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mfd: Make twl4030 SIH SPARSE_IRQ capable

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twl4030 is using a two level irq controllers infrastruture.
So far, only the first level was using dynamic irq_desc allocation
to be able to have irq_domain support for device tree.
There is a need to allocate separate irq_descs for the SIH too to
avoid hacking the first level with interrupts from the second level.

Add an irq_base parameter to allow the caller to provide the base from
pdata or from dynamic allocation.

Affect TWL4030_NR_IRQS to the twl-core IRQs only.

Moreover that will allow the extraction of the of_node pointer for further
Device Tree conversion.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Benoit Cousson 2012-02-29 22:38:06 +01:00 committed by Samuel Ortiz
parent 78518ffa08
commit f01b1f90bf
3 changed files with 9 additions and 19 deletions
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3
drivers/gpio/gpio-twl4030.c
View File

@ -404,7 +404,8 @@ static int __devinit gpio_twl4030_probe(struct platform_device *pdev)
"can't dispatch IRQs from modules\n");
goto no_irqs;
}
ret = twl4030_sih_setup(TWL4030_MODULE_GPIO);
ret = twl4030_sih_setup(&pdev->dev, TWL4030_MODULE_GPIO,
pdata->irq_base);
if (ret < 0)
return ret;
WARN_ON(ret != pdata->irq_base);

23
drivers/mfd/twl4030-irq.c
View File

@ -629,28 +629,21 @@ static irqreturn_t handle_twl4030_sih(int irq, void *data)
return IRQ_HANDLED;
}
static unsigned twl4030_irq_next;
/* returns the first IRQ used by this SIH bank, or negative errno */
int twl4030_sih_setup(int module)
int twl4030_sih_setup(struct device *dev, int module, int irq_base)
{
int sih_mod;
const struct sih *sih = NULL;
struct sih_agent *agent;
int i, irq;
int status = -EINVAL;
unsigned irq_base = twl4030_irq_next;
/* only support modules with standard clear-on-read for now */
for (sih_mod = 0, sih = sih_modules;
sih_mod < nr_sih_modules;
sih_mod++, sih++) {
if (sih->module == module && sih->set_cor) {
if (!WARN((irq_base + sih->bits) > NR_IRQS,
"irq %d for %s too big\n",
irq_base + sih->bits,
sih->name))
status = 0;
status = 0;
break;
}
}
@ -661,8 +654,6 @@ int twl4030_sih_setup(int module)
if (!agent)
return -ENOMEM;
status = 0;
agent->irq_base = irq_base;
agent->sih = sih;
agent->imr = ~0;
@ -678,8 +669,6 @@ int twl4030_sih_setup(int module)
activate_irq(irq);
}
twl4030_irq_next += i;
/* replace generic PIH handler (handle_simple_irq) */
irq = sih_mod + twl4030_irq_base;
irq_set_handler_data(irq, agent);
@ -688,7 +677,7 @@ int twl4030_sih_setup(int module)
agent->irq_name ?: sih->name, NULL);
pr_info("twl4030: %s (irq %d) chaining IRQs %d..%d\n", sih->name,
irq, irq_base, twl4030_irq_next - 1);
irq, irq_base, irq_base + i - 1);
return status < 0 ? status : irq_base;
}
@ -752,12 +741,12 @@ int twl4030_init_irq(struct device *dev, int irq_num)
irq_set_nested_thread(i, 1);
activate_irq(i);
}
twl4030_irq_next = i;
pr_info("twl4030: %s (irq %d) chaining IRQs %d..%d\n", "PIH",
irq_num, irq_base, twl4030_irq_next - 1);
irq_num, irq_base, irq_end);
/* ... and the PWR_INT module ... */
status = twl4030_sih_setup(TWL4030_MODULE_INT);
status = twl4030_sih_setup(dev, TWL4030_MODULE_INT, irq_end);
if (status < 0) {
pr_err("twl4030: sih_setup PWR INT --> %d\n", status);
goto fail;

2
include/linux/i2c/twl.h
View File

@ -751,7 +751,7 @@ struct twl4030_platform_data {
/*----------------------------------------------------------------------*/
int twl4030_sih_setup(int module);
int twl4030_sih_setup(struct device *dev, int module, int irq_base);
/* Offsets to Power Registers */
#define TWL4030_VDAC_DEV_GRP 0x3B