From patchwork Tue Sep 6 09:04:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Crt Mori X-Patchwork-Id: 12967121 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 C79A6C54EE9 for ; Tue, 6 Sep 2022 09:05:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239547AbiIFJFA (ORCPT ); Tue, 6 Sep 2022 05:05:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37124 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234150AbiIFJE6 (ORCPT ); Tue, 6 Sep 2022 05:04:58 -0400 Received: from mail-ej1-x634.google.com (mail-ej1-x634.google.com [IPv6:2a00:1450:4864:20::634]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C11DC17E19 for ; Tue, 6 Sep 2022 02:04:57 -0700 (PDT) Received: by mail-ej1-x634.google.com with SMTP id qh18so21643160ejb.7 for ; Tue, 06 Sep 2022 02:04:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=melexis.com; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date; bh=4yFAOWbxAtGl2PyfPR7jYQGQMm31HYr0AN+6Bv49Vv4=; b=omvY7562bz7V+wlaASP8yvfHXqY+U9lUaWQEsKuNy114e0A6NJrELZMoFjzeNBNRyw 0J/+vuqsr4upQxBMg3vwZNrxOITDB86fZhPspErWNLDcsPuXFFtjXG7yjC3S+bDq7oZ0 ZIPClqHKlZ04yXF3jIEk1E9dTbhvIBELbfRpK1f7DEgJh7tWS1JLMMOR0TRgP/Gm2PEg An3NE1oGs9qp3pzmKE554QA42HRdwQ/RkpmjMwkauFbkUMC8fM8/Lfkoq4Nt1nTWlQzH Yro1CdlTtpLkNopbZcdgP+PSib/WJ00rJDyHpbOEMwV4+BytpPrbfZFvAMSJG/nfwYij vdVg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date; bh=4yFAOWbxAtGl2PyfPR7jYQGQMm31HYr0AN+6Bv49Vv4=; b=zjjsRALDrqLrVLffCb1R95GbKsNsQNel6tPsTaREi0yB12Mdkk874qzlS0xCL734gN 2EkPh1LQa2ycGmCazlEg8JJV1STqocExtKrYj3jrJPITc7sfU+ODV3qxIE2pbj1tfDHq kGTOzU2xY82aaZDpcnI6UzmL975d097Rx55zyl8f6Lz2mqkkC/klYKHVoUYL4fVecRMJ 2bmqtsZvBoEuXz1LzD3+yO97BnrwH82Biclmxh6YndAdHY+PFQEwe8ALbw6Qu90yxwoB 7JVbUXLfx1fqDtkpsss4UqPNlkWMBTpJtgKRjx0/cbMof7f4wVenx10JNa3Yn5sHysVp z93w== X-Gm-Message-State: ACgBeo3vVQwwcR4UBOQdxhs4xPRGwRbjzxvIIxLpeEd2528+7bHEB4DQ 2oNfYwpdBx+5QZjduJ23boknLg== X-Google-Smtp-Source: AA6agR4qRV6z1idl4v09C4ERCwA0d5Cd0bspmRWcDioM9B0pUiq7MVgstVKw0wa2yfDJ7GCneZeFQw== X-Received: by 2002:a17:907:7601:b0:73d:9f0b:d99f with SMTP id jx1-20020a170907760100b0073d9f0bd99fmr38156843ejc.300.1662455096894; Tue, 06 Sep 2022 02:04:56 -0700 (PDT) Received: from cmo-ThinkPad-T495.telenet.be ([194.150.35.21]) by smtp.gmail.com with ESMTPSA id b29-20020a50ccdd000000b0044ebf63d337sm1612531edj.57.2022.09.06.02.04.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Sep 2022 02:04:56 -0700 (PDT) From: cmo@melexis.com To: Jonathan Cameron Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Andy Shevchenko , Crt Mori Subject: [PATCH v3 2/3] iio: temperature: mlx90632 Read sampling frequency Date: Tue, 6 Sep 2022 11:04:31 +0200 Message-Id: <8d206235a7241fe764d9d51649061a4fd1b534d6.1662454215.git.cmo@melexis.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org From: Crt Mori Allow users to read sensor sampling frequency to better plan the application measurement requests. Signed-off-by: Crt Mori Reviewed-by: Andy Shevchenko --- drivers/iio/temperature/mlx90632.c | 51 ++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c index e41a18edbc65..6b33284eb0b6 100644 --- a/drivers/iio/temperature/mlx90632.c +++ b/drivers/iio/temperature/mlx90632.c @@ -81,6 +81,9 @@ #define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous */ #define MLX90632_EE_RR GENMASK(10, 8) /* Only Refresh Rate bits */ +#define MLX90632_REFRESH_RATE(ee_val) FIELD_GET(MLX90632_EE_RR, ee_val) + /* Extract Refresh Rate from ee register */ +#define MLX90632_REFRESH_RATE_STATUS(refresh_rate) (refresh_rate << 8) /* Measurement types */ #define MLX90632_MTYP_MEDICAL 0 @@ -915,6 +918,24 @@ static int mlx90632_calc_ambient_dsp105(struct mlx90632_data *data, int *val) return ret; } +static int mlx90632_get_refresh_rate(struct mlx90632_data *data, + int *refresh_rate) +{ + unsigned int meas1; + int ret; + + ret = regmap_read(data->regmap, MLX90632_EE_MEDICAL_MEAS1, &meas1); + if (ret < 0) + return ret; + + *refresh_rate = MLX90632_REFRESH_RATE(meas1); + + return ret; +} + +static const int mlx90632_freqs[][2] = { {0, 500000}, {1, 0}, {2, 0}, {4, 0}, + {8, 0}, {16, 0}, {32, 0}, {64, 0} }; + /** * mlx90632_pm_interraction_wakeup() - Measure time between user interactions to change powermode * @data: pointer to mlx90632_data object containing interaction_ts information @@ -993,6 +1014,15 @@ static int mlx90632_read_raw(struct iio_dev *indio_dev, *val = data->object_ambient_temperature; ret = IIO_VAL_INT; break; + case IIO_CHAN_INFO_SAMP_FREQ: + ret = mlx90632_get_refresh_rate(data, &cr); + if (ret < 0) + goto mlx90632_read_raw_pm; + + *val = mlx90632_freqs[cr][0]; + *val2 = mlx90632_freqs[cr][1]; + ret = IIO_VAL_INT_PLUS_MICRO; + break; default: ret = -EINVAL; break; @@ -1026,12 +1056,30 @@ static int mlx90632_write_raw(struct iio_dev *indio_dev, } } +static int mlx90632_read_avail(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + const int **vals, int *type, int *length, + long mask) +{ + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + *vals = (int *)mlx90632_freqs; + *type = IIO_VAL_INT_PLUS_MICRO; + *length = 2 * ARRAY_SIZE(mlx90632_freqs); + return IIO_AVAIL_LIST; + default: + return -EINVAL; + } +} + static const struct iio_chan_spec mlx90632_channels[] = { { .type = IIO_TEMP, .modified = 1, .channel2 = IIO_MOD_TEMP_AMBIENT, .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), + .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_SAMP_FREQ), }, { .type = IIO_TEMP, @@ -1039,12 +1087,15 @@ static const struct iio_chan_spec mlx90632_channels[] = { .channel2 = IIO_MOD_TEMP_OBJECT, .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | BIT(IIO_CHAN_INFO_CALIBEMISSIVITY) | BIT(IIO_CHAN_INFO_CALIBAMBIENT), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), + .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_SAMP_FREQ), }, }; static const struct iio_info mlx90632_info = { .read_raw = mlx90632_read_raw, .write_raw = mlx90632_write_raw, + .read_avail = mlx90632_read_avail, }; static int mlx90632_sleep(struct mlx90632_data *data)