From mboxrd@z Thu Jan  1 00:00:00 1970
From: Arnd Bergmann <arnd@arndb.de>
Subject: Re: [PATCH 0/3] Legacy clock drivers: Normalize clk API
Date: Mon, 11 Jun 2018 11:02:52 +0200
Message-ID: <CAK8P3a0CJmpf0L-OXDmqP=kRLGCokR=v6jUPaCSpnFuCwHa7WA@mail.gmail.com>
References: <1528706663-20670-1-git-send-email-geert@linux-m68k.org>
Mime-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Cc: Greg Ungerer <gerg@linux-m68k.org>,
        Ralf Baechle <ralf@linux-mips.org>,
        James Hogan <jhogan@kernel.org>,
        Giuseppe Cavallaro <peppe.cavallaro@st.com>,
        Alexandre Torgue <alexandre.torgue@st.com>,
        Jose Abreu <joabreu@synopsys.com>,
        Corentin Labbe <clabbe@baylibre.com>,
        "David S . Miller" <davem@davemloft.net>,
        linux-m68k <linux-m68k@lists.linux-m68k.org>,
        "open list:RALINK MIPS ARCHITECTURE" <linux-mips@linux-mips.org>,
        Networking <netdev@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Return-path: <linux-kernel-owner@vger.kernel.org>
In-Reply-To: <1528706663-20670-1-git-send-email-geert@linux-m68k.org>
Sender: linux-kernel-owner@vger.kernel.org
List-Id: netdev.vger.kernel.org

On Mon, Jun 11, 2018 at 10:44 AM, Geert Uytterhoeven
<geert@linux-m68k.org> wrote:
>         Hi all,
>
> When seeing commit bde4975310eb1982 ("net: stmmac: fix build failure due
> to missing COMMON_CLK dependency"), I wondered why this dependency is
> needed, as all implementations of the clock API should implement all
> required functionality, or provide dummies.
>
> It turns out there were still two implementations that lacked the
> clk_set_rate() function: Coldfire and AR7.
>
> This series contains three patches:
>   - The first two patches add dummies for clk_set_rate(),
>     clk_set_rate(), clk_set_parent(), and clk_get_parent() to the
>     Coldfire and AR7, like Arnd has done for other legacy clock
>     implementations a while ago.
>   - The second patch removes the COMMON_CLK dependency from the stmmac
>     network drivers again, as it is no longer needed.
>     Obviously this patch has a hard dependency on the first two patches.

Yes, good idea.

Acked-by: Arnd Bergmann <arnd@arnd.de>

One question: what happens on machines that don't support any CLK
interface, i.e.
that don't have any of COMMON_CLK/HAVE_CLK/CLKDEV_LOOKUP?

I guess those are already hopelessly broken for many drivers, right?

         Arnd