[PATCH v4 1/4] fu540: prci: add request and free clock handlers

[Sagar Kadam]

Hi Bin,

> -----Original Message-----
> From: Bin Meng <bmeng.cn at gmail.com>
> Sent: Wednesday, June 24, 2020 6:50 AM
> To: Sagar Kadam <sagar.kadam at sifive.com>
> Cc: U-Boot Mailing List <u-boot at lists.denx.de>; Rick Chen
> <rick at andestech.com>; Lukasz Majewski <lukma at denx.de>; Jagan Teki
> <jagan at amarulasolutions.com>; Pragnesh Patel
> <pragnesh.patel at sifive.com>; Anup Patel <anup.patel at wdc.com>; Simon
> Glass <sjg at chromium.org>; Sean Anderson <seanga2 at gmail.com>
> Subject: Re: [PATCH v4 1/4] fu540: prci: add request and free clock handlers
> 
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> 
> Hi Sagar,
> 
> On Sun, Jun 21, 2020 at 9:10 PM Sagar Shrikant Kadam
> <sagar.kadam at sifive.com> wrote:
> >
> > Add clk_request handler to check if a valid clock is requested.
> > Here clk_free handler is added for debug purpose which will display
> > details of clock passed to clk_free.
> >
> > Signed-off-by: Sagar Shrikant Kadam <sagar.kadam at sifive.com>
> > Reviewed-by: Pragnesh Patel <Pragnesh.patel at sifive.com>
> > ---
> >  drivers/clk/sifive/fu540-prci.c | 21 +++++++++++++++++++++
> >  1 file changed, 21 insertions(+)
> >
> > diff --git a/drivers/clk/sifive/fu540-prci.c
> > b/drivers/clk/sifive/fu540-prci.c index fe6e0d4..9a9ff6b 100644
> > --- a/drivers/clk/sifive/fu540-prci.c
> > +++ b/drivers/clk/sifive/fu540-prci.c
> > @@ -686,6 +686,25 @@ static ulong sifive_fu540_prci_set_rate(struct clk
> *clk, ulong rate)
> >         return rate;
> >  }
> >
> > +static int sifive_fu540_prci_clk_request(struct clk *clk) {
> > +       debug("%s(clk=%p) (dev=%p, id=%lu)\n", __func__, clk, clk->dev,
> > +             clk->id);
> > +
> > +       if (clk->id >= ARRAY_SIZE(__prci_init_clocks))
> > +               return -EINVAL;
> > +
> > +       return 0;
> > +}
> > +
> > +static int sifive_fu540_prci_clk_free(struct clk *clk) {
> > +       debug("%s(clk=%p) (dev=%p, id=%lu)\n", __func__, clk, clk->dev,
> > +             clk->id);
> > +
> > +       return 0;
> > +}
> 
> It seems these 2 routines do not actually do anything? Is this for debugging
> purposes?
> 
The sifive_fu540_prci_clk_request will check if the clock requested is valid or not.
While the sifive_fu540_prci_clk_free function is just for debug.
Is it ok if I retain these in V5 or you have some other thought here.

Thanks & BR,
Sagar

> Regards,
> Bin