From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D02C0C7EE2D for ; Wed, 17 May 2023 15:14:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231617AbjEQPOV (ORCPT ); Wed, 17 May 2023 11:14:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43896 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230313AbjEQPOU (ORCPT ); Wed, 17 May 2023 11:14:20 -0400 Received: from smtp1.axis.com (smtp1.axis.com [195.60.68.17]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7838412F; Wed, 17 May 2023 08:14:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=axis.com; q=dns/txt; s=axis-central1; t=1684336459; x=1715872459; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=2vg0DObVjExJWxcpHjWrhXk1eH5SbEn+msAa6n+tjpo=; b=W1r8w/NoT2J/8vghQiNJSFJmxTpFT+BllO6c8UhL2g60OzwfJNrMrsBX FDmeXJbym84z/EHsFrXfCrUgE/A5VX7Q9W3sta1djnsTy6nasiXN3QAi+ BIHg6XAKhji+Wxn5XaMcFRZ7Q4VVNHd4fMBdl8/LTMgGRx10BTYlqvUhV KoqIGb1TCiRIN7OrCZ4b/OBhotkSH6fTQ4+PAM6nWaMM5oyqicp03OrE2 AP4QIYPQC32FfXYT3UIVV+mwSrevvwxk2SsAIK0FC0seYWIYXXDvL/fgR Sz2RDTABxn7g46IichlHh6wV1/dp1W+1UWOopoUJjnV7/llNSa30nDERL Q==; From: Astrid Rost To: Jonathan Cameron , Lars-Peter Clausen CC: , , , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Mathieu Othacehe , Astrid Rost Subject: [PATCH v3 7/7] iio: light: vcnl4000: Add calibration bias for 4040/4200 Date: Wed, 17 May 2023 17:14:06 +0200 Message-ID: <20230517151406.368219-8-astrid.rost@axis.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230517151406.368219-1-astrid.rost@axis.com> References: <20230517151406.368219-1-astrid.rost@axis.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org The calibration bias is setting the LED current to change the detection distance. Add read/write attribute for proximity calibration bias and read attribute for available values. This is supported for vcnl4040 and vcnl4200. Signed-off-by: Astrid Rost --- drivers/iio/light/vcnl4000.c | 98 ++++++++++++++++++++++++++++++++++-- 1 file changed, 95 insertions(+), 3 deletions(-) diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c index 631ed6aa26b2..0a6e38e56a7c 100644 --- a/drivers/iio/light/vcnl4000.c +++ b/drivers/iio/light/vcnl4000.c @@ -91,6 +91,7 @@ #define VCNL4040_CONF1_PS_PERS GENMASK(5, 4) /* Proximity interrupt persistence setting */ #define VCNL4040_PS_CONF2_PS_INT GENMASK(9, 8) /* Proximity interrupt mode */ #define VCNL4040_PS_CONF3_MPS GENMASK(6, 5) /* Proximity multi pulse number */ +#define VCNL4040_PS_MS_LED_I GENMASK(10, 8) /* Proximity current */ #define VCNL4040_PS_IF_AWAY BIT(8) /* Proximity event cross low threshold */ #define VCNL4040_PS_IF_CLOSE BIT(9) /* Proximity event cross high threshold */ #define VCNL4040_ALS_RISING BIT(12) /* Ambient Light cross high threshold */ @@ -156,6 +157,18 @@ static const int vcnl4200_als_it_times[][2] = { {0, 200000}, {0, 400000}, }; + +static const int vcnl4040_ps_calibbias_ua[][2] = { + {0, 50000}, + {0, 75000}, + {0, 100000}, + {0, 120000}, + {0, 140000}, + {0, 160000}, + {0, 180000}, + {0, 200000}, +}; + static const int vcnl4040_als_persistence[] = {1, 2, 4, 8}; static const int vcnl4040_ps_persistence[] = {1, 2, 3, 4}; static const int vcnl4040_ps_oversampling_ratio[] = {1, 2, 4, 8}; @@ -831,6 +844,57 @@ static ssize_t vcnl4040_write_ps_oversampling_ratio(struct vcnl4000_data *data, return ret; } +static ssize_t vcnl4040_read_ps_calibbias(struct vcnl4000_data *data, int *val, int *val2) +{ + int ret; + + ret = i2c_smbus_read_word_data(data->client, VCNL4200_PS_CONF3); + if (ret < 0) + return ret; + + ret = FIELD_GET(VCNL4040_PS_MS_LED_I, ret); + + if (ret >= ARRAY_SIZE(vcnl4040_ps_calibbias_ua)) + return -EINVAL; + + *val = vcnl4040_ps_calibbias_ua[ret][0]; + *val2 = vcnl4040_ps_calibbias_ua[ret][1]; + + return ret; +} + +static ssize_t vcnl4040_write_ps_calibbias(struct vcnl4000_data *data, int val) +{ + unsigned int i; + int ret, index = -1; + u16 regval; + + for (i = 0; i < ARRAY_SIZE(vcnl4040_ps_calibbias_ua); i++) { + if (val == vcnl4040_ps_calibbias_ua[i][1]) { + index = i; + break; + } + } + + if (index < 0) + return -EINVAL; + + mutex_lock(&data->vcnl4000_lock); + + ret = i2c_smbus_read_word_data(data->client, VCNL4200_PS_CONF3); + if (ret < 0) + goto out; + + regval = (ret & ~VCNL4040_PS_MS_LED_I) | + FIELD_PREP(VCNL4040_PS_MS_LED_I, index); + ret = i2c_smbus_write_word_data(data->client, VCNL4200_PS_CONF3, + regval); + +out: + mutex_unlock(&data->vcnl4000_lock); + return ret; +} + static int vcnl4000_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) @@ -891,7 +955,16 @@ static int vcnl4000_read_raw(struct iio_dev *indio_dev, default: return -EINVAL; } - + case IIO_CHAN_INFO_CALIBBIAS: + switch (chan->type) { + case IIO_PROXIMITY: + ret = vcnl4040_read_ps_calibbias(data, val, val2); + if (ret < 0) + return ret; + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } default: return -EINVAL; } @@ -922,6 +995,13 @@ static int vcnl4040_write_raw(struct iio_dev *indio_dev, default: return -EINVAL; } + case IIO_CHAN_INFO_CALIBBIAS: + switch (chan->type) { + case IIO_PROXIMITY: + return vcnl4040_write_ps_calibbias(data, val2); + default: + return -EINVAL; + } default: return -EINVAL; } @@ -961,6 +1041,16 @@ static int vcnl4040_read_avail(struct iio_dev *indio_dev, default: return -EINVAL; } + case IIO_CHAN_INFO_CALIBBIAS: + switch (chan->type) { + case IIO_PROXIMITY: + *vals = (int *)vcnl4040_ps_calibbias_ua; + *length = 2 * ARRAY_SIZE(vcnl4040_ps_calibbias_ua); + *type = IIO_VAL_INT_PLUS_MICRO; + return IIO_AVAIL_LIST; + default: + return -EINVAL; + } default: return -EINVAL; } @@ -1729,9 +1819,11 @@ static const struct iio_chan_spec vcnl4040_channels[] = { .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_INT_TIME), .info_mask_separate_available = BIT(IIO_CHAN_INFO_INT_TIME), - BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), + BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO) | + BIT(IIO_CHAN_INFO_CALIBBIAS), .info_mask_separate_available = BIT(IIO_CHAN_INFO_INT_TIME) | - BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), + BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO) | + BIT(IIO_CHAN_INFO_CALIBBIAS), .ext_info = vcnl4000_ext_info, .event_spec = vcnl4040_event_spec, .num_event_specs = ARRAY_SIZE(vcnl4040_event_spec), -- 2.30.2