From patchwork Sun Aug 16 21:14:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff LaBundy X-Patchwork-Id: 11716221 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4F670739 for ; Sun, 16 Aug 2020 21:15:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 31D7920829 for ; Sun, 16 Aug 2020 21:15:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=NETORG5796793.onmicrosoft.com header.i=@NETORG5796793.onmicrosoft.com header.b="jlqzPD16" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729121AbgHPVPY (ORCPT ); Sun, 16 Aug 2020 17:15:24 -0400 Received: from mail-dm6nam10on2076.outbound.protection.outlook.com ([40.107.93.76]:55009 "EHLO NAM10-DM6-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726331AbgHPVPW (ORCPT ); Sun, 16 Aug 2020 17:15:22 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=a8/X5pZbz6SWIX5JoN1ejJTQl0ChaA4TGsSxiTYoNh8iWOWOjo56FjIYSi5fxVlJ2bt70SPWtDfklDvZzkCfjxfBirNEsMjfKCU6hES3rfRSuPMGxnRAxWxERd59KVFWRcCm/D8upCBvFlttnLECow/hy9kYMMKKfULhJhkyEHwW7TYddyyZsOrGwtTr5fzTugbxZ75tPcQEQz1URoXb8yAMg0NE/4uoi60beShIN1OpSZGuMlEyHV6shR0JWWc6MShi1bbEax7hCbFUiiWi0zJBeOcUkqik5ZoQ02VJY00ezCwZkQUYo0qcTLRP6z7/mPiuOUYy22udPLFWf5BHNw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=lPfxuwLTmK+GkStKq+86hSwgk8J+FX39rElhUysleFA=; b=HkTCrk1hb+bDD23HkHBqao51ZscLbsnULI13w1VrQUgy793wI0I3DoEfrufFb1VxlfvkUvbzz24AGf9PnXJwYYedO/XcmKFy7R4sbCBRtnv6iJy611ZZb5wrF9We76NsuD1YN6ACpuRMJEK8P4RiT+SLWuX5yAA1kMzMfhmx8lADCEkqYz7VTfrliUwaiPHxsp2+QMGa/NmxauWZERaBFlkvNpzG69UhxOa7GWV9QBocpqD8tHqf1rs0D4arJA5Df2+ElKLymi1/S9DL54HR8vlnsad0cjHf7VVh4HJVrHPwqS2EkExA2r/He1S1z98edH1aWv5emdJ1chL8uRllJg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=labundy.com; dmarc=pass action=none header.from=labundy.com; dkim=pass header.d=labundy.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=NETORG5796793.onmicrosoft.com; s=selector1-NETORG5796793-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=lPfxuwLTmK+GkStKq+86hSwgk8J+FX39rElhUysleFA=; b=jlqzPD16o02S+VGYXtYR4bpgJzFVlqLceOq8mXRPiGOk+UN/DPRLblgefnY9uaezbG8+2F81K46zqd2n+Zosjzw6Zd6KBSlZFyg6XBic/kDgJhkcXdSt34g/SCzAuUxuKMbZmN4gcHzjhVfvo5VvmkIx84kn/doSwmUZ2SCBm5E= Authentication-Results: gmail.com; dkim=none (message not signed) header.d=none;gmail.com; dmarc=none action=none header.from=labundy.com; Received: from SN6PR08MB5517.namprd08.prod.outlook.com (2603:10b6:805:fb::32) by SN6PR08MB5631.namprd08.prod.outlook.com (2603:10b6:805:fb::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3283.20; Sun, 16 Aug 2020 21:15:12 +0000 Received: from SN6PR08MB5517.namprd08.prod.outlook.com ([fe80::2ca3:f294:d154:6875]) by SN6PR08MB5517.namprd08.prod.outlook.com ([fe80::2ca3:f294:d154:6875%6]) with mapi id 15.20.3283.027; Sun, 16 Aug 2020 21:15:12 +0000 From: Jeff LaBundy To: dmitry.torokhov@gmail.com, robh+dt@kernel.org Cc: linux-input@vger.kernel.org, devicetree@vger.kernel.org, Jeff LaBundy Subject: [PATCH 4/6] input: iqs269a: Add support for OTP variants Date: Sun, 16 Aug 2020 16:14:25 -0500 Message-Id: <1597612467-15093-5-git-send-email-jeff@labundy.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1597612467-15093-1-git-send-email-jeff@labundy.com> References: <1597612467-15093-1-git-send-email-jeff@labundy.com> X-ClientProxiedBy: SA9PR03CA0006.namprd03.prod.outlook.com (2603:10b6:806:20::11) To SN6PR08MB5517.namprd08.prod.outlook.com (2603:10b6:805:fb::32) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (136.49.227.119) by SA9PR03CA0006.namprd03.prod.outlook.com (2603:10b6:806:20::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.3283.27 via Frontend Transport; Sun, 16 Aug 2020 21:15:12 +0000 X-Mailer: git-send-email 2.7.4 X-Originating-IP: [136.49.227.119] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 49469f8d-fee2-429c-64c8-08d8422976a3 X-MS-TrafficTypeDiagnostic: SN6PR08MB5631: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8882; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: Gu4xswXGVRvAVvlnTBnoA2RZfA/XJFKoz2GtpRltqk/lz8KQuVnOya1DUHLT1s8De/9/CtjPyZ8CXWb98q4Af4GC6TVqY/Aksihf++0ET878UGxGWNUURGuzO4RI0lnsBixGV/g5B7o70s7+QgfYWPAvnd7l1xkUqtwV8r9AD52VSXK/nepSaaELN6u2iyru9KU4TIVj471/ct4MhNPCiL4oPPHjbqZiHss90sBm+bp6Ja3MHywDcQ2OkJTdJpQjWmaQ1HNRWThR2ZHvvEcnGKAkMUXorsxp+GMAASQiaKKSXIcONOQymeLD4XY6GrStjXy5wg/HEi+g0weEGrItvqq6qRG+/xoU1ubQ5T6M6whM8YcDd9/D0TtmXdgIrxLz X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SN6PR08MB5517.namprd08.prod.outlook.com;PTR:;CAT:NONE;SFS:(39830400003)(136003)(366004)(396003)(376002)(346002)(66476007)(6666004)(66556008)(69590400007)(36756003)(4326008)(86362001)(107886003)(2616005)(956004)(316002)(16526019)(8676002)(83380400001)(6506007)(8936002)(52116002)(6512007)(2906002)(478600001)(5660300002)(66946007)(26005)(186003)(6486002);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: labundy.com X-MS-Exchange-CrossTenant-Network-Message-Id: 49469f8d-fee2-429c-64c8-08d8422976a3 X-MS-Exchange-CrossTenant-AuthSource: SN6PR08MB5517.namprd08.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Aug 2020 21:15:12.5936 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 00b69d09-acab-4585-aca7-8fb7c6323e6f X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Rp0cZKMtRI4LmEk9rn9tnVfxaVzj+RqOnvy0mMHgGerJk7/gxj4SETZeVbPUjeRBq7dMl+iKccdckKn4e3rxlQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR08MB5631 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org This patch adds support for each available OTP variant of the device. The OTP configuration cannot be read over I2C, so it is derived from a compatible string instead. Early revisions of the D0 order code require their OTP-enabled func- tionality to be manually restored following a soft reset; this patch works around this erratum as well. Signed-off-by: Jeff LaBundy --- drivers/input/misc/iqs269a.c | 94 ++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 91 insertions(+), 3 deletions(-) diff --git a/drivers/input/misc/iqs269a.c b/drivers/input/misc/iqs269a.c index 095e5d5..04947f1 100644 --- a/drivers/input/misc/iqs269a.c +++ b/drivers/input/misc/iqs269a.c @@ -100,6 +100,11 @@ #define IQS269_MISC_B_TRACKING_UI_ENABLE BIT(4) #define IQS269_MISC_B_FILT_STR_SLIDER GENMASK(1, 0) +#define IQS269_TOUCH_HOLD_SLIDER_SEL 0x89 +#define IQS269_TOUCH_HOLD_DEFAULT 0x14 +#define IQS269_TOUCH_HOLD_MS_MIN 256 +#define IQS269_TOUCH_HOLD_MS_MAX 65280 + #define IQS269_TIMEOUT_TAP_MS_MAX 4080 #define IQS269_TIMEOUT_SWIPE_MS_MAX 4080 #define IQS269_THRESH_SWIPE_MAX 255 @@ -142,6 +147,10 @@ #define IQS269_CHx_HALL_INACTIVE 6 #define IQS269_CHx_HALL_ACTIVE 7 +#define IQS269_OTP_OPTION_DEFAULT 0x00 +#define IQS269_OTP_OPTION_TWS 0xD0 +#define IQS269_OTP_OPTION_HOLD BIT(7) + #define IQS269_HALL_PAD_R BIT(0) #define IQS269_HALL_PAD_L BIT(1) #define IQS269_HALL_PAD_INV BIT(6) @@ -322,6 +331,7 @@ struct iqs269_private { unsigned int keycode[ARRAY_SIZE(iqs269_events) * IQS269_NUM_CH]; unsigned int gs_code[IQS269_NUM_SL][IQS269_NUM_GESTURES]; unsigned int suspend_mode; + unsigned int otp_option; unsigned int delay_mult; unsigned int ch_num; bool hall_enable; @@ -333,6 +343,14 @@ static enum iqs269_slider_id iqs269_slider_type(struct iqs269_private *iqs269, { int i; + /* + * Slider 1 is unavailable if the touch-and-hold option is enabled via + * OTP. In that case, the channel selection register is repurposed for + * the touch-and-hold timer ceiling. + */ + if (slider_num && (iqs269->otp_option & IQS269_OTP_OPTION_HOLD)) + return IQS269_SLIDER_NONE; + if (!iqs269->sys_reg.slider_select[slider_num]) return IQS269_SLIDER_NONE; @@ -567,7 +585,8 @@ static int iqs269_parse_chan(struct iqs269_private *iqs269, if (fwnode_property_present(ch_node, "azoteq,slider0-select")) iqs269->sys_reg.slider_select[0] |= BIT(reg); - if (fwnode_property_present(ch_node, "azoteq,slider1-select")) + if (fwnode_property_present(ch_node, "azoteq,slider1-select") && + !(iqs269->otp_option & IQS269_OTP_OPTION_HOLD)) iqs269->sys_reg.slider_select[1] |= BIT(reg); ch_reg = &iqs269->ch_reg[reg]; @@ -999,7 +1018,43 @@ static int iqs269_parse_prop(struct iqs269_private *iqs269) sys_reg->blocking = 0; sys_reg->slider_select[0] = 0; - sys_reg->slider_select[1] = 0; + + /* + * If configured via OTP to do so, the device asserts a pulse on the + * GPIO4 pin for approximately 60 ms once a selected channel is held + * in a state of touch for a configurable length of time. + * + * In that case, the register used for slider 1 channel selection is + * repurposed for the touch-and-hold timer ceiling. + */ + if (iqs269->otp_option & IQS269_OTP_OPTION_HOLD) { + if (!device_property_read_u32(&client->dev, + "azoteq,touch-hold-ms", &val)) { + if (val < IQS269_TOUCH_HOLD_MS_MIN || + val > IQS269_TOUCH_HOLD_MS_MAX) { + dev_err(&client->dev, + "Invalid touch-and-hold ceiling: %u\n", + val); + return -EINVAL; + } + + sys_reg->slider_select[1] = val / 256; + } else if (iqs269->ver_info.fw_num < IQS269_VER_INFO_FW_NUM_3) { + /* + * The default touch-and-hold timer ceiling initially + * read from early revisions of silicon is invalid if + * the device experienced a soft reset between power- + * on and the read operation. + * + * To protect against this case, explicitly cache the + * default value so that it is restored each time the + * device is re-initialized. + */ + sys_reg->slider_select[1] = IQS269_TOUCH_HOLD_DEFAULT; + } + } else { + sys_reg->slider_select[1] = 0; + } sys_reg->event_mask = ~((u8)IQS269_EVENT_MASK_SYS); @@ -1140,6 +1195,12 @@ static int iqs269_parse_prop(struct iqs269_private *iqs269) return 0; } +static const struct reg_sequence iqs269_tws_init[] = { + { IQS269_TOUCH_HOLD_SLIDER_SEL, IQS269_TOUCH_HOLD_DEFAULT }, + { 0xF0, 0x580F }, + { 0xF0, 0x59EF }, +}; + static int iqs269_dev_init(struct iqs269_private *iqs269) { struct iqs269_sys_reg *sys_reg = &iqs269->sys_reg; @@ -1149,6 +1210,18 @@ static int iqs269_dev_init(struct iqs269_private *iqs269) mutex_lock(&iqs269->lock); + /* + * Early revisions of silicon require the following workaround in order + * to restore any OTP-enabled functionality after a soft reset. + */ + if (iqs269->otp_option == IQS269_OTP_OPTION_TWS && + iqs269->ver_info.fw_num < IQS269_VER_INFO_FW_NUM_3) { + error = regmap_multi_reg_write(iqs269->regmap, iqs269_tws_init, + ARRAY_SIZE(iqs269_tws_init)); + if (error) + goto err_mutex; + } + error = regmap_update_bits(iqs269->regmap, IQS269_HALL_UI, IQS269_HALL_UI_ENABLE, iqs269->hall_enable ? ~0 : 0); @@ -1807,6 +1880,10 @@ static int iqs269_probe(struct i2c_client *client) i2c_set_clientdata(client, iqs269); iqs269->client = client; + if (client->dev.of_node) + iqs269->otp_option = (uintptr_t) + of_device_get_match_data(&client->dev); + iqs269->regmap = devm_regmap_init_i2c(client, &iqs269_regmap_config); if (IS_ERR(iqs269->regmap)) { error = PTR_ERR(iqs269->regmap); @@ -1967,7 +2044,18 @@ static int __maybe_unused iqs269_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(iqs269_pm, iqs269_suspend, iqs269_resume); static const struct of_device_id iqs269_of_match[] = { - { .compatible = "azoteq,iqs269a" }, + { + .compatible = "azoteq,iqs269a", + .data = (void *)IQS269_OTP_OPTION_DEFAULT, + }, + { + .compatible = "azoteq,iqs269a-00", + .data = (void *)IQS269_OTP_OPTION_DEFAULT, + }, + { + .compatible = "azoteq,iqs269a-d0", + .data = (void *)IQS269_OTP_OPTION_TWS, + }, { } }; MODULE_DEVICE_TABLE(of, iqs269_of_match);