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SubjectRe: [RFC 7/8] arm/clkdev: lookup clocks from OF clock providers
On 11/08/2011 07:19 PM, Grant Likely wrote:
> From: Jeremy Kerr <jeremy.kerr@canonical.com>
>
> Hook the OF clock provider infrastructure to clk_get.
>
> Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
> ---
> drivers/clk/clkdev.c | 7 +++++++
> 1 files changed, 7 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c
> index 6db161f..63f81c9 100644
> --- a/drivers/clk/clkdev.c
> +++ b/drivers/clk/clkdev.c
> @@ -19,6 +19,8 @@
> #include <linux/mutex.h>
> #include <linux/clk.h>
> #include <linux/clkdev.h>
> +#include <linux/of.h>
> +#include <linux/of_clk.h>
>
> static LIST_HEAD(clocks);
> static DEFINE_MUTEX(clocks_mutex);
> @@ -78,6 +80,11 @@ EXPORT_SYMBOL(clk_get_sys);
> struct clk *clk_get(struct device *dev, const char *con_id)
> {
> const char *dev_id = dev ? dev_name(dev) : NULL;
> + struct clk *clk;
> +

Need NULL check for dev (and then init clk to NULL):

if (dev && dev->of_node)
> + clk = of_clk_get_by_name(dev->of_node, con_id);

> + if (clk && __clk_get(clk))
> + return clk;
>
> return clk_get_sys(dev_id, con_id);
> }



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