linux-kernel - Re: [PATCH] clk-rcar-gen2: RCAN clock support

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Message-ID: <5499F3D4.6040302@cogentembedded.com>
Date:	Wed, 24 Dec 2014 01:59:32 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	mturquette@...aro.org, linux-kernel@...r.kernel.org
CC:	linux-sh@...r.kernel.org, vksavl@...il.com
Subject: Re: [PATCH] clk-rcar-gen2: RCAN clock support

Hello.

On 07/31/2014 12:23 AM, Sergei Shtylyov wrote:

> Add RCAN clock support to the R-Car generation 2 CPG driver. This clock gets
> derived from the USB_EXTAL clock by dividing it by 6. The layout of RCANCKCR
> register is close to those of the clocks supported by the 'clk-div6'  driver
> but has no divider field, and so can't be supported by that driver...

> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>

> ---
> The patch is against the 'clk-next' branch of Mike Turquette's 'linux.git' repo.
>
>   drivers/clk/shmobile/clk-rcar-gen2.c |   99 +++++++++++++++++++++++++++++++++++
>   1 file changed, 99 insertions(+)

> Index: linux/drivers/clk/shmobile/clk-rcar-gen2.c
> ===================================================================
> --- linux.orig/drivers/clk/shmobile/clk-rcar-gen2.c
> +++ linux/drivers/clk/shmobile/clk-rcar-gen2.c
[...]
> +static struct clk * __init cpg_rcan_clk_register(struct rcar_gen2_cpg *cpg,
> +						 struct device_node *np)
> +{
> +	static const char *parent_name;

    No need for this *static*...

> +	struct clk_init_data init;
> +	struct cpg_rcan_clk *rcanclk;
> +	struct clk *clk;
> +
> +	rcanclk = kzalloc(sizeof(*rcanclk), GFP_KERNEL);
> +	if (!rcanclk)
> +		return ERR_PTR(-ENOMEM);
> +
> +	parent_name = of_clk_get_parent_name(np, 1);
> +
> +	init.name = "rcan";
> +	init.ops = &cpg_rcan_clk_ops;
> +	init.parent_names = &parent_name;
> +	init.num_parents = 1;

    Ugh, forgot to clear the 'init.flags', so that it has some random value...

WBR, Sergei

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