linux-kernel - Re: [PATCH 1/5] media: rc: update sunxi-ir driver to get base clock frequency from devicetree

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Message-id: <20171218024444.GA9140@gangnam.samsung>
Date:   Mon, 18 Dec 2017 11:44:44 +0900
From:   Andi Shyti <andi.shyti@...sung.com>
To:     Philipp Rossak <embed3d@...il.com>
Cc:     mchehab@...nel.org, robh+dt@...nel.org, mark.rutland@....com,
        maxime.ripard@...e-electrons.com, wens@...e.org,
        linux@...linux.org.uk, sean@...s.org, p.zabel@...gutronix.de,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [PATCH 1/5] media: rc: update sunxi-ir driver to get base clock
 frequency from devicetree

Hi Philipp,

just a couple of small nitpicks.

> +	u32 b_clk_freq;

[...]

> +	/* Base clock frequency (optional) */
> +	if (of_property_read_u32(dn, "clock-frequency", &b_clk_freq)) {
> +		b_clk_freq = SUNXI_IR_BASE_CLK;
> +	}
> +

how about you intialize 'b_clk_freq' to 'SUNXI_IR_BASE_CLK' and
just call 'of_property_read_u32' without if statement.
'b_clk_freq' value should not be changed if "clock-frequency"
is not present in the DTS.

This might avoid misinterpretation from static analyzers that
might think that 'b_clk_freq' is used uninitialized.

> +	dev_info(dev, "set base clock frequency to %d Hz.\n", b_clk_freq);

Please use dev_dbg().

Andi