linux-kernel - Re: [PATCH] clk: rockchip: use separate compatibles for rk3288w-cru

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Date:   Fri, 03 Jul 2020 12:38:47 -0300
From:   Ezequiel Garcia <ezequiel@...labora.com>
To:     Heiko Stuebner <heiko@...ech.de>,
        linux-rockchip@...ts.infradead.org
Cc:     mylene.josserand@...labora.com, mturquette@...libre.com,
        sboyd@...nel.org, jagan@...rulasolutions.com,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        Heiko Stuebner <heiko.stuebner@...obroma-systems.com>
Subject: Re: [PATCH] clk: rockchip: use separate compatibles for rk3288w-cru

On Fri, 2020-07-03 at 17:28 +0200, Heiko Stuebner wrote:
> From: Heiko Stuebner <heiko.stuebner@...obroma-systems.com>
> 
> Commit 1627f683636d ("clk: rockchip: Handle clock tree for rk3288w variant")
> added the check for rk3288w-specific clock-tree changes but in turn would
> require a double-compatible due to re-using the main rockchip,rk3288-cru
> compatible as entry point.
> 
> The binding change actually describes the compatibles as one or the other
> so adapt the code accordingly and add a real second entry-point for the
> clock controller.
> 
> Signed-off-by: Heiko Stuebner <heiko.stuebner@...obroma-systems.com>
> ---
>  drivers/clk/rockchip/clk-rk3288.c | 15 +++++++++++++--
>  1 file changed, 13 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/clk/rockchip/clk-rk3288.c b/drivers/clk/rockchip/clk-rk3288.c
> index 204976e2d0cb..a39ca9809cc3 100644
> --- a/drivers/clk/rockchip/clk-rk3288.c
> +++ b/drivers/clk/rockchip/clk-rk3288.c
> @@ -922,7 +922,7 @@ static struct syscore_ops rk3288_clk_syscore_ops = {
>  	.resume = rk3288_clk_resume,
>  };
>  
> -static void __init rk3288_clk_init(struct device_node *np)
> +static void __init rk3288_common_init(struct device_node *np, bool is_w)

>From an API standpoint, avoid boolean arguments
in favor of a simple enum.

This case is trivial, but I think it's useful to avoid
the anti pattern.

Thanks for quickly working on this :)

Ezequiel 

>  {
>  	struct rockchip_clk_provider *ctx;
>  
> @@ -945,7 +945,7 @@ static void __init rk3288_clk_init(struct device_node *np)
>  	rockchip_clk_register_branches(ctx, rk3288_clk_branches,
>  				  ARRAY_SIZE(rk3288_clk_branches));
>  
> -	if (of_device_is_compatible(np, "rockchip,rk3288w-cru"))
> +	if (is_w)
>  		rockchip_clk_register_branches(ctx, rk3288w_hclkvio_branch,
>  					       ARRAY_SIZE(rk3288w_hclkvio_branch));
>  	else
> @@ -970,4 +970,15 @@ static void __init rk3288_clk_init(struct device_node *np)
>  
>  	rockchip_clk_of_add_provider(np, ctx);
>  }
> +
> +static void __init rk3288_clk_init(struct device_node *np)
> +{
> +	rk3288_common_init(np, false);
> +}
>  CLK_OF_DECLARE(rk3288_cru, "rockchip,rk3288-cru", rk3288_clk_init);
> +
> +static void __init rk3288w_clk_init(struct device_node *np)
> +{
> +	rk3288_common_init(np, true);
> +}
> +CLK_OF_DECLARE(rk3288w_cru, "rockchip,rk3288w-cru", rk3288w_clk_init);