From patchwork Fri Feb 18 04:20:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jagath Jog J X-Patchwork-Id: 543903 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 49FE9C433F5 for ; Fri, 18 Feb 2022 04:20:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229846AbiBREVK (ORCPT ); Thu, 17 Feb 2022 23:21:10 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:55954 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229832AbiBREVH (ORCPT ); Thu, 17 Feb 2022 23:21:07 -0500 Received: from mail-pf1-x429.google.com (mail-pf1-x429.google.com [IPv6:2607:f8b0:4864:20::429]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4F0849CBA; Thu, 17 Feb 2022 20:20:49 -0800 (PST) Received: by mail-pf1-x429.google.com with SMTP id u16so1359102pfg.12; Thu, 17 Feb 2022 20:20:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=vOM8aB0sk3te+hLK1KNBy8JLp5Cb9O0neMkVeze4/9w=; b=QOqbqdXGzI2ol36L6bTEN8l7GCEHlkS6GwS8hATSvclEZaoEVFL/Q16MlkyoEaw3lP D0le2DDMEDLGefTxj6HtJ3qhQvOgCJ9/RJwcsGXSNPFnkq5YIL+PbUyCvauz23xJYvqn AiBqsh9OBcLnubxobORd1pceB2W7ptCq5phxHim6VMfePYowX+i5Cbqlz0k7PBJncTZO H1x4Fx4OeojlorljbbTakgZF6Mn/BH9NGvuBhxFNwb8NcbEebPbY5BRwYUOaQZPteGLy Axa4sCks6rm46IuA5k8iL4rcO7hT7wydaGIPGF4n9rHNHrFgS0wjaIUAoxHQpfIq5MsF QKYg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=vOM8aB0sk3te+hLK1KNBy8JLp5Cb9O0neMkVeze4/9w=; b=GZ3Lwv9ddrT3yg2IWtY29wgccE8xKqNP9Obp8FtO762JDur8Oz/pK6PtvhF9ZgVPhM fm7GjE6xpD6ynEIb1iuPSYlLfbo1Q4Do2BgV/mqjc/IYclxkfM5iAR9wkWcxQYy1lnUQ UTHMnatRJmJ/dydEhqAPTrTBPXBhYcT9D927wOXu9SbX/KgePnNm5+aLoZ4a8Dpt5OlH hjawVWs1XsLyzwIOFg5LuJUsceOmeWQqhbFUMKgvpJApW+iSBMnUcH5WbEs7CxqhWQyH O/0Linygb+ee6DDMLYzRZnGNTRSVVQZqcvNXK5KXJA/bKSBYz61cVYXNDhIhWC/ImzKV G/TQ== X-Gm-Message-State: AOAM530V/XcV4mwsFbaoWfJ/x6LUgQR5fTCzjHUgDuALwJodQz2cbfiy LT2cn9O0YacMmMo7xaWHaZE= X-Google-Smtp-Source: ABdhPJzXI5DFxXleHzuIADapJ3smSmpuIMtyvSOh0zCIjmEl2BaEoFUzzKJbCzMcfxCTcKRJmT2Y8w== X-Received: by 2002:a05:6a00:1c47:b0:4e1:2c3a:ac3d with SMTP id s7-20020a056a001c4700b004e12c3aac3dmr5939058pfw.15.1645158049201; Thu, 17 Feb 2022 20:20:49 -0800 (PST) Received: from localhost.localdomain ([60.243.248.66]) by smtp.gmail.com with ESMTPSA id h26sm9530300pgm.72.2022.02.17.20.20.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Feb 2022 20:20:48 -0800 (PST) From: Jagath Jog J To: jic23@kernel.org, lars@metafoo.de, andy.shevchenko@gmail.com, sst@poczta.fm, robh+dt@kernel.org Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 2/6] iio: potentiometer: Add available functionality Date: Fri, 18 Feb 2022 09:50:34 +0530 Message-Id: <20220218042038.15176-3-jagathjog1996@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220218042038.15176-1-jagathjog1996@gmail.com> References: <20220218042038.15176-1-jagathjog1996@gmail.com> Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Adding available functionality for DS1803 driver which will show the minimum, step and maximum values that the driver can accepts through sysfs entry. Now using the max value present in avail array instead of chip type specific macro to make the driver flexible to add other type of potentiometer with different max position value. Signed-off-by: Jagath Jog J --- drivers/iio/potentiometer/ds1803.c | 50 ++++++++++++++++++++---------- 1 file changed, 34 insertions(+), 16 deletions(-) diff --git a/drivers/iio/potentiometer/ds1803.c b/drivers/iio/potentiometer/ds1803.c index 3c542a50ece6..d1e00dda337a 100644 --- a/drivers/iio/potentiometer/ds1803.c +++ b/drivers/iio/potentiometer/ds1803.c @@ -16,7 +16,6 @@ #include #include -#define DS1803_MAX_POS 255 #define DS1803_WRITE(chan) (0xa8 | ((chan) + 1)) enum ds1803_type { @@ -26,27 +25,23 @@ enum ds1803_type { }; struct ds1803_cfg { + int avail[3]; int kohms; }; -static const struct ds1803_cfg ds1803_cfg[] = { - [DS1803_010] = { .kohms = 10, }, - [DS1803_050] = { .kohms = 50, }, - [DS1803_100] = { .kohms = 100, }, -}; - struct ds1803_data { struct i2c_client *client; const struct ds1803_cfg *cfg; }; -#define DS1803_CHANNEL(ch) { \ - .type = IIO_RESISTANCE, \ - .indexed = 1, \ - .output = 1, \ - .channel = (ch), \ - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ - .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ +#define DS1803_CHANNEL(ch) { \ + .type = IIO_RESISTANCE, \ + .indexed = 1, \ + .output = 1, \ + .channel = (ch), \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ + .info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_RAW), \ } static const struct iio_chan_spec ds1803_channels[] = { @@ -54,6 +49,12 @@ static const struct iio_chan_spec ds1803_channels[] = { DS1803_CHANNEL(1), }; +static const struct ds1803_cfg ds1803_cfg[] = { + [DS1803_010] = { .avail = { 0, 1, 255 }, .kohms = 10, }, + [DS1803_050] = { .avail = { 0, 1, 255 }, .kohms = 50, }, + [DS1803_100] = { .avail = { 0, 1, 255 }, .kohms = 100, }, +}; + static int ds1803_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) @@ -75,7 +76,7 @@ static int ds1803_read_raw(struct iio_dev *indio_dev, case IIO_CHAN_INFO_SCALE: *val = 1000 * data->cfg->kohms; - *val2 = DS1803_MAX_POS; + *val2 = data->cfg->avail[2]; /* Max wiper position */ return IIO_VAL_FRACTIONAL; } @@ -88,13 +89,14 @@ static int ds1803_write_raw(struct iio_dev *indio_dev, { struct ds1803_data *data = iio_priv(indio_dev); int pot = chan->channel; + int max_pos = data->cfg->avail[2]; if (val2 != 0) return -EINVAL; switch (mask) { case IIO_CHAN_INFO_RAW: - if (val > DS1803_MAX_POS || val < 0) + if (val > max_pos || val < 0) return -EINVAL; break; default: @@ -104,9 +106,25 @@ static int ds1803_write_raw(struct iio_dev *indio_dev, return i2c_smbus_write_byte_data(data->client, DS1803_WRITE(pot), val); } +static int ds1803_read_avail(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, + const int **vals, int *type, int *length, long mask) +{ + struct ds1803_data *data = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + *vals = data->cfg->avail; + *length = ARRAY_SIZE(data->cfg->avail); + *type = IIO_VAL_INT; + return IIO_AVAIL_RANGE; + } + return -EINVAL; +} + static const struct iio_info ds1803_info = { .read_raw = ds1803_read_raw, .write_raw = ds1803_write_raw, + .read_avail = ds1803_read_avail, }; static int ds1803_probe(struct i2c_client *client, const struct i2c_device_id *id)