linux-kernel - Re: [PATCH] clk: gpio: Get parent clk names already in of_gpio_clk

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Message-ID: <20151118221903.GF32672@codeaurora.org>
Date:	Wed, 18 Nov 2015 14:19:03 -0800
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Jyri Sarha <jsarha@...com>
Cc:	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
	Mike Turquette <mturquette@...libre.com>,
	tomi.valkeinen@...com, Sergej Sawazki <ce3a@....de>
Subject: Re: [PATCH] clk: gpio: Get parent clk names already in
 of_gpio_clk_setup()

On 11/17, Jyri Sarha wrote:
> Get parent clk names already in of_gpio_clk_setup() and store the
> names in struct clk_gpio_delayed_register_data. of_clk_get_parent_name()
> can not be called in struct of_clk_provider's get() callback since it
> may make a recursive call to of_clk_get_from_provider() and this in turn
> tries to recursively lock of_clk_mutex.
> 
> Signed-off-by: Jyri Sarha <jsarha@...com>
> Cc: Sergej Sawazki <ce3a@....de>
> ---
> Something has changed in Linux mainline so that getting the clk
> parent names in struct of_clk_provider's get() callback does not work
> anymore. This patch should fix the problem.

Something would be commit 0a4807c2f9a4 (clk: Make
of_clk_get_parent_name() robust with #clock-cells = 1, 2015-10-14)?

The patch looks good. Given that there's one user of this code in
mainline I'll push this as a fix for v4.4.

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