From patchwork Mon Jul 5 07:14:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Ardelean X-Patchwork-Id: 12358359 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 470B9C07E98 for ; Mon, 5 Jul 2021 07:15:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2172A613CB for ; Mon, 5 Jul 2021 07:15:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229950AbhGEHRr (ORCPT ); Mon, 5 Jul 2021 03:17:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39276 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229907AbhGEHRq (ORCPT ); Mon, 5 Jul 2021 03:17:46 -0400 Received: from mail-ej1-x629.google.com (mail-ej1-x629.google.com [IPv6:2a00:1450:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 55B0BC061760 for ; Mon, 5 Jul 2021 00:15:10 -0700 (PDT) Received: by mail-ej1-x629.google.com with SMTP id gn32so27720286ejc.2 for ; Mon, 05 Jul 2021 00:15:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=deviqon.com; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=9ykkqmppWnyrslZWxdlWEu20g35sW6pBGKuevoDuJtE=; b=UUaCkbZyLKctdNEs96AGfrx0lVlXJ2vW1OfUs4K3VibMRD7JyshiaVi+/gp5ECkqRZ R8jES1wRnq9pKAyfQMK7AtUY3QP0gEf0AVDEiS0cXwgQrZ4LUgCv0caFrO26YNeUYIgi XHDTkxvDSdrsOvJVxFhAspsYtZVmvTLn9aiiQGUi2676TpQ3ExdDvD5BD8uf+BWN4k0L szUGfZOE/oAh10F4K9rQdiSh6f0kbnIqWIQZ3om6NXXkhoOyP5ufrzgCHx0X/XlGVtLD 5Yrts4dWvA4WeuKcSABOU19BHaUDR+nmSN+wthysbaarHZoTSex9ZUYtAmO5fwhsJQk9 GF+Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=9ykkqmppWnyrslZWxdlWEu20g35sW6pBGKuevoDuJtE=; b=tzcXBMNFqPqhjb3vJnkBfvjjOu/Ll86W523Gw+h6MOUJByVbuABZVhhKh+lezOyhH8 wH1YsRbCxxm4oR2lzOBlakwl4m057k+f/YAnSLGsORYcjrWvkpZHWDwofbyo+xu2eLAx EVb+txtosaxb8jI4vLECOmaQPNUPAFYsbjdKgI0Tk3EvaXMVVbn3bSFkGN5Lp2TsGKI0 9VPzB2rqFyhzL7zl3sk/7OO5oTAy0ZOuuB7kuvF9tVGYHBQqe4ytWBGSZjsB7R8Cm3IK Pnz+AdSurNVOkCbYm8Gnr8+BKRxuY8G/mr8mg+Ud0anapS5Pclqv377jdL92NGlPyUBp xsaw== X-Gm-Message-State: AOAM532F5q+BlzKCWaFdtlkpMNrzuXP/IeGu7F67yjBv0Kh0hBY8PEjJ RB7/+RIkoBFKVZoDlhhxlpdYWlKajmzheEPY X-Google-Smtp-Source: ABdhPJxz/16L2ufkgqfkMVdBuWiZ1CyZN9q/L++yakSFkA9g9URIAlBLI7o3S8S4Z6uMpL1PRW0tgg== X-Received: by 2002:a17:906:36d5:: with SMTP id b21mr11994516ejc.258.1625469308728; Mon, 05 Jul 2021 00:15:08 -0700 (PDT) Received: from neptune.. ([5.2.193.191]) by smtp.gmail.com with ESMTPSA id n22sm3973823eje.3.2021.07.05.00.15.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Jul 2021 00:15:07 -0700 (PDT) From: Alexandru Ardelean To: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Cc: jic23@kernel.org, Alexandru Ardelean Subject: [PATCH v2 1/2] iio: light: adjd_s311: move buffer on adjd_s311_data object Date: Mon, 5 Jul 2021 10:14:55 +0300 Message-Id: <20210705071456.649659-1-aardelean@deviqon.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org This change moves the entire buffer on the private adjd_s311_data type. Since the device has 4 channels, it's not a big waste to just allocate the maximum possible buffer and use only what's needed. This is in contrast with free-ing and re-allocating the buffer on the update_scan_mode hook. Since the driver pushes buffer data with iio_push_to_buffers_with_timestamp(), the buffer must also include a 64-bit buffer for the timestamp, for each sample-set. With this change, the adjd_s311_update_scan_mode() is no longer needed. Signed-off-by: Alexandru Ardelean --- Changelog v1 -> v2: * https://patchwork.kernel.org/project/linux-iio/patch/20210628135132.73682-1-aardelean@deviqon.com/ * split into 2 patches: - first patch move the buffer on the adjd_s311_data object (i.e. this patch) - second patch to do the conversion to devm_ functions drivers/iio/light/adjd_s311.c | 25 ++++++------------------- 1 file changed, 6 insertions(+), 19 deletions(-) diff --git a/drivers/iio/light/adjd_s311.c b/drivers/iio/light/adjd_s311.c index 17dac8d0e11d..caf852554897 100644 --- a/drivers/iio/light/adjd_s311.c +++ b/drivers/iio/light/adjd_s311.c @@ -54,7 +54,10 @@ struct adjd_s311_data { struct i2c_client *client; - u16 *buffer; + struct { + s16 chans[4]; + s64 ts __aligned(8); + } scan; }; enum adjd_s311_channel_idx { @@ -129,10 +132,10 @@ static irqreturn_t adjd_s311_trigger_handler(int irq, void *p) if (ret < 0) goto done; - data->buffer[j++] = ret & ADJD_S311_DATA_MASK; + data->scan.chans[j++] = ret & ADJD_S311_DATA_MASK; } - iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, time_ns); + iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, time_ns); done: iio_trigger_notify_done(indio_dev->trig); @@ -225,23 +228,9 @@ static int adjd_s311_write_raw(struct iio_dev *indio_dev, return -EINVAL; } -static int adjd_s311_update_scan_mode(struct iio_dev *indio_dev, - const unsigned long *scan_mask) -{ - struct adjd_s311_data *data = iio_priv(indio_dev); - - kfree(data->buffer); - data->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); - if (data->buffer == NULL) - return -ENOMEM; - - return 0; -} - static const struct iio_info adjd_s311_info = { .read_raw = adjd_s311_read_raw, .write_raw = adjd_s311_write_raw, - .update_scan_mode = adjd_s311_update_scan_mode, }; static int adjd_s311_probe(struct i2c_client *client, @@ -286,11 +275,9 @@ static int adjd_s311_probe(struct i2c_client *client, static int adjd_s311_remove(struct i2c_client *client) { struct iio_dev *indio_dev = i2c_get_clientdata(client); - struct adjd_s311_data *data = iio_priv(indio_dev); iio_device_unregister(indio_dev); iio_triggered_buffer_cleanup(indio_dev); - kfree(data->buffer); return 0; }