[U-Boot] [PATCH v3 1/5] dm: clk: add stub for clk_disable_bulk when CONFIG_CLK is desactivated

[Patrick DELAUNAY <patrick.delaunay@st.com>]

Hi Jean-Jacques,


> From: Jean-Jacques Hiblot <jjhiblot@ti.com>
> Sent: mardi 12 novembre 2019 11:17
> 
> Hi Patrick,
> 
> On 12/11/2019 10:42, Patrick Delaunay wrote:
> > Add stub for clk_disable_bulk() when CONFIG_CLK is desactivated.
> >
> > That avoid compilation issue (undefined reference to
> > `clk_disable_bulk') for code:
> >
> > clk_disable_bulk(&priv->clks);
> > clk_release_bulk(&priv->clks);
> >
> > Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
> > ---
> >
> > Changes in v3:
> > - Add stub for clk_disable_bulk
> >
> > Changes in v2: None
> >
> >   include/clk.h | 4 ++++
> >   1 file changed, 4 insertions(+)
> >
> > diff --git a/include/clk.h b/include/clk.h index
> > a5ee53d94a..6f0b0fe4bc 100644
> > --- a/include/clk.h
> > +++ b/include/clk.h
> > @@ -379,7 +379,11 @@ int clk_disable(struct clk *clk);
> >    *		by clk_get_bulk().
> >    * @return zero on success, or -ve error code.
> >    */
> > + #if CONFIG_IS_ENABLED(CLK)
> >   int clk_disable_bulk(struct clk_bulk *bulk);
> > +#else
> > +inline int clk_disable_bulk(struct clk_bulk *bulk) { return 0; }
> > +#endif
> 
> Maybe this could be done for all clk operations ?

I think about, but after reflection

1/ stub already exist for :
clk_get_by_index
clk_get_bulk
clk_get_by_name
clk_release_all

=> just inline , return -ENOSYS

2/ clk_release_bulk inline call for clk_release_all

3/ other function (clk_request, clk_free, clk_get_rate, clk_enable, clk_disable) 
    should be not used as "clk" parameter is never valid / available if CONFIG_CLK is not activited

4/ the only remaining case is 

	int clk_disable_bulk(struct clk_bulk *bulk);

	=> clk_get_bulk return -ENOSYS but normally this information is not keept by caller....

	On error bulk.count = 0, and for me clk_disable_bulk(bulk wthou count = 0) is valid even if CONFIG_CLK is disable....

So I decide to limit the patch to this function to minimize the impacts
also because the 2020.01 windows is closed.

Moreover  I have not board to test CONFIG_CLK disabled.

But I agree : it is more clear a have a stub for other function which can be used 
	including clk_valid

=> I can propose a 2nd separate patch with this proposal if it is required.

> JJ

Regards 
Patrick