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=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 8A572C4363A for ; Thu, 6 Aug 2020 11:04:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7519722CAE for ; Thu, 6 Aug 2020 11:04:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="a3YFdVFv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728262AbgHFGiF (ORCPT ); Thu, 6 Aug 2020 02:38:05 -0400 Received: from m12-15.163.com ([220.181.12.15]:33391 "EHLO m12-15.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726051AbgHFGiE (ORCPT ); Thu, 6 Aug 2020 02:38:04 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id; bh=PtRFGMacX+QscZqfbZ +Lu5FxPAgj+Rd4K44h0HnDPoQ=; b=a3YFdVFvhVRmHICzbfsIWhBZQD/rgvhTWF QqabZ3we7Z8X5pN69cI6TvMH1VIjmZR24IqQUE1PQZ6UUsGIgQVv/D8llXC6y/zg PcYOV6m9LG0jEZU2WJ5hxBgFM89l2A2GItkWczwvO75skBqUglVeD0sJvnjbohyj fEJhsVyNM= Received: from localhost.localdomain (unknown [58.33.126.62]) by smtp11 (Coremail) with SMTP id D8CowADnbcp1oStf0rT5EQ--.55997S2; Thu, 06 Aug 2020 14:21:45 +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 1/2] leds: is31fl319x: Add sdb pin and generate a 5ms low pulse when startup Date: Thu, 6 Aug 2020 14:21:29 +0800 Message-Id: <20200806062130.25187-1-von81@163.com> X-Mailer: git-send-email 2.17.1 X-CM-TRANSID: D8CowADnbcp1oStf0rT5EQ--.55997S2 X-Coremail-Antispam: 1Uf129KBjvJXoW7AF17try8JrWDGr18ur48WFg_yoW8GF4UpF 1DCFyrZFW3J3y2g3WfZFW7u345ta18KrZrJrWxXa4Sv3WkK3Wvga4ktFnIvF13XFWxuay5 ZanxtFW8Gr4vyw7anT9S1TB71UUUUUDqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07j73kZUUUUU= X-Originating-IP: [58.33.126.62] X-CM-SenderInfo: xyrqmii6rwjhhfrp/1tbiRBp4OlSIgamPWgAAs9 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/leds/leds-is31fl319x.c b/drivers/leds/leds-is31fl319x.c index ca6634b8683c..b4f70002cec9 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_pin; struct regmap *regmap; struct mutex lock; u32 audio_gain_db; @@ -265,6 +268,15 @@ static int is31fl319x_parse_dt(struct device *dev, is31->audio_gain_db = min(is31->audio_gain_db, IS31FL319X_AUDIO_GAIN_DB_MAX); + is31->sdb_pin = gpiod_get(dev, "sdb", GPIOD_ASIS); + if (IS_ERR(is31->sdb_pin)) { + dev_warn(dev, "failed to get gpio_sdb, try default\r\n"); + } else { + gpiod_direction_output(is31->sdb_pin, 0); + mdelay(5); + gpiod_direction_output(is31->sdb_pin, 1); + } + return 0; put_child_node: -- 2.17.1