[PATCH 02/11] ARM: OMAP3: clock: add API to enable/disable autoidle for a single clock

[Paul Walmsley]

On Fri, 11 Oct 2013, Tero Kristo wrote:

> Some drivers require direct access to the autoidle functionality of the
> interface clocks. Added clock APIs for these, so that the drivers do not
> need to access CM registers directly.
> 
> Signed-off-by: Tero Kristo <t-kristo at ti.com>

Thanks, queued.  Please coordinate with Mike to get 
allow_idle/deny_idle-type interfaces into the Common Clock Framework, so 
these can be replaced with standard CCF-type allow_idle() & deny_idle() 
functions.  That interface should include use-counting so multiple callers 
can use allow_idle() and deny_idle() without stomping on each other.


- Paul

> ---
>  arch/arm/mach-omap2/clock.c |   38 ++++++++++++++++++++++++++++++++++++++
>  arch/arm/mach-omap2/clock.h |    2 ++
>  2 files changed, 40 insertions(+)
> 
> diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c
> index 0c38ca9..c7c5d31 100644
> --- a/arch/arm/mach-omap2/clock.c
> +++ b/arch/arm/mach-omap2/clock.c
> @@ -543,6 +543,44 @@ int omap2_clk_disable_autoidle_all(void)
>  }
>  
>  /**
> + * omap2_clk_deny_idle - disable autoidle on an OMAP clock
> + * @clk: struct clk * to disable autoidle for
> + *
> + * Disable autoidle on an OMAP clock.
> + */
> +int omap2_clk_deny_idle(struct clk *clk)
> +{
> +	struct clk_hw_omap *c;
> +
> +	if (__clk_get_flags(clk) & CLK_IS_BASIC)
> +		return -EINVAL;
> +
> +	c = to_clk_hw_omap(__clk_get_hw(clk));
> +	if (c->ops && c->ops->deny_idle)
> +		c->ops->deny_idle(c);
> +	return 0;
> +}
> +
> +/**
> + * omap2_clk_allow_idle - enable autoidle on an OMAP clock
> + * @clk: struct clk * to enable autoidle for
> + *
> + * Enable autoidle on an OMAP clock.
> + */
> +int omap2_clk_allow_idle(struct clk *clk)
> +{
> +	struct clk_hw_omap *c;
> +
> +	if (__clk_get_flags(clk) & CLK_IS_BASIC)
> +		return -EINVAL;
> +
> +	c = to_clk_hw_omap(__clk_get_hw(clk));
> +	if (c->ops && c->ops->allow_idle)
> +		c->ops->allow_idle(c);
> +	return 0;
> +}
> +
> +/**
>   * omap2_clk_enable_init_clocks - prepare & enable a list of clocks
>   * @clk_names: ptr to an array of strings of clock names to enable
>   * @num_clocks: number of clock names in @clk_names
> diff --git a/arch/arm/mach-omap2/clock.h b/arch/arm/mach-omap2/clock.h
> index 7aa32cd..82916cc 100644
> --- a/arch/arm/mach-omap2/clock.h
> +++ b/arch/arm/mach-omap2/clock.h
> @@ -411,6 +411,8 @@ void omap2_clk_dflt_find_idlest(struct clk_hw_omap *clk,
>  void omap2_init_clk_hw_omap_clocks(struct clk *clk);
>  int omap2_clk_enable_autoidle_all(void);
>  int omap2_clk_disable_autoidle_all(void);
> +int omap2_clk_allow_idle(struct clk *clk);
> +int omap2_clk_deny_idle(struct clk *clk);
>  void omap2_clk_enable_init_clocks(const char **clk_names, u8 num_clocks);
>  int omap2_clk_switch_mpurate_at_boot(const char *mpurate_ck_name);
>  void omap2_clk_print_new_rates(const char *hfclkin_ck_name,
> -- 
> 1.7.9.5
> 


- Paul