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>

diff --git a/drivers/regulator/da9210-regulator.c b/drivers/regulator/da9210-regulator.c
index bc6100103f7f476e7381482a404f33ea01851fad..f0489cb9018b4e7895937d330d077e100783fc16 100644 (file)
--- a/drivers/regulator/da9210-regulator.c
+++ b/drivers/regulator/da9210-regulator.c
@@ -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");