From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932610AbcFCKBj (ORCPT ); Fri, 3 Jun 2016 06:01:39 -0400 Received: from mail-pf0-f182.google.com ([209.85.192.182]:36222 "EHLO mail-pf0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932550AbcFCKBg (ORCPT ); Fri, 3 Jun 2016 06:01:36 -0400 From: Rocky Hsiao To: linux-iio@vger.kernel.org Cc: Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald , Rocky Hsiao , linux-kernel@vger.kernel.org, John Huang , Thomas Lin Subject: [PATCH 1/2] iio: light: al3320a: support illuminance0_input function Date: Fri, 3 Jun 2016 18:00:16 +0800 Message-Id: <1464948016-49062-1-git-send-email-rocky.hsiao@dyna-image.com> X-Mailer: git-send-email 2.1.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add few functions to show lux. Signed-off-by: Rocky Hsiao --- drivers/iio/light/al3320a.c | 50 +++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 48 insertions(+), 2 deletions(-) diff --git a/drivers/iio/light/al3320a.c b/drivers/iio/light/al3320a.c index 6aac651..f32b5d1 100644 --- a/drivers/iio/light/al3320a.c +++ b/drivers/iio/light/al3320a.c @@ -11,6 +11,13 @@ * * TODO: interrupt support, thresholds * + * last change: 2016/06/03 + * + * change list: + * - add few function to supprt illuminance0_input + * + * editor: Rocky Hsiao + * */ #include @@ -72,9 +79,47 @@ static const struct iio_chan_spec al3320a_channels[] = { } }; +static int al3320a_get_adc_value(struct al3320a_data *data) +{ + int val; + + val = i2c_smbus_read_word_data(data->client, AL3320A_REG_DATA_LOW); + + return val; +} + +static int al3320a_get_lux(struct al3320a_data *data) +{ + int ret; + long ret64; + + ret = al3320a_get_adc_value(data); + ret64 = ret; + ret64 = (ret64 * 32000) / 1000000; + ret = ret64; + + return ret; +} + +static ssize_t al3320a_lux_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct al3320a_data *data = iio_priv(dev_to_iio_dev(dev)); + int val; + + val = al3320a_get_lux(data); + + return sprintf(buf, "%d\n", val); +} + +static IIO_DEVICE_ATTR(illuminance0_input, S_IRUGO, + al3320a_lux_show, NULL, 0); + static IIO_CONST_ATTR(in_illuminance_scale_available, AL3320A_SCALE_AVAILABLE); static struct attribute *al3320a_attributes[] = { + &iio_dev_attr_illuminance0_input.dev_attr.attr, &iio_const_attr_in_illuminance_scale_available.dev_attr.attr, NULL, }; @@ -125,8 +170,8 @@ static int al3320a_read_raw(struct iio_dev *indio_dev, * - low byte of output is stored at AL3320A_REG_DATA_LOW * - high byte of output is stored at AL3320A_REG_DATA_LOW + 1 */ - ret = i2c_smbus_read_word_data(data->client, - AL3320A_REG_DATA_LOW); + ret = al3320a_get_adc_value(data); + if (ret < 0) return ret; *val = ret; @@ -201,6 +246,7 @@ static int al3320a_probe(struct i2c_client *client, dev_err(&client->dev, "al3320a chip init failed\n"); return ret; } + return devm_iio_device_register(&client->dev, indio_dev); } -- 2.1.2