* [PATCH 4/4 v2] gpio/tegra: convert to use linear irqdomain
@ 2012-10-19 10:54 Linus Walleij
2012-10-19 16:12 ` Stephen Warren
2012-11-21 15:06 ` Grant Likely
0 siblings, 2 replies; 3+ messages in thread
From: Linus Walleij @ 2012-10-19 10:54 UTC (permalink / raw)
To: linux-kernel; +Cc: Linus Walleij, Rob Herring, Grant Likely, Stephen Warren
The Tegra driver tries to do the work of irq_domain_add_linear()
by reserving a bunch of descriptors somewhere and keeping track
of the base offset, then calling irq_domain_add_legacy(). Let's
stop doing that and simply use the linear IRQ domain.
For this to work: use irq_create_mapping() in the IRQ iterator
so that the descriptors get allocated here.
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v1->v2:
- Make sure that irq_create_mapping() is called for every IRQ
on probe() and update the commit message.
---
drivers/gpio/gpio-tegra.c | 14 +++++---------
1 file changed, 5 insertions(+), 9 deletions(-)
diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c
index d982593..c7c175a 100644
--- a/drivers/gpio/gpio-tegra.c
+++ b/drivers/gpio/gpio-tegra.c
@@ -380,7 +380,6 @@ static int __devinit tegra_gpio_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
struct tegra_gpio_soc_config *config;
- int irq_base;
struct resource *res;
struct tegra_gpio_bank *bank;
int gpio;
@@ -417,14 +416,11 @@ static int __devinit tegra_gpio_probe(struct platform_device *pdev)
return -ENODEV;
}
- irq_base = irq_alloc_descs(-1, 0, tegra_gpio_chip.ngpio, 0);
- if (irq_base < 0) {
- dev_err(&pdev->dev, "Couldn't allocate IRQ numbers\n");
- return -ENODEV;
- }
- irq_domain = irq_domain_add_legacy(pdev->dev.of_node,
- tegra_gpio_chip.ngpio, irq_base, 0,
+ irq_domain = irq_domain_add_linear(pdev->dev.of_node,
+ tegra_gpio_chip.ngpio,
&irq_domain_simple_ops, NULL);
+ if (!irq_domain)
+ return -ENODEV;
for (i = 0; i < tegra_gpio_bank_count; i++) {
res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
@@ -464,7 +460,7 @@ static int __devinit tegra_gpio_probe(struct platform_device *pdev)
gpiochip_add(&tegra_gpio_chip);
for (gpio = 0; gpio < tegra_gpio_chip.ngpio; gpio++) {
- int irq = irq_find_mapping(irq_domain, gpio);
+ int irq = irq_create_mapping(irq_domain, gpio);
/* No validity check; all Tegra GPIOs are valid IRQs */
bank = &tegra_gpio_banks[GPIO_BANK(gpio)];
--
1.7.11.7
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH 4/4 v2] gpio/tegra: convert to use linear irqdomain
2012-10-19 10:54 [PATCH 4/4 v2] gpio/tegra: convert to use linear irqdomain Linus Walleij
@ 2012-10-19 16:12 ` Stephen Warren
2012-11-21 15:06 ` Grant Likely
1 sibling, 0 replies; 3+ messages in thread
From: Stephen Warren @ 2012-10-19 16:12 UTC (permalink / raw)
To: Linus Walleij; +Cc: linux-kernel, Rob Herring, Grant Likely, Stephen Warren
On 10/19/2012 04:54 AM, Linus Walleij wrote:
> The Tegra driver tries to do the work of irq_domain_add_linear()
> by reserving a bunch of descriptors somewhere and keeping track
> of the base offset, then calling irq_domain_add_legacy(). Let's
> stop doing that and simply use the linear IRQ domain.
>
> For this to work: use irq_create_mapping() in the IRQ iterator
> so that the descriptors get allocated here.
Tested-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH 4/4 v2] gpio/tegra: convert to use linear irqdomain
2012-10-19 10:54 [PATCH 4/4 v2] gpio/tegra: convert to use linear irqdomain Linus Walleij
2012-10-19 16:12 ` Stephen Warren
@ 2012-11-21 15:06 ` Grant Likely
1 sibling, 0 replies; 3+ messages in thread
From: Grant Likely @ 2012-11-21 15:06 UTC (permalink / raw)
To: Linus Walleij, linux-kernel; +Cc: Linus Walleij, Rob Herring, Stephen Warren
On Fri, 19 Oct 2012 12:54:12 +0200, Linus Walleij <linus.walleij@linaro.org> wrote:
> The Tegra driver tries to do the work of irq_domain_add_linear()
> by reserving a bunch of descriptors somewhere and keeping track
> of the base offset, then calling irq_domain_add_legacy(). Let's
> stop doing that and simply use the linear IRQ domain.
>
> For this to work: use irq_create_mapping() in the IRQ iterator
> so that the descriptors get allocated here.
>
> Cc: Rob Herring <rob.herring@calxeda.com>
> Cc: Grant Likely <grant.likely@secretlab.ca>
> Cc: Stephen Warren <swarren@nvidia.com>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Applied, thanks.
g.
^ permalink raw reply [flat|nested] 3+ messages in thread
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