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[90.182.112.124]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4a17c7b7f00sm19805495e9.13.2026.10.06.04.44.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Oct 2026 04:44:46 -0700 (PDT) Date: Tue, 6 Oct 2026 13:44:43 +0200 From: Joshua Crofts To: Liu Yufei Cc: Jonathan Cameron , Rob Herring , Krzysztof Kozlowski , Conor Dooley , David Lechner , Nuno =?ISO-8859-1?Q?S=E1?= , Andy Shevchenko , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 2/2] iio: proximity: Add driver for Vishay VCNL36829 Message-ID: <20261006134443.00000bc9@gmail.com> In-Reply-To: <20261006100943.78971-3-lyf98405@gmail.com> References: <20261006100943.78971-1-lyf98405@gmail.com> <20261006100943.78971-3-lyf98405@gmail.com> X-Mailer: Claws Mail 4.4.0 (GTK 3.24.51; x86_64-w64-mingw32) Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Tue, 6 Oct 2026 18:09:43 +0800 Liu Yufei wrote: > From: Liu Yufei > > Add an IIO driver for the Vishay VCNL36829 proximity sensor with > integrated VCSEL, connected over I2C. > > At probe the driver enables the vdd and vddio supplies, waits for the > sensor to power up, checks the device ID, configures the VCSEL current > and photodiodes, and turns the proximity engine on. The sensor is put > back into shutdown when the device is removed. > > The following attributes are exposed: > - in_proximity0_raw > - in_proximity_integration_time > - in_proximity_integration_time_available > > Datasheet: https://www.vishay.com/docs/80580/vcnl36829um.pdf > Assisted-by: LLM > Signed-off-by: Liu Yufei > --- ... > +static int vcnl36829_probe(struct i2c_client *client) > +{ > + struct device *dev = &client->dev; > + struct vcnl36829_data *data; > + struct iio_dev *indio_dev; > + struct regmap *regmap; > + unsigned int reg; > + int ret; > + > + indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); > + if (!indio_dev) > + return -ENOMEM; > + > + regmap = devm_regmap_init_i2c(client, &vcnl36829_regmap_config); > + if (IS_ERR(regmap)) > + return dev_err_probe(dev, PTR_ERR(regmap), "Regmap setup failed\n"); > + > + data = iio_priv(indio_dev); > + data->regmap = regmap; > + > + indio_dev->name = "vcnl36829"; > + indio_dev->info = &vcnl36829_info; > + indio_dev->channels = vcnl36829_channels; > + indio_dev->num_channels = ARRAY_SIZE(vcnl36829_channels); > + indio_dev->modes = INDIO_DIRECT_MODE; > + > + ret = devm_regulator_get_enable(dev, "vdd"); > + if (ret) > + return dev_err_probe(dev, ret, "failed to enable vdd\n"); > + > + ret = devm_regulator_get_enable(dev, "vddio"); > + if (ret) > + return dev_err_probe(dev, ret, "failed to enable vddio\n"); > + > + /* > + * The datasheet does not specify a power-up settling time. > + * Wait 3 ms after enabling the supplies before accessing the > + * device, as a conservative value. > + */ > + fsleep(3 * USEC_PER_MSEC); > + > + ret = regmap_read(regmap, VCNL36829_DEV_ID, ®); > + if (ret) > + return dev_err_probe(dev, ret, "Failed to read device ID\n"); > + if ((reg & 0xFF) != VCNL36829_DEV_ID_VAL) > + dev_warn(dev, "Unknown device ID 0x%x\n", reg & 0xFF); I'd rather be soft and do dev_info() instead (perhaps this could be tweaked when applying). Otherwise this looks good to me! Reviewed-by: Joshua Crofts -- Kind regards, Joshua Crofts