Re: [PATCH] clk: fix link error for rcar-gen2

[Geert Uytterhoeven]

Hi Simon,

On Mon, Oct 31, 2016 at 10:52 AM, Simon Horman <horms@xxxxxxxxxxxx> wrote:
> From: Simon Horman <horms+renesas@xxxxxxxxxxxx>
> Subject: [PATCH] ARM: shmobile: only call rcar_gen2_clocks_init() if present
>
> The RZ/G1M (r8a7743) uses the R-Car Gen2 core, but not the R-Car Gen2 clock
> driver. This is a harbinger of a transition for R-Car Gen2 SoCs. As the
> process to get all the required pieces in place is somewhat complex it
> seems useful to try to disentangle dependencies where possible.
>
> The approach here is to temporarily disable calling rcar_gen2_clocks_init()
> if no R-Car Gen2 SoC are configured and thus the symbol will not be
> present.
>
> Fixes: 1254f607fc3d ("ARM: shmobile: r8a7743: basic SoC support")
> Signed-off-by: Simon Horman <horms+renesas@xxxxxxxxxxxx>
> ---
>
> The current likely path to removing need for this is for
> "[PATCH v4 00/23] soc: renesas: Add R-Car RST driver for obtaining mode
> pin state" to be accepted. In particular patch 20 removes the call to
> rcar_gen2_clocks_init() in rcar_gen2_timer_init().
> ---
>  arch/arm/mach-shmobile/setup-rcar-gen2.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/mach-shmobile/setup-rcar-gen2.c b/arch/arm/mach-shmobile/setup-rcar-gen2.c
> index 875bcb8c1026..657262556dc4 100644
> --- a/arch/arm/mach-shmobile/setup-rcar-gen2.c
> +++ b/arch/arm/mach-shmobile/setup-rcar-gen2.c
> @@ -131,7 +131,13 @@ void __init rcar_gen2_timer_init(void)
>         iounmap(base);
>  #endif /* CONFIG_ARM_ARCH_TIMER */
>
> -       rcar_gen2_clocks_init(mode);
> +       if (IS_ENABLED(CONFIG_ARCH_R8A7790) ||
> +           IS_ENABLED(CONFIG_ARCH_R8A7791) ||
> +           IS_ENABLED(CONFIG_ARCH_R8A7792) ||
> +           IS_ENABLED(CONFIG_ARCH_R8A7793) ||
> +           IS_ENABLED(CONFIG_ARCH_R8A7794))
> +               rcar_gen2_clocks_init(mode);

Upon second thought (triggered bySergei conflict notification), this needs
an else clause:

        else
                of_clk_init(NULL);

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds