Re: [PATCH v5 3/5] media: i2c: ov5645: Turn probe error into warning for xvclk frequency mismatch

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Cc: Sakari Ailus <sakari.ailus@linux.intel.com>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Fabio Estevam <festevam@gmail.com>,
	NXP Linux Team <linux-imx@nxp.com>,
	Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	linux-media@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Lad Prabhakar <prabhakar.csengg@gmail.com>
Subject: Re: [PATCH v5 3/5] media: i2c: ov5645: Turn probe error into warning for xvclk frequency mismatch
Date: Mon, 6 Apr 2020 20:35:03 +0300	[thread overview]
Message-ID: <20200406173503.GF16885@pendragon.ideasonboard.com> (raw)
In-Reply-To: <1586191361-16598-4-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com>

Hi Prabhakar,

Thank you for the patch.

On Mon, Apr 06, 2020 at 05:42:39PM +0100, Lad Prabhakar wrote:
> PLL's on platforms might not be so accurate enough to generate the
> required clock frequency, so instead of erroring out on xvlck frequency
> mismatch just warn the user and continue ahead in probe.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
>  drivers/media/i2c/ov5645.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/media/i2c/ov5645.c b/drivers/media/i2c/ov5645.c
> index 52848fff8a08..314760349adf 100644
> --- a/drivers/media/i2c/ov5645.c
> +++ b/drivers/media/i2c/ov5645.c
> @@ -1103,11 +1103,8 @@ static int ov5645_probe(struct i2c_client *client)
>  	}
>  	/* external clock must be 24MHz, allow 1% tolerance */
>  	xclk_freq = clk_get_rate(ov5645->xclk);
> -	if (xclk_freq < 23760000 || xclk_freq > 24240000) {
> -		dev_err(dev, "external clock frequency %u is not supported\n",
> -			xclk_freq);
> -		return -EINVAL;
> -	}
> +	if (xclk_freq < 23760000 || xclk_freq > 24240000)
> +		dev_warn(dev, "xvclk mismatched, modes are based on 24MHz\n");
>  
>  	for (i = 0; i < OV5645_NUM_SUPPLIES; i++)
>  		ov5645->supplies[i].supply = ov5645_supply_name[i];

-- 
Regards,

Laurent Pinchart