[PATCH 0/9] irq domain for gen irq chip and pl061 DT irq support

[PATCH 0/9] irq domain for gen irq chip and pl061 DT irq support

[Rob Herring]

From: Rob Herring <rob.herring@calxeda.com>

This series adds irq_domain support to generic irq chip, converts the
pl061 gpio driver to use generic irq chip, and finally adds DT irq binding
support for pl061. The pl061 driver is also fixed to use 0 for no irq
instead of -1 or NO_IRQ.

The irq_domain support should be transparent to users of generic irq
chip. Shawn Guo has tested previous version with i.MX AVIC and his fixes
have been incorporated. Any testing by other users of generic irq chip
is appreciated.

This series is also dependent on:

irqdomain: export irq_domain_simple_ops for !CONFIG_OF
http://www.spinics.net/lists/arm-kernel/msg150290.html

gpio: pl061: drop extra check for NULL platform_data
http://www.spinics.net/lists/arm-kernel/msg151701.html

Tested on highbank and built all defconfigs.

Rob

Rob Herring (9):
  dt: add empty of_get_node/of_put_node functions
  irq: ensure domain hwirq is within range for DT translate
  irq: convert generic-chip to use irq_domain
  gpio: pl061: use chained_irq_* functions in irq handler
  gpio: pl061: convert to use 0 for no irq
  ARM: realview: convert pl061 no irq to be 0 instead of -1
  gpio: pl061: convert to use generic irq chip
  gpio: pl061: enable interrupts with DT style binding
  ARM: highbank: add interrupt properties to gpio nodes

 .../devicetree/bindings/gpio/pl061-gpio.txt        |   15 +++
 arch/arm/boot/dts/highbank.dts                     |    9 ++-
 arch/arm/mach-realview/realview_eb.c               |    3 -
 arch/arm/mach-realview/realview_pb1176.c           |    3 -
 arch/arm/mach-realview/realview_pb11mp.c           |    3 -
 arch/arm/mach-realview/realview_pba8.c             |    3 -
 arch/arm/mach-realview/realview_pbx.c              |    3 -
 drivers/gpio/Kconfig                               |    1 +
 drivers/gpio/gpio-pl061.c                          |  107 +++++++++-----------
 include/linux/amba/pl061.h                         |    2 +-
 include/linux/irq.h                                |    2 +-
 include/linux/of.h                                 |   29 +++---
 kernel/irq/Kconfig                                 |    1 +
 kernel/irq/generic-chip.c                          |   57 +++++++----
 kernel/irq/irqdomain.c                             |    3 +
 15 files changed, 126 insertions(+), 115 deletions(-)

-- 
1.7.5.4

[PATCH 1/9] dt: add empty of_get_node/of_put_node functions

[Rob Herring]

From: Rob Herring <rob.herring@calxeda.com>

Add empty of_get_node/of_put_node functions for !CONFIG_OF builds.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
---
 include/linux/of.h |   29 ++++++++++++++---------------
 1 files changed, 14 insertions(+), 15 deletions(-)

diff --git a/include/linux/of.h b/include/linux/of.h
index 4948552..e291381 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -65,6 +65,20 @@ struct device_node {
 #endif
 };
 
+#if defined(CONFIG_SPARC) || !defined(CONFIG_OF)
+/* Dummy ref counting routines - to be implemented later */
+static inline struct device_node *of_node_get(struct device_node *node)
+{
+	return node;
+}
+static inline void of_node_put(struct device_node *node)
+{
+}
+#else
+extern struct device_node *of_node_get(struct device_node *node);
+extern void of_node_put(struct device_node *node);
+#endif
+
 #ifdef CONFIG_OF
 
 /* Pointer for first entry in chain of all nodes. */
@@ -95,21 +109,6 @@ static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
 
 extern struct device_node *of_find_all_nodes(struct device_node *prev);
 
-#if defined(CONFIG_SPARC)
-/* Dummy ref counting routines - to be implemented later */
-static inline struct device_node *of_node_get(struct device_node *node)
-{
-	return node;
-}
-static inline void of_node_put(struct device_node *node)
-{
-}
-
-#else
-extern struct device_node *of_node_get(struct device_node *node);
-extern void of_node_put(struct device_node *node);
-#endif
-
 /*
  * OF address retrieval & translation
  */
-- 
1.7.5.4

[PATCH 1/9] dt: add empty of_get_node/of_put_node functions

[Grant Likely]

On Wed, Dec 14, 2011 at 8:28 AM, Rob Herring <robherring2@gmail.com> wrote:
> From: Rob Herring <rob.herring@calxeda.com>
>
> Add empty of_get_node/of_put_node functions for !CONFIG_OF builds.
>
> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> Cc: Grant Likely <grant.likely@secretlab.ca>

Looks good.

> ---
> ?include/linux/of.h | ? 29 ++++++++++++++---------------
> ?1 files changed, 14 insertions(+), 15 deletions(-)
>
> diff --git a/include/linux/of.h b/include/linux/of.h
> index 4948552..e291381 100644
> --- a/include/linux/of.h
> +++ b/include/linux/of.h
> @@ -65,6 +65,20 @@ struct device_node {
> ?#endif
> ?};
>
> +#if defined(CONFIG_SPARC) || !defined(CONFIG_OF)
> +/* Dummy ref counting routines - to be implemented later */
> +static inline struct device_node *of_node_get(struct device_node *node)
> +{
> + ? ? ? return node;
> +}
> +static inline void of_node_put(struct device_node *node)
> +{
> +}
> +#else
> +extern struct device_node *of_node_get(struct device_node *node);
> +extern void of_node_put(struct device_node *node);
> +#endif
> +
> ?#ifdef CONFIG_OF
>
> ?/* Pointer for first entry in chain of all nodes. */
> @@ -95,21 +109,6 @@ static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
>
> ?extern struct device_node *of_find_all_nodes(struct device_node *prev);
>
> -#if defined(CONFIG_SPARC)
> -/* Dummy ref counting routines - to be implemented later */
> -static inline struct device_node *of_node_get(struct device_node *node)
> -{
> - ? ? ? return node;
> -}
> -static inline void of_node_put(struct device_node *node)
> -{
> -}
> -
> -#else
> -extern struct device_node *of_node_get(struct device_node *node);
> -extern void of_node_put(struct device_node *node);
> -#endif
> -
> ?/*
> ?* OF address retrieval & translation
> ?*/
> --
> 1.7.5.4
>



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

[PATCH 2/9] irq: check domain hwirq range for DT translate

[Rob Herring]

From: Rob Herring <rob.herring@calxeda.com>

A DT node may have more than 1 domain associated with it, so make sure
the hwirq number is within range when doing DT translation.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
---
 kernel/irq/irqdomain.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 200ce83..ae6441e 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -135,6 +135,9 @@ int irq_domain_simple_dt_translate(struct irq_domain *d,
 		return -EINVAL;
 	if (intsize < 1)
 		return -EINVAL;
+	if ((intspec[0] < d->hwirq_base) ||
+	    (intspec[0] >= d->hwirq_base + d->nr_irq))
+		return -EINVAL;
 
 	*out_hwirq = intspec[0];
 	*out_type = IRQ_TYPE_NONE;
-- 
1.7.5.4

[PATCH 2/9] irq: check domain hwirq range for DT translate

[Grant Likely]

On Wed, Dec 14, 2011 at 8:28 AM, Rob Herring <robherring2@gmail.com> wrote:
> From: Rob Herring <rob.herring@calxeda.com>
>
> A DT node may have more than 1 domain associated with it, so make sure
> the hwirq number is within range when doing DT translation.
>
> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>

Acked-by: Grant Likely <grant.likely@secretlab.ca>

> ---
> ?kernel/irq/irqdomain.c | ? ?3 +++
> ?1 files changed, 3 insertions(+), 0 deletions(-)
>
> diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
> index 200ce83..ae6441e 100644
> --- a/kernel/irq/irqdomain.c
> +++ b/kernel/irq/irqdomain.c
> @@ -135,6 +135,9 @@ int irq_domain_simple_dt_translate(struct irq_domain *d,
> ? ? ? ? ? ? ? ?return -EINVAL;
> ? ? ? ?if (intsize < 1)
> ? ? ? ? ? ? ? ?return -EINVAL;
> + ? ? ? if ((intspec[0] < d->hwirq_base) ||
> + ? ? ? ? ? (intspec[0] >= d->hwirq_base + d->nr_irq))
> + ? ? ? ? ? ? ? return -EINVAL;
>
> ? ? ? ?*out_hwirq = intspec[0];
> ? ? ? ?*out_type = IRQ_TYPE_NONE;
> --
> 1.7.5.4
>



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

[PATCH 2/9] irq: check domain hwirq range for DT translate

[Shawn Guo]

On Wed, Dec 14, 2011 at 09:28:51AM -0600, Rob Herring wrote:
> From: Rob Herring <rob.herring@calxeda.com>
> 
> A DT node may have more than 1 domain associated with it, so make sure
> the hwirq number is within range when doing DT translation.
> 
> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> ---

Acked-by: Shawn Guo <shawn.guo@linaro.org>

-- 
Regards,
Shawn

[PATCH 2/9] irq: check domain hwirq range for DT translate

[Cousson, Benoit]

Hi Rob,

While trying your series to take advantage of the generic-irq domain 
support for OMAP3 INTC, I realized that the following patch is breaking 
drivers that are using irq_domain_add_simple.

The point is that irq_domain_add_simple does not populate hwirq_base or 
nr_irq, so that test will always fail if the domain is created by the 
irq_domain_add_simple API.

Adding an extra parameter to provide the nr_irq should fix that.

The long term fix should be to use the generic-irq for such driver, but 
this is not the same effort, so it might worth fixing that API for the 
moment.

Regards,
Benoit

On 12/14/2011 4:28 PM, Rob Herring wrote:
> From: Rob Herring<rob.herring@calxeda.com>
>
> A DT node may have more than 1 domain associated with it, so make sure
> the hwirq number is within range when doing DT translation.
>
> Signed-off-by: Rob Herring<rob.herring@calxeda.com>
> Cc: Thomas Gleixner<tglx@linutronix.de>
> ---
>   kernel/irq/irqdomain.c |    3 +++
>   1 files changed, 3 insertions(+), 0 deletions(-)
>
> diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
> index 200ce83..ae6441e 100644
> --- a/kernel/irq/irqdomain.c
> +++ b/kernel/irq/irqdomain.c
> @@ -135,6 +135,9 @@ int irq_domain_simple_dt_translate(struct irq_domain *d,
>   		return -EINVAL;
>   	if (intsize<  1)
>   		return -EINVAL;
> +	if ((intspec[0]<  d->hwirq_base) ||
> +	    (intspec[0]>= d->hwirq_base + d->nr_irq))
> +		return -EINVAL;
>
>   	*out_hwirq = intspec[0];
>   	*out_type = IRQ_TYPE_NONE;

[PATCH 2/9] irq: check domain hwirq range for DT translate

[Rob Herring]

Benoit,

On 12/19/2011 06:41 AM, Cousson, Benoit wrote:
> Hi Rob,
> 
> While trying your series to take advantage of the generic-irq domain
> support for OMAP3 INTC, I realized that the following patch is breaking
> drivers that are using irq_domain_add_simple.
> 
> The point is that irq_domain_add_simple does not populate hwirq_base or
> nr_irq, so that test will always fail if the domain is created by the
> irq_domain_add_simple API.
> 
> Adding an extra parameter to provide the nr_irq should fix that.
> 
> The long term fix should be to use the generic-irq for such driver, but
> this is not the same effort, so it might worth fixing that API for the
> moment.
> 
> Regards,
> Benoit
> 
> On 12/14/2011 4:28 PM, Rob Herring wrote:
>> From: Rob Herring<rob.herring@calxeda.com>
>>
>> A DT node may have more than 1 domain associated with it, so make sure
>> the hwirq number is within range when doing DT translation.
>>
>> Signed-off-by: Rob Herring<rob.herring@calxeda.com>
>> Cc: Thomas Gleixner<tglx@linutronix.de>
>> ---
>>   kernel/irq/irqdomain.c |    3 +++
>>   1 files changed, 3 insertions(+), 0 deletions(-)
>>
>> diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
>> index 200ce83..ae6441e 100644
>> --- a/kernel/irq/irqdomain.c
>> +++ b/kernel/irq/irqdomain.c
>> @@ -135,6 +135,9 @@ int irq_domain_simple_dt_translate(struct
>> irq_domain *d,
>>           return -EINVAL;
>>       if (intsize<  1)
>>           return -EINVAL;
>> +    if ((intspec[0]<  d->hwirq_base) ||
>> +        (intspec[0]>= d->hwirq_base + d->nr_irq))

I think this should work:

if (d->nr_irq && ((intspec[0] < d->hwirq_base) ||
    (intspec[0] >= d->hwirq_base + d->nr_irq)))

Rob

>> +        return -EINVAL;
>>
>>       *out_hwirq = intspec[0];
>>       *out_type = IRQ_TYPE_NONE;
> 

[PATCH 2/9] irq: check domain hwirq range for DT translate

[Cousson, Benoit]

On 12/19/2011 3:23 PM, Rob Herring wrote:
> Benoit,
>
> On 12/19/2011 06:41 AM, Cousson, Benoit wrote:
>> Hi Rob,
>>
>> While trying your series to take advantage of the generic-irq domain
>> support for OMAP3 INTC, I realized that the following patch is breaking
>> drivers that are using irq_domain_add_simple.
>>
>> The point is that irq_domain_add_simple does not populate hwirq_base or
>> nr_irq, so that test will always fail if the domain is created by the
>> irq_domain_add_simple API.
>>
>> Adding an extra parameter to provide the nr_irq should fix that.
>>
>> The long term fix should be to use the generic-irq for such driver, but
>> this is not the same effort, so it might worth fixing that API for the
>> moment.
>>
>> Regards,
>> Benoit
>>
>> On 12/14/2011 4:28 PM, Rob Herring wrote:
>>> From: Rob Herring<rob.herring@calxeda.com>
>>>
>>> A DT node may have more than 1 domain associated with it, so make sure
>>> the hwirq number is within range when doing DT translation.
>>>
>>> Signed-off-by: Rob Herring<rob.herring@calxeda.com>
>>> Cc: Thomas Gleixner<tglx@linutronix.de>
>>> ---
>>>    kernel/irq/irqdomain.c |    3 +++
>>>    1 files changed, 3 insertions(+), 0 deletions(-)
>>>
>>> diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
>>> index 200ce83..ae6441e 100644
>>> --- a/kernel/irq/irqdomain.c
>>> +++ b/kernel/irq/irqdomain.c
>>> @@ -135,6 +135,9 @@ int irq_domain_simple_dt_translate(struct
>>> irq_domain *d,
>>>            return -EINVAL;
>>>        if (intsize<   1)
>>>            return -EINVAL;
>>> +    if ((intspec[0]<   d->hwirq_base) ||
>>> +        (intspec[0]>= d->hwirq_base + d->nr_irq))
>
> I think this should work:
>
> if (d->nr_irq&&  ((intspec[0]<  d->hwirq_base) ||
>      (intspec[0]>= d->hwirq_base + d->nr_irq)))

Yes, indeed. It is even simpler that fixing the API.

I can now repost the OMAP3/4 series based on this series.

Thanks,
Benoit

[PATCH 3/9] irq: convert generic-chip to use irq_domain

[Rob Herring]

From: Rob Herring <rob.herring@calxeda.com>

Add irq domain support to irq generic-chip. This enables users of
generic-chip to support dynamic irq assignment needed for DT interrupt
binding. Users must be converted to use irq_data.hwirq for determining
local interrupt numbers rather than using the Linux irq number.

irq_base is kept for now as there are a few users of it. Once they
are converted to use the irq domain, it can be removed.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
---
 include/linux/irq.h       |    2 +-
 kernel/irq/Kconfig        |    1 +
 kernel/irq/generic-chip.c |   57 ++++++++++++++++++++++++++++----------------
 3 files changed, 38 insertions(+), 22 deletions(-)

diff --git a/include/linux/irq.h b/include/linux/irq.h
index bff29c5..9ba8a30 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -664,7 +664,7 @@ struct irq_chip_generic {
 	raw_spinlock_t		lock;
 	void __iomem		*reg_base;
 	unsigned int		irq_base;
-	unsigned int		irq_cnt;
+	struct irq_domain	*domain;
 	u32			mask_cache;
 	u32			type_cache;
 	u32			polarity_cache;
diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig
index 5a38bf4..861f2fe 100644
--- a/kernel/irq/Kconfig
+++ b/kernel/irq/Kconfig
@@ -51,6 +51,7 @@ config IRQ_EDGE_EOI_HANDLER
 # Generic configurable interrupt chip implementation
 config GENERIC_IRQ_CHIP
        bool
+       select IRQ_DOMAIN
 
 # Generic irq_domain hw <--> linux irq number translation
 config IRQ_DOMAIN
diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c
index c89295a..e32fac7 100644
--- a/kernel/irq/generic-chip.c
+++ b/kernel/irq/generic-chip.c
@@ -5,6 +5,7 @@
  */
 #include <linux/io.h>
 #include <linux/irq.h>
+#include <linux/irqdomain.h>
 #include <linux/slab.h>
 #include <linux/export.h>
 #include <linux/interrupt.h>
@@ -39,7 +40,7 @@ void irq_gc_noop(struct irq_data *d)
 void irq_gc_mask_disable_reg(struct irq_data *d)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
-	u32 mask = 1 << (d->irq - gc->irq_base);
+	u32 mask = 1 << d->hwirq;
 
 	irq_gc_lock(gc);
 	irq_reg_writel(mask, gc->reg_base + cur_regs(d)->disable);
@@ -57,7 +58,7 @@ void irq_gc_mask_disable_reg(struct irq_data *d)
 void irq_gc_mask_set_bit(struct irq_data *d)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
-	u32 mask = 1 << (d->irq - gc->irq_base);
+	u32 mask = 1 << d->hwirq;
 
 	irq_gc_lock(gc);
 	gc->mask_cache |= mask;
@@ -75,7 +76,7 @@ void irq_gc_mask_set_bit(struct irq_data *d)
 void irq_gc_mask_clr_bit(struct irq_data *d)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
-	u32 mask = 1 << (d->irq - gc->irq_base);
+	u32 mask = 1 << d->hwirq;
 
 	irq_gc_lock(gc);
 	gc->mask_cache &= ~mask;
@@ -93,7 +94,7 @@ void irq_gc_mask_clr_bit(struct irq_data *d)
 void irq_gc_unmask_enable_reg(struct irq_data *d)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
-	u32 mask = 1 << (d->irq - gc->irq_base);
+	u32 mask = 1 << d->hwirq;
 
 	irq_gc_lock(gc);
 	irq_reg_writel(mask, gc->reg_base + cur_regs(d)->enable);
@@ -108,7 +109,7 @@ void irq_gc_unmask_enable_reg(struct irq_data *d)
 void irq_gc_ack_set_bit(struct irq_data *d)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
-	u32 mask = 1 << (d->irq - gc->irq_base);
+	u32 mask = 1 << d->hwirq;
 
 	irq_gc_lock(gc);
 	irq_reg_writel(mask, gc->reg_base + cur_regs(d)->ack);
@@ -122,7 +123,7 @@ void irq_gc_ack_set_bit(struct irq_data *d)
 void irq_gc_ack_clr_bit(struct irq_data *d)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
-	u32 mask = ~(1 << (d->irq - gc->irq_base));
+	u32 mask = ~(1 << d->hwirq);
 
 	irq_gc_lock(gc);
 	irq_reg_writel(mask, gc->reg_base + cur_regs(d)->ack);
@@ -136,7 +137,7 @@ void irq_gc_ack_clr_bit(struct irq_data *d)
 void irq_gc_mask_disable_reg_and_ack(struct irq_data *d)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
-	u32 mask = 1 << (d->irq - gc->irq_base);
+	u32 mask = 1 << d->hwirq;
 
 	irq_gc_lock(gc);
 	irq_reg_writel(mask, gc->reg_base + cur_regs(d)->mask);
@@ -151,7 +152,7 @@ void irq_gc_mask_disable_reg_and_ack(struct irq_data *d)
 void irq_gc_eoi(struct irq_data *d)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
-	u32 mask = 1 << (d->irq - gc->irq_base);
+	u32 mask = 1 << d->hwirq;
 
 	irq_gc_lock(gc);
 	irq_reg_writel(mask, gc->reg_base + cur_regs(d)->eoi);
@@ -169,7 +170,7 @@ void irq_gc_eoi(struct irq_data *d)
 int irq_gc_set_wake(struct irq_data *d, unsigned int on)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
-	u32 mask = 1 << (d->irq - gc->irq_base);
+	u32 mask = 1 << d->hwirq;
 
 	if (!(mask & gc->wake_enabled))
 		return -EINVAL;
@@ -201,10 +202,13 @@ irq_alloc_generic_chip(const char *name, int num_ct, unsigned int irq_base,
 	struct irq_chip_generic *gc;
 	unsigned long sz = sizeof(*gc) + num_ct * sizeof(struct irq_chip_type);
 
-	gc = kzalloc(sz, GFP_KERNEL);
+	gc = kzalloc(sz + sizeof(struct irq_domain), GFP_KERNEL);
 	if (gc) {
 		raw_spin_lock_init(&gc->lock);
 		gc->num_ct = num_ct;
+		gc->domain = (void *)gc + sz;
+		gc->domain->irq_base = irq_base;
+		gc->domain->ops = &irq_domain_simple_ops;
 		gc->irq_base = irq_base;
 		gc->reg_base = reg_base;
 		gc->chip_types->chip.name = name;
@@ -237,7 +241,7 @@ void irq_setup_generic_chip(struct irq_chip_generic *gc, u32 msk,
 			    unsigned int set)
 {
 	struct irq_chip_type *ct = gc->chip_types;
-	unsigned int i;
+	unsigned int i, irq;
 
 	raw_spin_lock(&gc_lock);
 	list_add_tail(&gc->list, &gc_list);
@@ -247,18 +251,26 @@ void irq_setup_generic_chip(struct irq_chip_generic *gc, u32 msk,
 	if (flags & IRQ_GC_INIT_MASK_CACHE)
 		gc->mask_cache = irq_reg_readl(gc->reg_base + ct->regs.mask);
 
-	for (i = gc->irq_base; msk; msk >>= 1, i++) {
+	gc->domain->nr_irq = fls(msk);
+	if ((int)gc->domain->irq_base == -1)
+		gc->domain->irq_base = irq_alloc_descs(-1, 1,
+						       gc->domain->nr_irq,
+						       numa_node_id());
+
+	irq_domain_add(gc->domain);
+
+	for (i = gc->domain->hwirq_base; msk; msk >>= 1, i++) {
 		if (!(msk & 0x01))
 			continue;
 
+		irq = irq_domain_to_irq(gc->domain, i);
 		if (flags & IRQ_GC_INIT_NESTED_LOCK)
-			irq_set_lockdep_class(i, &irq_nested_lock_class);
+			irq_set_lockdep_class(irq, &irq_nested_lock_class);
 
-		irq_set_chip_and_handler(i, &ct->chip, ct->handler);
-		irq_set_chip_data(i, gc);
-		irq_modify_status(i, clr, set);
+		irq_set_chip_and_handler(irq, &ct->chip, ct->handler);
+		irq_set_chip_data(irq, gc);
+		irq_modify_status(irq, clr, set);
 	}
-	gc->irq_cnt = i - gc->irq_base;
 }
 EXPORT_SYMBOL_GPL(irq_setup_generic_chip);
 
@@ -298,7 +310,7 @@ EXPORT_SYMBOL_GPL(irq_setup_alt_chip);
 void irq_remove_generic_chip(struct irq_chip_generic *gc, u32 msk,
 			     unsigned int clr, unsigned int set)
 {
-	unsigned int i = gc->irq_base;
+	unsigned int i = gc->domain->irq_base;
 
 	raw_spin_lock(&gc_lock);
 	list_del(&gc->list);
@@ -324,9 +336,10 @@ static int irq_gc_suspend(void)
 
 	list_for_each_entry(gc, &gc_list, list) {
 		struct irq_chip_type *ct = gc->chip_types;
+		struct irq_domain *d = gc->domain;
 
 		if (ct->chip.irq_suspend)
-			ct->chip.irq_suspend(irq_get_irq_data(gc->irq_base));
+			ct->chip.irq_suspend(irq_get_irq_data(d->irq_base));
 	}
 	return 0;
 }
@@ -337,9 +350,10 @@ static void irq_gc_resume(void)
 
 	list_for_each_entry(gc, &gc_list, list) {
 		struct irq_chip_type *ct = gc->chip_types;
+		struct irq_domain *d = gc->domain;
 
 		if (ct->chip.irq_resume)
-			ct->chip.irq_resume(irq_get_irq_data(gc->irq_base));
+			ct->chip.irq_resume(irq_get_irq_data(d->irq_base));
 	}
 }
 #else
@@ -353,9 +367,10 @@ static void irq_gc_shutdown(void)
 
 	list_for_each_entry(gc, &gc_list, list) {
 		struct irq_chip_type *ct = gc->chip_types;
+		struct irq_domain *d = gc->domain;
 
 		if (ct->chip.irq_pm_shutdown)
-			ct->chip.irq_pm_shutdown(irq_get_irq_data(gc->irq_base));
+			ct->chip.irq_pm_shutdown(irq_get_irq_data(d->irq_base));
 	}
 }
 
-- 
1.7.5.4

[PATCH 3/9] irq: convert generic-chip to use irq_domain

[Grant Likely]

On Wed, Dec 14, 2011 at 8:28 AM, Rob Herring <robherring2@gmail.com> wrote:
> From: Rob Herring <rob.herring@calxeda.com>
>
> Add irq domain support to irq generic-chip. This enables users of
> generic-chip to support dynamic irq assignment needed for DT interrupt
> binding. Users must be converted to use irq_data.hwirq for determining
> local interrupt numbers rather than using the Linux irq number.
>
> irq_base is kept for now as there are a few users of it. Once they
> are converted to use the irq domain, it can be removed.
>
> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> ---
> ?include/linux/irq.h ? ? ? | ? ?2 +-
> ?kernel/irq/Kconfig ? ? ? ?| ? ?1 +
> ?kernel/irq/generic-chip.c | ? 57 ++++++++++++++++++++++++++++----------------
> ?3 files changed, 38 insertions(+), 22 deletions(-)
>
> diff --git a/include/linux/irq.h b/include/linux/irq.h
> index bff29c5..9ba8a30 100644
> --- a/include/linux/irq.h
> +++ b/include/linux/irq.h
> @@ -664,7 +664,7 @@ struct irq_chip_generic {
> ? ? ? ?raw_spinlock_t ? ? ? ? ?lock;
> ? ? ? ?void __iomem ? ? ? ? ? ?*reg_base;
> ? ? ? ?unsigned int ? ? ? ? ? ?irq_base;
> - ? ? ? unsigned int ? ? ? ? ? ?irq_cnt;
> + ? ? ? struct irq_domain ? ? ? *domain;

Instead of making domain a pointer, why not embed the structure inside
irq_chip_generic?  I don't see a reason for keeping it separate.

After changing that you can add my Acked-by for this patch.

g.


-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

[PATCH 3/9] irq: convert generic-chip to use irq_domain

[Rob Herring]

On 12/14/2011 03:14 PM, Grant Likely wrote:
> On Wed, Dec 14, 2011 at 8:28 AM, Rob Herring <robherring2@gmail.com> wrote:
>> From: Rob Herring <rob.herring@calxeda.com>
>>
>> Add irq domain support to irq generic-chip. This enables users of
>> generic-chip to support dynamic irq assignment needed for DT interrupt
>> binding. Users must be converted to use irq_data.hwirq for determining
>> local interrupt numbers rather than using the Linux irq number.
>>
>> irq_base is kept for now as there are a few users of it. Once they
>> are converted to use the irq domain, it can be removed.
>>
>> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
>> Cc: Thomas Gleixner <tglx@linutronix.de>
>> ---
>>  include/linux/irq.h       |    2 +-
>>  kernel/irq/Kconfig        |    1 +
>>  kernel/irq/generic-chip.c |   57 ++++++++++++++++++++++++++++----------------
>>  3 files changed, 38 insertions(+), 22 deletions(-)
>>
>> diff --git a/include/linux/irq.h b/include/linux/irq.h
>> index bff29c5..9ba8a30 100644
>> --- a/include/linux/irq.h
>> +++ b/include/linux/irq.h
>> @@ -664,7 +664,7 @@ struct irq_chip_generic {
>>        raw_spinlock_t          lock;
>>        void __iomem            *reg_base;
>>        unsigned int            irq_base;
>> -       unsigned int            irq_cnt;
>> +       struct irq_domain       *domain;
> 
> Instead of making domain a pointer, why not embed the structure inside
> irq_chip_generic?  I don't see a reason for keeping it separate.
> 

There is a circular header dependency between irq.h and irq_domain.h.
Maybe I just need to put the include of irq_domain.h just above here
rather than the top of the file.

Rob

> After changing that you can add my Acked-by for this patch.
> 
> g.
> 
> 

[PATCH 3/9] irq: convert generic-chip to use irq_domain

[Grant Likely]

On Wed, Dec 14, 2011 at 2:23 PM, Rob Herring <robherring2@gmail.com> wrote:
>
>
> On 12/14/2011 03:14 PM, Grant Likely wrote:
>> On Wed, Dec 14, 2011 at 8:28 AM, Rob Herring <robherring2@gmail.com> wrote:
>>> From: Rob Herring <rob.herring@calxeda.com>
>>>
>>> Add irq domain support to irq generic-chip. This enables users of
>>> generic-chip to support dynamic irq assignment needed for DT interrupt
>>> binding. Users must be converted to use irq_data.hwirq for determining
>>> local interrupt numbers rather than using the Linux irq number.
>>>
>>> irq_base is kept for now as there are a few users of it. Once they
>>> are converted to use the irq domain, it can be removed.
>>>
>>> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
>>> Cc: Thomas Gleixner <tglx@linutronix.de>
>>> ---
>>> ?include/linux/irq.h ? ? ? | ? ?2 +-
>>> ?kernel/irq/Kconfig ? ? ? ?| ? ?1 +
>>> ?kernel/irq/generic-chip.c | ? 57 ++++++++++++++++++++++++++++----------------
>>> ?3 files changed, 38 insertions(+), 22 deletions(-)
>>>
>>> diff --git a/include/linux/irq.h b/include/linux/irq.h
>>> index bff29c5..9ba8a30 100644
>>> --- a/include/linux/irq.h
>>> +++ b/include/linux/irq.h
>>> @@ -664,7 +664,7 @@ struct irq_chip_generic {
>>> ? ? ? ?raw_spinlock_t ? ? ? ? ?lock;
>>> ? ? ? ?void __iomem ? ? ? ? ? ?*reg_base;
>>> ? ? ? ?unsigned int ? ? ? ? ? ?irq_base;
>>> - ? ? ? unsigned int ? ? ? ? ? ?irq_cnt;
>>> + ? ? ? struct irq_domain ? ? ? *domain;
>>
>> Instead of making domain a pointer, why not embed the structure inside
>> irq_chip_generic? ?I don't see a reason for keeping it separate.
>>
>
> There is a circular header dependency between irq.h and irq_domain.h.
> Maybe I just need to put the include of irq_domain.h just above here
> rather than the top of the file.

Yes, try that.  I'd rather get the dependency problem sorted out.
Alternately, problematic bit of irq_domain.h can be moved to another
header.

g.

[PATCH 3/9] irq: convert generic-chip to use irq_domain

[Rob Herring]

On 12/14/2011 03:26 PM, Grant Likely wrote:
> On Wed, Dec 14, 2011 at 2:23 PM, Rob Herring <robherring2@gmail.com> wrote:
>>
>>
>> On 12/14/2011 03:14 PM, Grant Likely wrote:
>>> On Wed, Dec 14, 2011 at 8:28 AM, Rob Herring <robherring2@gmail.com> wrote:
>>>> From: Rob Herring <rob.herring@calxeda.com>
>>>>
>>>> Add irq domain support to irq generic-chip. This enables users of
>>>> generic-chip to support dynamic irq assignment needed for DT interrupt
>>>> binding. Users must be converted to use irq_data.hwirq for determining
>>>> local interrupt numbers rather than using the Linux irq number.
>>>>
>>>> irq_base is kept for now as there are a few users of it. Once they
>>>> are converted to use the irq domain, it can be removed.
>>>>
>>>> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
>>>> Cc: Thomas Gleixner <tglx@linutronix.de>
>>>> ---
>>>>  include/linux/irq.h       |    2 +-
>>>>  kernel/irq/Kconfig        |    1 +
>>>>  kernel/irq/generic-chip.c |   57 ++++++++++++++++++++++++++++----------------
>>>>  3 files changed, 38 insertions(+), 22 deletions(-)
>>>>
>>>> diff --git a/include/linux/irq.h b/include/linux/irq.h
>>>> index bff29c5..9ba8a30 100644
>>>> --- a/include/linux/irq.h
>>>> +++ b/include/linux/irq.h
>>>> @@ -664,7 +664,7 @@ struct irq_chip_generic {
>>>>        raw_spinlock_t          lock;
>>>>        void __iomem            *reg_base;
>>>>        unsigned int            irq_base;
>>>> -       unsigned int            irq_cnt;
>>>> +       struct irq_domain       *domain;
>>>
>>> Instead of making domain a pointer, why not embed the structure inside
>>> irq_chip_generic?  I don't see a reason for keeping it separate.
>>>
>>
>> There is a circular header dependency between irq.h and irq_domain.h.
>> Maybe I just need to put the include of irq_domain.h just above here
>> rather than the top of the file.
> 
> Yes, try that.  I'd rather get the dependency problem sorted out.
> Alternately, problematic bit of irq_domain.h can be moved to another
> header.
> 
Things always start out so simple...

Removing irq.h from irqdomain.h fixes my original problem. However, that
breaks on x86 since x86 has it's own struct irq_domain. Some ifdef'ing
could fix it since x86 doesn't use irq_chip_generic. Didn't you have
converting x86 in your original irq domain patches?

Rob

[PATCH 3/9] irq: convert generic-chip to use irq_domain

[Shawn Guo]

On Wed, Dec 14, 2011 at 09:28:52AM -0600, Rob Herring wrote:
> From: Rob Herring <rob.herring@calxeda.com>
> 
> Add irq domain support to irq generic-chip. This enables users of
> generic-chip to support dynamic irq assignment needed for DT interrupt
> binding. Users must be converted to use irq_data.hwirq for determining
> local interrupt numbers rather than using the Linux irq number.
> 
> irq_base is kept for now as there are a few users of it. Once they
> are converted to use the irq domain, it can be removed.
> 
> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> ---

Tested-by: Shawn Guo <shawn.guo@linaro.org>

-- 
Regards,
Shawn

[PATCH 3/9] irq: convert generic-chip to use irq_domain

[Shawn Guo]

On Thu, Dec 15, 2011 at 01:25:20PM +0800, Shawn Guo wrote:
> On Wed, Dec 14, 2011 at 09:28:52AM -0600, Rob Herring wrote:
> > From: Rob Herring <rob.herring@calxeda.com>
> > 
> > Add irq domain support to irq generic-chip. This enables users of
> > generic-chip to support dynamic irq assignment needed for DT interrupt
> > binding. Users must be converted to use irq_data.hwirq for determining
> > local interrupt numbers rather than using the Linux irq number.
> > 
> > irq_base is kept for now as there are a few users of it. Once they
> > are converted to use the irq domain, it can be removed.
> > 
> > Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> > Cc: Thomas Gleixner <tglx@linutronix.de>
> > ---
> 
> Tested-by: Shawn Guo <shawn.guo@linaro.org>
> 
Sorry, I have to take that tag back after I correct my test setup.
It does not work for imx5 TZIC case, because the following change
I suggested before is missed.

diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index eb763f7..2a2aac1 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -39,7 +39,7 @@ void irq_domain_add(struct irq_domain *domain)
                        return;
                }
                d->domain = domain;
-               d->hwirq = hwirq;
+               d->hwirq = hwirq - domain->hwirq_base;
        }

        mutex_lock(&irq_domain_mutex);

-- 
Regards,
Shawn

[PATCH 3/9] irq: convert generic-chip to use irq_domain

[Rob Herring]

On 12/14/2011 11:55 PM, Shawn Guo wrote:
> On Thu, Dec 15, 2011 at 01:25:20PM +0800, Shawn Guo wrote:
>> On Wed, Dec 14, 2011 at 09:28:52AM -0600, Rob Herring wrote:
>>> From: Rob Herring <rob.herring@calxeda.com>
>>>
>>> Add irq domain support to irq generic-chip. This enables users of
>>> generic-chip to support dynamic irq assignment needed for DT interrupt
>>> binding. Users must be converted to use irq_data.hwirq for determining
>>> local interrupt numbers rather than using the Linux irq number.
>>>
>>> irq_base is kept for now as there are a few users of it. Once they
>>> are converted to use the irq domain, it can be removed.
>>>
>>> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
>>> Cc: Thomas Gleixner <tglx@linutronix.de>
>>> ---
>>
>> Tested-by: Shawn Guo <shawn.guo@linaro.org>
>>
> Sorry, I have to take that tag back after I correct my test setup.
> It does not work for imx5 TZIC case, because the following change
> I suggested before is missed.
> 
> diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
> index eb763f7..2a2aac1 100644
> --- a/kernel/irq/irqdomain.c
> +++ b/kernel/irq/irqdomain.c
> @@ -39,7 +39,7 @@ void irq_domain_add(struct irq_domain *domain)
>                         return;
>                 }
>                 d->domain = domain;
> -               d->hwirq = hwirq;
> +               d->hwirq = hwirq - domain->hwirq_base;

This is a problem. It entirely defeats the point of hwirq_base and it
would break the GIC. We need to fix this in the generic irq chip.

Rob

>         }
> 
>         mutex_lock(&irq_domain_mutex);
> 

[PATCH 3/9] irq: convert generic-chip to use irq_domain

[Rob Herring]

Shawn,

On 12/15/2011 07:39 AM, Rob Herring wrote:
> On 12/14/2011 11:55 PM, Shawn Guo wrote:
>> On Thu, Dec 15, 2011 at 01:25:20PM +0800, Shawn Guo wrote:
>>> On Wed, Dec 14, 2011 at 09:28:52AM -0600, Rob Herring wrote:
>>>> From: Rob Herring <rob.herring@calxeda.com>
>>>>
>>>> Add irq domain support to irq generic-chip. This enables users of
>>>> generic-chip to support dynamic irq assignment needed for DT interrupt
>>>> binding. Users must be converted to use irq_data.hwirq for determining
>>>> local interrupt numbers rather than using the Linux irq number.
>>>>
>>>> irq_base is kept for now as there are a few users of it. Once they
>>>> are converted to use the irq domain, it can be removed.
>>>>
>>>> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
>>>> Cc: Thomas Gleixner <tglx@linutronix.de>
>>>> ---
>>>
>>> Tested-by: Shawn Guo <shawn.guo@linaro.org>
>>>
>> Sorry, I have to take that tag back after I correct my test setup.
>> It does not work for imx5 TZIC case, because the following change
>> I suggested before is missed.
>>
>> diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
>> index eb763f7..2a2aac1 100644
>> --- a/kernel/irq/irqdomain.c
>> +++ b/kernel/irq/irqdomain.c
>> @@ -39,7 +39,7 @@ void irq_domain_add(struct irq_domain *domain)
>>                         return;
>>                 }
>>                 d->domain = domain;
>> -               d->hwirq = hwirq;
>> +               d->hwirq = hwirq - domain->hwirq_base;
> 
> This is a problem. It entirely defeats the point of hwirq_base and it
> would break the GIC. We need to fix this in the generic irq chip.
> 

I think I found a fix. Can you try 's/d->hwirq/(d->hwirq % 32)/' in
generic-chip.c.

Rob

[PATCH 3/9] irq: convert generic-chip to use irq_domain

[Shawn Guo]

On Thu, Dec 15, 2011 at 07:56:41AM -0600, Rob Herring wrote:
[...]
> >> diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
> >> index eb763f7..2a2aac1 100644
> >> --- a/kernel/irq/irqdomain.c
> >> +++ b/kernel/irq/irqdomain.c
> >> @@ -39,7 +39,7 @@ void irq_domain_add(struct irq_domain *domain)
> >>                         return;
> >>                 }
> >>                 d->domain = domain;
> >> -               d->hwirq = hwirq;
> >> +               d->hwirq = hwirq - domain->hwirq_base;
> > 
> > This is a problem. It entirely defeats the point of hwirq_base and it
> > would break the GIC. We need to fix this in the generic irq chip.
> > 
> 
> I think I found a fix. Can you try 's/d->hwirq/(d->hwirq % 32)/' in
> generic-chip.c.
> 
Needless to try (will try later), this will work.  But again, what do
we need to change 'd->irq - d->irq_base' at all?

-- 
Regards,
Shawn

[PATCH 3/9] irq: convert generic-chip to use irq_domain

[Shawn Guo]

On Thu, Dec 15, 2011 at 07:56:41AM -0600, Rob Herring wrote:
[...]
> I think I found a fix. Can you try 's/d->hwirq/(d->hwirq % 32)/' in
> generic-chip.c.
> 
Tried, it works.

-- 
Regards,
Shawn

[PATCH 3/9] irq: convert generic-chip to use irq_domain

[Grant Likely]

On Thu, Dec 15, 2011 at 6:56 AM, Rob Herring <robherring2@gmail.com> wrote:
> Shawn,
>
> On 12/15/2011 07:39 AM, Rob Herring wrote:
>> On 12/14/2011 11:55 PM, Shawn Guo wrote:
>>> On Thu, Dec 15, 2011 at 01:25:20PM +0800, Shawn Guo wrote:
>>>> On Wed, Dec 14, 2011 at 09:28:52AM -0600, Rob Herring wrote:
>>>>> From: Rob Herring <rob.herring@calxeda.com>
>>>>>
>>>>> Add irq domain support to irq generic-chip. This enables users of
>>>>> generic-chip to support dynamic irq assignment needed for DT interrupt
>>>>> binding. Users must be converted to use irq_data.hwirq for determining
>>>>> local interrupt numbers rather than using the Linux irq number.
>>>>>
>>>>> irq_base is kept for now as there are a few users of it. Once they
>>>>> are converted to use the irq domain, it can be removed.
>>>>>
>>>>> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
>>>>> Cc: Thomas Gleixner <tglx@linutronix.de>
>>>>> ---
>>>>
>>>> Tested-by: Shawn Guo <shawn.guo@linaro.org>
>>>>
>>> Sorry, I have to take that tag back after I correct my test setup.
>>> It does not work for imx5 TZIC case, because the following change
>>> I suggested before is missed.
>>>
>>> diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
>>> index eb763f7..2a2aac1 100644
>>> --- a/kernel/irq/irqdomain.c
>>> +++ b/kernel/irq/irqdomain.c
>>> @@ -39,7 +39,7 @@ void irq_domain_add(struct irq_domain *domain)
>>> ? ? ? ? ? ? ? ? ? ? ? ? return;
>>> ? ? ? ? ? ? ? ? }
>>> ? ? ? ? ? ? ? ? d->domain = domain;
>>> - ? ? ? ? ? ? ? d->hwirq = hwirq;
>>> + ? ? ? ? ? ? ? d->hwirq = hwirq - domain->hwirq_base;
>>
>> This is a problem. It entirely defeats the point of hwirq_base and it
>> would break the GIC. We need to fix this in the generic irq chip.
>>
>
> I think I found a fix. Can you try 's/d->hwirq/(d->hwirq % 32)/' in
> generic-chip.c.

Ugh, but that hard codes an assumption that a domain cannot have more
that 32 irqs.

/me goes to dig into irq_domain code...

g.

[PATCH 3/9] irq: convert generic-chip to use irq_domain

[Rob Herring]

On 12/15/2011 09:55 AM, Grant Likely wrote:
> On Thu, Dec 15, 2011 at 6:56 AM, Rob Herring <robherring2@gmail.com> wrote:
>> Shawn,
>>
>> On 12/15/2011 07:39 AM, Rob Herring wrote:
>>> On 12/14/2011 11:55 PM, Shawn Guo wrote:
>>>> On Thu, Dec 15, 2011 at 01:25:20PM +0800, Shawn Guo wrote:
>>>>> On Wed, Dec 14, 2011 at 09:28:52AM -0600, Rob Herring wrote:
>>>>>> From: Rob Herring <rob.herring@calxeda.com>
>>>>>>
>>>>>> Add irq domain support to irq generic-chip. This enables users of
>>>>>> generic-chip to support dynamic irq assignment needed for DT interrupt
>>>>>> binding. Users must be converted to use irq_data.hwirq for determining
>>>>>> local interrupt numbers rather than using the Linux irq number.
>>>>>>
>>>>>> irq_base is kept for now as there are a few users of it. Once they
>>>>>> are converted to use the irq domain, it can be removed.
>>>>>>
>>>>>> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
>>>>>> Cc: Thomas Gleixner <tglx@linutronix.de>
>>>>>> ---
>>>>>
>>>>> Tested-by: Shawn Guo <shawn.guo@linaro.org>
>>>>>
>>>> Sorry, I have to take that tag back after I correct my test setup.
>>>> It does not work for imx5 TZIC case, because the following change
>>>> I suggested before is missed.
>>>>
>>>> diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
>>>> index eb763f7..2a2aac1 100644
>>>> --- a/kernel/irq/irqdomain.c
>>>> +++ b/kernel/irq/irqdomain.c
>>>> @@ -39,7 +39,7 @@ void irq_domain_add(struct irq_domain *domain)
>>>>                         return;
>>>>                 }
>>>>                 d->domain = domain;
>>>> -               d->hwirq = hwirq;
>>>> +               d->hwirq = hwirq - domain->hwirq_base;
>>>
>>> This is a problem. It entirely defeats the point of hwirq_base and it
>>> would break the GIC. We need to fix this in the generic irq chip.
>>>
>>
>> I think I found a fix. Can you try 's/d->hwirq/(d->hwirq % 32)/' in
>> generic-chip.c.
> 
> Ugh, but that hard codes an assumption that a domain cannot have more
> that 32 irqs.
> 
> /me goes to dig into irq_domain code...

No, it hard codes that generic irq chip is 32 interrupts at most which
is already the case. That's why the TZIC uses 5 generic irq chip instances.

Rob

[PATCH 3/9] irq: convert generic-chip to use irq_domain

[Grant Likely]

On Thu, Dec 15, 2011 at 9:17 AM, Rob Herring <robherring2@gmail.com> wrote:
> On 12/15/2011 09:55 AM, Grant Likely wrote:
>> On Thu, Dec 15, 2011 at 6:56 AM, Rob Herring <robherring2@gmail.com> wrote:
>>> Shawn,
>>>
>>> On 12/15/2011 07:39 AM, Rob Herring wrote:
>>>> On 12/14/2011 11:55 PM, Shawn Guo wrote:
>>>>> On Thu, Dec 15, 2011 at 01:25:20PM +0800, Shawn Guo wrote:
>>>>>> On Wed, Dec 14, 2011 at 09:28:52AM -0600, Rob Herring wrote:
>>>>>>> From: Rob Herring <rob.herring@calxeda.com>
>>>>>>>
>>>>>>> Add irq domain support to irq generic-chip. This enables users of
>>>>>>> generic-chip to support dynamic irq assignment needed for DT interrupt
>>>>>>> binding. Users must be converted to use irq_data.hwirq for determining
>>>>>>> local interrupt numbers rather than using the Linux irq number.
>>>>>>>
>>>>>>> irq_base is kept for now as there are a few users of it. Once they
>>>>>>> are converted to use the irq domain, it can be removed.
>>>>>>>
>>>>>>> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
>>>>>>> Cc: Thomas Gleixner <tglx@linutronix.de>
>>>>>>> ---
>>>>>>
>>>>>> Tested-by: Shawn Guo <shawn.guo@linaro.org>
>>>>>>
>>>>> Sorry, I have to take that tag back after I correct my test setup.
>>>>> It does not work for imx5 TZIC case, because the following change
>>>>> I suggested before is missed.
>>>>>
>>>>> diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
>>>>> index eb763f7..2a2aac1 100644
>>>>> --- a/kernel/irq/irqdomain.c
>>>>> +++ b/kernel/irq/irqdomain.c
>>>>> @@ -39,7 +39,7 @@ void irq_domain_add(struct irq_domain *domain)
>>>>> ? ? ? ? ? ? ? ? ? ? ? ? return;
>>>>> ? ? ? ? ? ? ? ? }
>>>>> ? ? ? ? ? ? ? ? d->domain = domain;
>>>>> - ? ? ? ? ? ? ? d->hwirq = hwirq;
>>>>> + ? ? ? ? ? ? ? d->hwirq = hwirq - domain->hwirq_base;
>>>>
>>>> This is a problem. It entirely defeats the point of hwirq_base and it
>>>> would break the GIC. We need to fix this in the generic irq chip.
>>>>
>>>
>>> I think I found a fix. Can you try 's/d->hwirq/(d->hwirq % 32)/' in
>>> generic-chip.c.
>>
>> Ugh, but that hard codes an assumption that a domain cannot have more
>> that 32 irqs.
>>
>> /me goes to dig into irq_domain code...
>
> No, it hard codes that generic irq chip is 32 interrupts at most which
> is already the case. That's why the TZIC uses 5 generic irq chip instances.

Oops, you're right.  I wasn't paying close enough attention. Sorry for
the noise.

g.

[PATCH 3/9] irq: convert generic-chip to use irq_domain

[Shawn Guo]

On Thu, Dec 15, 2011 at 07:39:37AM -0600, Rob Herring wrote:
> On 12/14/2011 11:55 PM, Shawn Guo wrote:
> > On Thu, Dec 15, 2011 at 01:25:20PM +0800, Shawn Guo wrote:
> >> On Wed, Dec 14, 2011 at 09:28:52AM -0600, Rob Herring wrote:
> >>> From: Rob Herring <rob.herring@calxeda.com>
> >>>
> >>> Add irq domain support to irq generic-chip. This enables users of
> >>> generic-chip to support dynamic irq assignment needed for DT interrupt
> >>> binding. Users must be converted to use irq_data.hwirq for determining
> >>> local interrupt numbers rather than using the Linux irq number.
> >>>
> >>> irq_base is kept for now as there are a few users of it. Once they
> >>> are converted to use the irq domain, it can be removed.
> >>>
> >>> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> >>> Cc: Thomas Gleixner <tglx@linutronix.de>
> >>> ---
> >>
> >> Tested-by: Shawn Guo <shawn.guo@linaro.org>
> >>
> > Sorry, I have to take that tag back after I correct my test setup.
> > It does not work for imx5 TZIC case, because the following change
> > I suggested before is missed.
> > 
> > diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
> > index eb763f7..2a2aac1 100644
> > --- a/kernel/irq/irqdomain.c
> > +++ b/kernel/irq/irqdomain.c
> > @@ -39,7 +39,7 @@ void irq_domain_add(struct irq_domain *domain)
> >                         return;
> >                 }
> >                 d->domain = domain;
> > -               d->hwirq = hwirq;
> > +               d->hwirq = hwirq - domain->hwirq_base;
> 
> This is a problem. It entirely defeats the point of hwirq_base and it
> would break the GIC. We need to fix this in the generic irq chip.
> 
Actually I do not quite understand why we need to make the following
change all over generic-chip.c.

-       u32 mask = 1 << (d->irq - gc->irq_base);
+       u32 mask = 1 << d->hwirq;

Though d->irq is the Linux irq number, "d->irq - gc->irq_base" is
really just what we need here.

-- 
Regards,
Shawn

[PATCH 3/9] irq: convert generic-chip to use irq_domain

[Rob Herring]

On 12/15/2011 08:08 AM, Shawn Guo wrote:
> On Thu, Dec 15, 2011 at 07:39:37AM -0600, Rob Herring wrote:
>> On 12/14/2011 11:55 PM, Shawn Guo wrote:
>>> On Thu, Dec 15, 2011 at 01:25:20PM +0800, Shawn Guo wrote:
>>>> On Wed, Dec 14, 2011 at 09:28:52AM -0600, Rob Herring wrote:
>>>>> From: Rob Herring <rob.herring@calxeda.com>
>>>>>
>>>>> Add irq domain support to irq generic-chip. This enables users of
>>>>> generic-chip to support dynamic irq assignment needed for DT interrupt
>>>>> binding. Users must be converted to use irq_data.hwirq for determining
>>>>> local interrupt numbers rather than using the Linux irq number.
>>>>>
>>>>> irq_base is kept for now as there are a few users of it. Once they
>>>>> are converted to use the irq domain, it can be removed.
>>>>>
>>>>> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
>>>>> Cc: Thomas Gleixner <tglx@linutronix.de>
>>>>> ---
>>>>
>>>> Tested-by: Shawn Guo <shawn.guo@linaro.org>
>>>>
>>> Sorry, I have to take that tag back after I correct my test setup.
>>> It does not work for imx5 TZIC case, because the following change
>>> I suggested before is missed.
>>>
>>> diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
>>> index eb763f7..2a2aac1 100644
>>> --- a/kernel/irq/irqdomain.c
>>> +++ b/kernel/irq/irqdomain.c
>>> @@ -39,7 +39,7 @@ void irq_domain_add(struct irq_domain *domain)
>>>                         return;
>>>                 }
>>>                 d->domain = domain;
>>> -               d->hwirq = hwirq;
>>> +               d->hwirq = hwirq - domain->hwirq_base;
>>
>> This is a problem. It entirely defeats the point of hwirq_base and it
>> would break the GIC. We need to fix this in the generic irq chip.
>>
> Actually I do not quite understand why we need to make the following
> change all over generic-chip.c.
> 
> -       u32 mask = 1 << (d->irq - gc->irq_base);
> +       u32 mask = 1 << d->hwirq;
> 
> Though d->irq is the Linux irq number, "d->irq - gc->irq_base" is
> really just what we need here.

That's assuming a linear mapping between the irq and hwirq. What if we
start allocating irq_descs on demand within a domain? Then there would
be no way to convert.

Rob

[PATCH 4/9] gpio: pl061: use chained_irq_* functions in irq handler

[Rob Herring]

From: Rob Herring <rob.herring@calxeda.com>

Use chained_irq_enter/exit helper functions instead of direct pointer
accesses. This is needed for generic irq chip conversion.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.ml.walleij@gmail.com>
---
 drivers/gpio/gpio-pl061.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
index 4102f63..0f718f9 100644
--- a/drivers/gpio/gpio-pl061.c
+++ b/drivers/gpio/gpio-pl061.c
@@ -23,6 +23,7 @@
 #include <linux/amba/bus.h>
 #include <linux/amba/pl061.h>
 #include <linux/slab.h>
+#include <asm/mach/irq.h>
 
 #define GPIODIR 0x400
 #define GPIOIS  0x404
@@ -211,8 +212,9 @@ static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
 	struct list_head *chip_list = irq_get_handler_data(irq);
 	struct list_head *ptr;
 	struct pl061_gpio *chip;
+	struct irq_chip *irqchip = irq_desc_get_chip(desc);
 
-	desc->irq_data.chip->irq_ack(&desc->irq_data);
+	chained_irq_enter(irqchip, desc);
 	list_for_each(ptr, chip_list) {
 		unsigned long pending;
 		int offset;
@@ -227,7 +229,7 @@ static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
 		for_each_set_bit(offset, &pending, PL061_GPIO_NR)
 			generic_handle_irq(pl061_to_irq(&chip->gc, offset));
 	}
-	desc->irq_data.chip->irq_unmask(&desc->irq_data);
+	chained_irq_exit(irqchip, desc);
 }
 
 static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
-- 
1.7.5.4

[PATCH 4/9] gpio: pl061: use chained_irq_* functions in irq handler

[Grant Likely]

On Wed, Dec 14, 2011 at 8:28 AM, Rob Herring <robherring2@gmail.com> wrote:
> From: Rob Herring <rob.herring@calxeda.com>
>
> Use chained_irq_enter/exit helper functions instead of direct pointer
> accesses. This is needed for generic irq chip conversion.
>
> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> Cc: Grant Likely <grant.likely@secretlab.ca>

Acked-by: Grant Likely <grant.likely@secretlab.ca>

> Cc: Linus Walleij <linus.ml.walleij@gmail.com>
> ---
> ?drivers/gpio/gpio-pl061.c | ? ?6 ++++--
> ?1 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
> index 4102f63..0f718f9 100644
> --- a/drivers/gpio/gpio-pl061.c
> +++ b/drivers/gpio/gpio-pl061.c
> @@ -23,6 +23,7 @@
> ?#include <linux/amba/bus.h>
> ?#include <linux/amba/pl061.h>
> ?#include <linux/slab.h>
> +#include <asm/mach/irq.h>
>
> ?#define GPIODIR 0x400
> ?#define GPIOIS ?0x404
> @@ -211,8 +212,9 @@ static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
> ? ? ? ?struct list_head *chip_list = irq_get_handler_data(irq);
> ? ? ? ?struct list_head *ptr;
> ? ? ? ?struct pl061_gpio *chip;
> + ? ? ? struct irq_chip *irqchip = irq_desc_get_chip(desc);
>
> - ? ? ? desc->irq_data.chip->irq_ack(&desc->irq_data);
> + ? ? ? chained_irq_enter(irqchip, desc);
> ? ? ? ?list_for_each(ptr, chip_list) {
> ? ? ? ? ? ? ? ?unsigned long pending;
> ? ? ? ? ? ? ? ?int offset;
> @@ -227,7 +229,7 @@ static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
> ? ? ? ? ? ? ? ?for_each_set_bit(offset, &pending, PL061_GPIO_NR)
> ? ? ? ? ? ? ? ? ? ? ? ?generic_handle_irq(pl061_to_irq(&chip->gc, offset));
> ? ? ? ?}
> - ? ? ? desc->irq_data.chip->irq_unmask(&desc->irq_data);
> + ? ? ? chained_irq_exit(irqchip, desc);
> ?}
>
> ?static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
> --
> 1.7.5.4
>



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

[PATCH 5/9] gpio: pl061: convert to use 0 for no irq

[Rob Herring]

From: Rob Herring <rob.herring@calxeda.com>

We don't want drivers using NO_IRQ, so remove its use. For now, 0 or
-1 means no irq until platforms are converted to use 0.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.ml.walleij@gmail.com>
---
 drivers/gpio/gpio-pl061.c  |    8 ++++----
 include/linux/amba/pl061.h |    2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
index 0f718f9..fe19dec 100644
--- a/drivers/gpio/gpio-pl061.c
+++ b/drivers/gpio/gpio-pl061.c
@@ -53,7 +53,7 @@ struct pl061_gpio {
 	spinlock_t		irq_lock;	/* IRQ registers */
 
 	void __iomem		*base;
-	unsigned		irq_base;
+	int			irq_base;
 	struct gpio_chip	gc;
 };
 
@@ -119,7 +119,7 @@ static int pl061_to_irq(struct gpio_chip *gc, unsigned offset)
 {
 	struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc);
 
-	if (chip->irq_base == NO_IRQ)
+	if (chip->irq_base <= 0)
 		return -EINVAL;
 
 	return chip->irq_base + offset;
@@ -250,7 +250,7 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
 		chip->irq_base = pdata->irq_base;
 	} else if (dev->dev.of_node) {
 		chip->gc.base = -1;
-		chip->irq_base = NO_IRQ;
+		chip->irq_base = 0;
 	} else {
 		ret = -ENODEV;
 		goto free_mem;
@@ -290,7 +290,7 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
 	 * irq_chip support
 	 */
 
-	if (chip->irq_base == NO_IRQ)
+	if (chip->irq_base <= 0)
 		return 0;
 
 	writeb(0, chip->base + GPIOIE); /* disable irqs */
diff --git a/include/linux/amba/pl061.h b/include/linux/amba/pl061.h
index 2412af9..fb83c04 100644
--- a/include/linux/amba/pl061.h
+++ b/include/linux/amba/pl061.h
@@ -7,7 +7,7 @@ struct pl061_platform_data {
 	unsigned	gpio_base;
 
 	/* number of the first IRQ.
-	 * If the IRQ functionality in not desired this must be set to NO_IRQ.
+	 * If the IRQ functionality in not desired this must be set to 0.
 	 */
 	unsigned	irq_base;
 
-- 
1.7.5.4

[PATCH 5/9] gpio: pl061: convert to use 0 for no irq

[Grant Likely]

On Wed, Dec 14, 2011 at 8:28 AM, Rob Herring <robherring2@gmail.com> wrote:
> From: Rob Herring <rob.herring@calxeda.com>
>
> We don't want drivers using NO_IRQ, so remove its use. For now, 0 or
> -1 means no irq until platforms are converted to use 0.
>
> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> Cc: Grant Likely <grant.likely@secretlab.ca>

Acked-by: Grant Likely <grant.likely@secretlab.ca>

> Cc: Linus Walleij <linus.ml.walleij@gmail.com>
> ---
> ?drivers/gpio/gpio-pl061.c ?| ? ?8 ++++----
> ?include/linux/amba/pl061.h | ? ?2 +-
> ?2 files changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
> index 0f718f9..fe19dec 100644
> --- a/drivers/gpio/gpio-pl061.c
> +++ b/drivers/gpio/gpio-pl061.c
> @@ -53,7 +53,7 @@ struct pl061_gpio {
> ? ? ? ?spinlock_t ? ? ? ? ? ? ?irq_lock; ? ? ? /* IRQ registers */
>
> ? ? ? ?void __iomem ? ? ? ? ? ?*base;
> - ? ? ? unsigned ? ? ? ? ? ? ? ?irq_base;
> + ? ? ? int ? ? ? ? ? ? ? ? ? ? irq_base;
> ? ? ? ?struct gpio_chip ? ? ? ?gc;
> ?};
>
> @@ -119,7 +119,7 @@ static int pl061_to_irq(struct gpio_chip *gc, unsigned offset)
> ?{
> ? ? ? ?struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc);
>
> - ? ? ? if (chip->irq_base == NO_IRQ)
> + ? ? ? if (chip->irq_base <= 0)
> ? ? ? ? ? ? ? ?return -EINVAL;
>
> ? ? ? ?return chip->irq_base + offset;
> @@ -250,7 +250,7 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
> ? ? ? ? ? ? ? ?chip->irq_base = pdata->irq_base;
> ? ? ? ?} else if (dev->dev.of_node) {
> ? ? ? ? ? ? ? ?chip->gc.base = -1;
> - ? ? ? ? ? ? ? chip->irq_base = NO_IRQ;
> + ? ? ? ? ? ? ? chip->irq_base = 0;
> ? ? ? ?} else {
> ? ? ? ? ? ? ? ?ret = -ENODEV;
> ? ? ? ? ? ? ? ?goto free_mem;
> @@ -290,7 +290,7 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
> ? ? ? ? * irq_chip support
> ? ? ? ? */
>
> - ? ? ? if (chip->irq_base == NO_IRQ)
> + ? ? ? if (chip->irq_base <= 0)
> ? ? ? ? ? ? ? ?return 0;
>
> ? ? ? ?writeb(0, chip->base + GPIOIE); /* disable irqs */
> diff --git a/include/linux/amba/pl061.h b/include/linux/amba/pl061.h
> index 2412af9..fb83c04 100644
> --- a/include/linux/amba/pl061.h
> +++ b/include/linux/amba/pl061.h
> @@ -7,7 +7,7 @@ struct pl061_platform_data {
> ? ? ? ?unsigned ? ? ? ?gpio_base;
>
> ? ? ? ?/* number of the first IRQ.
> - ? ? ? ?* If the IRQ functionality in not desired this must be set to NO_IRQ.
> + ? ? ? ?* If the IRQ functionality in not desired this must be set to 0.
> ? ? ? ? */
> ? ? ? ?unsigned ? ? ? ?irq_base;
>
> --
> 1.7.5.4
>



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

[PATCH 6/9] ARM: realview: convert pl061 no irq to 0 instead of -1

[Rob Herring]

From: Rob Herring <rob.herring@calxeda.com>

Drivers should use 0 for no irq, so convert realview platforms pl061
platform_data over to use 0.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
---
 arch/arm/mach-realview/realview_eb.c     |    3 ---
 arch/arm/mach-realview/realview_pb1176.c |    3 ---
 arch/arm/mach-realview/realview_pb11mp.c |    3 ---
 arch/arm/mach-realview/realview_pba8.c   |    3 ---
 arch/arm/mach-realview/realview_pbx.c    |    3 ---
 5 files changed, 0 insertions(+), 15 deletions(-)

diff --git a/arch/arm/mach-realview/realview_eb.c b/arch/arm/mach-realview/realview_eb.c
index 026c66a..57f5bac 100644
--- a/arch/arm/mach-realview/realview_eb.c
+++ b/arch/arm/mach-realview/realview_eb.c
@@ -117,17 +117,14 @@ static void __init realview_eb_map_io(void)
 
 static struct pl061_platform_data gpio0_plat_data = {
 	.gpio_base	= 0,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio1_plat_data = {
 	.gpio_base	= 8,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio2_plat_data = {
 	.gpio_base	= 16,
-	.irq_base	= -1,
 };
 
 static struct pl022_ssp_controller ssp0_plat_data = {
diff --git a/arch/arm/mach-realview/realview_pb1176.c b/arch/arm/mach-realview/realview_pb1176.c
index c057540..2267696 100644
--- a/arch/arm/mach-realview/realview_pb1176.c
+++ b/arch/arm/mach-realview/realview_pb1176.c
@@ -113,17 +113,14 @@ static void __init realview_pb1176_map_io(void)
 
 static struct pl061_platform_data gpio0_plat_data = {
 	.gpio_base	= 0,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio1_plat_data = {
 	.gpio_base	= 8,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio2_plat_data = {
 	.gpio_base	= 16,
-	.irq_base	= -1,
 };
 
 static struct pl022_ssp_controller ssp0_plat_data = {
diff --git a/arch/arm/mach-realview/realview_pb11mp.c b/arch/arm/mach-realview/realview_pb11mp.c
index 671ad6d..8622dbb 100644
--- a/arch/arm/mach-realview/realview_pb11mp.c
+++ b/arch/arm/mach-realview/realview_pb11mp.c
@@ -112,17 +112,14 @@ static void __init realview_pb11mp_map_io(void)
 
 static struct pl061_platform_data gpio0_plat_data = {
 	.gpio_base	= 0,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio1_plat_data = {
 	.gpio_base	= 8,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio2_plat_data = {
 	.gpio_base	= 16,
-	.irq_base	= -1,
 };
 
 static struct pl022_ssp_controller ssp0_plat_data = {
diff --git a/arch/arm/mach-realview/realview_pba8.c b/arch/arm/mach-realview/realview_pba8.c
index cbf22df..6f9511d 100644
--- a/arch/arm/mach-realview/realview_pba8.c
+++ b/arch/arm/mach-realview/realview_pba8.c
@@ -102,17 +102,14 @@ static void __init realview_pba8_map_io(void)
 
 static struct pl061_platform_data gpio0_plat_data = {
 	.gpio_base	= 0,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio1_plat_data = {
 	.gpio_base	= 8,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio2_plat_data = {
 	.gpio_base	= 16,
-	.irq_base	= -1,
 };
 
 static struct pl022_ssp_controller ssp0_plat_data = {
diff --git a/arch/arm/mach-realview/realview_pbx.c b/arch/arm/mach-realview/realview_pbx.c
index 63c4114..be3a01f 100644
--- a/arch/arm/mach-realview/realview_pbx.c
+++ b/arch/arm/mach-realview/realview_pbx.c
@@ -124,17 +124,14 @@ static void __init realview_pbx_map_io(void)
 
 static struct pl061_platform_data gpio0_plat_data = {
 	.gpio_base	= 0,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio1_plat_data = {
 	.gpio_base	= 8,
-	.irq_base	= -1,
 };
 
 static struct pl061_platform_data gpio2_plat_data = {
 	.gpio_base	= 16,
-	.irq_base	= -1,
 };
 
 static struct pl022_ssp_controller ssp0_plat_data = {
-- 
1.7.5.4

[PATCH 6/9] ARM: realview: convert pl061 no irq to 0 instead of -1

[Grant Likely]

On Wed, Dec 14, 2011 at 8:28 AM, Rob Herring <robherring2@gmail.com> wrote:
> From: Rob Herring <rob.herring@calxeda.com>
>
> Drivers should use 0 for no irq, so convert realview platforms pl061
> platform_data over to use 0.
>
> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> Cc: Russell King <linux@arm.linux.org.uk>

Acked-by: Grant Likely <grant.likely@secretlab.ca>


> ---
> ?arch/arm/mach-realview/realview_eb.c ? ? | ? ?3 ---
> ?arch/arm/mach-realview/realview_pb1176.c | ? ?3 ---
> ?arch/arm/mach-realview/realview_pb11mp.c | ? ?3 ---
> ?arch/arm/mach-realview/realview_pba8.c ? | ? ?3 ---
> ?arch/arm/mach-realview/realview_pbx.c ? ?| ? ?3 ---
> ?5 files changed, 0 insertions(+), 15 deletions(-)
>
> diff --git a/arch/arm/mach-realview/realview_eb.c b/arch/arm/mach-realview/realview_eb.c
> index 026c66a..57f5bac 100644
> --- a/arch/arm/mach-realview/realview_eb.c
> +++ b/arch/arm/mach-realview/realview_eb.c
> @@ -117,17 +117,14 @@ static void __init realview_eb_map_io(void)
>
> ?static struct pl061_platform_data gpio0_plat_data = {
> ? ? ? ?.gpio_base ? ? ?= 0,
> - ? ? ? .irq_base ? ? ? = -1,
> ?};
>
> ?static struct pl061_platform_data gpio1_plat_data = {
> ? ? ? ?.gpio_base ? ? ?= 8,
> - ? ? ? .irq_base ? ? ? = -1,
> ?};
>
> ?static struct pl061_platform_data gpio2_plat_data = {
> ? ? ? ?.gpio_base ? ? ?= 16,
> - ? ? ? .irq_base ? ? ? = -1,
> ?};
>
> ?static struct pl022_ssp_controller ssp0_plat_data = {
> diff --git a/arch/arm/mach-realview/realview_pb1176.c b/arch/arm/mach-realview/realview_pb1176.c
> index c057540..2267696 100644
> --- a/arch/arm/mach-realview/realview_pb1176.c
> +++ b/arch/arm/mach-realview/realview_pb1176.c
> @@ -113,17 +113,14 @@ static void __init realview_pb1176_map_io(void)
>
> ?static struct pl061_platform_data gpio0_plat_data = {
> ? ? ? ?.gpio_base ? ? ?= 0,
> - ? ? ? .irq_base ? ? ? = -1,
> ?};
>
> ?static struct pl061_platform_data gpio1_plat_data = {
> ? ? ? ?.gpio_base ? ? ?= 8,
> - ? ? ? .irq_base ? ? ? = -1,
> ?};
>
> ?static struct pl061_platform_data gpio2_plat_data = {
> ? ? ? ?.gpio_base ? ? ?= 16,
> - ? ? ? .irq_base ? ? ? = -1,
> ?};
>
> ?static struct pl022_ssp_controller ssp0_plat_data = {
> diff --git a/arch/arm/mach-realview/realview_pb11mp.c b/arch/arm/mach-realview/realview_pb11mp.c
> index 671ad6d..8622dbb 100644
> --- a/arch/arm/mach-realview/realview_pb11mp.c
> +++ b/arch/arm/mach-realview/realview_pb11mp.c
> @@ -112,17 +112,14 @@ static void __init realview_pb11mp_map_io(void)
>
> ?static struct pl061_platform_data gpio0_plat_data = {
> ? ? ? ?.gpio_base ? ? ?= 0,
> - ? ? ? .irq_base ? ? ? = -1,
> ?};
>
> ?static struct pl061_platform_data gpio1_plat_data = {
> ? ? ? ?.gpio_base ? ? ?= 8,
> - ? ? ? .irq_base ? ? ? = -1,
> ?};
>
> ?static struct pl061_platform_data gpio2_plat_data = {
> ? ? ? ?.gpio_base ? ? ?= 16,
> - ? ? ? .irq_base ? ? ? = -1,
> ?};
>
> ?static struct pl022_ssp_controller ssp0_plat_data = {
> diff --git a/arch/arm/mach-realview/realview_pba8.c b/arch/arm/mach-realview/realview_pba8.c
> index cbf22df..6f9511d 100644
> --- a/arch/arm/mach-realview/realview_pba8.c
> +++ b/arch/arm/mach-realview/realview_pba8.c
> @@ -102,17 +102,14 @@ static void __init realview_pba8_map_io(void)
>
> ?static struct pl061_platform_data gpio0_plat_data = {
> ? ? ? ?.gpio_base ? ? ?= 0,
> - ? ? ? .irq_base ? ? ? = -1,
> ?};
>
> ?static struct pl061_platform_data gpio1_plat_data = {
> ? ? ? ?.gpio_base ? ? ?= 8,
> - ? ? ? .irq_base ? ? ? = -1,
> ?};
>
> ?static struct pl061_platform_data gpio2_plat_data = {
> ? ? ? ?.gpio_base ? ? ?= 16,
> - ? ? ? .irq_base ? ? ? = -1,
> ?};
>
> ?static struct pl022_ssp_controller ssp0_plat_data = {
> diff --git a/arch/arm/mach-realview/realview_pbx.c b/arch/arm/mach-realview/realview_pbx.c
> index 63c4114..be3a01f 100644
> --- a/arch/arm/mach-realview/realview_pbx.c
> +++ b/arch/arm/mach-realview/realview_pbx.c
> @@ -124,17 +124,14 @@ static void __init realview_pbx_map_io(void)
>
> ?static struct pl061_platform_data gpio0_plat_data = {
> ? ? ? ?.gpio_base ? ? ?= 0,
> - ? ? ? .irq_base ? ? ? = -1,
> ?};
>
> ?static struct pl061_platform_data gpio1_plat_data = {
> ? ? ? ?.gpio_base ? ? ?= 8,
> - ? ? ? .irq_base ? ? ? = -1,
> ?};
>
> ?static struct pl061_platform_data gpio2_plat_data = {
> ? ? ? ?.gpio_base ? ? ?= 16,
> - ? ? ? .irq_base ? ? ? = -1,
> ?};
>
> ?static struct pl022_ssp_controller ssp0_plat_data = {
> --
> 1.7.5.4
>



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

[PATCH 7/9] gpio: pl061: convert to use generic irq chip

[Rob Herring]

From: Rob Herring <rob.herring@calxeda.com>

Convert the pl061 irq_chip code to use the generic irq chip code.

This has the side effect of using 32-bit accesses rather than 8-bit
accesses to interrupt registers. The h/w TRM and testing seem to indicate
this is fine.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.ml.walleij@gmail.com>
---
 drivers/gpio/Kconfig      |    1 +
 drivers/gpio/gpio-pl061.c |   74 ++++++++++++++++-----------------------------
 2 files changed, 27 insertions(+), 48 deletions(-)

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 8482a23..4d433e2 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -138,6 +138,7 @@ config GPIO_MXS
 config GPIO_PL061
 	bool "PrimeCell PL061 GPIO support"
 	depends on ARM_AMBA
+	select GENERIC_IRQ_CHIP
 	help
 	  Say yes here to support the PrimeCell PL061 GPIO device
 
diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
index fe19dec..4a1874f 100644
--- a/drivers/gpio/gpio-pl061.c
+++ b/drivers/gpio/gpio-pl061.c
@@ -50,7 +50,6 @@ struct pl061_gpio {
 	 * the IRQ code simpler.
 	 */
 	spinlock_t		lock;		/* GPIO registers */
-	spinlock_t		irq_lock;	/* IRQ registers */
 
 	void __iomem		*base;
 	int			irq_base;
@@ -125,40 +124,10 @@ static int pl061_to_irq(struct gpio_chip *gc, unsigned offset)
 	return chip->irq_base + offset;
 }
 
-/*
- * PL061 GPIO IRQ
- */
-static void pl061_irq_disable(struct irq_data *d)
-{
-	struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
-	int offset = d->irq - chip->irq_base;
-	unsigned long flags;
-	u8 gpioie;
-
-	spin_lock_irqsave(&chip->irq_lock, flags);
-	gpioie = readb(chip->base + GPIOIE);
-	gpioie &= ~(1 << offset);
-	writeb(gpioie, chip->base + GPIOIE);
-	spin_unlock_irqrestore(&chip->irq_lock, flags);
-}
-
-static void pl061_irq_enable(struct irq_data *d)
-{
-	struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
-	int offset = d->irq - chip->irq_base;
-	unsigned long flags;
-	u8 gpioie;
-
-	spin_lock_irqsave(&chip->irq_lock, flags);
-	gpioie = readb(chip->base + GPIOIE);
-	gpioie |= 1 << offset;
-	writeb(gpioie, chip->base + GPIOIE);
-	spin_unlock_irqrestore(&chip->irq_lock, flags);
-}
-
 static int pl061_irq_type(struct irq_data *d, unsigned trigger)
 {
-	struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
+	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+	struct pl061_gpio *chip = gc->private;
 	int offset = d->irq - chip->irq_base;
 	unsigned long flags;
 	u8 gpiois, gpioibe, gpioiev;
@@ -166,7 +135,7 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
 	if (offset < 0 || offset >= PL061_GPIO_NR)
 		return -EINVAL;
 
-	spin_lock_irqsave(&chip->irq_lock, flags);
+	raw_spin_lock_irqsave(&gc->lock, flags);
 
 	gpioiev = readb(chip->base + GPIOIEV);
 
@@ -195,18 +164,11 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
 
 	writeb(gpioiev, chip->base + GPIOIEV);
 
-	spin_unlock_irqrestore(&chip->irq_lock, flags);
+	raw_spin_unlock_irqrestore(&gc->lock, flags);
 
 	return 0;
 }
 
-static struct irq_chip pl061_irqchip = {
-	.name		= "GPIO",
-	.irq_enable	= pl061_irq_enable,
-	.irq_disable	= pl061_irq_disable,
-	.irq_set_type	= pl061_irq_type,
-};
-
 static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
 {
 	struct list_head *chip_list = irq_get_handler_data(irq);
@@ -232,6 +194,26 @@ static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
 	chained_irq_exit(irqchip, desc);
 }
 
+static void __init pl061_init_gc(struct pl061_gpio *chip, int irq_base)
+{
+	struct irq_chip_generic *gc;
+	struct irq_chip_type *ct;
+
+	gc = irq_alloc_generic_chip("gpio-pl061", 1, irq_base,
+				    chip->base, handle_simple_irq);
+	gc->private = chip;
+
+	ct = gc->chip_types;
+	ct->chip.irq_mask = irq_gc_mask_clr_bit;
+	ct->chip.irq_unmask = irq_gc_mask_set_bit;
+	ct->chip.irq_set_type = pl061_irq_type;
+	ct->chip.irq_set_wake = irq_gc_set_wake;
+	ct->regs.mask = GPIOIE;
+
+	irq_setup_generic_chip(gc, IRQ_MSK(PL061_GPIO_NR),
+			       IRQ_GC_INIT_NESTED_LOCK, IRQ_NOREQUEST, 0);
+}
+
 static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
 {
 	struct pl061_platform_data *pdata;
@@ -269,7 +251,6 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
 	}
 
 	spin_lock_init(&chip->lock);
-	spin_lock_init(&chip->irq_lock);
 	INIT_LIST_HEAD(&chip->list);
 
 	chip->gc.direction_input = pl061_direction_input;
@@ -293,6 +274,8 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
 	if (chip->irq_base <= 0)
 		return 0;
 
+	pl061_init_gc(chip, chip->irq_base);
+
 	writeb(0, chip->base + GPIOIE); /* disable irqs */
 	irq = dev->irq[0];
 	if (irq < 0) {
@@ -321,11 +304,6 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
 			else
 				pl061_direction_input(&chip->gc, i);
 		}
-
-		irq_set_chip_and_handler(i + chip->irq_base, &pl061_irqchip,
-					 handle_simple_irq);
-		set_irq_flags(i+chip->irq_base, IRQF_VALID);
-		irq_set_chip_data(i + chip->irq_base, chip);
 	}
 
 	return 0;
-- 
1.7.5.4

[PATCH 7/9] gpio: pl061: convert to use generic irq chip

[Grant Likely]

On Wed, Dec 14, 2011 at 8:28 AM, Rob Herring <robherring2@gmail.com> wrote:
> From: Rob Herring <rob.herring@calxeda.com>
>
> Convert the pl061 irq_chip code to use the generic irq chip code.
>
> This has the side effect of using 32-bit accesses rather than 8-bit
> accesses to interrupt registers. The h/w TRM and testing seem to indicate
> this is fine.
>
> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> Cc: Grant Likely <grant.likely@secretlab.ca>

Acked-by: Grant Likely <grant.likely@secretlab.ca>

> Cc: Linus Walleij <linus.ml.walleij@gmail.com>
> ---
> ?drivers/gpio/Kconfig ? ? ?| ? ?1 +
> ?drivers/gpio/gpio-pl061.c | ? 74 ++++++++++++++++-----------------------------
> ?2 files changed, 27 insertions(+), 48 deletions(-)
>
> diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
> index 8482a23..4d433e2 100644
> --- a/drivers/gpio/Kconfig
> +++ b/drivers/gpio/Kconfig
> @@ -138,6 +138,7 @@ config GPIO_MXS
> ?config GPIO_PL061
> ? ? ? ?bool "PrimeCell PL061 GPIO support"
> ? ? ? ?depends on ARM_AMBA
> + ? ? ? select GENERIC_IRQ_CHIP
> ? ? ? ?help
> ? ? ? ? ?Say yes here to support the PrimeCell PL061 GPIO device
>
> diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
> index fe19dec..4a1874f 100644
> --- a/drivers/gpio/gpio-pl061.c
> +++ b/drivers/gpio/gpio-pl061.c
> @@ -50,7 +50,6 @@ struct pl061_gpio {
> ? ? ? ? * the IRQ code simpler.
> ? ? ? ? */
> ? ? ? ?spinlock_t ? ? ? ? ? ? ?lock; ? ? ? ? ? /* GPIO registers */
> - ? ? ? spinlock_t ? ? ? ? ? ? ?irq_lock; ? ? ? /* IRQ registers */
>
> ? ? ? ?void __iomem ? ? ? ? ? ?*base;
> ? ? ? ?int ? ? ? ? ? ? ? ? ? ? irq_base;
> @@ -125,40 +124,10 @@ static int pl061_to_irq(struct gpio_chip *gc, unsigned offset)
> ? ? ? ?return chip->irq_base + offset;
> ?}
>
> -/*
> - * PL061 GPIO IRQ
> - */
> -static void pl061_irq_disable(struct irq_data *d)
> -{
> - ? ? ? struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
> - ? ? ? int offset = d->irq - chip->irq_base;
> - ? ? ? unsigned long flags;
> - ? ? ? u8 gpioie;
> -
> - ? ? ? spin_lock_irqsave(&chip->irq_lock, flags);
> - ? ? ? gpioie = readb(chip->base + GPIOIE);
> - ? ? ? gpioie &= ~(1 << offset);
> - ? ? ? writeb(gpioie, chip->base + GPIOIE);
> - ? ? ? spin_unlock_irqrestore(&chip->irq_lock, flags);
> -}
> -
> -static void pl061_irq_enable(struct irq_data *d)
> -{
> - ? ? ? struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
> - ? ? ? int offset = d->irq - chip->irq_base;
> - ? ? ? unsigned long flags;
> - ? ? ? u8 gpioie;
> -
> - ? ? ? spin_lock_irqsave(&chip->irq_lock, flags);
> - ? ? ? gpioie = readb(chip->base + GPIOIE);
> - ? ? ? gpioie |= 1 << offset;
> - ? ? ? writeb(gpioie, chip->base + GPIOIE);
> - ? ? ? spin_unlock_irqrestore(&chip->irq_lock, flags);
> -}
> -
> ?static int pl061_irq_type(struct irq_data *d, unsigned trigger)
> ?{
> - ? ? ? struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
> + ? ? ? struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
> + ? ? ? struct pl061_gpio *chip = gc->private;
> ? ? ? ?int offset = d->irq - chip->irq_base;
> ? ? ? ?unsigned long flags;
> ? ? ? ?u8 gpiois, gpioibe, gpioiev;
> @@ -166,7 +135,7 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
> ? ? ? ?if (offset < 0 || offset >= PL061_GPIO_NR)
> ? ? ? ? ? ? ? ?return -EINVAL;
>
> - ? ? ? spin_lock_irqsave(&chip->irq_lock, flags);
> + ? ? ? raw_spin_lock_irqsave(&gc->lock, flags);
>
> ? ? ? ?gpioiev = readb(chip->base + GPIOIEV);
>
> @@ -195,18 +164,11 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
>
> ? ? ? ?writeb(gpioiev, chip->base + GPIOIEV);
>
> - ? ? ? spin_unlock_irqrestore(&chip->irq_lock, flags);
> + ? ? ? raw_spin_unlock_irqrestore(&gc->lock, flags);
>
> ? ? ? ?return 0;
> ?}
>
> -static struct irq_chip pl061_irqchip = {
> - ? ? ? .name ? ? ? ? ? = "GPIO",
> - ? ? ? .irq_enable ? ? = pl061_irq_enable,
> - ? ? ? .irq_disable ? ?= pl061_irq_disable,
> - ? ? ? .irq_set_type ? = pl061_irq_type,
> -};
> -
> ?static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
> ?{
> ? ? ? ?struct list_head *chip_list = irq_get_handler_data(irq);
> @@ -232,6 +194,26 @@ static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
> ? ? ? ?chained_irq_exit(irqchip, desc);
> ?}
>
> +static void __init pl061_init_gc(struct pl061_gpio *chip, int irq_base)
> +{
> + ? ? ? struct irq_chip_generic *gc;
> + ? ? ? struct irq_chip_type *ct;
> +
> + ? ? ? gc = irq_alloc_generic_chip("gpio-pl061", 1, irq_base,
> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? chip->base, handle_simple_irq);
> + ? ? ? gc->private = chip;
> +
> + ? ? ? ct = gc->chip_types;
> + ? ? ? ct->chip.irq_mask = irq_gc_mask_clr_bit;
> + ? ? ? ct->chip.irq_unmask = irq_gc_mask_set_bit;
> + ? ? ? ct->chip.irq_set_type = pl061_irq_type;
> + ? ? ? ct->chip.irq_set_wake = irq_gc_set_wake;
> + ? ? ? ct->regs.mask = GPIOIE;
> +
> + ? ? ? irq_setup_generic_chip(gc, IRQ_MSK(PL061_GPIO_NR),
> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?IRQ_GC_INIT_NESTED_LOCK, IRQ_NOREQUEST, 0);
> +}
> +
> ?static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
> ?{
> ? ? ? ?struct pl061_platform_data *pdata;
> @@ -269,7 +251,6 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
> ? ? ? ?}
>
> ? ? ? ?spin_lock_init(&chip->lock);
> - ? ? ? spin_lock_init(&chip->irq_lock);
> ? ? ? ?INIT_LIST_HEAD(&chip->list);
>
> ? ? ? ?chip->gc.direction_input = pl061_direction_input;
> @@ -293,6 +274,8 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
> ? ? ? ?if (chip->irq_base <= 0)
> ? ? ? ? ? ? ? ?return 0;
>
> + ? ? ? pl061_init_gc(chip, chip->irq_base);
> +
> ? ? ? ?writeb(0, chip->base + GPIOIE); /* disable irqs */
> ? ? ? ?irq = dev->irq[0];
> ? ? ? ?if (irq < 0) {
> @@ -321,11 +304,6 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
> ? ? ? ? ? ? ? ? ? ? ? ?else
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?pl061_direction_input(&chip->gc, i);
> ? ? ? ? ? ? ? ?}
> -
> - ? ? ? ? ? ? ? irq_set_chip_and_handler(i + chip->irq_base, &pl061_irqchip,
> - ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?handle_simple_irq);
> - ? ? ? ? ? ? ? set_irq_flags(i+chip->irq_base, IRQF_VALID);
> - ? ? ? ? ? ? ? irq_set_chip_data(i + chip->irq_base, chip);
> ? ? ? ?}
>
> ? ? ? ?return 0;
> --
> 1.7.5.4
>



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

[PATCH v2] gpio: pl061: convert to use generic irq chip

[Rob Herring]

From: Rob Herring <rob.herring@calxeda.com>

Convert the pl061 irq_chip code to use the generic irq chip code.

This has the side effect of using 32-bit accesses rather than 8-bit
accesses to interrupt registers. The h/w TRM and testing seem to indicate
this is fine.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.ml.walleij@gmail.com>
---
v2:
- put struct irq_chip_generic pointer into struct pl061_gpio instead of domain
ptr.

 drivers/gpio/Kconfig      |    1 +
 drivers/gpio/gpio-pl061.c |   74 ++++++++++++++++-----------------------------
 2 files changed, 27 insertions(+), 48 deletions(-)

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 8482a23..4d433e2 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -138,6 +138,7 @@ config GPIO_MXS
 config GPIO_PL061
 	bool "PrimeCell PL061 GPIO support"
 	depends on ARM_AMBA
+	select GENERIC_IRQ_CHIP
 	help
 	  Say yes here to support the PrimeCell PL061 GPIO device
 
diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
index fe19dec..96ff6b2 100644
--- a/drivers/gpio/gpio-pl061.c
+++ b/drivers/gpio/gpio-pl061.c
@@ -50,10 +50,10 @@ struct pl061_gpio {
 	 * the IRQ code simpler.
 	 */
 	spinlock_t		lock;		/* GPIO registers */
-	spinlock_t		irq_lock;	/* IRQ registers */
 
 	void __iomem		*base;
 	int			irq_base;
+	struct irq_chip_generic	*irq_gc;
 	struct gpio_chip	gc;
 };
 
@@ -125,40 +125,10 @@ static int pl061_to_irq(struct gpio_chip *gc, unsigned offset)
 	return chip->irq_base + offset;
 }
 
-/*
- * PL061 GPIO IRQ
- */
-static void pl061_irq_disable(struct irq_data *d)
-{
-	struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
-	int offset = d->irq - chip->irq_base;
-	unsigned long flags;
-	u8 gpioie;
-
-	spin_lock_irqsave(&chip->irq_lock, flags);
-	gpioie = readb(chip->base + GPIOIE);
-	gpioie &= ~(1 << offset);
-	writeb(gpioie, chip->base + GPIOIE);
-	spin_unlock_irqrestore(&chip->irq_lock, flags);
-}
-
-static void pl061_irq_enable(struct irq_data *d)
-{
-	struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
-	int offset = d->irq - chip->irq_base;
-	unsigned long flags;
-	u8 gpioie;
-
-	spin_lock_irqsave(&chip->irq_lock, flags);
-	gpioie = readb(chip->base + GPIOIE);
-	gpioie |= 1 << offset;
-	writeb(gpioie, chip->base + GPIOIE);
-	spin_unlock_irqrestore(&chip->irq_lock, flags);
-}
-
 static int pl061_irq_type(struct irq_data *d, unsigned trigger)
 {
-	struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
+	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+	struct pl061_gpio *chip = gc->private;
 	int offset = d->irq - chip->irq_base;
 	unsigned long flags;
 	u8 gpiois, gpioibe, gpioiev;
@@ -166,7 +136,7 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
 	if (offset < 0 || offset >= PL061_GPIO_NR)
 		return -EINVAL;
 
-	spin_lock_irqsave(&chip->irq_lock, flags);
+	raw_spin_lock_irqsave(&gc->lock, flags);
 
 	gpioiev = readb(chip->base + GPIOIEV);
 
@@ -195,18 +165,11 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
 
 	writeb(gpioiev, chip->base + GPIOIEV);
 
-	spin_unlock_irqrestore(&chip->irq_lock, flags);
+	raw_spin_unlock_irqrestore(&gc->lock, flags);
 
 	return 0;
 }
 
-static struct irq_chip pl061_irqchip = {
-	.name		= "GPIO",
-	.irq_enable	= pl061_irq_enable,
-	.irq_disable	= pl061_irq_disable,
-	.irq_set_type	= pl061_irq_type,
-};
-
 static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
 {
 	struct list_head *chip_list = irq_get_handler_data(irq);
@@ -232,6 +195,25 @@ static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
 	chained_irq_exit(irqchip, desc);
 }
 
+static void __init pl061_init_gc(struct pl061_gpio *chip, int irq_base)
+{
+	struct irq_chip_type *ct;
+
+	chip->irq_gc = irq_alloc_generic_chip("gpio-pl061", 1, irq_base,
+					      chip->base, handle_simple_irq);
+	chip->irq_gc->private = chip;
+
+	ct = chip->irq_gc->chip_types;
+	ct->chip.irq_mask = irq_gc_mask_clr_bit;
+	ct->chip.irq_unmask = irq_gc_mask_set_bit;
+	ct->chip.irq_set_type = pl061_irq_type;
+	ct->chip.irq_set_wake = irq_gc_set_wake;
+	ct->regs.mask = GPIOIE;
+
+	irq_setup_generic_chip(chip->irq_gc, IRQ_MSK(PL061_GPIO_NR),
+			       IRQ_GC_INIT_NESTED_LOCK, IRQ_NOREQUEST, 0);
+}
+
 static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
 {
 	struct pl061_platform_data *pdata;
@@ -269,7 +251,6 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
 	}
 
 	spin_lock_init(&chip->lock);
-	spin_lock_init(&chip->irq_lock);
 	INIT_LIST_HEAD(&chip->list);
 
 	chip->gc.direction_input = pl061_direction_input;
@@ -293,6 +274,8 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
 	if (chip->irq_base <= 0)
 		return 0;
 
+	pl061_init_gc(chip, chip->irq_base);
+
 	writeb(0, chip->base + GPIOIE); /* disable irqs */
 	irq = dev->irq[0];
 	if (irq < 0) {
@@ -321,11 +304,6 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
 			else
 				pl061_direction_input(&chip->gc, i);
 		}
-
-		irq_set_chip_and_handler(i + chip->irq_base, &pl061_irqchip,
-					 handle_simple_irq);
-		set_irq_flags(i+chip->irq_base, IRQF_VALID);
-		irq_set_chip_data(i + chip->irq_base, chip);
 	}
 
 	return 0;
-- 
1.7.5.4

[PATCH v2] gpio: pl061: convert to use generic irq chip

[Linus Walleij]

On Mon, Dec 19, 2011 at 9:52 PM, Rob Herring <robherring2@gmail.com> wrote:

> From: Rob Herring <rob.herring@calxeda.com>
>
> Convert the pl061 irq_chip code to use the generic irq chip code.
>
> This has the side effect of using 32-bit accesses rather than 8-bit
> accesses to interrupt registers. The h/w TRM and testing seem to indicate
> this is fine.
>
> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> Acked-by: Grant Likely <grant.likely@secretlab.ca>
> Cc: Linus Walleij <linus.ml.walleij@gmail.com>
> ---
> v2:
> - put struct irq_chip_generic pointer into struct pl061_gpio instead of domain
> ptr.

Looks good to me.
Acked-by: Linus Walleij <linus.walleij@linaro.org>

Thanks,
Linus Walleij

[PATCH v2] gpio: pl061: convert to use generic irq chip

[Grant Likely]

On Mon, Dec 19, 2011 at 02:52:07PM -0600, Rob Herring wrote:
> From: Rob Herring <rob.herring@calxeda.com>
> 
> Convert the pl061 irq_chip code to use the generic irq chip code.
> 
> This has the side effect of using 32-bit accesses rather than 8-bit
> accesses to interrupt registers. The h/w TRM and testing seem to indicate
> this is fine.
> 
> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> Acked-by: Grant Likely <grant.likely@secretlab.ca>
> Cc: Linus Walleij <linus.ml.walleij@gmail.com>

What does this apply against?  It doesn't apply cleanly.

g.

> ---
> v2:
> - put struct irq_chip_generic pointer into struct pl061_gpio instead of domain
> ptr.
> 
>  drivers/gpio/Kconfig      |    1 +
>  drivers/gpio/gpio-pl061.c |   74 ++++++++++++++++-----------------------------
>  2 files changed, 27 insertions(+), 48 deletions(-)
> 
> diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
> index 8482a23..4d433e2 100644
> --- a/drivers/gpio/Kconfig
> +++ b/drivers/gpio/Kconfig
> @@ -138,6 +138,7 @@ config GPIO_MXS
>  config GPIO_PL061
>  	bool "PrimeCell PL061 GPIO support"
>  	depends on ARM_AMBA
> +	select GENERIC_IRQ_CHIP
>  	help
>  	  Say yes here to support the PrimeCell PL061 GPIO device
>  
> diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
> index fe19dec..96ff6b2 100644
> --- a/drivers/gpio/gpio-pl061.c
> +++ b/drivers/gpio/gpio-pl061.c
> @@ -50,10 +50,10 @@ struct pl061_gpio {
>  	 * the IRQ code simpler.
>  	 */
>  	spinlock_t		lock;		/* GPIO registers */
> -	spinlock_t		irq_lock;	/* IRQ registers */
>  
>  	void __iomem		*base;
>  	int			irq_base;
> +	struct irq_chip_generic	*irq_gc;
>  	struct gpio_chip	gc;
>  };
>  
> @@ -125,40 +125,10 @@ static int pl061_to_irq(struct gpio_chip *gc, unsigned offset)
>  	return chip->irq_base + offset;
>  }
>  
> -/*
> - * PL061 GPIO IRQ
> - */
> -static void pl061_irq_disable(struct irq_data *d)
> -{
> -	struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
> -	int offset = d->irq - chip->irq_base;
> -	unsigned long flags;
> -	u8 gpioie;
> -
> -	spin_lock_irqsave(&chip->irq_lock, flags);
> -	gpioie = readb(chip->base + GPIOIE);
> -	gpioie &= ~(1 << offset);
> -	writeb(gpioie, chip->base + GPIOIE);
> -	spin_unlock_irqrestore(&chip->irq_lock, flags);
> -}
> -
> -static void pl061_irq_enable(struct irq_data *d)
> -{
> -	struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
> -	int offset = d->irq - chip->irq_base;
> -	unsigned long flags;
> -	u8 gpioie;
> -
> -	spin_lock_irqsave(&chip->irq_lock, flags);
> -	gpioie = readb(chip->base + GPIOIE);
> -	gpioie |= 1 << offset;
> -	writeb(gpioie, chip->base + GPIOIE);
> -	spin_unlock_irqrestore(&chip->irq_lock, flags);
> -}
> -
>  static int pl061_irq_type(struct irq_data *d, unsigned trigger)
>  {
> -	struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
> +	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
> +	struct pl061_gpio *chip = gc->private;
>  	int offset = d->irq - chip->irq_base;
>  	unsigned long flags;
>  	u8 gpiois, gpioibe, gpioiev;
> @@ -166,7 +136,7 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
>  	if (offset < 0 || offset >= PL061_GPIO_NR)
>  		return -EINVAL;
>  
> -	spin_lock_irqsave(&chip->irq_lock, flags);
> +	raw_spin_lock_irqsave(&gc->lock, flags);
>  
>  	gpioiev = readb(chip->base + GPIOIEV);
>  
> @@ -195,18 +165,11 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
>  
>  	writeb(gpioiev, chip->base + GPIOIEV);
>  
> -	spin_unlock_irqrestore(&chip->irq_lock, flags);
> +	raw_spin_unlock_irqrestore(&gc->lock, flags);
>  
>  	return 0;
>  }
>  
> -static struct irq_chip pl061_irqchip = {
> -	.name		= "GPIO",
> -	.irq_enable	= pl061_irq_enable,
> -	.irq_disable	= pl061_irq_disable,
> -	.irq_set_type	= pl061_irq_type,
> -};
> -
>  static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
>  {
>  	struct list_head *chip_list = irq_get_handler_data(irq);
> @@ -232,6 +195,25 @@ static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
>  	chained_irq_exit(irqchip, desc);
>  }
>  
> +static void __init pl061_init_gc(struct pl061_gpio *chip, int irq_base)
> +{
> +	struct irq_chip_type *ct;
> +
> +	chip->irq_gc = irq_alloc_generic_chip("gpio-pl061", 1, irq_base,
> +					      chip->base, handle_simple_irq);
> +	chip->irq_gc->private = chip;
> +
> +	ct = chip->irq_gc->chip_types;
> +	ct->chip.irq_mask = irq_gc_mask_clr_bit;
> +	ct->chip.irq_unmask = irq_gc_mask_set_bit;
> +	ct->chip.irq_set_type = pl061_irq_type;
> +	ct->chip.irq_set_wake = irq_gc_set_wake;
> +	ct->regs.mask = GPIOIE;
> +
> +	irq_setup_generic_chip(chip->irq_gc, IRQ_MSK(PL061_GPIO_NR),
> +			       IRQ_GC_INIT_NESTED_LOCK, IRQ_NOREQUEST, 0);
> +}
> +
>  static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
>  {
>  	struct pl061_platform_data *pdata;
> @@ -269,7 +251,6 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
>  	}
>  
>  	spin_lock_init(&chip->lock);
> -	spin_lock_init(&chip->irq_lock);
>  	INIT_LIST_HEAD(&chip->list);
>  
>  	chip->gc.direction_input = pl061_direction_input;
> @@ -293,6 +274,8 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
>  	if (chip->irq_base <= 0)
>  		return 0;
>  
> +	pl061_init_gc(chip, chip->irq_base);
> +
>  	writeb(0, chip->base + GPIOIE); /* disable irqs */
>  	irq = dev->irq[0];
>  	if (irq < 0) {
> @@ -321,11 +304,6 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
>  			else
>  				pl061_direction_input(&chip->gc, i);
>  		}
> -
> -		irq_set_chip_and_handler(i + chip->irq_base, &pl061_irqchip,
> -					 handle_simple_irq);
> -		set_irq_flags(i+chip->irq_base, IRQF_VALID);
> -		irq_set_chip_data(i + chip->irq_base, chip);
>  	}
>  
>  	return 0;
> -- 
> 1.7.5.4
> 

[PATCH v2] gpio: pl061: convert to use generic irq chip

[Rob Herring]

Grant,

On 01/02/2012 02:54 AM, Grant Likely wrote:
> On Mon, Dec 19, 2011 at 02:52:07PM -0600, Rob Herring wrote:
>> From: Rob Herring <rob.herring@calxeda.com>
>>
>> Convert the pl061 irq_chip code to use the generic irq chip code.
>>
>> This has the side effect of using 32-bit accesses rather than 8-bit
>> accesses to interrupt registers. The h/w TRM and testing seem to indicate
>> this is fine.
>>
>> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
>> Acked-by: Grant Likely <grant.likely@secretlab.ca>
>> Cc: Linus Walleij <linus.ml.walleij@gmail.com>
> 
> What does this apply against?  It doesn't apply cleanly.
> 

You need the whole series which is available here:

git://sources.calxeda.com/kernel/linux.git pl061-domain-v2

Rob

> g.
> 
>> ---
>> v2:
>> - put struct irq_chip_generic pointer into struct pl061_gpio instead of domain
>> ptr.
>>
>>  drivers/gpio/Kconfig      |    1 +
>>  drivers/gpio/gpio-pl061.c |   74 ++++++++++++++++-----------------------------
>>  2 files changed, 27 insertions(+), 48 deletions(-)
>>
>> diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
>> index 8482a23..4d433e2 100644
>> --- a/drivers/gpio/Kconfig
>> +++ b/drivers/gpio/Kconfig
>> @@ -138,6 +138,7 @@ config GPIO_MXS
>>  config GPIO_PL061
>>  	bool "PrimeCell PL061 GPIO support"
>>  	depends on ARM_AMBA
>> +	select GENERIC_IRQ_CHIP
>>  	help
>>  	  Say yes here to support the PrimeCell PL061 GPIO device
>>  
>> diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
>> index fe19dec..96ff6b2 100644
>> --- a/drivers/gpio/gpio-pl061.c
>> +++ b/drivers/gpio/gpio-pl061.c
>> @@ -50,10 +50,10 @@ struct pl061_gpio {
>>  	 * the IRQ code simpler.
>>  	 */
>>  	spinlock_t		lock;		/* GPIO registers */
>> -	spinlock_t		irq_lock;	/* IRQ registers */
>>  
>>  	void __iomem		*base;
>>  	int			irq_base;
>> +	struct irq_chip_generic	*irq_gc;
>>  	struct gpio_chip	gc;
>>  };
>>  
>> @@ -125,40 +125,10 @@ static int pl061_to_irq(struct gpio_chip *gc, unsigned offset)
>>  	return chip->irq_base + offset;
>>  }
>>  
>> -/*
>> - * PL061 GPIO IRQ
>> - */
>> -static void pl061_irq_disable(struct irq_data *d)
>> -{
>> -	struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
>> -	int offset = d->irq - chip->irq_base;
>> -	unsigned long flags;
>> -	u8 gpioie;
>> -
>> -	spin_lock_irqsave(&chip->irq_lock, flags);
>> -	gpioie = readb(chip->base + GPIOIE);
>> -	gpioie &= ~(1 << offset);
>> -	writeb(gpioie, chip->base + GPIOIE);
>> -	spin_unlock_irqrestore(&chip->irq_lock, flags);
>> -}
>> -
>> -static void pl061_irq_enable(struct irq_data *d)
>> -{
>> -	struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
>> -	int offset = d->irq - chip->irq_base;
>> -	unsigned long flags;
>> -	u8 gpioie;
>> -
>> -	spin_lock_irqsave(&chip->irq_lock, flags);
>> -	gpioie = readb(chip->base + GPIOIE);
>> -	gpioie |= 1 << offset;
>> -	writeb(gpioie, chip->base + GPIOIE);
>> -	spin_unlock_irqrestore(&chip->irq_lock, flags);
>> -}
>> -
>>  static int pl061_irq_type(struct irq_data *d, unsigned trigger)
>>  {
>> -	struct pl061_gpio *chip = irq_data_get_irq_chip_data(d);
>> +	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
>> +	struct pl061_gpio *chip = gc->private;
>>  	int offset = d->irq - chip->irq_base;
>>  	unsigned long flags;
>>  	u8 gpiois, gpioibe, gpioiev;
>> @@ -166,7 +136,7 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
>>  	if (offset < 0 || offset >= PL061_GPIO_NR)
>>  		return -EINVAL;
>>  
>> -	spin_lock_irqsave(&chip->irq_lock, flags);
>> +	raw_spin_lock_irqsave(&gc->lock, flags);
>>  
>>  	gpioiev = readb(chip->base + GPIOIEV);
>>  
>> @@ -195,18 +165,11 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger)
>>  
>>  	writeb(gpioiev, chip->base + GPIOIEV);
>>  
>> -	spin_unlock_irqrestore(&chip->irq_lock, flags);
>> +	raw_spin_unlock_irqrestore(&gc->lock, flags);
>>  
>>  	return 0;
>>  }
>>  
>> -static struct irq_chip pl061_irqchip = {
>> -	.name		= "GPIO",
>> -	.irq_enable	= pl061_irq_enable,
>> -	.irq_disable	= pl061_irq_disable,
>> -	.irq_set_type	= pl061_irq_type,
>> -};
>> -
>>  static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
>>  {
>>  	struct list_head *chip_list = irq_get_handler_data(irq);
>> @@ -232,6 +195,25 @@ static void pl061_irq_handler(unsigned irq, struct irq_desc *desc)
>>  	chained_irq_exit(irqchip, desc);
>>  }
>>  
>> +static void __init pl061_init_gc(struct pl061_gpio *chip, int irq_base)
>> +{
>> +	struct irq_chip_type *ct;
>> +
>> +	chip->irq_gc = irq_alloc_generic_chip("gpio-pl061", 1, irq_base,
>> +					      chip->base, handle_simple_irq);
>> +	chip->irq_gc->private = chip;
>> +
>> +	ct = chip->irq_gc->chip_types;
>> +	ct->chip.irq_mask = irq_gc_mask_clr_bit;
>> +	ct->chip.irq_unmask = irq_gc_mask_set_bit;
>> +	ct->chip.irq_set_type = pl061_irq_type;
>> +	ct->chip.irq_set_wake = irq_gc_set_wake;
>> +	ct->regs.mask = GPIOIE;
>> +
>> +	irq_setup_generic_chip(chip->irq_gc, IRQ_MSK(PL061_GPIO_NR),
>> +			       IRQ_GC_INIT_NESTED_LOCK, IRQ_NOREQUEST, 0);
>> +}
>> +
>>  static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
>>  {
>>  	struct pl061_platform_data *pdata;
>> @@ -269,7 +251,6 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
>>  	}
>>  
>>  	spin_lock_init(&chip->lock);
>> -	spin_lock_init(&chip->irq_lock);
>>  	INIT_LIST_HEAD(&chip->list);
>>  
>>  	chip->gc.direction_input = pl061_direction_input;
>> @@ -293,6 +274,8 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
>>  	if (chip->irq_base <= 0)
>>  		return 0;
>>  
>> +	pl061_init_gc(chip, chip->irq_base);
>> +
>>  	writeb(0, chip->base + GPIOIE); /* disable irqs */
>>  	irq = dev->irq[0];
>>  	if (irq < 0) {
>> @@ -321,11 +304,6 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
>>  			else
>>  				pl061_direction_input(&chip->gc, i);
>>  		}
>> -
>> -		irq_set_chip_and_handler(i + chip->irq_base, &pl061_irqchip,
>> -					 handle_simple_irq);
>> -		set_irq_flags(i+chip->irq_base, IRQF_VALID);
>> -		irq_set_chip_data(i + chip->irq_base, chip);
>>  	}
>>  
>>  	return 0;
>> -- 
>> 1.7.5.4
>>

[PATCH 8/9] gpio: pl061: enable interrupts with DT style binding

[Rob Herring]

From: Rob Herring <rob.herring@calxeda.com>

Enable DT interrupt binding support for pl061 gpio lines. If the gpio
node has an interrupt-controller property, then it will be setup to
handle interrupts on gpio lines.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.ml.walleij@gmail.com>
---
 .../devicetree/bindings/gpio/pl061-gpio.txt        |   15 ++++++++++
 drivers/gpio/gpio-pl061.c                          |   29 +++++++++++--------
 2 files changed, 32 insertions(+), 12 deletions(-)

diff --git a/Documentation/devicetree/bindings/gpio/pl061-gpio.txt b/Documentation/devicetree/bindings/gpio/pl061-gpio.txt
index a2c416b..9671d4e 100644
--- a/Documentation/devicetree/bindings/gpio/pl061-gpio.txt
+++ b/Documentation/devicetree/bindings/gpio/pl061-gpio.txt
@@ -8,3 +8,18 @@ Required properties:
 - gpio-controller : Marks the device node as a GPIO controller.
 - interrupts : Interrupt mapping for GPIO IRQ.
 
+Optional properties:
+- interrupt-controller : Identifies the node as an interrupt controller. Must
+  be present if using gpios lines for interrupts.
+- #interrupt-cells : Specifies the number of cells needed to encode an
+  interrupt source.  The type shall be a <u32> and the value shall be 2.
+
+  The 1st cell contains the interrupt number 0-7 corresponding to the gpio
+  line.
+
+  The 2nd cell is the flags, encoding trigger type and level flags.
+	1 = low-to-high edge triggered
+	2 = high-to-low edge triggered
+	4 = active high level-sensitive
+	8 = active low level-sensitive
+
diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
index 4a1874f..0151798 100644
--- a/drivers/gpio/gpio-pl061.c
+++ b/drivers/gpio/gpio-pl061.c
@@ -16,6 +16,8 @@
 #include <linux/io.h>
 #include <linux/ioport.h>
 #include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/of.h>
 #include <linux/bitops.h>
 #include <linux/workqueue.h>
 #include <linux/gpio.h>
@@ -52,7 +54,7 @@ struct pl061_gpio {
 	spinlock_t		lock;		/* GPIO registers */
 
 	void __iomem		*base;
-	int			irq_base;
+	struct irq_domain	*irq_domain;
 	struct gpio_chip	gc;
 };
 
@@ -117,18 +119,16 @@ static void pl061_set_value(struct gpio_chip *gc, unsigned offset, int value)
 static int pl061_to_irq(struct gpio_chip *gc, unsigned offset)
 {
 	struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc);
-
-	if (chip->irq_base <= 0)
-		return -EINVAL;
-
-	return chip->irq_base + offset;
+	if (!chip->irq_domain)
+		return -ENXIO;
+	return irq_domain_to_irq(chip->irq_domain, offset);
 }
 
 static int pl061_irq_type(struct irq_data *d, unsigned trigger)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
 	struct pl061_gpio *chip = gc->private;
-	int offset = d->irq - chip->irq_base;
+	int offset = d->hwirq;
 	unsigned long flags;
 	u8 gpiois, gpioibe, gpioiev;
 
@@ -212,6 +212,7 @@ static void __init pl061_init_gc(struct pl061_gpio *chip, int irq_base)
 
 	irq_setup_generic_chip(gc, IRQ_MSK(PL061_GPIO_NR),
 			       IRQ_GC_INIT_NESTED_LOCK, IRQ_NOREQUEST, 0);
+	chip->irq_domain = gc->domain;
 }
 
 static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
@@ -219,7 +220,7 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
 	struct pl061_platform_data *pdata;
 	struct pl061_gpio *chip;
 	struct list_head *chip_list;
-	int ret, irq, i;
+	int ret, irq, i, irq_base;
 	static DECLARE_BITMAP(init_irq, NR_IRQS);
 
 	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
@@ -229,10 +230,13 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
 	pdata = dev->dev.platform_data;
 	if (pdata) {
 		chip->gc.base = pdata->gpio_base;
-		chip->irq_base = pdata->irq_base;
+		irq_base = pdata->irq_base;
 	} else if (dev->dev.of_node) {
 		chip->gc.base = -1;
-		chip->irq_base = 0;
+		if (of_get_property(dev->dev.of_node, "interrupt-controller", NULL))
+			irq_base = -1;
+		else
+			irq_base = 0;
 	} else {
 		ret = -ENODEV;
 		goto free_mem;
@@ -271,10 +275,11 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
 	 * irq_chip support
 	 */
 
-	if (chip->irq_base <= 0)
+	if (!irq_base)
 		return 0;
 
-	pl061_init_gc(chip, chip->irq_base);
+	pl061_init_gc(chip, irq_base);
+	chip->irq_domain->of_node = of_node_get(dev->dev.of_node);
 
 	writeb(0, chip->base + GPIOIE); /* disable irqs */
 	irq = dev->irq[0];
-- 
1.7.5.4

[PATCH 8/9] gpio: pl061: enable interrupts with DT style binding

[Grant Likely]

On Wed, Dec 14, 2011 at 8:28 AM, Rob Herring <robherring2@gmail.com> wrote:
> From: Rob Herring <rob.herring@calxeda.com>
>
> Enable DT interrupt binding support for pl061 gpio lines. If the gpio
> node has an interrupt-controller property, then it will be setup to
> handle interrupts on gpio lines.
>
> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
> Cc: Grant Likely <grant.likely@secretlab.ca>
> Cc: Linus Walleij <linus.ml.walleij@gmail.com>
> ---
> ?.../devicetree/bindings/gpio/pl061-gpio.txt ? ? ? ?| ? 15 ++++++++++
> ?drivers/gpio/gpio-pl061.c ? ? ? ? ? ? ? ? ? ? ? ? ?| ? 29 +++++++++++--------
> ?2 files changed, 32 insertions(+), 12 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/gpio/pl061-gpio.txt b/Documentation/devicetree/bindings/gpio/pl061-gpio.txt
> index a2c416b..9671d4e 100644
> --- a/Documentation/devicetree/bindings/gpio/pl061-gpio.txt
> +++ b/Documentation/devicetree/bindings/gpio/pl061-gpio.txt
> @@ -8,3 +8,18 @@ Required properties:
> ?- gpio-controller : Marks the device node as a GPIO controller.
> ?- interrupts : Interrupt mapping for GPIO IRQ.
>
> +Optional properties:
> +- interrupt-controller : Identifies the node as an interrupt controller. Must
> + ?be present if using gpios lines for interrupts.
> +- #interrupt-cells : Specifies the number of cells needed to encode an
> + ?interrupt source. ?The type shall be a <u32> and the value shall be 2.
> +
> + ?The 1st cell contains the interrupt number 0-7 corresponding to the gpio
> + ?line.
> +
> + ?The 2nd cell is the flags, encoding trigger type and level flags.
> + ? ? ? 1 = low-to-high edge triggered
> + ? ? ? 2 = high-to-low edge triggered
> + ? ? ? 4 = active high level-sensitive
> + ? ? ? 8 = active low level-sensitive
> +
> diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
> index 4a1874f..0151798 100644
> --- a/drivers/gpio/gpio-pl061.c
> +++ b/drivers/gpio/gpio-pl061.c
> @@ -16,6 +16,8 @@
> ?#include <linux/io.h>
> ?#include <linux/ioport.h>
> ?#include <linux/irq.h>
> +#include <linux/irqdomain.h>
> +#include <linux/of.h>
> ?#include <linux/bitops.h>
> ?#include <linux/workqueue.h>
> ?#include <linux/gpio.h>
> @@ -52,7 +54,7 @@ struct pl061_gpio {
> ? ? ? ?spinlock_t ? ? ? ? ? ? ?lock; ? ? ? ? ? /* GPIO registers */
>
> ? ? ? ?void __iomem ? ? ? ? ? ?*base;
> - ? ? ? int ? ? ? ? ? ? ? ? ? ? irq_base;
> + ? ? ? struct irq_domain ? ? ? *irq_domain;
> ? ? ? ?struct gpio_chip ? ? ? ?gc;
> ?};
>
> @@ -117,18 +119,16 @@ static void pl061_set_value(struct gpio_chip *gc, unsigned offset, int value)
> ?static int pl061_to_irq(struct gpio_chip *gc, unsigned offset)
> ?{
> ? ? ? ?struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc);
> -
> - ? ? ? if (chip->irq_base <= 0)
> - ? ? ? ? ? ? ? return -EINVAL;
> -
> - ? ? ? return chip->irq_base + offset;
> + ? ? ? if (!chip->irq_domain)
> + ? ? ? ? ? ? ? return -ENXIO;
> + ? ? ? return irq_domain_to_irq(chip->irq_domain, offset);
> ?}
>
> ?static int pl061_irq_type(struct irq_data *d, unsigned trigger)
> ?{
> ? ? ? ?struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
> ? ? ? ?struct pl061_gpio *chip = gc->private;
> - ? ? ? int offset = d->irq - chip->irq_base;
> + ? ? ? int offset = d->hwirq;
> ? ? ? ?unsigned long flags;
> ? ? ? ?u8 gpiois, gpioibe, gpioiev;
>
> @@ -212,6 +212,7 @@ static void __init pl061_init_gc(struct pl061_gpio *chip, int irq_base)
>
> ? ? ? ?irq_setup_generic_chip(gc, IRQ_MSK(PL061_GPIO_NR),
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? IRQ_GC_INIT_NESTED_LOCK, IRQ_NOREQUEST, 0);
> + ? ? ? chip->irq_domain = gc->domain;

I would expect the driver to store chip->gc = gc instead.  Then the
driver has access to both structures, and if ever needed, the gc could
be freed on driver release.

> ?}
>
> ?static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
> @@ -219,7 +220,7 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
> ? ? ? ?struct pl061_platform_data *pdata;
> ? ? ? ?struct pl061_gpio *chip;
> ? ? ? ?struct list_head *chip_list;
> - ? ? ? int ret, irq, i;
> + ? ? ? int ret, irq, i, irq_base;
> ? ? ? ?static DECLARE_BITMAP(init_irq, NR_IRQS);
>
> ? ? ? ?chip = kzalloc(sizeof(*chip), GFP_KERNEL);
> @@ -229,10 +230,13 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
> ? ? ? ?pdata = dev->dev.platform_data;
> ? ? ? ?if (pdata) {
> ? ? ? ? ? ? ? ?chip->gc.base = pdata->gpio_base;
> - ? ? ? ? ? ? ? chip->irq_base = pdata->irq_base;
> + ? ? ? ? ? ? ? irq_base = pdata->irq_base;
> ? ? ? ?} else if (dev->dev.of_node) {
> ? ? ? ? ? ? ? ?chip->gc.base = -1;
> - ? ? ? ? ? ? ? chip->irq_base = 0;
> + ? ? ? ? ? ? ? if (of_get_property(dev->dev.of_node, "interrupt-controller", NULL))
> + ? ? ? ? ? ? ? ? ? ? ? irq_base = -1;
> + ? ? ? ? ? ? ? else
> + ? ? ? ? ? ? ? ? ? ? ? irq_base = 0;
> ? ? ? ?} else {
> ? ? ? ? ? ? ? ?ret = -ENODEV;
> ? ? ? ? ? ? ? ?goto free_mem;
> @@ -271,10 +275,11 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
> ? ? ? ? * irq_chip support
> ? ? ? ? */
>
> - ? ? ? if (chip->irq_base <= 0)
> + ? ? ? if (!irq_base)
> ? ? ? ? ? ? ? ?return 0;

A comment would be useful here as it took a bit for me to work out
what the options are here.  What are the possible values of irq_base
at this point, and what do they mean?

Otherwise looks pretty good.

g.

[PATCH v2] gpio: pl061: enable interrupts with DT style binding

[Rob Herring]

From: Rob Herring <rob.herring@calxeda.com>

Enable DT interrupt binding support for pl061 gpio lines. If the gpio
node has an interrupt-controller property, then it will be setup to
handle interrupts on gpio lines.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.ml.walleij@gmail.com>
---
v2:
- use domain ptr from struct irq_chip_generic
- Add comment on irq_base values.

 .../devicetree/bindings/gpio/pl061-gpio.txt        |   15 +++++++++
 drivers/gpio/gpio-pl061.c                          |   31 +++++++++++---------
 2 files changed, 32 insertions(+), 14 deletions(-)

diff --git a/Documentation/devicetree/bindings/gpio/pl061-gpio.txt b/Documentation/devicetree/bindings/gpio/pl061-gpio.txt
index a2c416b..9671d4e 100644
--- a/Documentation/devicetree/bindings/gpio/pl061-gpio.txt
+++ b/Documentation/devicetree/bindings/gpio/pl061-gpio.txt
@@ -8,3 +8,18 @@ Required properties:
 - gpio-controller : Marks the device node as a GPIO controller.
 - interrupts : Interrupt mapping for GPIO IRQ.
 
+Optional properties:
+- interrupt-controller : Identifies the node as an interrupt controller. Must
+  be present if using gpios lines for interrupts.
+- #interrupt-cells : Specifies the number of cells needed to encode an
+  interrupt source.  The type shall be a <u32> and the value shall be 2.
+
+  The 1st cell contains the interrupt number 0-7 corresponding to the gpio
+  line.
+
+  The 2nd cell is the flags, encoding trigger type and level flags.
+	1 = low-to-high edge triggered
+	2 = high-to-low edge triggered
+	4 = active high level-sensitive
+	8 = active low level-sensitive
+
diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
index 96ff6b2..ea799c7 100644
--- a/drivers/gpio/gpio-pl061.c
+++ b/drivers/gpio/gpio-pl061.c
@@ -16,6 +16,8 @@
 #include <linux/io.h>
 #include <linux/ioport.h>
 #include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/of.h>
 #include <linux/bitops.h>
 #include <linux/workqueue.h>
 #include <linux/gpio.h>
@@ -52,7 +54,6 @@ struct pl061_gpio {
 	spinlock_t		lock;		/* GPIO registers */
 
 	void __iomem		*base;
-	int			irq_base;
 	struct irq_chip_generic	*irq_gc;
 	struct gpio_chip	gc;
 };
@@ -118,18 +119,16 @@ static void pl061_set_value(struct gpio_chip *gc, unsigned offset, int value)
 static int pl061_to_irq(struct gpio_chip *gc, unsigned offset)
 {
 	struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc);
-
-	if (chip->irq_base <= 0)
-		return -EINVAL;
-
-	return chip->irq_base + offset;
+	if (!chip->irq_gc)
+		return -ENXIO;
+	return irq_domain_to_irq(&chip->irq_gc->domain, offset);
 }
 
 static int pl061_irq_type(struct irq_data *d, unsigned trigger)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
 	struct pl061_gpio *chip = gc->private;
-	int offset = d->irq - chip->irq_base;
+	int offset = d->hwirq;
 	unsigned long flags;
 	u8 gpiois, gpioibe, gpioiev;
 
@@ -219,7 +218,7 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
 	struct pl061_platform_data *pdata;
 	struct pl061_gpio *chip;
 	struct list_head *chip_list;
-	int ret, irq, i;
+	int ret, irq, i, irq_base;
 	static DECLARE_BITMAP(init_irq, NR_IRQS);
 
 	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
@@ -229,10 +228,13 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
 	pdata = dev->dev.platform_data;
 	if (pdata) {
 		chip->gc.base = pdata->gpio_base;
-		chip->irq_base = pdata->irq_base;
+		irq_base = pdata->irq_base;
 	} else if (dev->dev.of_node) {
 		chip->gc.base = -1;
-		chip->irq_base = 0;
+		if (of_get_property(dev->dev.of_node, "interrupt-controller", NULL))
+			irq_base = -1;
+		else
+			irq_base = 0;
 	} else {
 		ret = -ENODEV;
 		goto free_mem;
@@ -268,13 +270,14 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
 		goto iounmap;
 
 	/*
-	 * irq_chip support
+	 * irq_chip support. If irq_base is 0, then we don't support interrupts
+	 * on gpio lines and just return now. Otherwise setup the interrupts.
 	 */
-
-	if (chip->irq_base <= 0)
+	if (!irq_base)
 		return 0;
 
-	pl061_init_gc(chip, chip->irq_base);
+	pl061_init_gc(chip, irq_base);
+	chip->irq_gc->domain.of_node = of_node_get(dev->dev.of_node);
 
 	writeb(0, chip->base + GPIOIE); /* disable irqs */
 	irq = dev->irq[0];
-- 
1.7.5.4

[PATCH 9/9] ARM: highbank: add interrupt properties to gpio nodes

[Rob Herring]

From: Rob Herring <rob.herring@calxeda.com>

Add interrupt-controller properties to pl061 gpio nodes so gpio lines can
function as interrupts.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
---
 arch/arm/boot/dts/highbank.dts |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/arch/arm/boot/dts/highbank.dts b/arch/arm/boot/dts/highbank.dts
index aeb1a75..dfe2b49 100644
--- a/arch/arm/boot/dts/highbank.dts
+++ b/arch/arm/boot/dts/highbank.dts
@@ -89,7 +89,6 @@
 			#size-cells = <0>;
 			#address-cells = <1>;
 			interrupt-controller;
-			interrupt-parent;
 			reg = <0xfff11000 0x1000>,
 			      <0xfff10100 0x100>;
 		};
@@ -129,6 +128,8 @@
 			#gpio-cells = <2>;
 			compatible = "arm,pl061", "arm,primecell";
 			gpio-controller;
+			interrupt-controller;
+			#interrupt-cells = <2>;
 			reg = <0xfff30000 0x1000>;
 			interrupts = <0 14 4>;
 		};
@@ -137,6 +138,8 @@
 			#gpio-cells = <2>;
 			compatible = "arm,pl061", "arm,primecell";
 			gpio-controller;
+			interrupt-controller;
+			#interrupt-cells = <2>;
 			reg = <0xfff31000 0x1000>;
 			interrupts = <0 15 4>;
 		};
@@ -145,6 +148,8 @@
 			#gpio-cells = <2>;
 			compatible = "arm,pl061", "arm,primecell";
 			gpio-controller;
+			interrupt-controller;
+			#interrupt-cells = <2>;
 			reg = <0xfff32000 0x1000>;
 			interrupts = <0 16 4>;
 		};
@@ -153,6 +158,8 @@
 			#gpio-cells = <2>;
 			compatible = "arm,pl061", "arm,primecell";
 			gpio-controller;
+			interrupt-controller;
+			#interrupt-cells = <2>;
 			reg = <0xfff33000 0x1000>;
 			interrupts = <0 17 4>;
 		};
-- 
1.7.5.4

[PATCH 9/9] ARM: highbank: add interrupt properties to gpio nodes

[Grant Likely]

On Wed, Dec 14, 2011 at 8:28 AM, Rob Herring <robherring2@gmail.com> wrote:
> From: Rob Herring <rob.herring@calxeda.com>
>
> Add interrupt-controller properties to pl061 gpio nodes so gpio lines can
> function as interrupts.
>
> Signed-off-by: Rob Herring <rob.herring@calxeda.com>

Acked-by: Grant Likely <grant.likely@secretlab.ca>

> ---
> ?arch/arm/boot/dts/highbank.dts | ? ?9 ++++++++-
> ?1 files changed, 8 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/boot/dts/highbank.dts b/arch/arm/boot/dts/highbank.dts
> index aeb1a75..dfe2b49 100644
> --- a/arch/arm/boot/dts/highbank.dts
> +++ b/arch/arm/boot/dts/highbank.dts
> @@ -89,7 +89,6 @@
> ? ? ? ? ? ? ? ? ? ? ? ?#size-cells = <0>;
> ? ? ? ? ? ? ? ? ? ? ? ?#address-cells = <1>;
> ? ? ? ? ? ? ? ? ? ? ? ?interrupt-controller;
> - ? ? ? ? ? ? ? ? ? ? ? interrupt-parent;
> ? ? ? ? ? ? ? ? ? ? ? ?reg = <0xfff11000 0x1000>,
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?<0xfff10100 0x100>;
> ? ? ? ? ? ? ? ?};
> @@ -129,6 +128,8 @@
> ? ? ? ? ? ? ? ? ? ? ? ?#gpio-cells = <2>;
> ? ? ? ? ? ? ? ? ? ? ? ?compatible = "arm,pl061", "arm,primecell";
> ? ? ? ? ? ? ? ? ? ? ? ?gpio-controller;
> + ? ? ? ? ? ? ? ? ? ? ? interrupt-controller;
> + ? ? ? ? ? ? ? ? ? ? ? #interrupt-cells = <2>;
> ? ? ? ? ? ? ? ? ? ? ? ?reg = <0xfff30000 0x1000>;
> ? ? ? ? ? ? ? ? ? ? ? ?interrupts = <0 14 4>;
> ? ? ? ? ? ? ? ?};
> @@ -137,6 +138,8 @@
> ? ? ? ? ? ? ? ? ? ? ? ?#gpio-cells = <2>;
> ? ? ? ? ? ? ? ? ? ? ? ?compatible = "arm,pl061", "arm,primecell";
> ? ? ? ? ? ? ? ? ? ? ? ?gpio-controller;
> + ? ? ? ? ? ? ? ? ? ? ? interrupt-controller;
> + ? ? ? ? ? ? ? ? ? ? ? #interrupt-cells = <2>;
> ? ? ? ? ? ? ? ? ? ? ? ?reg = <0xfff31000 0x1000>;
> ? ? ? ? ? ? ? ? ? ? ? ?interrupts = <0 15 4>;
> ? ? ? ? ? ? ? ?};
> @@ -145,6 +148,8 @@
> ? ? ? ? ? ? ? ? ? ? ? ?#gpio-cells = <2>;
> ? ? ? ? ? ? ? ? ? ? ? ?compatible = "arm,pl061", "arm,primecell";
> ? ? ? ? ? ? ? ? ? ? ? ?gpio-controller;
> + ? ? ? ? ? ? ? ? ? ? ? interrupt-controller;
> + ? ? ? ? ? ? ? ? ? ? ? #interrupt-cells = <2>;
> ? ? ? ? ? ? ? ? ? ? ? ?reg = <0xfff32000 0x1000>;
> ? ? ? ? ? ? ? ? ? ? ? ?interrupts = <0 16 4>;
> ? ? ? ? ? ? ? ?};
> @@ -153,6 +158,8 @@
> ? ? ? ? ? ? ? ? ? ? ? ?#gpio-cells = <2>;
> ? ? ? ? ? ? ? ? ? ? ? ?compatible = "arm,pl061", "arm,primecell";
> ? ? ? ? ? ? ? ? ? ? ? ?gpio-controller;
> + ? ? ? ? ? ? ? ? ? ? ? interrupt-controller;
> + ? ? ? ? ? ? ? ? ? ? ? #interrupt-cells = <2>;
> ? ? ? ? ? ? ? ? ? ? ? ?reg = <0xfff33000 0x1000>;
> ? ? ? ? ? ? ? ? ? ? ? ?interrupts = <0 17 4>;
> ? ? ? ? ? ? ? ?};
> --
> 1.7.5.4
>



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

[PATCH 0/9] irq domain for gen irq chip and pl061 DT irq support

[Rob Herring]

On 12/14/2011 09:28 AM, Rob Herring wrote:
> From: Rob Herring <rob.herring@calxeda.com>
> 
> This series adds irq_domain support to generic irq chip, converts the
> pl061 gpio driver to use generic irq chip, and finally adds DT irq binding
> support for pl061. The pl061 driver is also fixed to use 0 for no irq
> instead of -1 or NO_IRQ.
> 
> The irq_domain support should be transparent to users of generic irq
> chip. Shawn Guo has tested previous version with i.MX AVIC and his fixes
> have been incorporated. Any testing by other users of generic irq chip
> is appreciated.
> 
> This series is also dependent on:
> 
> irqdomain: export irq_domain_simple_ops for !CONFIG_OF
> http://www.spinics.net/lists/arm-kernel/msg150290.html
> 
> gpio: pl061: drop extra check for NULL platform_data
> http://www.spinics.net/lists/arm-kernel/msg151701.html
> 
> Tested on highbank and built all defconfigs.
> 
> Rob

Forgot to mention this series is also available here:

git://sources.calxeda.com/kernel/linux.git pl061-domain

Rob