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authorMark Brown <broonie@opensource.wolfsonmicro.com>2012-05-18 17:02:02 +0100
committerSamuel Ortiz <sameo@linux.intel.com>2012-05-20 17:27:14 +0200
commit1fe17a24e2fe0a9554d19a4249eb2d80050ecb8c (patch)
tree9368a59bbdf4a0ba33a8bed514076acd2c31ec86 /drivers/mfd
parentc48bf153f293894d232ee44f5bff99c523a06585 (diff)
mfd: Emulate active low IRQs as well as active high IRQs for wm831x
As with the existing emulation this should not be used in production systems but is useful for test purposes. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/wm831x-irq.c24
1 files changed, 19 insertions, 5 deletions
diff --git a/drivers/mfd/wm831x-irq.c b/drivers/mfd/wm831x-irq.c
index ecc9d6d62fad..804e56ec99eb 100644
--- a/drivers/mfd/wm831x-irq.c
+++ b/drivers/mfd/wm831x-irq.c
@@ -413,22 +413,25 @@ static int wm831x_irq_set_type(struct irq_data *data, unsigned int type)
* do the update here as we can be called with the bus lock
* held.
*/
+ wm831x->gpio_level_low[irq] = false;
+ wm831x->gpio_level_high[irq] = false;
switch (type) {
case IRQ_TYPE_EDGE_BOTH:
wm831x->gpio_update[irq] = 0x10000 | WM831X_GPN_INT_MODE;
- wm831x->gpio_level[irq] = false;
break;
case IRQ_TYPE_EDGE_RISING:
wm831x->gpio_update[irq] = 0x10000 | WM831X_GPN_POL;
- wm831x->gpio_level[irq] = false;
break;
case IRQ_TYPE_EDGE_FALLING:
wm831x->gpio_update[irq] = 0x10000;
- wm831x->gpio_level[irq] = false;
break;
case IRQ_TYPE_LEVEL_HIGH:
wm831x->gpio_update[irq] = 0x10000 | WM831X_GPN_POL;
- wm831x->gpio_level[irq] = true;
+ wm831x->gpio_level_high[irq] = true;
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ wm831x->gpio_update[irq] = 0x10000;
+ wm831x->gpio_level_low[irq] = true;
break;
default:
return -EINVAL;
@@ -517,7 +520,7 @@ static irqreturn_t wm831x_irq_thread(int irq, void *data)
* status. This is sucky but improves interoperability.
*/
if (primary == WM831X_GP_INT &&
- wm831x->gpio_level[i - WM831X_IRQ_GPIO_1]) {
+ wm831x->gpio_level_high[i - WM831X_IRQ_GPIO_1]) {
ret = wm831x_reg_read(wm831x, WM831X_GPIO_LEVEL);
while (ret & 1 << (i - WM831X_IRQ_GPIO_1)) {
handle_nested_irq(irq_find_mapping(wm831x->irq_domain,
@@ -526,6 +529,17 @@ static irqreturn_t wm831x_irq_thread(int irq, void *data)
WM831X_GPIO_LEVEL);
}
}
+
+ if (primary == WM831X_GP_INT &&
+ wm831x->gpio_level_low[i - WM831X_IRQ_GPIO_1]) {
+ ret = wm831x_reg_read(wm831x, WM831X_GPIO_LEVEL);
+ while (!(ret & 1 << (i - WM831X_IRQ_GPIO_1))) {
+ handle_nested_irq(irq_find_mapping(wm831x->irq_domain,
+ i));
+ ret = wm831x_reg_read(wm831x,
+ WM831X_GPIO_LEVEL);
+ }
+ }
}
out: