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X-CSE-ConnectionGUID: IgAJN1uITQGrsGibyanrJg== X-CSE-MsgGUID: 19Pxq8qNQkKbdwPwKw0oeQ== X-IronPort-AV: E=McAfee;i="6800,10657,11731"; a="100218948" X-IronPort-AV: E=Sophos;i="6.23,124,1770624000"; d="scan'208";a="100218948" Received: from orviesa008.jf.intel.com ([10.64.159.148]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Mar 2026 01:46:08 -0700 X-CSE-ConnectionGUID: +cBoXIEDSCWAr7IKOMp3Jw== X-CSE-MsgGUID: +XWBVvGfRH6RYxXEjBcSBQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,124,1770624000"; d="scan'208";a="222254270" Received: from pgcooper-mobl3.ger.corp.intel.com (HELO kekkonen.fi.intel.com) ([10.245.245.106]) by orviesa008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Mar 2026 01:46:05 -0700 Received: from kekkonen.localdomain (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with SMTP id C586C121D04; Tue, 17 Mar 2026 10:46:03 +0200 (EET) Date: Tue, 17 Mar 2026 10:46:03 +0200 Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo From: Sakari Ailus To: Matthias Fend Cc: Jimmy Su , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Philipp Zabel , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, bsp-development.geo@leica-geosystems.com Subject: Re: [PATCH v2 8/9] media: i2c: ov08d10: add support for reset and power management Message-ID: References: <20260309-ov08d10-v2-0-81f8b5d99984@emfend.at> <20260309-ov08d10-v2-8-81f8b5d99984@emfend.at> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260309-ov08d10-v2-8-81f8b5d99984@emfend.at> On Mon, Mar 09, 2026 at 06:07:10PM +0100, Matthias Fend wrote: > Add support for the required power supplies as well as the control of an > optional sensor reset. > > Signed-off-by: Matthias Fend > --- > drivers/media/i2c/ov08d10.c | 93 ++++++++++++++++++++++++++++++++++++++++++++- > 1 file changed, 92 insertions(+), 1 deletion(-) > > diff --git a/drivers/media/i2c/ov08d10.c b/drivers/media/i2c/ov08d10.c > index ce0fa30a86129302b5dda0b8796e44054fd77c88..19035991e8bb164d4fca5d87ee4551191974e8bb 100644 > --- a/drivers/media/i2c/ov08d10.c > +++ b/drivers/media/i2c/ov08d10.c > @@ -8,6 +8,7 @@ > #include > #include > #include > +#include > #include > #include > #include > @@ -513,9 +514,17 @@ static const char * const ov08d10_test_pattern_menu[] = { > "Standard Color Bar", > }; > > +static const char *const ov08d10_supply_names[] = { > + "dovdd", /* Digital I/O power */ > + "avdd", /* Analog power */ > + "dvdd", /* Digital core power */ > +}; > + > struct ov08d10 { > struct device *dev; > struct clk *clk; > + struct reset_control *reset; > + struct regulator_bulk_data supplies[ARRAY_SIZE(ov08d10_supply_names)]; > > struct v4l2_subdev sd; > struct media_pad pad; > @@ -1265,6 +1274,56 @@ static const struct v4l2_subdev_internal_ops ov08d10_internal_ops = { > .open = ov08d10_open, > }; > > +static int ov08d10_power_off(struct device *dev) > +{ > + struct v4l2_subdev *sd = dev_get_drvdata(dev); > + struct ov08d10 *ov08d10 = to_ov08d10(sd); > + > + reset_control_assert(ov08d10->reset); > + > + regulator_bulk_disable(ARRAY_SIZE(ov08d10->supplies), > + ov08d10->supplies); > + > + clk_disable_unprepare(ov08d10->clk); > + > + return 0; > +} > + > +static int ov08d10_power_on(struct device *dev) > +{ > + struct v4l2_subdev *sd = dev_get_drvdata(dev); > + struct ov08d10 *ov08d10 = to_ov08d10(sd); > + int ret; > + > + ret = regulator_bulk_enable(ARRAY_SIZE(ov08d10->supplies), > + ov08d10->supplies); > + if (ret < 0) { > + dev_err(dev, "failed to enable regulators: %d\n", ret); > + return ret; > + } > + > + ret = clk_prepare_enable(ov08d10->clk); > + if (ret < 0) { > + regulator_bulk_disable(ARRAY_SIZE(ov08d10->supplies), > + ov08d10->supplies); > + > + dev_err(dev, "failed to enable imaging clock: %d\n", ret); > + return ret; > + } > + > + if (ov08d10->reset) { > + /* Delay from DVDD stable to sensor XSHUTDN pull up: 5ms */ > + fsleep(5 * USEC_PER_MSEC); > + > + reset_control_deassert(ov08d10->reset); > + > + /* Delay from XSHUTDN pull up to SCCB start: 8ms */ > + fsleep(8 * USEC_PER_MSEC); > + } > + > + return 0; > +} > + > static int ov08d10_identify_module(struct ov08d10 *ov08d10) > { > struct i2c_client *client = v4l2_get_subdevdata(&ov08d10->sd); > @@ -1371,6 +1430,10 @@ static void ov08d10_remove(struct i2c_client *client) > media_entity_cleanup(&sd->entity); > v4l2_ctrl_handler_free(sd->ctrl_handler); > pm_runtime_disable(ov08d10->dev); > + if (!pm_runtime_status_suspended(ov08d10->dev)) { > + ov08d10_power_off(ov08d10->dev); > + pm_runtime_set_suspended(ov08d10->dev); > + } > mutex_destroy(&ov08d10->mutex); > } > > @@ -1378,6 +1441,7 @@ static int ov08d10_probe(struct i2c_client *client) > { > struct ov08d10 *ov08d10; > unsigned long freq; > + unsigned int i; > int ret; > > ov08d10 = devm_kzalloc(&client->dev, sizeof(*ov08d10), GFP_KERNEL); > @@ -1403,12 +1467,32 @@ static int ov08d10_probe(struct i2c_client *client) > return ret; > } > > + ov08d10->reset = devm_reset_control_get_optional_exclusive(ov08d10->dev, NULL); > + if (IS_ERR(ov08d10->reset)) > + return dev_err_probe(ov08d10->dev, PTR_ERR(ov08d10->reset), > + "failed to get reset\n"); > + reset_control_assert(ov08d10->reset); > + > + for (i = 0; i < ARRAY_SIZE(ov08d10_supply_names); i++) You can declare i here. > + ov08d10->supplies[i].supply = ov08d10_supply_names[i]; > + > + ret = devm_regulator_bulk_get(ov08d10->dev, > + ARRAY_SIZE(ov08d10->supplies), > + ov08d10->supplies); > + if (ret) > + return dev_err_probe(ov08d10->dev, ret, > + "failed to get regulators\n"); > + > v4l2_i2c_subdev_init(&ov08d10->sd, client, &ov08d10_subdev_ops); > > + ret = ov08d10_power_on(ov08d10->dev); > + if (ret) > + return dev_err_probe(ov08d10->dev, ret, "failed to power on\n"); > + > ret = ov08d10_identify_module(ov08d10); > if (ret) { > dev_err(ov08d10->dev, "failed to find sensor: %d\n", ret); > - return ret; > + goto probe_error_power_off; > } > > mutex_init(&ov08d10->mutex); > @@ -1452,9 +1536,15 @@ static int ov08d10_probe(struct i2c_client *client) > v4l2_ctrl_handler_free(ov08d10->sd.ctrl_handler); > mutex_destroy(&ov08d10->mutex); > > +probe_error_power_off: > + ov08d10_power_off(ov08d10->dev); > + > return ret; > } > > +static DEFINE_RUNTIME_DEV_PM_OPS(ov08d10_pm_ops, > + ov08d10_power_off, ov08d10_power_on, NULL); > + > #ifdef CONFIG_ACPI > static const struct acpi_device_id ov08d10_acpi_ids[] = { > { "OVTI08D1" }, > @@ -1473,6 +1563,7 @@ MODULE_DEVICE_TABLE(of, ov08d10_of_match); > static struct i2c_driver ov08d10_i2c_driver = { > .driver = { > .name = "ov08d10", > + .pm = pm_ptr(&ov08d10_pm_ops), > .acpi_match_table = ACPI_PTR(ov08d10_acpi_ids), > .of_match_table = ov08d10_of_match, > }, > -- Regards, Sakari Ailus