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=-8.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,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 906C3C48BD6 for ; Tue, 25 Jun 2019 08:07:42 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 60EE4208C3 for ; Tue, 25 Jun 2019 08:07:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="lb4nTDl/"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=microchiptechnology.onmicrosoft.com header.i=@microchiptechnology.onmicrosoft.com header.b="ZG1JZJcy" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 60EE4208C3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=microchip.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:In-Reply-To:References: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=u8saKBD1h+9x4Ja2BI40NJa4u0D/ljCWOvud5IB43nk=; b=lb4nTDl/WlgMPP 3mocXW/BdofulXwihvtSeGV6vc2Tljmkph2rX37swNW9BjzAMwj5MU8geX4Hy5n9UQOe+IT3LNzLw HUvrqi2W8LqLWIf+xua7nrDxYZeXRmgAVM0wV6TPXE718eFpo4pnI1Q7qeCMqGOZqRSkAfTK9qR1M tyRoD8B+PciVRVRMaipqgCNBPW2noFwwkG/38ZzL86RHbEOaKYmvJN3mDI/FzgnyAEiUgBAXNJYwE +FfbhAb90Spjc7LVWlIbEoq39XDIyvXlE3NBC5w8gZttNAD5U97HIx4Le6bo6yLg2QFqu30ahAob+ J96WC5wNZDxxxJKwUP6Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hfgUJ-0002ha-8o; Tue, 25 Jun 2019 08:07:35 +0000 Received: from esa1.microchip.iphmx.com ([68.232.147.91]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hfgS1-0000Va-3Z for linux-arm-kernel@lists.infradead.org; Tue, 25 Jun 2019 08:05:15 +0000 Received-SPF: Pass (esa1.microchip.iphmx.com: domain of Eugen.Hristev@microchip.com designates 198.175.253.82 as permitted sender) identity=mailfrom; client-ip=198.175.253.82; receiver=esa1.microchip.iphmx.com; envelope-from="Eugen.Hristev@microchip.com"; x-sender="Eugen.Hristev@microchip.com"; x-conformance=spf_only; x-record-type="v=spf1"; x-record-text="v=spf1 mx a:ushub1.microchip.com a:smtpout.microchip.com a:mx1.microchip.iphmx.com a:mx2.microchip.iphmx.com include:servers.mcsv.net include:mktomail.com include:spf.protection.outlook.com ~all" Received-SPF: None (esa1.microchip.iphmx.com: no sender authenticity information available from domain of postmaster@email.microchip.com) identity=helo; client-ip=198.175.253.82; receiver=esa1.microchip.iphmx.com; envelope-from="Eugen.Hristev@microchip.com"; x-sender="postmaster@email.microchip.com"; x-conformance=spf_only Authentication-Results: esa1.microchip.iphmx.com; spf=Pass smtp.mailfrom=Eugen.Hristev@microchip.com; spf=None smtp.helo=postmaster@email.microchip.com; dkim=pass (signature verified) header.i=@microchiptechnology.onmicrosoft.com; dmarc=pass (p=none dis=none) d=microchip.com X-IronPort-AV: E=Sophos;i="5.63,415,1557212400"; d="scan'208";a="40295037" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa1.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 25 Jun 2019 01:05:12 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.87.151) by chn-vm-ex03.mchp-main.com (10.10.87.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Tue, 25 Jun 2019 01:05:15 -0700 Received: from NAM05-CO1-obe.outbound.protection.outlook.com (10.10.215.89) by email.microchip.com (10.10.87.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.1713.5 via Frontend Transport; Tue, 25 Jun 2019 01:05:15 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=microchiptechnology.onmicrosoft.com; s=selector1-microchiptechnology-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=jPtpqbILqCkHvj0cCIsvblV4Ujs4kfGwKiApPqwXVrE=; b=ZG1JZJcy9/qHMV4FkKqel1IOpzDkXBIpgqTeLtTUSIn5CIAmNPGgf/CzR7a03VeE7A7ZpZ5+VNROPLptKU/FBLPTpQ9L0usaLkMEaEL+oxxm0zE1BV2bwEC1eWbmcu5E3hoGoztD8RLbqSM7ULGPBjOTagnL24sCJVJhYmvlzy4= Received: from DM5PR11MB1242.namprd11.prod.outlook.com (10.168.108.8) by DM5PR11MB1289.namprd11.prod.outlook.com (10.168.103.137) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2008.16; Tue, 25 Jun 2019 08:05:04 +0000 Received: from DM5PR11MB1242.namprd11.prod.outlook.com ([fe80::6476:ace0:bf3a:322]) by DM5PR11MB1242.namprd11.prod.outlook.com ([fe80::6476:ace0:bf3a:322%9]) with mapi id 15.20.2008.017; Tue, 25 Jun 2019 08:05:03 +0000 From: To: , , , , , , , , , Subject: [PATCH v2 7/9] i2c: at91: add support for analog filtering Thread-Topic: [PATCH v2 7/9] i2c: at91: add support for analog filtering Thread-Index: AQHVKyyxFUkNa/ZYyUGd5i25NVGhpQ== Date: Tue, 25 Jun 2019 08:05:03 +0000 Message-ID: <1561449642-26956-8-git-send-email-eugen.hristev@microchip.com> References: <1561449642-26956-1-git-send-email-eugen.hristev@microchip.com> In-Reply-To: <1561449642-26956-1-git-send-email-eugen.hristev@microchip.com> Accept-Language: ro-RO, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: VI1PR10CA0105.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:803:28::34) To DM5PR11MB1242.namprd11.prod.outlook.com (2603:10b6:3:14::8) x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.7.4 x-originating-ip: [94.177.32.154] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 696859fa-124f-4b92-8e0e-08d6f943d3ee x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(2017052603328)(7193020); SRVR:DM5PR11MB1289; x-ms-traffictypediagnostic: DM5PR11MB1289: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:5797; x-forefront-prvs: 0079056367 x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(376002)(136003)(39860400002)(366004)(396003)(346002)(189003)(199004)(6512007)(53936002)(86362001)(110136005)(6486002)(6436002)(2201001)(316002)(14454004)(2906002)(478600001)(72206003)(66556008)(5660300002)(64756008)(66946007)(66476007)(66446008)(256004)(71200400001)(71190400001)(36756003)(107886003)(305945005)(7736002)(6116002)(25786009)(73956011)(4326008)(3846002)(68736007)(446003)(11346002)(386003)(52116002)(76176011)(2501003)(99286004)(6506007)(486006)(476003)(2616005)(8676002)(66066001)(186003)(26005)(102836004)(50226002)(81166006)(8936002)(81156014)(921003)(1121003); DIR:OUT; SFP:1101; SCL:1; SRVR:DM5PR11MB1289; H:DM5PR11MB1242.namprd11.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: microchip.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: cQBae6UjhoH0Mi+gG+RPBd+ZFxPaW7k8qoLnnqYYTo16EJBBzz4Pp8X8TKgrkKmATvmlwQIXNxvITlp8LRPE47TTfR3x64tvtXFEcI7lNetqr99fs1EK5OAth2gFOjBbsmhWEyBMo+8KF5SKpL2XTXyOqqsH4lRxbbEwn0KX2jxIi7pggLy+74168qZAwGMCSd4wdWtPFPIPKPcI4g9YKK0nc6SxLziKOZg80l+Zdai9PW565FepymI7d8R4Y3YB3Wv/p8m601tdffc/bwH6uYXOAciKiHkBfKmU7o7Zej9U4eSqi1H4tDTFFeNGZytzU9CxMfNzR0prgTtK5M/sFdSVmLX9Aa08aI0j/14xim9OCrOqIvzi+pLLjK98Ci33u0pPjq2zEivDEB4drT22UjnbmDyx/3lJlDsPiYvvAaE= MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 696859fa-124f-4b92-8e0e-08d6f943d3ee X-MS-Exchange-CrossTenant-originalarrivaltime: 25 Jun 2019 08:05:03.8790 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3f4057f3-b418-4d4e-ba84-d55b4e897d88 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: eugen.hristev@microchip.com X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR11MB1289 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190625_010513_366810_31C13230 X-CRM114-Status: GOOD ( 13.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Eugen.Hristev@microchip.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Eugen Hristev Add support for analog filtering for i2c lines. The sama5d2 and sam9x60 support this feature. Signed-off-by: Eugen Hristev --- drivers/i2c/busses/i2c-at91-core.c | 9 +++++++++ drivers/i2c/busses/i2c-at91-master.c | 17 +++++++++++++---- drivers/i2c/busses/i2c-at91.h | 4 ++++ 3 files changed, 26 insertions(+), 4 deletions(-) diff --git a/drivers/i2c/busses/i2c-at91-core.c b/drivers/i2c/busses/i2c-at91-core.c index 3bbe37c..d2840ba 100644 --- a/drivers/i2c/busses/i2c-at91-core.c +++ b/drivers/i2c/busses/i2c-at91-core.c @@ -70,6 +70,7 @@ static struct at91_twi_pdata at91rm9200_config = { .has_hold_field = false, .has_dig_filtr = false, .has_adv_dig_filtr = false, + .has_ana_filtr = false, }; static struct at91_twi_pdata at91sam9261_config = { @@ -80,6 +81,7 @@ static struct at91_twi_pdata at91sam9261_config = { .has_hold_field = false, .has_dig_filtr = false, .has_adv_dig_filtr = false, + .has_ana_filtr = false, }; static struct at91_twi_pdata at91sam9260_config = { @@ -90,6 +92,7 @@ static struct at91_twi_pdata at91sam9260_config = { .has_hold_field = false, .has_dig_filtr = false, .has_adv_dig_filtr = false, + .has_ana_filtr = false, }; static struct at91_twi_pdata at91sam9g20_config = { @@ -100,6 +103,7 @@ static struct at91_twi_pdata at91sam9g20_config = { .has_hold_field = false, .has_dig_filtr = false, .has_adv_dig_filtr = false, + .has_ana_filtr = false, }; static struct at91_twi_pdata at91sam9g10_config = { @@ -110,6 +114,7 @@ static struct at91_twi_pdata at91sam9g10_config = { .has_hold_field = false, .has_dig_filtr = false, .has_adv_dig_filtr = false, + .has_ana_filtr = false, }; static const struct platform_device_id at91_twi_devtypes[] = { @@ -142,6 +147,7 @@ static struct at91_twi_pdata at91sam9x5_config = { .has_hold_field = false, .has_dig_filtr = false, .has_adv_dig_filtr = false, + .has_ana_filtr = false, }; static struct at91_twi_pdata sama5d4_config = { @@ -152,6 +158,7 @@ static struct at91_twi_pdata sama5d4_config = { .has_hold_field = true, .has_dig_filtr = true, .has_adv_dig_filtr = false, + .has_ana_filtr = false, }; static struct at91_twi_pdata sama5d2_config = { @@ -162,6 +169,7 @@ static struct at91_twi_pdata sama5d2_config = { .has_hold_field = true, .has_dig_filtr = true, .has_adv_dig_filtr = true, + .has_ana_filtr = true, }; static struct at91_twi_pdata sam9x60_config = { @@ -172,6 +180,7 @@ static struct at91_twi_pdata sam9x60_config = { .has_hold_field = true, .has_dig_filtr = true, .has_adv_dig_filtr = true, + .has_ana_filtr = true, }; static const struct of_device_id atmel_twi_dt_ids[] = { diff --git a/drivers/i2c/busses/i2c-at91-master.c b/drivers/i2c/busses/i2c-at91-master.c index d82601b..8fe3a2c 100644 --- a/drivers/i2c/busses/i2c-at91-master.c +++ b/drivers/i2c/busses/i2c-at91-master.c @@ -32,6 +32,7 @@ void at91_init_twi_bus_master(struct at91_twi_dev *dev) { struct at91_twi_pdata *pdata = dev->pdata; + u32 filtr = 0; /* FIFO should be enabled immediately after the software reset */ if (dev->fifo_size) @@ -42,13 +43,19 @@ void at91_init_twi_bus_master(struct at91_twi_dev *dev) /* enable digital filter */ if (pdata->has_dig_filtr && dev->enable_dig_filt) - at91_twi_write(dev, AT91_TWI_FILTR, AT91_TWI_FILTR_FILT); + filtr |= AT91_TWI_FILTR_FILT; /* enable advanced digital filter */ if (pdata->has_adv_dig_filtr && dev->enable_dig_filt) - at91_twi_write(dev, AT91_TWI_FILTR, AT91_TWI_FILTR_FILT | - (AT91_TWI_FILTR_THRES(7) & - AT91_TWI_FILTR_THRES_MASK)); + filtr |= AT91_TWI_FILTR_FILT | + (AT91_TWI_FILTR_THRES(7) & AT91_TWI_FILTR_THRES_MASK); + + /* enable analog filter */ + if (pdata->has_ana_filtr && dev->enable_ana_filt) + filtr |= AT91_TWI_FILTR_PADFEN | AT91_TWI_FILTR_PADFCFG; + + if (filtr) + at91_twi_write(dev, AT91_TWI_FILTR, filtr); } /* @@ -807,6 +814,8 @@ int at91_twi_probe_master(struct platform_device *pdev, dev->enable_dig_filt = of_property_read_bool(pdev->dev.of_node, "enable-dig-filt"); + dev->enable_ana_filt = of_property_read_bool(pdev->dev.of_node, + "enable-ana-filt"); at91_calc_twi_clock(dev); dev->adapter.algo = &at91_twi_algorithm; diff --git a/drivers/i2c/busses/i2c-at91.h b/drivers/i2c/busses/i2c-at91.h index 7b8c371..4ca9c191 100644 --- a/drivers/i2c/busses/i2c-at91.h +++ b/drivers/i2c/busses/i2c-at91.h @@ -86,6 +86,8 @@ #define AT91_TWI_FILTR 0x0044 #define AT91_TWI_FILTR_FILT BIT(0) +#define AT91_TWI_FILTR_PADFEN BIT(1) +#define AT91_TWI_FILTR_PADFCFG BIT(2) #define AT91_TWI_FILTR_THRES(v) ((v) << 8) #define AT91_TWI_FILTR_THRES_MASK GENMASK(10, 8) @@ -115,6 +117,7 @@ struct at91_twi_pdata { bool has_hold_field; bool has_dig_filtr; bool has_adv_dig_filtr; + bool has_ana_filtr; struct at_dma_slave dma_slave; }; @@ -153,6 +156,7 @@ struct at91_twi_dev { struct i2c_client *slave; #endif bool enable_dig_filt; + bool enable_ana_filt; }; unsigned at91_twi_read(struct at91_twi_dev *dev, unsigned reg); -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel