From mboxrd@z Thu Jan 1 00:00:00 1970 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=-13.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 17176C433E0 for ; Sat, 8 Aug 2020 03:38:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E45AC221E5 for ; Sat, 8 Aug 2020 03:38:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="VJ1FFaBK" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726511AbgHHDi3 (ORCPT ); Fri, 7 Aug 2020 23:38:29 -0400 Received: from m12-15.163.com ([220.181.12.15]:54471 "EHLO m12-15.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726200AbgHHDi3 (ORCPT ); Fri, 7 Aug 2020 23:38:29 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id; bh=oSfvozyc7WeaEkyabb NkYFvPW4VQ5CKtVaQR9O+77CY=; b=VJ1FFaBKZnj1W+uBi8gA6LW1mhKDXJIFO2 vGRL+PdRBW+SuyaiVjHU/fxcMBSmO1QkQAgRHxZEPzGPr0LUKdjrbaK1EHAloN6G EwvZJGqZn1GD7dEuvR9XR7cIHL8P8hW5DSXwGc+Txc/d47EEZhtYG5CugKtaOzje 5XSSx4MjI= Received: from localhost.localdomain (unknown [58.33.126.62]) by smtp11 (Coremail) with SMTP id D8CowACnoqoHHi5fN_NeEw--.35350S2; Sat, 08 Aug 2020 11:37:48 +0800 (CST) From: Grant Feng To: von81@163.com, jacek.anaszewski@gmail.com, pavel@ucw.cz, dmurphy@ti.com, robh+dt@kernel.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/2] leds: is31fl319x: Add sdb pin and generate a 5ms low pulse when startup Date: Sat, 8 Aug 2020 11:37:30 +0800 Message-Id: <20200808033731.15695-1-von81@163.com> X-Mailer: git-send-email 2.17.1 X-CM-TRANSID: D8CowACnoqoHHi5fN_NeEw--.35350S2 X-Coremail-Antispam: 1Uf129KBjvJXoW7AF17try5XFWUArW5AF4xZwb_yoW8AFyxpF 1qkFyFyFW3Jry7Kw12vFy7Za45t3W8tF4DArWxWayS93WvgFnagFyvvFnFv3ZxXFW8uFW5 JwsIyFW8Gr48ZrJanT9S1TB71UUUUUDqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07jOAwsUUUUU= X-Originating-IP: [58.33.126.62] X-CM-SenderInfo: xyrqmii6rwjhhfrp/1tbiUQx6OlWBQVR0fwAAsX Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org generate a 5ms low pulse on sdb pin when startup, then the chip becomes more stable in the complex EM environment. Signed-off-by: Grant Feng --- drivers/leds/leds-is31fl319x.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/leds/leds-is31fl319x.c b/drivers/leds/leds-is31fl319x.c index ca6634b8683c..5c499a5895e0 100644 --- a/drivers/leds/leds-is31fl319x.c +++ b/drivers/leds/leds-is31fl319x.c @@ -16,6 +16,8 @@ #include #include #include +#include +#include /* register numbers */ #define IS31FL319X_SHUTDOWN 0x00 @@ -61,6 +63,7 @@ struct is31fl319x_chip { const struct is31fl319x_chipdef *cdef; struct i2c_client *client; + struct gpio_desc *sdb_gpio; struct regmap *regmap; struct mutex lock; u32 audio_gain_db; @@ -207,6 +210,15 @@ static int is31fl319x_parse_dt(struct device *dev, if (!np) return -ENODEV; + is31->sdb_gpio = devm_gpiod_get_optional(dev, + "sdb", + GPIOD_OUT_HIGH); + if (IS_ERR(is31->sdb_gpio)) { + ret = PTR_ERR(is31->sdb_gpio); + dev_err(dev, "Failed to get sdb gpio: %d\n", ret); + return ret; + } + of_dev_id = of_match_device(of_is31fl319x_match, dev); if (!of_dev_id) { dev_err(dev, "Failed to match device with supported chips\n"); @@ -350,6 +362,12 @@ static int is31fl319x_probe(struct i2c_client *client, if (err) goto free_mutex; + if (is31->sdb_gpio) { + gpiod_direction_output(is31->sdb_gpio, 0); + mdelay(5); + gpiod_direction_output(is31->sdb_gpio, 1); + } + is31->client = client; is31->regmap = devm_regmap_init_i2c(client, ®map_config); if (IS_ERR(is31->regmap)) { -- 2.17.1