From: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>,
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 <linux-media@vger.kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>,
LAK <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v5 2/5] media: i2c: ov5645: Drop reading clock-frequency dt-property
Date: Tue, 7 Apr 2020 08:36:19 +0100 [thread overview]
Message-ID: <CA+V-a8tmj0SDpJWPL1B3GQ6FA=fLN-4-oCj5p4L0vAZSBg29vw@mail.gmail.com> (raw)
In-Reply-To: <20200406173425.GE16885@pendragon.ideasonboard.com>
Hi Laurent,
Thank you for the review.
On Mon, Apr 6, 2020 at 6:34 PM Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
>
> Hi Prabhakar,
>
> Thank you for the patch.
>
> On Mon, Apr 06, 2020 at 05:42:38PM +0100, Lad Prabhakar wrote:
> > Modes in the driver are based on xvclk frequency fixed to 24MHz, but where
> > as the OV5645 sensor can support the xvclk frequency ranging from 6MHz to
> > 24MHz. So instead making clock-frequency as dt-property just let the
> > driver enforce the required clock frequency.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > ---
> > drivers/media/i2c/ov5645.c | 14 +++++---------
> > 1 file changed, 5 insertions(+), 9 deletions(-)
> >
> > diff --git a/drivers/media/i2c/ov5645.c b/drivers/media/i2c/ov5645.c
> > index a6c17d15d754..52848fff8a08 100644
> > --- a/drivers/media/i2c/ov5645.c
> > +++ b/drivers/media/i2c/ov5645.c
> > @@ -61,6 +61,8 @@
> > #define OV5645_SDE_SAT_U 0x5583
> > #define OV5645_SDE_SAT_V 0x5584
> >
> > +#define OV5645_XVCLK_FREQ 24000000
> > +
> > /* regulator supplies */
> > static const char * const ov5645_supply_name[] = {
> > "vdddo", /* Digital I/O (1.8V) supply */
> > @@ -1094,25 +1096,19 @@ static int ov5645_probe(struct i2c_client *client)
> > return PTR_ERR(ov5645->xclk);
> > }
> >
> > - ret = of_property_read_u32(dev->of_node, "clock-frequency", &xclk_freq);
> > + ret = clk_set_rate(ov5645->xclk, OV5645_XVCLK_FREQ);
> > if (ret) {
> > - dev_err(dev, "could not get xclk frequency\n");
> > + dev_err(dev, "could not set xclk frequency\n");
> > return ret;
> > }
> > -
>
> I think you can keep the blank line here.
>
Oops my bad will drop that in next version.
Cheers,
--Prabhakar
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
>
> > /* 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;
> > }
> >
> > - ret = clk_set_rate(ov5645->xclk, xclk_freq);
> > - if (ret) {
> > - dev_err(dev, "could not set xclk frequency\n");
> > - return ret;
> > - }
> > -
> > for (i = 0; i < OV5645_NUM_SUPPLIES; i++)
> > ov5645->supplies[i].supply = ov5645_supply_name[i];
> >
>
> --
> Regards,
>
> Laurent Pinchart
next prev parent reply other threads:[~2020-04-07 7:36 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-06 16:42 [PATCH v5 0/5] ov5645: Deprecate usage of the clock-frequency Lad Prabhakar
2020-04-06 16:42 ` [PATCH v5 1/5] media: dt-bindings: media: i2c: Deprecate usage of the clock-frequency property Lad Prabhakar
2020-04-06 17:30 ` Laurent Pinchart
2020-04-07 7:35 ` Lad, Prabhakar
2020-04-07 7:14 ` Geert Uytterhoeven
2020-04-14 13:55 ` Rob Herring
2020-04-06 16:42 ` [PATCH v5 2/5] media: i2c: ov5645: Drop reading clock-frequency dt-property Lad Prabhakar
2020-04-06 16:51 ` Sakari Ailus
2020-04-06 17:11 ` Lad, Prabhakar
2020-04-06 17:32 ` Laurent Pinchart
2020-04-07 6:22 ` Sakari Ailus
2020-04-07 12:21 ` Laurent Pinchart
2020-04-07 15:14 ` Sakari Ailus
2020-04-14 20:55 ` Laurent Pinchart
2020-04-14 20:56 ` Laurent Pinchart
2020-04-15 8:19 ` Maxime Ripard
2020-04-15 16:27 ` Sakari Ailus
2020-04-17 2:09 ` Laurent Pinchart
2020-04-06 17:34 ` Laurent Pinchart
2020-04-07 7:36 ` Lad, Prabhakar [this message]
2020-04-07 7:16 ` Geert Uytterhoeven
2020-04-07 7:40 ` Lad, Prabhakar
2020-04-07 12:18 ` Laurent Pinchart
2020-04-06 16:42 ` [PATCH v5 3/5] media: i2c: ov5645: Turn probe error into warning for xvclk frequency mismatch Lad Prabhakar
2020-04-06 17:35 ` Laurent Pinchart
2020-04-07 7:19 ` Geert Uytterhoeven
2020-04-07 7:43 ` Lad, Prabhakar
2020-04-06 16:42 ` [PATCH v5 4/5] ARM: dts: imx6qdl-wandboard: Drop clock-frequency property from ov5645 node Lad Prabhakar
2020-04-06 17:36 ` Laurent Pinchart
2020-04-06 16:42 ` [PATCH v5 5/5] media: dt-bindings: media: i2c: convert ov5645 bindings to json-schema Lad Prabhakar
2020-04-06 17:43 ` Laurent Pinchart
2020-04-07 7:46 ` Lad, Prabhakar
2020-04-15 14:43 ` Rob Herring
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