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regmap: regmap-irq/gpio-max77620: add level-irq support

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Add level active IRQ support to regmap-irq irqchip. Change breaks
existing regmap-irq type setting. Convert the existing drivers which
use regmap-irq with trigger type setting (gpio-max77620) to work
with this new approach. So we do not magically support level-active
IRQs on gpio-max77620 - but add support to the regmap-irq for chips
which support them =)

We do not support distinguishing situation where HW supports rising
and falling edge detection but not both. Separating this would require
inventing yet another flags for IRQ types.

Signed-off-by: Matti Vaittinen <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
This commit is contained in:
Matti Vaittinen 2018-12-18 13:59:31 +02:00 • committed by Mark Brown
commit 1c2928e3e3
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GPG key ID: 24D68B725D5487D0
3 changed files with 110 additions and 48 deletions
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35
drivers/base/regmap/regmap-irq.c
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@ -199,7 +199,7 @@ static void regmap_irq_enable(struct irq_data *data)
const struct regmap_irq *irq_data = irq_to_regmap_irq(d, data->hwirq);
unsigned int mask, type;
type = irq_data->type_falling_mask | irq_data->type_rising_mask;
type = irq_data->type.type_falling_val | irq_data->type.type_rising_val;
/*
* The type_in_mask flag means that the underlying hardware uses
@ -234,27 +234,42 @@ static int regmap_irq_set_type(struct irq_data *data, unsigned int type)
struct regmap_irq_chip_data *d = irq_data_get_irq_chip_data(data);
struct regmap *map = d->map;
const struct regmap_irq *irq_data = irq_to_regmap_irq(d, data->hwirq);
int reg = irq_data->type_reg_offset / map->reg_stride;
int reg;
const struct regmap_irq_type *t = &irq_data->type;
if (!(irq_data->type_rising_mask | irq_data->type_falling_mask))
return 0;
if ((t->types_supported & type) != type)
return -ENOTSUPP;
d->type_buf[reg] &= ~(irq_data->type_falling_mask |
irq_data->type_rising_mask);
reg = t->type_reg_offset / map->reg_stride;
if (t->type_reg_mask)
d->type_buf[reg] &= ~t->type_reg_mask;
else
d->type_buf[reg] &= ~(t->type_falling_val |
t->type_rising_val |
t->type_level_low_val |
t->type_level_high_val);
switch (type) {
case IRQ_TYPE_EDGE_FALLING:
d->type_buf[reg] |= irq_data->type_falling_mask;
d->type_buf[reg] |= t->type_falling_val;
break;
case IRQ_TYPE_EDGE_RISING:
d->type_buf[reg] |= irq_data->type_rising_mask;
d->type_buf[reg] |= t->type_rising_val;
break;
case IRQ_TYPE_EDGE_BOTH:
d->type_buf[reg] |= (irq_data->type_falling_mask |
irq_data->type_rising_mask);
d->type_buf[reg] |= (t->type_falling_val |
t->type_rising_val);
break;
case IRQ_TYPE_LEVEL_HIGH:
d->type_buf[reg] |= t->type_level_high_val;
break;
case IRQ_TYPE_LEVEL_LOW:
d->type_buf[reg] |= t->type_level_low_val;
break;
default:
return -EINVAL;
}