netdev - Re: [PATCH 1/3] m68k: coldfire: Normalize clk API

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Date:   Tue, 12 Jun 2018 17:26:22 +1000
From:   Greg Ungerer <gerg@...ux-m68k.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Ralf Baechle <ralf@...ux-mips.org>,
        James Hogan <jhogan@...nel.org>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Jose Abreu <joabreu@...opsys.com>,
        Corentin Labbe <clabbe@...libre.com>,
        "David S . Miller" <davem@...emloft.net>
Cc:     Arnd Bergmann <arnd@...db.de>, linux-m68k@...ts.linux-m68k.org,
        linux-mips@...ux-mips.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] m68k: coldfire: Normalize clk API

Hi Geert,

On 11/06/18 18:44, Geert Uytterhoeven wrote:
> Coldfire still provides its own variant of the clk API rather than using
> the generic COMMON_CLK API.  This generally works, but it causes some
> link errors with drivers using the clk_round_rate(), clk_set_rate(),
> clk_set_parent(), or clk_get_parent() functions when a platform lacks
> those interfaces.
> 
> This adds empty stub implementations for each of them, and I don't even
> try to do something useful here but instead just print a WARN() message
> to make it obvious what is going on if they ever end up being called.
> 
> The drivers that call these won't be used on these platforms (otherwise
> we'd get a link error today), so the added code is harmless bloat and
> will warn about accidental use.
> 
> Based on commit bd7fefe1f06ca6cc ("ARM: w90x900: normalize clk API").
> 
> Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>

I am fine with this for ColdFire, so

Acked-by: Greg Ungerer <gerg@...ux-m68k.org>

Are you going to take this/these via your m68k git tree?

Regards
Greg


> ---
>   arch/m68k/coldfire/clk.c | 29 +++++++++++++++++++++++++++++
>   1 file changed, 29 insertions(+)
> 
> diff --git a/arch/m68k/coldfire/clk.c b/arch/m68k/coldfire/clk.c
> index 849cd208e2ed99e6..7bc666e482ebe82f 100644
> --- a/arch/m68k/coldfire/clk.c
> +++ b/arch/m68k/coldfire/clk.c
> @@ -129,4 +129,33 @@ unsigned long clk_get_rate(struct clk *clk)
>   }
>   EXPORT_SYMBOL(clk_get_rate);
>   
> +/* dummy functions, should not be called */
> +long clk_round_rate(struct clk *clk, unsigned long rate)
> +{
> +	WARN_ON(clk);
> +	return 0;
> +}
> +EXPORT_SYMBOL(clk_round_rate);
> +
> +int clk_set_rate(struct clk *clk, unsigned long rate)
> +{
> +	WARN_ON(clk);
> +	return 0;
> +}
> +EXPORT_SYMBOL(clk_set_rate);
> +
> +int clk_set_parent(struct clk *clk, struct clk *parent)
> +{
> +	WARN_ON(clk);
> +	return 0;
> +}
> +EXPORT_SYMBOL(clk_set_parent);
> +
> +struct clk *clk_get_parent(struct clk *clk)
> +{
> +	WARN_ON(clk);
> +	return NULL;
> +}
> +EXPORT_SYMBOL(clk_get_parent);
> +
>   /***************************************************************************/
>