On Sat, Mar 19, 2011 at 02:24:29AM +0800, Shawn Guo wrote:
> This pointer to 'struct clk' is added to save the reference to 'clk'
> which is dynamically created per dt clock node, so that clkdev API
> like clk_get can work with dt based device driver.
>
> Signed-off-by: Shawn Guo <shawn....@linaro.org>
> ---
> include/linux/of.h | 1 +
> 1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/include/linux/of.h b/include/linux/of.h
> index d9dd664..e621295 100644
> --- a/include/linux/of.h
> +++ b/include/linux/of.h
> @@ -54,6 +54,7 @@ struct device_node {
> struct device_node *allnext; /* next in list of all nodes */
> struct proc_dir_entry *pde; /* this node's proc directory */
> struct kref kref;
> + struct clk *clk;
The dt clock support code can already translate from dt node to a
clock provider, and each clock provider should provide a .get() hook
to return the correct struct clk. of_clk_add_provider() inserts a
mapping into the of_clk_providers() list, and clk_get() calls
of_clk_get() which will process a devicenode->clk provider mapping.
Adding a struct clk pointer to the device node isn't sufficient since
a single clock provider node can provide multiple clock outputs.
g.
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