From patchwork Mon Apr 23 12:41:46 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jerome Brunet X-Patchwork-Id: 133993 Delivered-To: patch@linaro.org Received: by 10.46.151.6 with SMTP id r6csp949876lji; Mon, 23 Apr 2018 05:41:59 -0700 (PDT) X-Google-Smtp-Source: AIpwx4/vUZOfttQLbM/zqqIOXVwcuRqINSa0TtKbYJVq6nX+chjG332B/pYN2r5z8Sfy1VFV1V/S X-Received: by 10.99.120.74 with SMTP id t71mr17265287pgc.310.1524487319352; Mon, 23 Apr 2018 05:41:59 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1524487319; cv=none; d=google.com; s=arc-20160816; b=Un5D8Ac2xy3eeCqUiKjbKvkDcgv00J5fPRZ8kQL/ED8yoFCQr/i/+QHoZaq+5VLDKe Y3062ZBqX07O7Mehu6MLlGTL9lgmL4EP0dNijYLZzgoMFfgUxICDeWlyS3+FjMsENH8X xW4wgw4acxgRmaZbmwzjowPH3po0YuDKeAMoGjQnb0O40qWTTdkn5Jee9P6QqYkgQ+Yf BFr+oE2aUEm2n8tf3gC0F5txFXT0kPE5avRCEx/AnGf9AJZ1XmC/MRDsK1DnQxJHKpW8 AOJLCkA8FrhTF9kRmv154jKyWmuzuVOuFYXq6DwmmpE0UKIyYmypeIYfc+GMI8Rw1ysj XT/Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:date:subject:cc:to:from :dkim-signature:arc-authentication-results; bh=GQz56mT6b9qowA8IgGfYRf7K5KLBnrLVY6Qx0uJJiiU=; b=akLy2Im/D1sX80jmaojAr+cu9r14BIZ9ZaFDF4axnXkPylyDEoKUVvY2ebTcNEjiSJ NndJLbsQiyHEVHv8zKyICVY15fmtfgYWWSb0AUJCUji6co+iid2bC6pBm9NTjX2uq/T/ usvLSNtG/KLLhKHf3fFetPH2dWG0DTLWeYZkQfU/4+KTyspC8rp/Vy9vD0B2Agzc1RpJ jNdsq7Jn9KlInHsKzGmnR/hFD53XTk2emFPXRmYrycEyhO+5qnJAvhBM2GpEgGiKX9Rq izL5QGipw6cODpwxVdHabLuyCVlBXhSvdcPuseZACUljj/B8fLTFSA2yAPtN6QtRfFeT osYg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@baylibre-com.20150623.gappssmtp.com header.s=20150623 header.b=qPCBIHMf; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id s11-v6si11823174plp.443.2018.04.23.05.41.59; Mon, 23 Apr 2018 05:41:59 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@baylibre-com.20150623.gappssmtp.com header.s=20150623 header.b=qPCBIHMf; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755095AbeDWMl5 (ORCPT + 29 others); Mon, 23 Apr 2018 08:41:57 -0400 Received: from mail-wr0-f194.google.com ([209.85.128.194]:46396 "EHLO mail-wr0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754954AbeDWMly (ORCPT ); Mon, 23 Apr 2018 08:41:54 -0400 Received: by mail-wr0-f194.google.com with SMTP id d1-v6so40823712wrj.13 for ; Mon, 23 Apr 2018 05:41:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id; bh=GQz56mT6b9qowA8IgGfYRf7K5KLBnrLVY6Qx0uJJiiU=; b=qPCBIHMf6t2Nos8E/hBmaW4jf8u9T9+ePVKadtWJ/LKNhe4xyp9TyqRkvWzUfj/dp1 IqbI0f8xvMO5IIFs6hFvx5bg5tEcRr1/va8LTrho14ezmI1NBv9BueAnuz5SqqFbvY60 i5C3FlJBPCjnJrB1SkitpLdVjLOW9lNIvx4ODAukdrNJsFHPmzPb7Jo4Buqn7EzE1onQ gra9n6HB2kbhlynivscwag9eaVLqazj1A7X/VhExsBQf8n+6Vfxm64bXyimjtY3rB08E 4QpqmfSyFrKMpLn8Y2g0uUVxkxhjasmt88AyBiHecb4SBAIAgdObbbn9IPlDDeRNTowU 5oGQ== 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; bh=GQz56mT6b9qowA8IgGfYRf7K5KLBnrLVY6Qx0uJJiiU=; b=DsAIFecoHXuSrJc6F9FyFjXN+URxgobGJeq3dVBOk9P/Tecqm8PMzQVw/WNMhCf6J7 qohOuDbQDtLyXgIE20NwbwXLhSKuKZgKLzZuCZJRpM6sWl+cLBJ3/dSuBrSIUmtRmvFf naiwLQUFGpIVMbGIo5n4iUt2Jo0hZSAAwJemnB95c4XKtTT51YI8VgEindyTep2a6vqf rpcADRYbH/Fvz/4dGXs3EWTZ825yvyOvVJzBYYcGih4UupSTBLt4gockqoZtL0YBACjH PhStTVwNQGQ1u+YAz7+X00LYEHyMvgC+gvdvo21ObvBCAMq4vwpWChMfgtZM+Bd9UD0P dkQg== X-Gm-Message-State: ALQs6tAypJAYqk3nKbbRjZBKGGTS343wWAnP17v+pTy4co/B1tOksQ6r 6n8AnL/L35yJge/Rax4o/qWuSn0O X-Received: by 10.28.197.205 with SMTP id v196mr9971911wmf.39.1524487312909; Mon, 23 Apr 2018 05:41:52 -0700 (PDT) Received: from boomer.baylibre.local ([90.63.244.31]) by smtp.googlemail.com with ESMTPSA id e202sm8727927wma.43.2018.04.23.05.41.51 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 23 Apr 2018 05:41:52 -0700 (PDT) From: Jerome Brunet To: Srinivas Kandagatla , Carlo Caione , Kevin Hilman Cc: Jerome Brunet , linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 0/3] nvmem: meson-efuse: add write support Date: Mon, 23 Apr 2018 14:41:46 +0200 Message-Id: <20180423124149.3077-1-jbrunet@baylibre.com> X-Mailer: git-send-email 2.14.3 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This changeset adds write support to meson efuse driver. The first patch just changes the way the nvmem data are allocated w/o any functional changes. The second patches actually adds write support. The memory being an OTP, it is safer if it remains read-only by default, which is why I also submitted this DT patch [0]. It has now been merged by Kevin. If a user knows what he is doing, it should be easy to remove the read-only property from the board DT. This can be done in u-boot, before starting linux: > fdt rm /efuse read-only Tested on the gxl libretech-cc Changes since v1 [1]: - Remove un-necessary code in callbacks - Rebase on v4.17-rc1 [0]: https://lkml.kernel.org/r/20180316145021.8517-1-jbrunet@baylibre.com [1]: https://lkml.kernel.org/r/20180316150113.9779-1-jbrunet@baylibre.com Jerome Brunet (3): nvmem: meson-efuse: remove econfig global nvmem: meson-efuse: simplify read callback nvmem: meson-efuse: add write support drivers/nvmem/meson-efuse.c | 41 ++++++++++++++++++++++------------------- 1 file changed, 22 insertions(+), 19 deletions(-) -- 2.14.3