From patchwork Tue May 18 15:09:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 442846 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,DKIM_INVALID, DKIM_SIGNED,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 BBF04C433B4 for ; Tue, 18 May 2021 15:09:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A0FA761261 for ; Tue, 18 May 2021 15:09:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350036AbhERPLN (ORCPT ); Tue, 18 May 2021 11:11:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:49496 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345055AbhERPKh (ORCPT ); Tue, 18 May 2021 11:10:37 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 6F6C1613B5; Tue, 18 May 2021 15:09:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1621350550; bh=3crpsUukJiwOrmYoQySDsb9Gg2iiXjFUvVuCwAECZfw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ND+HmJkIOBv/3v4uWcAy+U/+zYYO5wypLavi4OJxHUAZ2s3/xeTiO0JsKIT/UDA+U fB9hHWo0t6gHMSld1Ex4kGFCBUUgXPtltHpl/cl1S/Bn1STNIIzW+DVinoBh7Q/17e 0N+gXzuqNgMVQQ+2/zUmf7TUQCTFYWlTtDNu/fMQUYATNj/WYPxlFo5hrfxgfqOqtu yzbTWIPkA06V94opowwU1mHCKpvqBfWGzAW44Mbk4cd2gAPMneufvVvNP/o62ldynN JcHmWDwpotSWEBv2D0QNXVXZ2i9WKjREYlmC3szXREJoLgso5n5flv4biKCc+jX6zg 0m55NBCfZNG7Q== Received: by mail.kernel.org with local (Exim 4.94.2) (envelope-from ) id 1lj1LI-007HP0-Nd; Tue, 18 May 2021 17:09:08 +0200 From: Mauro Carvalho Chehab Cc: linuxarm@huawei.com, mauro.chehab@huawei.com, Mauro Carvalho Chehab , Pavel Machek , gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org Subject: [PATCH v2 17/17] leds: leds-nuc: add support for changing the power limit scheme Date: Tue, 18 May 2021 17:09:06 +0200 Message-Id: X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Sender: Mauro Carvalho Chehab To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org The power limit indicator may have 2 behaviors: 1. Its color gradually changes from green to red; 2. It displays a single color Add support for it. Signed-off-by: Mauro Carvalho Chehab --- drivers/leds/leds-nuc.c | 93 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 93 insertions(+) diff --git a/drivers/leds/leds-nuc.c b/drivers/leds/leds-nuc.c index f84ec5662f5c..c320a7e4c796 100644 --- a/drivers/leds/leds-nuc.c +++ b/drivers/leds/leds-nuc.c @@ -1767,6 +1767,8 @@ static ssize_t store_ethernet_type(struct device *dev, if (!nuc_wmi_test_control(dev, led, ctrl)) return -ENODEV; + tmp = strsep((char **)&buf, "\n"); + for (val = 0; val < ARRAY_SIZE(ethernet_type); val++) if (!strcasecmp(tmp, ethernet_type[val])) break; @@ -1786,12 +1788,102 @@ static ssize_t store_ethernet_type(struct device *dev, return len; } +/* Power Limit Indication scheme */ +static const char * const power_limit_scheme[] = { + "green to red", + "single color" +}; + +static ssize_t show_power_limit_scheme(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct led_classdev *cdev = dev_get_drvdata(dev); + struct nuc_nmi_led *led = container_of(cdev, struct nuc_nmi_led, cdev); + u8 input[NUM_INPUT_ARGS] = { 0 }; + u8 output[NUM_OUTPUT_ARGS]; + int ctrl, ret, val, i, n; + int size = PAGE_SIZE; + char *p = buf; + + if (led->indicator != LED_IND_POWER_LIMIT) + return -EINVAL; + + ctrl = led->reg_table[led->indicator][LED_FUNC_POWER_STATE_NUM_CTRLS]; + + if (!nuc_wmi_test_control(dev, led, ctrl)) + return -ENODEV; + + input[0] = LED_NEW_GET_CONTROL_ITEM; + input[1] = led->id; + input[2] = led->indicator; + input[3] = ctrl; + + ret = nuc_nmi_cmd(dev, LED_NEW_GET_STATUS, input, output); + if (ret) + return ret; + + val = output[0]; + + for (i = 0; i < ARRAY_SIZE(power_limit_scheme); i++) { + if (i == val) + n = scnprintf(p, size, "[%s] ", power_limit_scheme[i]); + else + n = scnprintf(p, size, "%s ", power_limit_scheme[i]); + p += n; + size -= n; + } + size -= scnprintf(p, size, "\n"); + + return PAGE_SIZE - size; +} + +static ssize_t store_power_limit_scheme(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct led_classdev *cdev = dev_get_drvdata(dev); + struct nuc_nmi_led *led = container_of(cdev, struct nuc_nmi_led, cdev); + u8 input[NUM_INPUT_ARGS] = { 0 }; + int ctrl, val, ret; + const char *tmp; + + if (led->indicator != LED_IND_POWER_LIMIT) + return -EINVAL; + + ctrl = led->reg_table[led->indicator][LED_FUNC_POWER_STATE_NUM_CTRLS]; + + if (!nuc_wmi_test_control(dev, led, ctrl)) + return -ENODEV; + + tmp = strsep((char **)&buf, "\n"); + + for (val = 0; val < ARRAY_SIZE(power_limit_scheme); val++) + if (!strcasecmp(tmp, power_limit_scheme[val])) + break; + + if (val >= ARRAY_SIZE(power_limit_scheme)) + return -EINVAL; + + input[0] = led->id; + input[1] = led->indicator; + input[2] = ctrl; + input[3] = val; + + ret = nuc_nmi_cmd(dev, LED_SET_VALUE, input, NULL); + if (ret) + return ret; + + return len; +} + static LED_ATTR_RW(indicator); static LED_ATTR_RW(color); static LED_ATTR_RW(blink_behavior); static LED_ATTR_RW(blink_frequency); static LED_ATTR_RW(hdd_default); static LED_ATTR_RW(ethernet_type); +static LED_ATTR_RW(power_limit_scheme); LED_ATTR_POWER_STATE_RW(s0_brightness, brightness, 0); LED_ATTR_POWER_STATE_RW(s0_blink_behavior, blink_behavior, 0); @@ -1821,6 +1913,7 @@ static struct attribute *nuc_wmi_led_attr[] = { &dev_attr_indicator.attr, &dev_attr_hdd_default.attr, &dev_attr_ethernet_type.attr, + &dev_attr_power_limit_scheme.attr, NULL, };