Re: [PATCH v3 6/7] clk: clk-imx8mp-audiomix: use the auxiliary device creation helper

[Ira Weiny <ira.weiny@intel.com>]

Jerome Brunet wrote:
> On Fri 14 Feb 2025 at 10:15, Ira Weiny <ira.weiny@intel.com> wrote:
> 
> > Jerome Brunet wrote:
> >> The auxiliary device creation of this driver is simple enough to
> >> use the available auxiliary device creation helper.
> >> 
> >> Use it and remove some boilerplate code.
> >> 
> >> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
> >> ---
> >>  drivers/clk/imx/clk-imx8mp-audiomix.c | 56 ++++-------------------------------
> >>  1 file changed, 6 insertions(+), 50 deletions(-)
> >> 
> >> diff --git a/drivers/clk/imx/clk-imx8mp-audiomix.c b/drivers/clk/imx/clk-imx8mp-audiomix.c
> >> index c409fc7e061869988f83c7df3ef7860500426323..988a5fffeb4e0e481ec57038d9d1f1b43432fc98 100644
> >> --- a/drivers/clk/imx/clk-imx8mp-audiomix.c
> >> +++ b/drivers/clk/imx/clk-imx8mp-audiomix.c
> >> @@ -228,64 +228,20 @@ struct clk_imx8mp_audiomix_priv {
> >>  	struct clk_hw_onecell_data clk_data;
> >>  };
> >>  
> >> -#if IS_ENABLED(CONFIG_RESET_CONTROLLER)
> >
> > I see the Kconfig ...
> >
> >         select AUXILIARY_BUS if RESET_CONTROLLER
> >
> > But I don't see how this code is omitted without AUXILIARY_BUS.  Is this
> > kconfig check safe to remove?
> 
> Ahhh that's what this directive was for.
> 
> I thought it was really odd to have an #if on RESET while auxialiary
> device was supposed to properly decouple the clock and reset part.
> 
> To keep things as they were I'll add an #if on CONFIG_AUXILIARY_BUS I
> wonder if this driver should select CONFIG_AUXILIARY_BUS instead ?

I wonder if .../imx/clk-imx8mp-audiomix.c should be conditionally compiled
based off of AUXILIARY_BUS?  That is what I expected to see when I dug
into the Kconfig/Makefile but it is not there AFAICS.

I think for this patch it is best to leave the kconfig as it was.  But it
seems this is a place which could be cleaned up by the folks who work on
this driver?

Ira

> 
> >
> > Ira
> >
> >> -
> >> -static void clk_imx8mp_audiomix_reset_unregister_adev(void *_adev)
> >> -{
> >> -	struct auxiliary_device *adev = _adev;
> >> -
> >> -	auxiliary_device_delete(adev);
> >> -	auxiliary_device_uninit(adev);
> >> -}
> >> -
> >> -static void clk_imx8mp_audiomix_reset_adev_release(struct device *dev)
> >> +static int clk_imx8mp_audiomix_reset_controller_register(struct device *dev)
> >>  {
> >> -	struct auxiliary_device *adev = to_auxiliary_dev(dev);
> >> -
> >> -	kfree(adev);
> >> -}
> >> -
> >> -static int clk_imx8mp_audiomix_reset_controller_register(struct device *dev,
> >> -							 struct clk_imx8mp_audiomix_priv *priv)
> >> -{
> >> -	struct auxiliary_device *adev __free(kfree) = NULL;
> >> -	int ret;
> >> +	struct auxiliary_device *adev;
> >>  
> >>  	if (!of_property_present(dev->of_node, "#reset-cells"))
> >>  		return 0;
> >>  
> >> -	adev = kzalloc(sizeof(*adev), GFP_KERNEL);
> >> -	if (!adev)
> >> -		return -ENOMEM;
> >> -
> >> -	adev->name = "reset";
> >> -	adev->dev.parent = dev;
> >> -	adev->dev.release = clk_imx8mp_audiomix_reset_adev_release;
> >> -
> >> -	ret = auxiliary_device_init(adev);
> >> -	if (ret)
> >> -		return ret;
> >> -
> >> -	ret = auxiliary_device_add(adev);
> >> -	if (ret) {
> >> -		auxiliary_device_uninit(adev);
> >> -		return ret;
> >> -	}
> >> -
> >> -	return devm_add_action_or_reset(dev, clk_imx8mp_audiomix_reset_unregister_adev,
> >> -					no_free_ptr(adev));
> >> -}
> >> -
> >> -#else /* !CONFIG_RESET_CONTROLLER */
> >> +	adev = devm_auxiliary_device_create(dev, "reset", NULL, 0);
> >> +	if (IS_ERR_OR_NULL(adev))
> >> +		return PTR_ERR(adev);
> >>  
> >> -static int clk_imx8mp_audiomix_reset_controller_register(struct device *dev,
> >> -							 struct clk_imx8mp_audiomix_priv *priv)
> >> -{
> >>  	return 0;
> >>  }
> >>  
> >> -#endif /* !CONFIG_RESET_CONTROLLER */
> >> -
> >>  static void clk_imx8mp_audiomix_save_restore(struct device *dev, bool save)
> >>  {
> >>  	struct clk_imx8mp_audiomix_priv *priv = dev_get_drvdata(dev);
> >> @@ -408,7 +364,7 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev)
> >>  	if (ret)
> >>  		goto err_clk_register;
> >>  
> >> -	ret = clk_imx8mp_audiomix_reset_controller_register(dev, priv);
> >> +	ret = clk_imx8mp_audiomix_reset_controller_register(dev);
> >>  	if (ret)
> >>  		goto err_clk_register;
> >>  
> >> 
> >> -- 
> >> 2.45.2
> >> 
> 
> -- 
> Jerome