From patchwork Wed Apr 8 11:08:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robert Foss X-Patchwork-Id: 11479807 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 6C9D881 for ; Wed, 8 Apr 2020 11:09:14 +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 364122076D for ; Wed, 8 Apr 2020 11:09:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="USoEzKx8"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="CoSrQxuO" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 364122076D 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+patchwork-linux-arm=patchwork.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=b+G50J3vKohHCMhsg0yWCf+yYREfeasvM6iJVE1sLOU=; b=USoEzKx8HLb6lr HVzHWGFB23OHN2U1FPPONDOejEhAXod8g1/yoMppO1LUjnk4DUE+HNXyPWa8eLKndTRcfLOUsST03 l4y8Xq2mcLXDzKuuGkWqR4QMypKROm1Oiyu6bBoMY7Xb2IZn/6esBvgoyLeZdAO0HAMwYnysOBVeB 9/KFneyz8sn/hM+FCWVLGjw8TtkXhM+ckK522UCd3AK1lysO6cTybl1YQ7Hhku7zDz8wPCNnswrPU inhZ6mNX9fEk7EFnvuNLclzaiwZDM6Q9Jrm2FyCMyqwpw0zLh5cQx81LqlE3AyitBVSKe1aXrucdE xUXh8zRrKg9DxAotwxRQ==; 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 1jM8Zz-0002Zq-2m; Wed, 08 Apr 2020 11:09:11 +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 1jM8ZI-0001mt-K0 for linux-arm-kernel@lists.infradead.org; Wed, 08 Apr 2020 11:08:30 +0000 Received: by mail-wr1-x442.google.com with SMTP id p10so7315952wrt.6 for ; Wed, 08 Apr 2020 04:08:28 -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=jeVjBN/6H/gI6gMyuL/+Tdutryht/EUxewf1jqrLbh8=; b=CoSrQxuOgUErP6j4vE5Hnof3IlCEsZecLbmey7kO4uUjcv82/taslS3HKv0A+42o5L OfbEuUrdi0sjmzf9L9MH44bGbnbnhN2vWSuWO9+xJYWDm2mS2PpB9tDa4GSJWUxr1xxA Q8B6NmnYq8CJAjZTwoUszgiOYZ0nNUxeRS6/TuV7+U9ZbMFMgvjwdd3i489E21poNS/e qfg63B8lm51EjOhKSrh+40rsC7XGQrzqGvAHzE7ZZZ3sS6llZOha4jGpQBPQ8Y0ZquY+ YNXfDO3eRm56/YZHWf9E94HQkGmp4nJza9reFnnWVLLTGS50ED2VdfYH+rExUOCIdMJM /UGQ== 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=jeVjBN/6H/gI6gMyuL/+Tdutryht/EUxewf1jqrLbh8=; b=Mu5gdvIb8WgeQDYMqK+1FGCO7+0vRUaKyx8xUfRs+gFB5pz7LRV442ZRKRCLK8JGx3 TQPszuYB/GehsYHpYyk67HjkZMaHhAm1HUPjTzv7A+O9Y0eJR3gTeOvkCAS0Nw+B5N/v SKweOBBC48F0yPcpmcJYrjmgJW5VwYwYbS5F3BQJXUjHp8Tu4z6qZbqwKcjdg2cqcEJL kgJElY9FScWjUoxxpj1Q3jgfTW7clHJf84rlL7yV+8AAxvL3JvvwYajPfbcc8AJFEnzm phEHrq8zm7L4Kn3u4xyW63cIqNU9HTiZwaRFPUmNpl6KmvTdkwf98qBu6dIUq/9/KIcO GUDQ== X-Gm-Message-State: AGi0PuZu68Dz5BVANohks15khbUyyYwivzNpKmnANFdxuBCsfTta2wgZ Ic6J+zVgdko7riv4yWpgd7+V4A== X-Google-Smtp-Source: APiQypLzDqcFeNJoAa/AvreW1err4IF4jkgQFP1M6cVKPw6A9RRXkIJZFlBSKVJUggBN9Dvq+Tnp2g== X-Received: by 2002:a5d:4306:: with SMTP id h6mr7558068wrq.234.1586344107109; Wed, 08 Apr 2020 04:08:27 -0700 (PDT) Received: from localhost.localdomain ([37.120.50.78]) by smtp.gmail.com with ESMTPSA id i8sm37596253wrb.41.2020.04.08.04.08.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Apr 2020 04:08:26 -0700 (PDT) From: Robert Foss To: Dongchun Zhu , Fabio Estevam , Andy Shevchenko , Sakari Ailus , Marco Felsch , Tomasz Figa , Maxime Ripard , linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v4 3/3] media: ov8856: Implement sensor module revision identification Date: Wed, 8 Apr 2020 13:08:16 +0200 Message-Id: <20200408110816.2712841-4-robert.foss@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200408110816.2712841-1-robert.foss@linaro.org> References: <20200408110816.2712841-1-robert.foss@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200408_040828_660817_506906E2 X-CRM114-Status: GOOD ( 12.26 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:442 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 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: Robert Foss Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.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 473d3245344a..de0b484b85d0 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; }