From patchwork Wed Nov 1 14:24:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Rokosov X-Patchwork-Id: 740280 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 8D6FBC4332F for ; Wed, 1 Nov 2023 14:25:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233984AbjKAOZG (ORCPT ); Wed, 1 Nov 2023 10:25:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54998 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233772AbjKAOZF (ORCPT ); Wed, 1 Nov 2023 10:25:05 -0400 Received: from mx1.sberdevices.ru (mx1.sberdevices.ru [37.18.73.165]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B5479DC; Wed, 1 Nov 2023 07:24:58 -0700 (PDT) Received: from p-infra-ksmg-sc-msk01 (localhost [127.0.0.1]) by mx1.sberdevices.ru (Postfix) with ESMTP id B409C100006; Wed, 1 Nov 2023 17:24:56 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.sberdevices.ru B409C100006 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=salutedevices.com; s=mail; t=1698848696; bh=FhktaFkbGHjtccjnmuidDnZiLgQ3GmfFVrHWAf0/zKc=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:From; b=FSDV4DcGMIliSRh/YfA9la+qGb2PYpjr3JfOsB0hSqeuXbpazE9pzgWFHasPqenB1 gn1SQTF5MlR3QmHqV/HCBTMhq40i32/GtUZI/zoJcow+iccIQf6bxnoCUbl+69Y4J/ GPJy9CQf2MF/JEcWJpIfJmdluUcYi62r6VA7KZ+I4KiFfor42kH83T9j37ucX9xzh9 YDMczGXOTmXk5bQSoQm95BkigYkEhITsSLMq7prQcBqb8fFkmq9rliDzvynNXdFFyb RctM8WC/6zvV0DHv6sJO+gdP6t0VHe691ysaINbDxSX1z24jQSSVoRLpr6vjRxk+H6 O0/bNhm0Zoskg== Received: from p-i-exch-sc-m01.sberdevices.ru (p-i-exch-sc-m01.sberdevices.ru [172.16.192.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.sberdevices.ru (Postfix) with ESMTPS; Wed, 1 Nov 2023 17:24:56 +0300 (MSK) Received: from localhost.localdomain (100.64.160.123) by p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.37; Wed, 1 Nov 2023 17:24:56 +0300 From: Dmitry Rokosov To: , , , , , CC: , , , , , Dmitry Rokosov Subject: [PATCH v3 02/11] leds: aw200xx: support HWEN hardware control Date: Wed, 1 Nov 2023 17:24:36 +0300 Message-ID: <20231101142445.8753-3-ddrokosov@salutedevices.com> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20231101142445.8753-1-ddrokosov@salutedevices.com> References: <20231101142445.8753-1-ddrokosov@salutedevices.com> MIME-Version: 1.0 X-Originating-IP: [100.64.160.123] X-ClientProxiedBy: p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) To p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) X-KSMG-Rule-ID: 10 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Lua-Profiles: 181053 [Nov 01 2023] X-KSMG-AntiSpam-Version: 6.0.0.2 X-KSMG-AntiSpam-Envelope-From: ddrokosov@salutedevices.com X-KSMG-AntiSpam-Rate: 0 X-KSMG-AntiSpam-Status: not_detected X-KSMG-AntiSpam-Method: none X-KSMG-AntiSpam-Auth: dkim=none X-KSMG-AntiSpam-Info: LuaCore: 543 543 1e3516af5cdd92079dfeb0e292c8747a62cb1ee4, {Tracking_from_domain_doesnt_match_to}, 127.0.0.199:7.1.2; salutedevices.com:7.1.1; p-i-exch-sc-m01.sberdevices.ru:5.0.1,7.1.1; d41d8cd98f00b204e9800998ecf8427e.com:7.1.1; 100.64.160.123:7.1.2, FromAlignment: s, ApMailHostAddress: 100.64.160.123 X-MS-Exchange-Organization-SCL: -1 X-KSMG-AntiSpam-Interceptor-Info: scan successful X-KSMG-AntiPhishing: Clean X-KSMG-LinksScanning: Clean X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 2.0.1.6960, bases: 2023/11/01 13:00:00 #22378131 X-KSMG-AntiVirus-Status: Clean, skipped Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org HWEN is hardware control, which is used for enable/disable aw200xx chip. It's high active, internally pulled down to GND. After HWEN pin set high the chip begins to load the OTP information, which takes 200us to complete. About 200us wait time is needed for internal oscillator startup and display SRAM initialization. After display SRAM initialization, the registers in page 1 to page 5 can be configured via i2c interface. Signed-off-by: Dmitry Rokosov --- drivers/leds/leds-aw200xx.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/drivers/leds/leds-aw200xx.c b/drivers/leds/leds-aw200xx.c index 842a22087b16..7762b3a132ac 100644 --- a/drivers/leds/leds-aw200xx.c +++ b/drivers/leds/leds-aw200xx.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -116,6 +117,7 @@ struct aw200xx { struct mutex mutex; u32 num_leds; u32 display_rows; + struct gpio_desc *hwen; struct aw200xx_led leds[] __counted_by(num_leds); }; @@ -358,6 +360,25 @@ static int aw200xx_chip_check(const struct aw200xx *const chip) return 0; } +static void aw200xx_enable(const struct aw200xx *const chip) +{ + gpiod_set_value_cansleep(chip->hwen, 1); + + /* + * After HWEN pin set high the chip begins to load the OTP information, + * which takes 200us to complete. About 200us wait time is needed for + * internal oscillator startup and display SRAM initialization. After + * display SRAM initialization, the registers in page1 to page5 can be + * configured via i2c interface. + */ + fsleep(400); +} + +static void aw200xx_disable(const struct aw200xx *const chip) +{ + return gpiod_set_value_cansleep(chip->hwen, 0); +} + static int aw200xx_probe_fw(struct device *dev, struct aw200xx *chip) { struct fwnode_handle *child; @@ -517,6 +538,14 @@ static int aw200xx_probe(struct i2c_client *client) if (IS_ERR(chip->regmap)) return PTR_ERR(chip->regmap); + chip->hwen = devm_gpiod_get_optional(&client->dev, "enable", + GPIOD_OUT_HIGH); + if (IS_ERR(chip->hwen)) + return dev_err_probe(&client->dev, PTR_ERR(chip->hwen), + "Cannot get enable gpio"); + + aw200xx_enable(chip); + ret = aw200xx_chip_check(chip); if (ret) return ret; @@ -537,6 +566,9 @@ static int aw200xx_probe(struct i2c_client *client) ret = aw200xx_chip_init(chip); out_unlock: + if (ret) + aw200xx_disable(chip); + mutex_unlock(&chip->mutex); return ret; } @@ -546,6 +578,7 @@ static void aw200xx_remove(struct i2c_client *client) struct aw200xx *chip = i2c_get_clientdata(client); aw200xx_chip_reset(chip); + aw200xx_disable(chip); mutex_destroy(&chip->mutex); }