Return checks for clock calls

[Fabio Estevam]

Hi Abel,

On Fri, Mar 23, 2018 at 6:49 AM, Abel Vesa <abel.vesa at nxp.com> wrote:
> Hi Shawn, Fabio,
>
> I'm trying to get the imx clks changes upstreamed. To that end, I reached this
> old commit that adds some wrappers over the generic clk API. Here is the commit
> message:
>
>         ARM: imx6: add return check for clock calls
>
>         There are a bunch of clk_enable_prepare, clk_set_parent and clk_set_rate
>         calls in imx6 clock driver's initialization.  They are called without
>         retunr check.  If there is something going wrong with the calls, they
>         will just fail silently.
>
>         The patch creates a set of helper functions imx_clk_enable_prepare,
>         imx_clk_set_parent and imx_clk_set_rate, and use them instead from clock
>         initialization to check the return and print error message to tell
>         failures if any.
>
>         Signed-off-by: Shawn Guo <shawn.guo at freescale.com>
>
> And it adds the imx_clk_set_parent, imx_clk_prepare_enable and
> imx_clk_set_rate which basically just print an error message if the generic
> functions have failed.
>
> The only plus of these wrappers is that we at least see that the generic
> functions have failed, but the behaviour is not changed in any way.
>
> Question is, do we want this upstreamed considering that we need to replace the
> calls throughout all the older imx socs ?

IMHO we should not introduce these new helper functions.

We can simply explicitly check for errors with the existing clock
functions when needed.