From patchwork Mon Feb 17 16:55:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "H. Nikolaus Schaller" X-Patchwork-Id: 11386903 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 89370139A for ; Mon, 17 Feb 2020 16:55:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6A7EC227BF for ; Mon, 17 Feb 2020 16:55:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=goldelico.com header.i=@goldelico.com header.b="jxzbvijI" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729019AbgBQQzk (ORCPT ); Mon, 17 Feb 2020 11:55:40 -0500 Received: from mo4-p03-ob.smtp.rzone.de ([85.215.255.104]:35428 "EHLO mo4-p03-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728791AbgBQQzk (ORCPT ); Mon, 17 Feb 2020 11:55:40 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1581958537; s=strato-dkim-0002; d=goldelico.com; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: X-RZG-CLASS-ID:X-RZG-AUTH:From:Subject:Sender; bh=gTk8MRIaL+Zoo6AYmT56Y6jd8ZDzvosVYa8gE1FYjOU=; b=jxzbvijIQbBRUsIBTju5RoF96hW3gOLEHd2pEUNFIYC90kpiRGznHONXB9dfySZ+bl TgLY/6rHK+mZmL5MtZEdUJviKo/cP4w517ot+YVMGL4hAXQEEcB6oKvFseCOOFqV1xK3 b6nxuspMcW+hbDv09eIL49Q1kU67TzGCGHffQkB/rG/fM5YK+xQLrNMxEl92XsfqhcWI KcMTry/xu4DdmrSyI/kaQu94f2MlGhhBscDWgcKf+lSoXb8QqIYZ9qkyqcTrbdEtt1UD NeyUX81h7aF71ttjl2mKwZbzt9X7AwtAzffEREIm9H4l0kKXOxCTp4IBhGLxrzrHo17y 1aJw== X-RZG-AUTH: ":JGIXVUS7cutRB/49FwqZ7WcJeFKiMhflhwDubTJ9o1mfYzBGHXL8GTnsvhg=" X-RZG-CLASS-ID: mo00 Received: from iMac.fritz.box by smtp.strato.de (RZmta 46.1.12 DYNA|AUTH) with ESMTPSA id U06217w1HGtXOqs (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Mon, 17 Feb 2020 17:55:33 +0100 (CET) From: "H. Nikolaus Schaller" To: PrasannaKumar Muralidharan , Paul Cercueil , Mathieu Malaterre , Srinivas Kandagatla , Rob Herring , Mark Rutland , Ralf Baechle , Paul Burton , Mauro Carvalho Chehab , "David S. Miller" , Greg Kroah-Hartman , Jonathan Cameron , "H. Nikolaus Schaller" , Krzysztof Kozlowski , Kees Cook , Andi Kleen , Geert Uytterhoeven Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mips@vger.kernel.org, letux-kernel@openphoenux.org, kernel@pyra-handheld.com Subject: [RFC v4 3/6] Documentation: ABI: nvmem: add documentation for JZ4780 efuse ABI Date: Mon, 17 Feb 2020 17:55:27 +0100 Message-Id: X-Mailer: git-send-email 2.23.0 In-Reply-To: References: MIME-Version: 1.0 Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org From: PrasannaKumar Muralidharan This patch brings support for the JZ4780 efuse. Currently it only expose a read only access to the entire 8K bits efuse memory. Tested-by: Mathieu Malaterre Signed-off-by: PrasannaKumar Muralidharan Signed-off-by: Mathieu Malaterre --- .../ABI/testing/sysfs-driver-jz4780-efuse | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-driver-jz4780-efuse diff --git a/Documentation/ABI/testing/sysfs-driver-jz4780-efuse b/Documentation/ABI/testing/sysfs-driver-jz4780-efuse new file mode 100644 index 000000000000..bb6f5d6ceea0 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-driver-jz4780-efuse @@ -0,0 +1,16 @@ +What: /sys/devices/*//nvmem +Date: December 2017 +Contact: PrasannaKumar Muralidharan +Description: read-only access to the efuse on the Ingenic JZ4780 SoC + The SoC has a one time programmable 8K efuse that is + split into segments. The driver supports read only. + The segments are + 0x000 64 bit Random Number + 0x008 128 bit Ingenic Chip ID + 0x018 128 bit Customer ID + 0x028 3520 bit Reserved + 0x1E0 8 bit Protect Segment + 0x1E1 2296 bit HDMI Key + 0x300 2048 bit Security boot key +Users: any user space application which wants to read the Chip + and Customer ID