linux-kernel - Re: [RESEND (again) PATCH] clkdev: don't call __of_clk_get_by_name() unnecessarily from clk

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Message-ID: <5824a382-00fc-0af3-097f-519a36c2d555@lechnology.com>
Date:   Mon, 25 Jun 2018 18:02:24 -0500
From:   David Lechner <david@...hnology.com>
To:     Bartosz Golaszewski <brgl@...ev.pl>,
        Russell King <linux@...linux.org.uk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Sekhar Nori <nsekhar@...com>,
        Kevin Hilman <khilman@...libre.com>
Subject: Re: [RESEND (again) PATCH] clkdev: don't call __of_clk_get_by_name()
 unnecessarily from clk_get()

On 06/25/2018 11:04 AM, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> 
> The way this function is implemented caused some confusion when
> converting the TI DaVinci platform to using the common clock framework.
> 
> Current kernel supports booting DaVinci boards both in device tree as
> well as legacy, board-file mode. In the latter, we always end up
> calling clk_get_sys() as of_node is NULL and __of_clk_get_by_name()
> returns -ENOENT.
> 
> It was not obvious at first glance how clk_get(dev, NULL) will work in
> board-file mode since we always call __of_clk_get_by_name(). Let's make
> it clearer by checking if of_node is NULL and skipping right to
> clk_get_sys().
> 
> Cc: Sekhar Nori <nsekhar@...com>
> Cc: Kevin Hilman <khilman@...libre.com>
> Cc: David Lechner <david@...hnology.com>
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> ---

Reviewed-by: David Lechner <david@...hnology.com>