Re: [PATCH v2 2/4] i2c/busses/i2c-icy: Add LTC2990 present on 2019 board revision

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On 08/13/2019 09:03 AM, Geert Uytterhoeven wrote:
Hi Max,

On Tue, Aug 13, 2019 at 1:53 AM Max Staudt <max@xxxxxxxxx> wrote:
Since the 2019 a1k.org community re-print of these PCBs sports an
LTC2990 hwmon chip as an example use case, let this driver autoprobe
for that as well. If it is present, modprobing ltc2990 is sufficient.

Signed-off-by: Max Staudt <max@xxxxxxxxx>

Thanks for your patch!

--- a/drivers/i2c/busses/i2c-icy.c
+++ b/drivers/i2c/busses/i2c-icy.c
@@ -160,6 +180,8 @@ static void icy_remove(struct zorro_dev *z)
 {
        struct icy_i2c *i2c = dev_get_drvdata(&z->dev);

+       i2c_unregister_device(i2c->client_ltc2990);

Is this needed?
In my understanding, i2c_del_adapter() below takes care of that.
It seems to do that in i2c_del_adapter():

  device_for_each_child(&adap->dev, NULL, __unregister_dummy);


However, I'm not sure I'm supposed to do that. I went by Documentation/i2c/instantiating-devices, which in "Method 2" says:

  The driver which instantiated the I2C device is responsible for destroying
  it on cleanup. This is done by calling i2c_unregister_device() on the
  pointer that was earlier returned by i2c_new_device() or
  i2c_new_probed_device().


So, what is preferred and why?


Thanks!

Max



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