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authorBenoit Cousson <b-cousson@ti.com>2012-02-29 19:40:31 +0100
committerSamuel Ortiz <sameo@linux.intel.com>2012-03-22 13:04:33 +0100
commit78518ffa08fceee42d61359303c58bdd0a82033f (patch)
tree3db4458970c145e8b82fa8a31536c700a4479aee /drivers/mfd/twl6030-irq.c
parent1b8f333ff49f778a1215f65754c31c02408d1d08 (diff)
downloadop-kernel-dev-78518ffa08fceee42d61359303c58bdd0a82033f.zip
op-kernel-dev-78518ffa08fceee42d61359303c58bdd0a82033f.tar.gz
mfd: Move twl-core IRQ allocation into twl[4030|6030]-irq files
During DT adaptation, the irq_alloc_desc was added into twl-core, but due to the rather different and weird IRQ management required by the twl4030, it is much better to have a different approach for it. The issue is that twl4030 uses a two level IRQ mechanism but handles all the PWR interrupts as part of the twl-core interrupt range. It ends up with a range of 16 interrupts total for CORE and PWR. The other twl4030 functionalities already have a dedicated driver and thus their IRQs and irqdomain can and should be defined localy. twl6030 is using a single level IRQ controller and thus does not require any trick. Move the irq_alloc_desc and irq_domain_add_legacy in twl4030-irq and twl6030-irq. Allocate together CORE and PWR IRQs for twl4030-irq. Conflicts: drivers/mfd/twl-core.c Signed-off-by: Benoit Cousson <b-cousson@ti.com> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/twl6030-irq.c')
-rw-r--r--drivers/mfd/twl6030-irq.c31
1 files changed, 22 insertions, 9 deletions
diff --git a/drivers/mfd/twl6030-irq.c b/drivers/mfd/twl6030-irq.c
index bb3d762..86c4082 100644
--- a/drivers/mfd/twl6030-irq.c
+++ b/drivers/mfd/twl6030-irq.c
@@ -39,6 +39,8 @@
#include <linux/i2c/twl.h>
#include <linux/platform_device.h>
#include <linux/suspend.h>
+#include <linux/of.h>
+#include <linux/irqdomain.h>
#include "twl-core.h"
@@ -53,6 +55,7 @@
* specifies mapping between interrupt number and the associated module.
*
*/
+#define TWL6030_NR_IRQS 20
static int twl6030_interrupt_mapping[24] = {
PWR_INTR_OFFSET, /* Bit 0 PWRON */
@@ -246,11 +249,6 @@ static int twl6030_irq_set_wake(struct irq_data *d, unsigned int on)
return 0;
}
-/*----------------------------------------------------------------------*/
-
-static unsigned twl6030_irq_next;
-
-/*----------------------------------------------------------------------*/
int twl6030_interrupt_unmask(u8 bit_mask, u8 offset)
{
int ret;
@@ -350,8 +348,10 @@ int twl6030_mmc_card_detect(struct device *dev, int slot)
}
EXPORT_SYMBOL(twl6030_mmc_card_detect);
-int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end)
+int twl6030_init_irq(struct device *dev, int irq_num)
{
+ struct device_node *node = dev->of_node;
+ int nr_irqs, irq_base, irq_end;
int status = 0;
int i;
@@ -360,6 +360,20 @@ int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end)
u8 mask[4];
static struct irq_chip twl6030_irq_chip;
+
+ nr_irqs = TWL6030_NR_IRQS;
+
+ irq_base = irq_alloc_descs(-1, 0, nr_irqs, 0);
+ if (IS_ERR_VALUE(irq_base)) {
+ dev_err(dev, "Fail to allocate IRQ descs\n");
+ return irq_base;
+ }
+
+ irq_domain_add_legacy(node, nr_irqs, irq_base, 0,
+ &irq_domain_simple_ops, NULL);
+
+ irq_end = irq_base + nr_irqs;
+
mask[1] = 0xFF;
mask[2] = 0xFF;
mask[3] = 0xFF;
@@ -387,9 +401,8 @@ int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end)
activate_irq(i);
}
- twl6030_irq_next = i;
pr_info("twl6030: %s (irq %d) chaining IRQs %d..%d\n", "PIH",
- irq_num, irq_base, twl6030_irq_next - 1);
+ irq_num, irq_base, irq_end);
/* install an irq handler to demultiplex the TWL6030 interrupt */
init_completion(&irq_event);
@@ -410,7 +423,7 @@ int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end)
twl_irq = irq_num;
register_pm_notifier(&twl6030_irq_pm_notifier_block);
- return status;
+ return irq_base;
fail_kthread:
free_irq(irq_num, &irq_event);
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