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mfd: da9063: Occupy second I2C address 

The second address can be used as a shortcut to access register pages
2+3. The driver does not use this feature yet. The second address should
still be marked as used, otherwise userspace could interfere with the
driver.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Peter Rosin <peda@axentia.se>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Link: https://patch.msgid.link/20251023065610.2855-2-wsa+renesas@sang-engineering.com
Signed-off-by: Lee Jones <lee@kernel.org>
pull/1354/merge
Wolfram Sang 2025-10-23 08:55:59 +02:00 committed by Lee Jones
parent 78bf081ddf
commit 18597dbccf
1 changed files with 3 additions and 0 deletions
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3
drivers/mfd/da9063-i2c.c
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@ -469,6 +469,9 @@ static int da9063_i2c_probe(struct i2c_client *i2c)
}
}
/* Reserve our unused second address so userspace won't interfere */
devm_i2c_new_dummy_device(&i2c->dev, i2c->adapter, i2c->addr + 1);
return da9063_device_init(da9063, i2c->irq);
}