From: Robert Foss <robert.foss@linaro.org> To: Marco Felsch <m.felsch@pengutronix.de> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>, Sakari Ailus <sakari.ailus@iki.fi>, Maxime Ripard <maxime@cerno.tech>, linux-media <linux-media@vger.kernel.org>, "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" <devicetree@vger.kernel.org>, linux-kernel <linux-kernel@vger.kernel.org>, "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" <linux-arm-kernel@lists.infradead.org>, Dongchun Zhu <dongchun.zhu@mediatek.com>, Fabio Estevam <festevam@gmail.com>, Tomasz Figa <tfiga@chromium.org>, Ben Kao <ben.kao@intel.com> Subject: Re: [PATCH v7 3/3] media: ov8856: Implement sensor module revision identification Date: Wed, 6 May 2020 16:48:06 +0200 [thread overview] Message-ID: <CAG3jFyvvzk8n1+fkfS5h6TPpqMQ3sGXuJ1_yot1MKFRTcDkhnQ@mail.gmail.com> (raw) In-Reply-To: <20200505101729.GF18755@pengutronix.de> Hey Marco, On Tue, 5 May 2020 at 12:17, Marco Felsch <m.felsch@pengutronix.de> wrote: > > Hi Robert, > > On 20-05-05 12:01, Robert Foss wrote: > > Query the sensor for its module revision, and compare it > > to known revisions. > > > > Currently 2A and 1B revision indentification is supported. > > > > Signed-off-by: Robert Foss <robert.foss@linaro.org> > > --- > > > > - Changes since v3: > > * Actually add module revision 2A > > > > - Changes since v2: > > * Add module revision 2A > > * Sakari: Remove ov8856_check_revision() > > * Sakari: Stop EEPROM streaming mode > > > > drivers/media/i2c/ov8856.c | 53 ++++++++++++++++++++++++++++++++++++++ > > 1 file changed, 53 insertions(+) > > > > diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c > > index e6418a79801e..3c82c3e588d7 100644 > > --- a/drivers/media/i2c/ov8856.c > > +++ b/drivers/media/i2c/ov8856.c > > @@ -32,6 +32,19 @@ > > #define OV8856_MODE_STANDBY 0x00 > > #define OV8856_MODE_STREAMING 0x01 > > > > +/* module revisions */ > > +#define OV8856_2A_MODULE 0x01 > > +#define OV8856_1B_MODULE 0x02 > > + > > +/* the OTP read-out buffer is at 0x7000 and 0xf is the offset > > + * of the byte in the OTP that means the module revision > > + */ > > +#define OV8856_MODULE_REVISION 0x700f > > +#define OV8856_OTP_MODE_CTRL 0x3d84 > > +#define OV8856_OTP_LOAD_CTRL 0x3d81 > > +#define OV8856_OTP_MODE_AUTO 0x00 > > +#define OV8856_OTP_LOAD_CTRL_ENABLE BIT(0) > > + > > /* vertical-timings from sensor */ > > #define OV8856_REG_VTS 0x380e > > #define OV8856_VTS_MAX 0x7fff > > @@ -1152,6 +1165,46 @@ static int ov8856_identify_module(struct ov8856 *ov8856) > > return -ENXIO; > > } > > > > + ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, > > + OV8856_REG_VALUE_08BIT, OV8856_MODE_STREAMING); > > + if (ret) > > + return ret; > > + > > + ret = ov8856_write_reg(ov8856, OV8856_OTP_MODE_CTRL, > > + OV8856_REG_VALUE_08BIT, OV8856_OTP_MODE_AUTO); > > + if (ret) { > > + dev_err(&client->dev, "failed to set otp mode"); > > + return ret; > > + } > > + > > + ret = ov8856_write_reg(ov8856, OV8856_OTP_LOAD_CTRL, > > + OV8856_REG_VALUE_08BIT, > > + OV8856_OTP_LOAD_CTRL_ENABLE); > > + if (ret) { > > + dev_err(&client->dev, "failed to enable load control"); > > + return ret; > > + } > > + > > + ret = ov8856_read_reg(ov8856, OV8856_MODULE_REVISION, > > + OV8856_REG_VALUE_08BIT, &val); > > + if (ret) { > > + dev_err(&client->dev, "failed to read module revision"); > > + return ret; > > + } > > + > > + dev_info(&client->dev, "OV8856 revision %x (%s) at address 0x%02x\n", > > + val, > > + val == OV8856_2A_MODULE ? "2A" : > > + val == OV8856_1B_MODULE ? "1B" : "unknown revision", > > + client->addr); > > Pls check the alignment here too. Ack. > > Regards, > Marco > > > + > > + ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, > > + OV8856_REG_VALUE_08BIT, OV8856_MODE_STANDBY); > > + if (ret) { > > + dev_err(&client->dev, "failed to exit streaming mode"); > > + return ret; > > + } > > + > > return 0; > > } > > > > -- > > 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Robert Foss <robert.foss@linaro.org> To: Marco Felsch <m.felsch@pengutronix.de> Cc: "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" <devicetree@vger.kernel.org>, Dongchun Zhu <dongchun.zhu@mediatek.com>, linux-kernel <linux-kernel@vger.kernel.org>, Tomasz Figa <tfiga@chromium.org>, Ben Kao <ben.kao@intel.com>, Sakari Ailus <sakari.ailus@iki.fi>, Maxime Ripard <maxime@cerno.tech>, Andy Shevchenko <andriy.shevchenko@linux.intel.com>, Fabio Estevam <festevam@gmail.com>, "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" <linux-arm-kernel@lists.infradead.org>, linux-media <linux-media@vger.kernel.org> Subject: Re: [PATCH v7 3/3] media: ov8856: Implement sensor module revision identification Date: Wed, 6 May 2020 16:48:06 +0200 [thread overview] Message-ID: <CAG3jFyvvzk8n1+fkfS5h6TPpqMQ3sGXuJ1_yot1MKFRTcDkhnQ@mail.gmail.com> (raw) In-Reply-To: <20200505101729.GF18755@pengutronix.de> Hey Marco, On Tue, 5 May 2020 at 12:17, Marco Felsch <m.felsch@pengutronix.de> wrote: > > Hi Robert, > > On 20-05-05 12:01, Robert Foss wrote: > > Query the sensor for its module revision, and compare it > > to known revisions. > > > > Currently 2A and 1B revision indentification is supported. > > > > Signed-off-by: Robert Foss <robert.foss@linaro.org> > > --- > > > > - Changes since v3: > > * Actually add module revision 2A > > > > - Changes since v2: > > * Add module revision 2A > > * Sakari: Remove ov8856_check_revision() > > * Sakari: Stop EEPROM streaming mode > > > > drivers/media/i2c/ov8856.c | 53 ++++++++++++++++++++++++++++++++++++++ > > 1 file changed, 53 insertions(+) > > > > diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c > > index e6418a79801e..3c82c3e588d7 100644 > > --- a/drivers/media/i2c/ov8856.c > > +++ b/drivers/media/i2c/ov8856.c > > @@ -32,6 +32,19 @@ > > #define OV8856_MODE_STANDBY 0x00 > > #define OV8856_MODE_STREAMING 0x01 > > > > +/* module revisions */ > > +#define OV8856_2A_MODULE 0x01 > > +#define OV8856_1B_MODULE 0x02 > > + > > +/* the OTP read-out buffer is at 0x7000 and 0xf is the offset > > + * of the byte in the OTP that means the module revision > > + */ > > +#define OV8856_MODULE_REVISION 0x700f > > +#define OV8856_OTP_MODE_CTRL 0x3d84 > > +#define OV8856_OTP_LOAD_CTRL 0x3d81 > > +#define OV8856_OTP_MODE_AUTO 0x00 > > +#define OV8856_OTP_LOAD_CTRL_ENABLE BIT(0) > > + > > /* vertical-timings from sensor */ > > #define OV8856_REG_VTS 0x380e > > #define OV8856_VTS_MAX 0x7fff > > @@ -1152,6 +1165,46 @@ static int ov8856_identify_module(struct ov8856 *ov8856) > > return -ENXIO; > > } > > > > + ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, > > + OV8856_REG_VALUE_08BIT, OV8856_MODE_STREAMING); > > + if (ret) > > + return ret; > > + > > + ret = ov8856_write_reg(ov8856, OV8856_OTP_MODE_CTRL, > > + OV8856_REG_VALUE_08BIT, OV8856_OTP_MODE_AUTO); > > + if (ret) { > > + dev_err(&client->dev, "failed to set otp mode"); > > + return ret; > > + } > > + > > + ret = ov8856_write_reg(ov8856, OV8856_OTP_LOAD_CTRL, > > + OV8856_REG_VALUE_08BIT, > > + OV8856_OTP_LOAD_CTRL_ENABLE); > > + if (ret) { > > + dev_err(&client->dev, "failed to enable load control"); > > + return ret; > > + } > > + > > + ret = ov8856_read_reg(ov8856, OV8856_MODULE_REVISION, > > + OV8856_REG_VALUE_08BIT, &val); > > + if (ret) { > > + dev_err(&client->dev, "failed to read module revision"); > > + return ret; > > + } > > + > > + dev_info(&client->dev, "OV8856 revision %x (%s) at address 0x%02x\n", > > + val, > > + val == OV8856_2A_MODULE ? "2A" : > > + val == OV8856_1B_MODULE ? "1B" : "unknown revision", > > + client->addr); > > Pls check the alignment here too. Ack. > > Regards, > Marco > > > + > > + ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, > > + OV8856_REG_VALUE_08BIT, OV8856_MODE_STANDBY); > > + if (ret) { > > + dev_err(&client->dev, "failed to exit streaming mode"); > > + return ret; > > + } > > + > > return 0; > > } > > > > -- > > 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-05-06 14:48 UTC|newest] Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-05-05 10:01 [PATCH v7 0/3] media: ov8856: Add devicetree support Robert Foss 2020-05-05 10:01 ` Robert Foss 2020-05-05 10:01 ` [PATCH v10 1/3] media: dt-bindings: ov8856: Document YAML bindings Robert Foss 2020-05-05 10:01 ` Robert Foss 2020-05-05 11:47 ` Dongchun Zhu 2020-05-05 11:47 ` Dongchun Zhu 2020-05-06 11:29 ` Robert Foss 2020-05-06 11:29 ` Robert Foss 2020-05-06 12:26 ` Marco Felsch 2020-05-06 12:26 ` Marco Felsch 2020-05-05 15:48 ` Rob Herring 2020-05-05 15:48 ` Rob Herring 2020-05-05 15:49 ` Rob Herring 2020-05-05 15:49 ` Rob Herring 2020-05-06 11:30 ` Robert Foss 2020-05-06 11:30 ` Robert Foss 2020-05-05 10:01 ` [PATCH v7 2/3] media: ov8856: Add devicetree support Robert Foss 2020-05-05 10:01 ` Robert Foss 2020-05-05 10:16 ` Marco Felsch 2020-05-05 10:16 ` Marco Felsch 2020-05-06 14:43 ` Robert Foss 2020-05-06 14:43 ` Robert Foss 2020-05-07 8:06 ` Kao, Ben 2020-05-07 8:06 ` Kao, Ben 2020-05-07 8:21 ` Marco Felsch 2020-05-07 8:21 ` Marco Felsch 2020-05-08 9:45 ` Kao, Ben 2020-05-08 9:45 ` Kao, Ben 2020-05-07 8:39 ` Robert Foss 2020-05-07 8:39 ` Robert Foss 2020-05-08 9:50 ` Kao, Ben 2020-05-08 9:50 ` Kao, Ben 2020-05-05 10:01 ` [PATCH v7 3/3] media: ov8856: Implement sensor module revision identification Robert Foss 2020-05-05 10:01 ` Robert Foss 2020-05-05 10:17 ` Marco Felsch 2020-05-05 10:17 ` Marco Felsch 2020-05-06 14:48 ` Robert Foss [this message] 2020-05-06 14:48 ` Robert Foss
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