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regulator: da9210: Mask all interrupt sources to deassert interrupt line 

After boot-up, some events may be set, and cause the da9210 interrupt
line to be asserted. As the da9210 driver doesn't have interrupt support
yet, this causes havoc on systems where the interrupt line is shared
among multiple devices.

This is the case on e.g. r8a7791/koelsch, where the interrupt line is
shared with a da9063 regulator, and the following events are set:

    EVENT_A = 0x00000011 (GPI0 | GPI4)
    EVENT_B = 0x00000002 (NPWRGOOD)

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Geert Uytterhoeven 2015-02-17 13:11:11 +01:00 committed by Mark Brown
parent bfa76d4957
commit 4d9cbff5aa
1 changed files with 9 additions and 0 deletions
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9
drivers/regulator/da9210-regulator.c
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@ -152,6 +152,15 @@ static int da9210_i2c_probe(struct i2c_client *i2c,
config.regmap = chip->regmap;
config.of_node = dev->of_node;
/* Mask all interrupt sources to deassert interrupt line */
error = regmap_write(chip->regmap, DA9210_REG_MASK_A, ~0);
if (!error)
error = regmap_write(chip->regmap, DA9210_REG_MASK_B, ~0);
if (error) {
dev_err(&i2c->dev, "Failed to write to mask reg: %d\n", error);
return error;
}
rdev = devm_regulator_register(&i2c->dev, &da9210_reg, &config);
if (IS_ERR(rdev)) {
dev_err(&i2c->dev, "Failed to register DA9210 regulator\n");