diff options
| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2025-10-23 08:55:59 +0200 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2025-11-06 14:03:46 +0000 |
| commit | 18597dbccfa5a99ccb7278046234c0ae29ec7a19 (patch) | |
| tree | 5c0708604ee756ade347c615532da5849162e43f | |
| parent | 78bf081ddf39ba83b551f96d42fe2e4a8fda8718 (diff) | |
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>
| -rw-r--r-- | drivers/mfd/da9063-i2c.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mfd/da9063-i2c.c b/drivers/mfd/da9063-i2c.c index 1ec9ab56442d..a803b7440f09 100644 --- a/drivers/mfd/da9063-i2c.c +++ b/drivers/mfd/da9063-i2c.c @@ -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); } |