From patchwork Sat Jan 9 23:11:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandre Belloni X-Patchwork-Id: 12008791 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 40660C433E9 for ; Sat, 9 Jan 2021 23:14:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0FA4223975 for ; Sat, 9 Jan 2021 23:14:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726488AbhAIXNZ (ORCPT ); Sat, 9 Jan 2021 18:13:25 -0500 Received: from relay8-d.mail.gandi.net ([217.70.183.201]:45993 "EHLO relay8-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726454AbhAIXNY (ORCPT ); Sat, 9 Jan 2021 18:13:24 -0500 X-Originating-IP: 86.202.109.140 Received: from localhost (lfbn-lyo-1-13-140.w86-202.abo.wanadoo.fr [86.202.109.140]) (Authenticated sender: alexandre.belloni@bootlin.com) by relay8-d.mail.gandi.net (Postfix) with ESMTPSA id C74031BF204; Sat, 9 Jan 2021 23:12:41 +0000 (UTC) From: Alexandre Belloni To: Jonathan Cameron Cc: Lars-Peter Clausen , Peter Meerwald-Stadler , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Alexandre Belloni Subject: [PATCH v2 3/6] iio:pressure:ms5637: limit available sample frequencies Date: Sun, 10 Jan 2021 00:11:45 +0100 Message-Id: <20210109231148.1168104-4-alexandre.belloni@bootlin.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210109231148.1168104-1-alexandre.belloni@bootlin.com> References: <20210109231148.1168104-1-alexandre.belloni@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Avoid exposing all the sampling frequencies for chip that only support a subset. Signed-off-by: Alexandre Belloni --- Changes in v2: -use sysfs_emit_at drivers/iio/pressure/ms5637.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/iio/pressure/ms5637.c b/drivers/iio/pressure/ms5637.c index fdd557ac71a3..0a6034342714 100644 --- a/drivers/iio/pressure/ms5637.c +++ b/drivers/iio/pressure/ms5637.c @@ -36,8 +36,19 @@ struct ms_tp_data { }; static const int ms5637_samp_freq[6] = { 960, 480, 240, 120, 60, 30 }; -/* String copy of the above const for readability purpose */ -static const char ms5637_show_samp_freq[] = "960 480 240 120 60 30"; + +static ssize_t ms5637_show_samp_freq(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct ms_tp_dev *dev_data = iio_priv(indio_dev); + int i, len = 0; + + for (i = 0; i <= dev_data->hw->max_res_index; i++) + len += sysfs_emit_at(buf, len, "%u ", ms5637_samp_freq[i]); + sysfs_emit_at(buf, len - 1, "\n"); + + return len; +} static int ms5637_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *channel, int *val, @@ -114,10 +125,10 @@ static const struct iio_chan_spec ms5637_channels[] = { } }; -static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(ms5637_show_samp_freq); +static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(ms5637_show_samp_freq); static struct attribute *ms5637_attributes[] = { - &iio_const_attr_sampling_frequency_available.dev_attr.attr, + &iio_dev_attr_sampling_frequency_available.dev_attr.attr, NULL, };