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Subject[PATCH V4] mfd: da9062: add support for interrupt polarity defined in device tree
The da9062 interrupt handler cannot necessarily be low active.
Add a function to configure the interrupt type based on what is defined in the device tree.
The allowable interrupt type is either low or high level trigger.

Signed-off-by: Shreyas Joshi <shreyas.joshi@biamp.com>
---
drivers/mfd/da9062-core.c | 40 ++++++++++++++++++++++++++++++++++++---
1 file changed, 37 insertions(+), 3 deletions(-)

diff --git a/drivers/mfd/da9062-core.c b/drivers/mfd/da9062-core.c
index 419c73533401..6d9b60cb745d 100644
--- a/drivers/mfd/da9062-core.c
+++ b/drivers/mfd/da9062-core.c
@@ -369,6 +369,33 @@ static int da9062_get_device_type(struct da9062 *chip)
return ret;
}

+static u32 da9062_configure_irq_type(struct da9062 *chip, int irq, u32 *trigger)
+{
+ u32 irq_type = 0;
+ struct irq_data *irq_data = irq_get_irq_data(irq);
+
+ if (!irq_data) {
+ dev_err(chip->dev, "Invalid IRQ: %d\n", irq);
+ return -EINVAL;
+ }
+ *trigger = irqd_get_trigger_type(irq_data);
+
+ switch (*trigger) {
+ case IRQ_TYPE_LEVEL_HIGH:
+ irq_type = 1;
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ irq_type = 0;
+ break;
+ default:
+ dev_warn(chip->dev, "Unsupported IRQ type: %d\n", *trigger);
+ return -EINVAL;
+ }
+ return regmap_update_bits(chip->regmap, DA9062AA_CONFIG_A,
+ DA9062AA_IRQ_TYPE_MASK,
+ irq_type << DA9062AA_IRQ_TYPE_SHIFT);
+}
+
static const struct regmap_range da9061_aa_readable_ranges[] = {
regmap_reg_range(DA9062AA_PAGE_CON, DA9062AA_STATUS_B),
regmap_reg_range(DA9062AA_STATUS_D, DA9062AA_EVENT_C),
@@ -417,6 +444,7 @@ static const struct regmap_range da9061_aa_writeable_ranges[] = {
regmap_reg_range(DA9062AA_VBUCK1_A, DA9062AA_VBUCK4_A),
regmap_reg_range(DA9062AA_VBUCK3_A, DA9062AA_VBUCK3_A),
regmap_reg_range(DA9062AA_VLDO1_A, DA9062AA_VLDO4_A),
+ regmap_reg_range(DA9062AA_CONFIG_A, DA9062AA_CONFIG_B),
regmap_reg_range(DA9062AA_VBUCK1_B, DA9062AA_VBUCK4_B),
regmap_reg_range(DA9062AA_VBUCK3_B, DA9062AA_VBUCK3_B),
regmap_reg_range(DA9062AA_VLDO1_B, DA9062AA_VLDO4_B),
@@ -596,6 +624,7 @@ static int da9062_i2c_probe(struct i2c_client *i2c,
const struct regmap_irq_chip *irq_chip;
const struct regmap_config *config;
int cell_num;
+ u32 trigger_type = 0;
int ret;

chip = devm_kzalloc(&i2c->dev, sizeof(*chip), GFP_KERNEL);
@@ -654,10 +683,15 @@ static int da9062_i2c_probe(struct i2c_client *i2c,
if (ret)
return ret;

+ ret = da9062_configure_irq_type(chip, i2c->irq, &trigger_type);
+ if (ret < 0) {
+ dev_err(chip->dev, "Failed to configure IRQ type\n");
+ return ret;
+ }
+
ret = regmap_add_irq_chip(chip->regmap, i2c->irq,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
- -1, irq_chip,
- &chip->regmap_irq);
+ trigger_type | IRQF_SHARED | IRQF_ONESHOT,
+ -1, irq_chip, &chip->regmap_irq);
if (ret) {
dev_err(chip->dev, "Failed to request IRQ %d: %d\n",
i2c->irq, ret);
--
2.20.1
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