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=-9.8 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,URIBL_BLOCKED,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 E7A84C83000 for ; Tue, 28 Apr 2020 18:07:56 +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 B38B520B80 for ; Tue, 28 Apr 2020 18:07:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="k8p/lyLa"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="TXM+NLMR" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B38B520B80 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org 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:References:In-Reply-To: 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=h1JGthSBm2PQJTbQhTV8XNXy390zA2fnOJ95cxPqXMU=; b=k8p/lyLahFn0N2 382swWiNTJmRq3XC8wKmVKnQzjVhYSyK+eHrEghcx/gD+BW4fdHDnIzgh1Gp23otsmG3z63csD8BA DpMy1q+EkjVSLuytwFJysZqkoARmtJ1bN0wlc5R2Qxl3bjUl/vwvEmr2RHwqE/duye6MWSXorC0Yk 6EhxyHxfgUeXQCsm19VK6jHQY/43HMNqhpjobBRP+n5koJo9SDfVd102Y19sQ6dznyVgxXO+DpvV4 bkmCRChwwts8vLEHjhUWhxyyWK1HxIf/Z8CvW7HkxbJXpiLlM9yCeq7LsE9e8Ge8rrLCgrDP0RLNU e9SwB/dFlK8BxpJri1jQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jTUeB-0002ax-Ue; Tue, 28 Apr 2020 18:07:55 +0000 Received: from mail-wr1-x442.google.com ([2a00:1450:4864:20::442]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jTUdi-0002BB-7f for linux-arm-kernel@lists.infradead.org; Tue, 28 Apr 2020 18:07:27 +0000 Received: by mail-wr1-x442.google.com with SMTP id d15so24161392wrx.3 for ; Tue, 28 Apr 2020 11:07:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=28cDGW7lHDBW0cMjOkUmPSwiyuA8fTJeT/DBNYotCsg=; b=TXM+NLMRCnS9+pSCoTO2uWxK0dqqac8UQX/pcooJaNoiSMsBja1cqbUl3ZbIPeQxjb uaubDOvNUoRBxLdgA06QmhKcoVD47twZy+WdznWp9snzqpArXlLDciomOOQwYZ2gNngX 08Ax13mceLMM1qdsCp5CMzJ+68XA7X/dE7fuhuZVl4ss2ogVUMmP44QJOjTyHEgdG2vH 8GgGPn/MsNL64ig+2r5Wd/swPH1JptGhwuwQZTTL4mqoZkr0BiBXUM3FuF2248STnrDd B415bjkdtM8+Z1rpjWGirq0eqQiWI939m8qkHu0AAhxU2nklyzFyAZkI5+6Op2ikXsjg Gz2g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=28cDGW7lHDBW0cMjOkUmPSwiyuA8fTJeT/DBNYotCsg=; b=OP2oTc2R87+Z2NDd5wmTujRvrowbko+Y3MpVYsJOVU9w7Vs0C3h1zlBc/qmLZUGpNS mvl82kloboADsIiiI3ooNOTI/EfX7yuF+wWlVBg9V4Q8Y5rllOh8AlvGna4CMS7sPH5A LNumxkC9QJcKyIXU/kGDLu2nilbBrjqkTw/JtiFfKBKepCdRfu9AHi//0kUC3CPGpc4A LVfIYoyUunErVdTeAA+Bs+aIzjeuqUH0EHTkR8eIGfR542CPCCZZ6naL38sco53vdGB1 pUSNQgirvpdk8FCMiSBfgvDDwd+vp7JrJNOZbSRwrM1F2R8A0Cq7qj0o5XP0AGxoBXef XXSg== X-Gm-Message-State: AGi0Pubi1u3qNMSb3UkxH1QEcyd2mpBw9ammLCO3UFGpZTKHCi4io354 o0HHfsSC3smzucCQr9CCHEuT3A== X-Google-Smtp-Source: APiQypI8PJzjnfy3x58pQ9Accr3Blr++TnRQfRHkv2Jckw04YP5uWoNw5VlXdSvsvq3SUfkryVkoZA== X-Received: by 2002:a5d:4cc2:: with SMTP id c2mr33703590wrt.130.1588097244819; Tue, 28 Apr 2020 11:07:24 -0700 (PDT) Received: from xps7590.local ([37.120.81.28]) by smtp.gmail.com with ESMTPSA id m14sm26202789wrs.76.2020.04.28.11.07.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Apr 2020 11:07:24 -0700 (PDT) From: Robert Foss To: Andy Shevchenko , Sakari Ailus , Marco Felsch , Maxime Ripard , linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v5 v5 3/3] media: ov8856: Implement sensor module revision identification Date: Tue, 28 Apr 2020 20:07:18 +0200 Message-Id: <20200428180718.1609826-3-robert.foss@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200428180718.1609826-1-robert.foss@linaro.org> References: <20200428180718.1609826-1-robert.foss@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200428_110726_272962_BF8FD839 X-CRM114-Status: GOOD ( 12.12 ) 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: Fabio Estevam , Dongchun Zhu , Robert Foss , Tomasz Figa 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 Query the sensor for its module revision, and compare it to known revisions. Currently only the '1B' revision has been added. Signed-off-by: Robert Foss --- - Changes since v3: * Actually add module revision 2A - Changes since v2: * Add module revision 2A * Sakari: Remove ov8856_check_revision() * Sakari: Stop EEPROM streaming mode drivers/media/i2c/ov8856.c | 53 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c index 48b02b8d205f..a0ba0a5d5aad 100644 --- a/drivers/media/i2c/ov8856.c +++ b/drivers/media/i2c/ov8856.c @@ -32,6 +32,19 @@ #define OV8856_MODE_STANDBY 0x00 #define OV8856_MODE_STREAMING 0x01 +/* module revisions */ +#define OV8856_2A_MODULE 0x01 +#define OV8856_1B_MODULE 0x02 + +/* the OTP read-out buffer is at 0x7000 and 0xf is the offset + * of the byte in the OTP that means the module revision + */ +#define OV8856_MODULE_REVISION 0x700f +#define OV8856_OTP_MODE_CTRL 0x3d84 +#define OV8856_OTP_LOAD_CTRL 0x3d81 +#define OV8856_OTP_MODE_AUTO 0x00 +#define OV8856_OTP_LOAD_CTRL_ENABLE BIT(0) + /* vertical-timings from sensor */ #define OV8856_REG_VTS 0x380e #define OV8856_VTS_MAX 0x7fff @@ -1152,6 +1165,46 @@ static int ov8856_identify_module(struct ov8856 *ov8856) return -ENXIO; } + ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, + OV8856_REG_VALUE_08BIT, OV8856_MODE_STREAMING); + if (ret) + return ret; + + ret = ov8856_write_reg(ov8856, OV8856_OTP_MODE_CTRL, + OV8856_REG_VALUE_08BIT, OV8856_OTP_MODE_AUTO); + if (ret) { + dev_err(&client->dev, "failed to set otp mode"); + return ret; + } + + ret = ov8856_write_reg(ov8856, OV8856_OTP_LOAD_CTRL, + OV8856_REG_VALUE_08BIT, + OV8856_OTP_LOAD_CTRL_ENABLE); + if (ret) { + dev_err(&client->dev, "failed to enable load control"); + return ret; + } + + ret = ov8856_read_reg(ov8856, OV8856_MODULE_REVISION, + OV8856_REG_VALUE_08BIT, &val); + if (ret) { + dev_err(&client->dev, "failed to read module revision"); + return ret; + } + + dev_info(&client->dev, "OV8856 revision %x (%s) at address 0x%02x\n", + val, + val == OV8856_2A_MODULE ? "2A" : + val == OV8856_1B_MODULE ? "1B" : "unknown revision", + client->addr); + + ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT, + OV8856_REG_VALUE_08BIT, OV8856_MODE_STANDBY); + if (ret) { + dev_err(&client->dev, "failed to exit streaming mode"); + return ret; + } + return 0; } -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel