From patchwork Tue Jul 5 19:03:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Morgan X-Patchwork-Id: 12906953 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 8109ECCA486 for ; Tue, 5 Jul 2022 19:04:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233193AbiGETEJ (ORCPT ); Tue, 5 Jul 2022 15:04:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233187AbiGETEH (ORCPT ); Tue, 5 Jul 2022 15:04:07 -0400 Received: from mail-io1-xd32.google.com (mail-io1-xd32.google.com [IPv6:2607:f8b0:4864:20::d32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CCD42201B1; Tue, 5 Jul 2022 12:04:04 -0700 (PDT) Received: by mail-io1-xd32.google.com with SMTP id l24so12001449ion.13; Tue, 05 Jul 2022 12:04:04 -0700 (PDT) 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 :mime-version:content-transfer-encoding; bh=lBoAduiOY3dTG1kjtzuuO2xA8vXJSUeY7/uBXp/jxVc=; b=peuQZQF4D+5LgZxEzu9M9xhXv9pEUthYyEY5UwjphfRdsw/ghYG7P4qTOLQFrb7GL8 2TGq/YL55wGe1zH1giVdtJ34VlTMoSPM3DSDPYYSuZNqNJEl1EPvr4NuSawWUJWnGEeR 8ODM22c853V6/War/ReZ1GGklutM1BITIHP0uKxqiP8smRud+8I3CpQxzFnUuiGdBhXc VL3iKJ42V0S+qDkzqPF066ZCJFHHJepBQw5hxZUHbK5yQI/OZ3ooCf9EVPAPKdbvRjMr yKsT9cvhf+A4oO3BT6zOVMOTMNHMFm/Weu2ud45WZPCKLp6lfYkAxFZgdVJ3V7e7sy0p /QFg== 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:mime-version:content-transfer-encoding; bh=lBoAduiOY3dTG1kjtzuuO2xA8vXJSUeY7/uBXp/jxVc=; b=5t1s+c4lPGUH3O8+/9X9HYT/xFU4ajljtLJhpvs0f0CGJqTZ6MhZTy1YFMxl76B6Lt JtId/dbAAT3nz6kQFxbkrZj2WioOx1rxYlv9YMds1Oveb6Bbcqr/SVcsPe5aqk7D61My 95nD+qn7tzvpt+jyZUh1G/3855qsetkGEbxTd9on328frkz7ujj/4xhx6jYn14pCNTUF mvtWfOYTtp1WR4JEP93p42nNVtPPT3NPNn0PE/w/D3L/XVtoqJsaWj4/fcjRFRTrn7Ro I0KLM9QyqyfSmFp1DzNgrgmPx7aiwmxfhTnTyc6PE5Nn79UBDmx1FHdLgmUtEKGIF10d CIHA== X-Gm-Message-State: AJIora+NiIwdhDkO4sfR1kZ6mgQQnQK4sTmODVb+ZL8xjQkwz0w17JJn fMajp1XJx9456mJMH49JZKjKntAiOlQ= X-Google-Smtp-Source: AGRyM1uVaTNH6OA/7IqEsGDU2r4z3CJ879Ru/r55x9DwqxBa8O8i9zkHF/kctqNKKdgdePdN3cwmYg== X-Received: by 2002:a05:6638:2596:b0:33e:e4e3:ce9 with SMTP id s22-20020a056638259600b0033ee4e30ce9mr4650798jat.16.1657047843973; Tue, 05 Jul 2022 12:04:03 -0700 (PDT) Received: from Dixie.. ([2604:2d80:a188:fd00:a8dc:16da:96d1:2d19]) by smtp.gmail.com with ESMTPSA id d93-20020a0285e6000000b0033efe01c20esm397762jai.42.2022.07.05.12.04.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 Jul 2022 12:04:03 -0700 (PDT) From: Chris Morgan X-Google-Original-From: Chris Morgan To: linux-input@vger.kernel.org Cc: devicetree@vger.kernel.org, contact@artur-rojek.eu, maccraft123mc@gmail.com, heiko@sntech.de, krzysztof.kozlowski+dt@linaro.org, robh+dt@kernel.org, dmitry.torokhov@gmail.com, paul@crapouillou.net, jic23@kernel.org, linux-iio@vger.kernel.org, Chris Morgan , Chris Morgan Subject: [PATCH v7 2/3] Input: adc-joystick - Add polled input device support Date: Tue, 5 Jul 2022 14:03:53 -0500 Message-Id: <20220705190354.69263-3-macromorgan@hotmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220705190354.69263-1-macromorgan@hotmail.com> References: <20220705190354.69263-1-macromorgan@hotmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org From: Chris Morgan Add polled input device support to the adc-joystick driver. This is useful for devices which do not have hardware capable triggers on their SARADC. Code modified from adc-joystick.c changes made by Maya Matuszczyk. Signed-off-by: Maya Matuszczyk Signed-off-by: Chris Morgan Acked-by: Artur Rojek --- drivers/input/joystick/adc-joystick.c | 51 +++++++++++++++++++++------ 1 file changed, 40 insertions(+), 11 deletions(-) diff --git a/drivers/input/joystick/adc-joystick.c b/drivers/input/joystick/adc-joystick.c index 78ebca7d400a..2f4bd12d6344 100644 --- a/drivers/input/joystick/adc-joystick.c +++ b/drivers/input/joystick/adc-joystick.c @@ -26,8 +26,23 @@ struct adc_joystick { struct adc_joystick_axis *axes; struct iio_channel *chans; int num_chans; + bool polled; }; +static void adc_joystick_poll(struct input_dev *input) +{ + struct adc_joystick *joy = input_get_drvdata(input); + int i, val, ret; + + for (i = 0; i < joy->num_chans; i++) { + ret = iio_read_channel_raw(&joy->chans[i], &val); + if (ret < 0) + return; + input_report_abs(input, joy->axes[i].code, val); + } + input_sync(input); +} + static int adc_joystick_handle(const void *data, void *private) { struct adc_joystick *joy = private; @@ -179,6 +194,7 @@ static int adc_joystick_probe(struct platform_device *pdev) int error; int bits; int i; + unsigned int poll_interval; joy = devm_kzalloc(dev, sizeof(*joy), GFP_KERNEL); if (!joy) @@ -215,8 +231,17 @@ static int adc_joystick_probe(struct platform_device *pdev) joy->input = input; input->name = pdev->name; input->id.bustype = BUS_HOST; - input->open = adc_joystick_open; - input->close = adc_joystick_close; + + joy->polled = !device_property_read_u32(dev, "poll-interval", + &poll_interval); + + if (joy->polled) { + input_setup_polling(input, adc_joystick_poll); + input_set_poll_interval(input, poll_interval); + } else { + input->open = adc_joystick_open; + input->close = adc_joystick_close; + } error = adc_joystick_set_axes(dev, joy); if (error) @@ -229,16 +254,20 @@ static int adc_joystick_probe(struct platform_device *pdev) return error; } - joy->buffer = iio_channel_get_all_cb(dev, adc_joystick_handle, joy); - if (IS_ERR(joy->buffer)) { - dev_err(dev, "Unable to allocate callback buffer\n"); - return PTR_ERR(joy->buffer); - } + if (!joy->polled) { + joy->buffer = iio_channel_get_all_cb(dev, adc_joystick_handle, + joy); + if (IS_ERR(joy->buffer)) { + dev_err(dev, "Unable to allocate callback buffer\n"); + return PTR_ERR(joy->buffer); + } - error = devm_add_action_or_reset(dev, adc_joystick_cleanup, joy->buffer); - if (error) { - dev_err(dev, "Unable to add action\n"); - return error; + error = devm_add_action_or_reset(dev, adc_joystick_cleanup, + joy->buffer); + if (error) { + dev_err(dev, "Unable to add action\n"); + return error; + } } return 0;