linux-kernel - Re: [RFC PATCH 2/2] of/clk: use "clkops-clocks" to specify clocks handled by clock

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Date:	Mon, 28 Jul 2014 08:05:33 -0600
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Grygorii Strashko <grygorii.strashko@...com>,
	geert+renesas@...der.be
Cc:	laurent.pinchart@...asonboard.com, ulf.hansson@...aro.org,
	khilman@...aro.org, mturquette@...aro.org, tomasz.figa@...il.com,
	ben.dooks@...ethink.co.uk, horms@...ge.net.au,
	magnus.damm@...il.com, rjw@...ysocki.net, linux-sh@...r.kernel.org,
	linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Grygorii Strashko <grygorii.strashko@...com>
Subject: Re: [RFC PATCH 2/2] of/clk: use "clkops-clocks" to specify clocks
 handled by clock_ops domain

On Thu, 12 Jun 2014 19:53:43 +0300, Grygorii Strashko <grygorii.strashko@...com> wrote:
> Use "clkops-clocks" property to specify clocks handled by
> clock_ops domain PM domain. Only clocks defined in "clkops-clocks"
> set of clocks will be handled by Runtime PM through clock_ops
> Pm domain.
> 
> Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
> ---
>  drivers/of/of_clk.c |    7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/of/of_clk.c b/drivers/of/of_clk.c
> index 35f5e9f..5f9b90e 100644
> --- a/drivers/of/of_clk.c
> +++ b/drivers/of/of_clk.c
> @@ -86,11 +86,8 @@ int of_clk_register_runtime_pm_clocks(struct device_node *np,
>  	struct clk *clk;
>  	int error;
>  
> -	for (i = 0; (clk = of_clk_get(np, i)) && !IS_ERR(clk); i++) {
> -		if (!clk_may_runtime_pm(clk)) {
> -			clk_put(clk);
> -			continue;
> -		}
> +	for (i = 0; (clk = of_clk_get_from_set(np, "clkops", i)) &&
> +		     !IS_ERR(clk); i++) {

This really looks like an ABI break to me. What happens to all the
existing platforms who don't have this new clkops-clocks in their device
tree?

g.
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