH v2 0/2] gpio: davinci: reuse for keystone arch

[Linus Walleij]

On Wed, Dec 18, 2013 at 11:07 AM, Grygorii Strashko
<grygorii.strashko@ti.com> wrote:

> This series is intended to update Davinci GPIO driver and reuse
> it for Keystone SoCs, because Keystone uses the similar GPIO IP like Davinci.
> Keystone GPIO IP: supports:
> - up to 32 GPIO lines;
> - only unbanked irqs;
>
> See Documentation:
> Keystone - http://www.ti.com/lit/ug/sprugv1/sprugv1.pdf
>
> This series based on:
> https://git.kernel.org/cgit/linux/kernel/git/nsekhar/linux-davinci.git/log/?h=v3.14/gpio
>
> Changes in v2:
> - minor comments applied, no functional changes
>
> v1: https://lkml.org/lkml/2013/12/12/366

Acked-by: Linus Walleij <linus.walleij@linaro.org>

For this v2 series.

Expecting this to go in through the DaVinci tree!

Yours,
Linus Walleij

Re: [PATCH v2 0/2] gpio: davinci: reuse for keystone arch

[Santosh Shilimkar]

On Friday 20 December 2013 04:40 AM, Linus Walleij wrote:
> On Wed, Dec 18, 2013 at 11:07 AM, Grygorii Strashko
> <grygorii.strashko-l0cyMroinI0@public.gmane.org> wrote:
> 
>> This series is intended to update Davinci GPIO driver and reuse
>> it for Keystone SoCs, because Keystone uses the similar GPIO IP like Davinci.
>> Keystone GPIO IP: supports:
>> - up to 32 GPIO lines;
>> - only unbanked irqs;
>>
>> See Documentation:
>> Keystone - http://www.ti.com/lit/ug/sprugv1/sprugv1.pdf
>>
>> This series based on:
>> https://git.kernel.org/cgit/linux/kernel/git/nsekhar/linux-davinci.git/log/?h=v3.14/gpio
>>
>> Changes in v2:
>> - minor comments applied, no functional changes
>>
>> v1: https://lkml.org/lkml/2013/12/12/366
> 
> Acked-by: Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> 
Great !!

> For this v2 series.
> 
> Expecting this to go in through the DaVinci tree!
> 
Sekhar, Can you please include these to your DaVinci gpio branch ?

Regards,
Santosh