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[2001:14ba:a0c3:3a00::782]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-54223832c1bsm4261655e87.280.2025.01.03.22.19.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Jan 2025 22:19:18 -0800 (PST) From: Dmitry Baryshkov Date: Sat, 04 Jan 2025 08:19:12 +0200 Subject: [PATCH v3 1/5] nvmem: core: fix bit offsets of more than one byte Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250104-sar2130p-nvmem-v3-1-a94e0b7de2fa@linaro.org> References: <20250104-sar2130p-nvmem-v3-0-a94e0b7de2fa@linaro.org> In-Reply-To: <20250104-sar2130p-nvmem-v3-0-a94e0b7de2fa@linaro.org> To: Srinivas Kandagatla , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Akhil P Oommen , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2179; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=DP/l7Yoeg48ucLXReCMjDDAHTnXmcOLfOXPpLm9/mx4=; b=owEBbQKS/ZANAwAKARTbcu2+gGW4AcsmYgBneNLgMTBJCitDFHxA6inhG5B42VbEEbUZNj++6 XYj8kLDWTGJAjMEAAEKAB0WIQRdB85SOKWMgfgVe+4U23LtvoBluAUCZ3jS4AAKCRAU23LtvoBl uIo6D/9n2sALObvT7aq5loDvxyEKB1E+9JUzHPf84QwE7EUDospcOxH+mE66SauSJcpDHdkBg8P B3GZ8errhtXYeYYn+Lq8hgmyJ1f8k9Q508hLG73C8DU3n7/ebN81hbhdmeJhVAMIXcuF3NUczt9 5MeKcl7502oWP6+5zzaT2I6W2ylAM4rV4Pow6yGMWn94dxLVURxFudsxwMxt4Cz96oRhniBxXm1 q4y+WHVpPUJTwU2DMNmG2qBM2nBtApAqqhZX4JwNM4JWZASDSa2RerCTB0RZwPRX7j3JRKouHkR okOiCOJp7u6nys6oZKgYDKsTd1LJ46Oa+OIMlrlyINlLSUKiMC0TLBthoi0MIRkdsR4D2C744qT Nwe9s/9T4RM/5gM4q5yMkNz+NvGxq37a2txA5TKhookgEYn8kIMCvz/P/tj8xMKg34NFudHGeSm 25M6NZ2wJ/5LmosQx//Ch4FqyUxaxuKx3BcQ+2ZMvQcbho30ACLRgQ0/qoQQTcBEUKZ85lULuEY P4TORncL+erYKeBex1iNB37Cdjo0FjcRLJ0LvTdwm15kZi1RhQTXEwNIl5WT404VmEKGHM+8ikQ 98oTKw+8DkOcL7epaD30hqpf9o+WU6C5e2t1dTwewA0k2HgrUcp+VCVHOzLnsgogqOvFdQc1Ivt xlh8b4m1DDTj9FA== X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A If the NVMEM specifies a stride to access data, reading particular cell might require bit offset that is bigger than one byte. Rework NVMEM core code to support bit offsets of more than 8 bits. Signed-off-by: Dmitry Baryshkov --- drivers/nvmem/core.c | 24 +++++++++++++++++------- 1 file changed, 17 insertions(+), 7 deletions(-) diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index d6494dfc20a7324bde6415776dcabbb0bfdd334b..c0af43a37195c3869507a203b37= 0615309aeee67 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -834,7 +834,9 @@ static int nvmem_add_cells_from_dt(struct nvmem_device = *nvmem, struct device_nod if (addr && len =3D=3D (2 * sizeof(u32))) { info.bit_offset =3D be32_to_cpup(addr++); info.nbits =3D be32_to_cpup(addr); - if (info.bit_offset >=3D BITS_PER_BYTE || info.nbits < 1) { + if (info.bit_offset >=3D BITS_PER_BYTE * info.bytes || + info.nbits < 1 || + info.bit_offset + info.nbits >=3D BITS_PER_BYTE * info.bytes) { dev_err(dev, "nvmem: invalid bits on %pOF\n", child); of_node_put(child); return -EINVAL; @@ -1627,21 +1629,29 @@ EXPORT_SYMBOL_GPL(nvmem_cell_put); static void nvmem_shift_read_buffer_in_place(struct nvmem_cell_entry *cell= , void *buf) { u8 *p, *b; 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[2001:14ba:a0c3:3a00::782]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-54223832c1bsm4261655e87.280.2025.01.03.22.19.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Jan 2025 22:19:20 -0800 (PST) From: Dmitry Baryshkov Date: Sat, 04 Jan 2025 08:19:13 +0200 Subject: [PATCH v3 2/5] nvmem: core: verify cell's raw_len Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250104-sar2130p-nvmem-v3-2-a94e0b7de2fa@linaro.org> References: <20250104-sar2130p-nvmem-v3-0-a94e0b7de2fa@linaro.org> In-Reply-To: <20250104-sar2130p-nvmem-v3-0-a94e0b7de2fa@linaro.org> To: Srinivas Kandagatla , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Akhil P Oommen , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=930; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=bMUpv3/FTqnMwV5u9s/COuv1xw/6j5RQN2haBUShGuQ=; b=owEBbQKS/ZANAwAKARTbcu2+gGW4AcsmYgBneNLhNpEaoF5/Nu4xiwe+9PdqReWSOtYGSpP6l XXWZDC+fmiJAjMEAAEKAB0WIQRdB85SOKWMgfgVe+4U23LtvoBluAUCZ3jS4QAKCRAU23LtvoBl uBaaEACz+dBHD0fxgsvnk2YlNABSiPbK8CM0Y4w+Jnl0u2d3HZDzeeWqFpbE3CIkh3ddqXrVCNm RZRk+ew2A0cMQu7YqoL4LOJOekVeTPaBjwFetRYDkAxwpUeza4PNC1exBhtbUOwm8vd8Qt3I2oh SHUxSRGCQzBkVpaEdriCCZNFCNEbmmGKfteuyHXkqc1ahCg/Shspib9Syrxt2xOxdu9f4rFDOBl 1DUuiaA4BBgDub/ajxrvqmw3UvWxBLyiLIEnAMX5XMmEY99tynDU39JXQvPGW/hJN868xPV/uY6 bYN5tdXKmXt/lWzbc0B+mnuvnzLYA+IqUkt85EGYOAaJLcXJb+12/Bht4Zp5PuXYjaU9fBP8wPt 6ygwrY4v5IJ5cul21nEOuu9Nsxo7pFO1uL2sIRYw8YgZoFU9+U9Qu3OH8G71jOKpU2NT4Vyp0an vymYLKImJoBUouukIUIYtZkmFwRJkM0E8cfkPKrpd9XwZehTAdyV7PRuhzUIJSDQgIHPF+LC9Qz 3HpzbWjGi2iNv5PsI15JelppbYVaf7VJVKe9+MWz21quq1Q4bF7sUTfJn2f7fNaU09CVRSAhXik j23xQ5FCI2wjg56n9riI8EMdqjhHpp1MGN36pWPUiA+K723Hr4kQ+HtSYBPYVBlFp8+keDp6CvX CESGjJFTn0H9g2w== X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A Check that the NVMEM cell's raw_len is a aligned to word_size. Otherwise Otherwise drivers might face incomplete read while accessing the last part of the NVMEM cell. Signed-off-by: Dmitry Baryshkov --- drivers/nvmem/core.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index c0af43a37195c3869507a203b370615309aeee67..a03a3006bd611ea6e91703cd19c= 2842bd4f56659 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -602,6 +602,14 @@ static int nvmem_cell_info_to_nvmem_cell_entry_nodup(s= truct nvmem_device *nvmem, return -EINVAL; } =20 + if (!IS_ALIGNED(cell->raw_len, nvmem->word_size)) { + dev_err(&nvmem->dev, + "cell %s raw len %zd unaligned to nvmem word size %d\n", + cell->name ?: "", cell->raw_len, + nvmem->word_size); + return -EINVAL; + } + return 0; } =20 --=20 2.39.5 From nobody Thu Feb 12 21:46:55 2026 Received: from mail-lf1-f48.google.com (mail-lf1-f48.google.com [209.85.167.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4B5DE156C76 for ; Sat, 4 Jan 2025 06:19:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.48 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735971567; cv=none; b=aapi9sk15Syg/4puAz2g6jRo2dgy+xm3K7Z0Lmoq18bBUivS2kIuAsjE0nmj8Syei8gvG2UAZG2HxDUa+8H/B7SkKJA5TZ7gOPBnwmijAsDIirCtyB0VO5jDBDmg722T7eeNCpv89tAxRtizR65wU3u1Xk5R3+L7n/JqK8eXhPE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735971567; c=relaxed/simple; bh=sGP/szOES38d6mStd7Xz/BDPgQX6Jo4hmwT1BUTmpOs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=gjofdM+5efGz2HWSSd26qY7k6Z/aJL1QP3yYo9s6F/SwBRel4TUswBdFuo44im+G3mu8qD5GPY04jzGsG4SfEXceRtnAqDaTsuTfRRvUgbFGR0AxMxTVlj6d4UH0U1UU5uxt2v8HpEo6nEukgZmWRnbD4tsKke0SEtYnoXvFhtg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=aENNKscR; arc=none smtp.client-ip=209.85.167.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="aENNKscR" Received: by mail-lf1-f48.google.com with SMTP id 2adb3069b0e04-53e399e3310so15522553e87.1 for ; Fri, 03 Jan 2025 22:19:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1735971563; x=1736576363; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=ZNBBuqUNiSerF8kPaEtDmkW48TvvfeL/ZUEeQFP+MhU=; b=aENNKscRUCm+oyE1NpJ4Tp1uYaTeHsrm13WQ0xzqXyd0n46m2D7cFOYO5eZTjAkP3W ByPbXonJkLSp6QLj/6+w22/wRVCz9p34jHqMY5E9axspMpQMBnXAwC8nduIfUcQm5XOD b+GXOVt1plW9B+m2NPYJ9W2C7CQ4GcmFqDZxtD0Loa5jt4NQJUTRpnjFN+RAZIyNVJBc sW4RRqBrgiMP+FPYt5d34c5oxWuYPMMGxcfBDZhieoMRIiNv6u5BsEWl6JgJAFkJfjU8 4d/tt+EtjBoOcuVJsEAIFXn8+snKESY/E7/igF+yUlGEkpntmHa0xfAxOmIo5BiI7o63 yTTg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1735971563; x=1736576363; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ZNBBuqUNiSerF8kPaEtDmkW48TvvfeL/ZUEeQFP+MhU=; b=mlfzca3IKELgh7zZqfMvzF4kMFkBJ0bELOqzV8GNO/tvjyxTzHqKQksq1YnmoS2cC4 ggYmn+yrU+aczrEgPmUoJZ1kbo7PTD+zO9GUlU2ZexBjAxrj//XnFRDd1jBayMGz5rpz lUkhSVzgaEu45rLytpXU9djMrODEoUHDwAEiVIqMx/AoT3KJD0SsNcep7zXzG9Itt23h VG9cpoNrJ8ZiiQIT6buuPq5maGhF2rRGrwkEyI2ixc8vlDgPxhKdoexGvkqFMBQzsbDI RIdhdoff13iU1XE0N6jNgL7lOsfNGmTmUS3/Yg3KLIYk2OPja6Fi5o5i++tYGnWhI+y2 bEew== X-Forwarded-Encrypted: i=1; AJvYcCXmFwIGKCEiUeBwNupzHU61EIyBB8RI4K+RdH7fu0sL9TiBRKqUVl7uDzxLmT/Taxb/uSKCli6MCI00ogE=@vger.kernel.org X-Gm-Message-State: AOJu0YzuW523ZRBENv+70jkfKhQ6p6k82YUS44LaPITAAqlSoyDKNxN+ 2yhiYByWxi5tGWxou1UapaYqPrJgsGFwxHeiDcIXD9CJc/y4O0J0KZ5k6fYawlQ= X-Gm-Gg: ASbGnctKRN1KkuN/0BTfqnUlaJ0fjWKHknR6TmXcB3h6Lc5AqQMmBYhFfWzq+LQg0Us gvs6pRinQ+Gc5oahazjRNTQHlum2SXitlQAYr1QTZ+kLoLRMxGDPLwdj4A6fB9fPVFhhGKFuNqw VNWOrs+JEGcRY8jbLoKgSJQXKuXPIfnYQwCkcTD6W5RWMh7iEHMJ+C8h8ARVqv/Dv8lMDposgB3 9oAt4iXDku7ij5UX7cXmM0NvTt4vZ62EyMATPiELVESICaai6yE5Dkots8XWZ5bWA/EuwmMBfah AAtGfsiRjaio67JmJqXt2OQO X-Google-Smtp-Source: AGHT+IGZzBjoPqp8zB7YtaJvtnPfNwQjVbPCbpOSeyTRDGEni5rygswYpBQTFVQmeI6IzffnJ81I9A== X-Received: by 2002:a05:6512:1296:b0:53e:368c:ac48 with SMTP id 2adb3069b0e04-542295229femr13726743e87.11.1735971563406; Fri, 03 Jan 2025 22:19:23 -0800 (PST) Received: from [127.0.1.1] (2001-14ba-a0c3-3a00--782.rev.dnainternet.fi. [2001:14ba:a0c3:3a00::782]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-54223832c1bsm4261655e87.280.2025.01.03.22.19.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Jan 2025 22:19:23 -0800 (PST) From: Dmitry Baryshkov Date: Sat, 04 Jan 2025 08:19:14 +0200 Subject: [PATCH v3 3/5] nvmem: core: update raw_len if the bit reading is required Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250104-sar2130p-nvmem-v3-3-a94e0b7de2fa@linaro.org> References: <20250104-sar2130p-nvmem-v3-0-a94e0b7de2fa@linaro.org> In-Reply-To: <20250104-sar2130p-nvmem-v3-0-a94e0b7de2fa@linaro.org> To: Srinivas Kandagatla , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Akhil P Oommen , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=988; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=sGP/szOES38d6mStd7Xz/BDPgQX6Jo4hmwT1BUTmpOs=; b=owEBbQKS/ZANAwAKARTbcu2+gGW4AcsmYgBneNLhnI1BmYlLUpy4fF+XLb8R2QFmSkEfV5UmG /LjBx6bNX2JAjMEAAEKAB0WIQRdB85SOKWMgfgVe+4U23LtvoBluAUCZ3jS4QAKCRAU23LtvoBl uGRmD/9bD0kbhu5WeN4Ztgm4a92xL0AeFcVDBzoOR6adZJs7p9cQhPJUPOgjs8G+REiMml0HYdk 04+xsExMBEtQgSHm/hTMpJhkDg3jI5D90ytAVW1MPRfx8AMnwABLVtsZxl6APE4AwT16VNMOE28 T4UKxIfkdjS+wkxKUDT8FkvQ06h9E7d+1biBPSJhPinRcPmDv6asN81gR01/ulXKOJlOivRms+B khi6g/xLcF82i16A+EVfOCEemf5jqYKj5tv5G1tM4OsCKPH9ptS33l9FRJTtoVmfWw+iQVnVyFj ZXVQJlrYtenhJiV1nHZ60iK6FlpfGmMJAjQuXI9c8tLfqbXMCYwiGpqDc0HLhWGv7qHnDDnUh/l z4FQgMjhVHOyQaAfJ74NNyyLccBJZ6YQPilIpy0qN5yxHDaoa6fKUeObYqfSxQqEEahb31Icjnt F602eTkkoxGQCy6nyqoDDq3hSrKu00M3fYrE4Z8APsTvOqq9b690QAVBlGVfP3MlZ2EBYs/ybGO x4RlurwWAw0xmjFnaVZ7RTdCoJL3Wpc+egBXhO9/kXfNC+qlETJ56Ek3OMHbcO8NAVWt2qj9Q+n aUiUreS9bjgfmLrtmoQLkOg92ZsD2KUVBOuLmZhltbKnlT6DavoQQhEm3HdEHTI5s0NwzBgBaxK jh6suB/pYTS3AAw== X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A If NVMEM cell uses bit offset or specifies bit truncation, update raw_len manually (following the cell->bytes update), ensuring that the NVMEM access is still word-aligned. Signed-off-by: Dmitry Baryshkov --- drivers/nvmem/core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index a03a3006bd611ea6e91703cd19c2842bd4f56659..17b320bcbe207aed8a32aa2cc7d= 8dab9b58c13cf 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -591,9 +591,11 @@ static int nvmem_cell_info_to_nvmem_cell_entry_nodup(s= truct nvmem_device *nvmem, cell->nbits =3D info->nbits; cell->np =3D info->np; =20 - if (cell->nbits) + if (cell->nbits) { cell->bytes =3D DIV_ROUND_UP(cell->nbits + cell->bit_offset, BITS_PER_BYTE); + cell->raw_len =3D ALIGN(cell->bytes, nvmem->word_size); + } =20 if (!IS_ALIGNED(cell->offset, nvmem->stride)) { dev_err(&nvmem->dev, --=20 2.39.5 From nobody Thu Feb 12 21:46:55 2026 Received: from mail-lf1-f45.google.com (mail-lf1-f45.google.com [209.85.167.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 323AF15B12A for ; Sat, 4 Jan 2025 06:19:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.45 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735971569; cv=none; b=eJ0tBC9g8O6l8I8XLuN782ngbVJ7y6PvgwtvzXSJ8zeNmeeN2fGACIIRtRIsXIKgfBXn3lb0GR3zULeC++kquE+cjkqTGlPXaEgM6jyIVbm/eIQFKOusDnG/FzsUqFjpLV30yRYDzUo09lmyuX2bRdeUjahN9udxQVMLlbdnSVE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735971569; c=relaxed/simple; bh=Weli6Ud1pnhnVMQNhXbarzN29phyH4B6NUF7IDp6kk8=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=AFfIixzRh5rds7OcgzM1WSYgbo9zvZYsYre3WjSSxDU0sjHQ1huiQw8w6bmpGkKcrCBGJVfQf9iclJaH4BEl8PHev50WHOPn5S3Z1zJA5JFx+Oh/ytB/1HGc1a+QbIrcDkBiaJCIlM7gT9iXVLls73itMjqLk0f61Qwu626sJbk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=AJVjP2qc; arc=none smtp.client-ip=209.85.167.45 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="AJVjP2qc" Received: by mail-lf1-f45.google.com with SMTP id 2adb3069b0e04-53e3a5fa6aaso15301553e87.0 for ; Fri, 03 Jan 2025 22:19:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1735971565; x=1736576365; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=lOzuf/LkISp9KTJoorQzqPXBIv79BHB/w9fYq6gMhqs=; b=AJVjP2qcw35zsLvKYw80NFqEfwLDwQmm4MKq/S+OMI2lT16kuNqMHMcCXlPMz9bZs3 +jem+LoJJ/a9bJFBVY+S/Y/vWz1L7aoIxpKOrwe2/nkp9k4//UzHiPMEyGcWqURLjuYQ ZaZwYnUYk0vuCjzjXiQY5xCqP02LUPNWR80VwHuETIBVMekhYm3G7KmaosuFQ4qMkWmq q7t0SJwaw3Bg2mwul9pqBB12VpNk6t1P4uKviT8NSftBqz+ifvHhfr1IuOce541VkTIc 6NxE5L3NnZI/Qo9agDEy9bDO529i+efN8q5qtxdu+mcdGb5lQqW50relfCIR4Bv9AU/e sCHQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1735971565; x=1736576365; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=lOzuf/LkISp9KTJoorQzqPXBIv79BHB/w9fYq6gMhqs=; b=Pg+wuUcM76RZDRK+D2m+vp3NL0ikwUU+/4EtvHpyfxoI/Y+5P9XPsiNN3YAJR2w5Sl /mR2ddWkBD4Kpd/pfZ2vr9452HSjYglMz6maBHhqBljK0P70hKFrhmsjPFnbZj44dkI1 E6lBRtXsgHDrRPAvWf+P7peoRfiWb/KDYkOM1BZL5ivXtI9zUWinnAPXVOJ8GecXXsj7 sh/pshLmDHe25SrcWuGtPCxfTyB2UHYb6Msoy1j/agA2utXdejXu64vSiywfoY9as3Oe NvnZUhYYJlgeB51ovQxl7vUJbm65YtcZMikaEVRKuYPyCWvjb6BTNBy/8oNm9KJQ+UbG I1sQ== X-Forwarded-Encrypted: i=1; AJvYcCXWIqg9tosvQPV2OrN4YEdEI9rZGuBJLRnoCtzZMUQ+WO4kBdphTBeclaJyxhAktclVwqQG28Ws6mFL0tg=@vger.kernel.org X-Gm-Message-State: AOJu0Yz01iG+WdXjmZALxSlLQh2jTXildydQCLAYQgj9yz4KBCTrX3O8 +yykSOc0HVSZn0IrdrtCazcUac7ejj/naPZ170kya1q/rPtFXJNWbU+8w+h6xs4= X-Gm-Gg: ASbGncvYLLIShi9TBy4TJm2IY/KorZiF/H6t187v7DmGVhd4FG+8lV6WwvbTBbOQnek aki1UKUsRahfrsoagHuyjCUewdj3BskSD1jAq/6Q0Jchai38EX7TkVJz+oeL8y9G7ODUhsjBOav eo3XFVCAzS2BMK1abKxMyR99tYdaEmkmI0mIbJfF5l34jS/I5RZCGmYHXxzxkUPn7ylfdilSZgj Y2DkgwdQueJlUs/c+ZTV4WSn29x/MO6L7ByAAeFryZ6M5DN7oDsRkW4HWM5ZLmGvcsRk+f8PZhS CDwGYNlH11on140/+ObdP0uT X-Google-Smtp-Source: AGHT+IHL2VelCgNOIT9/FMsBwJLg9t+d4xtQTqvnLPBHV2vCq6f/LkoocSVFDCMc5uLGfONiqmFJZA== X-Received: by 2002:ac2:4c56:0:b0:542:1b97:3db8 with SMTP id 2adb3069b0e04-542294256edmr14830575e87.5.1735971565446; Fri, 03 Jan 2025 22:19:25 -0800 (PST) Received: from [127.0.1.1] (2001-14ba-a0c3-3a00--782.rev.dnainternet.fi. [2001:14ba:a0c3:3a00::782]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-54223832c1bsm4261655e87.280.2025.01.03.22.19.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Jan 2025 22:19:24 -0800 (PST) From: Dmitry Baryshkov Date: Sat, 04 Jan 2025 08:19:15 +0200 Subject: [PATCH v3 4/5] nvmem: qfprom: switch to 4-byte aligned reads Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250104-sar2130p-nvmem-v3-4-a94e0b7de2fa@linaro.org> References: <20250104-sar2130p-nvmem-v3-0-a94e0b7de2fa@linaro.org> In-Reply-To: <20250104-sar2130p-nvmem-v3-0-a94e0b7de2fa@linaro.org> To: Srinivas Kandagatla , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Akhil P Oommen , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2302; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=Weli6Ud1pnhnVMQNhXbarzN29phyH4B6NUF7IDp6kk8=; b=owEBbQKS/ZANAwAKARTbcu2+gGW4AcsmYgBneNLh+pWuyicpF7JwINd5cxvcSYzG01R6FRlle hKcTcxue62JAjMEAAEKAB0WIQRdB85SOKWMgfgVe+4U23LtvoBluAUCZ3jS4QAKCRAU23LtvoBl uFQ1D/0eitlPWKeOQfigM1W6o1iU/oO/yWjCv7h42icKzawH7fw+evIC35b3Pfv+UhxQYvlPoI1 ZYKMgZUFDXU0RArciTtvD5hhjevdOSY6MgQL113UCgDlxfGs/djsxIxj5m4sUKIs3fyZUGjmgVW TajAv26H8istC0y7hfpfwa4ogk2pq5xdv17p+uBWBMDUjAbRxub5N1zA2kYUHHIIqcWo2YdHo56 gexH/TQ03jxOiKdnAyyTGDn+EscyiOe+sOeoHkXjJObaaeSybCWTKmaYs+WQCKBTjNq+0eGoepj Lcz9qH7Tv/ZXb+JB5sCJSi3jRqBhrR1Pepfsmdx7DmQjYa58sy4DGS0blg6qfQLeRBcPkt/dns/ ZFwoV0z2Th+mgLHBlYwmTpix1YEn3v4Fpm1clqsDqQQImH5pZIuJsJ6LCD2ciVa7kEU2GtROobn rFGtVFG/M29Wq1bzNOga/5BPRnXFQmcF74KEaBwWRxfewSqeWj+t4P+w0TbVSDtFSTMqIUK/VkR N6u50Mu1gE5wZV/xUGTIqbqzwMjLfb0zdM5MnKiuS0OU0FPt5BvCHKr+ZT3W7JqsqnkhF3l1GKa AnQDGIlK3OmtDoyNDGgxj4DofIlpNseoNg9TFxP9HTVR4kwPI9seli/hgIHxqXpf8Wzje7ZJygu ZHRfUV574Tt4T9Q== X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A All platforms since Snapdragon 8 Gen1 (SM8450) require using 4-byte reads to access QFPROM data. While older platforms were more than happy with 1-byte reads, change the qfprom driver to use 4-byte reads for all the platforms. Specify stride and word size of 4 bytes. To retain compatibility with the existing DT and to simplify porting data from vendor kernels, use fixup_dt_cell_info in order to bump alignment requirements. Signed-off-by: Dmitry Baryshkov --- drivers/nvmem/qfprom.c | 26 ++++++++++++++++++++------ 1 file changed, 20 insertions(+), 6 deletions(-) diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c index 116a39e804c70b4a0374f8ea3ac6ba1dd612109d..a872c640b8c5a558da9ea00e380= 4c904f8987247 100644 --- a/drivers/nvmem/qfprom.c +++ b/drivers/nvmem/qfprom.c @@ -321,19 +321,32 @@ static int qfprom_reg_read(void *context, unsigned int reg, void *_val, size_t bytes) { struct qfprom_priv *priv =3D context; - u8 *val =3D _val; - int i =3D 0, words =3D bytes; + u32 *val =3D _val; void __iomem *base =3D priv->qfpcorrected; + int words =3D DIV_ROUND_UP(bytes, sizeof(u32)); + int i; =20 if (read_raw_data && priv->qfpraw) base =3D priv->qfpraw; =20 - while (words--) - *val++ =3D readb(base + reg + i++); + for (i =3D 0; i < words; i++) + *val++ =3D readl(base + reg + i * sizeof(u32)); =20 return 0; } =20 +/* Align reads to word boundary */ +static void qfprom_fixup_dt_cell_info(struct nvmem_device *nvmem, + struct nvmem_cell_info *cell) +{ + unsigned int byte_offset =3D cell->offset % sizeof(u32); + + cell->bit_offset +=3D byte_offset * BITS_PER_BYTE; + cell->offset -=3D byte_offset; + if (byte_offset && !cell->nbits) + cell->nbits =3D cell->bytes * BITS_PER_BYTE; +} + static void qfprom_runtime_disable(void *data) { pm_runtime_disable(data); @@ -358,10 +371,11 @@ static int qfprom_probe(struct platform_device *pdev) struct nvmem_config econfig =3D { .name =3D "qfprom", .add_legacy_fixed_of_cells =3D true, - .stride =3D 1, - .word_size =3D 1, + .stride =3D 4, + .word_size =3D 4, .id =3D NVMEM_DEVID_AUTO, .reg_read =3D qfprom_reg_read, + .fixup_dt_cell_info =3D qfprom_fixup_dt_cell_info, }; struct device *dev =3D &pdev->dev; struct resource *res; --=20 2.39.5 From nobody Thu Feb 12 21:46:55 2026 Received: from mail-lf1-f48.google.com (mail-lf1-f48.google.com [209.85.167.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AA80E17085C for ; Sat, 4 Jan 2025 06:19:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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[2001:14ba:a0c3:3a00::782]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-54223832c1bsm4261655e87.280.2025.01.03.22.19.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Jan 2025 22:19:26 -0800 (PST) From: Dmitry Baryshkov Date: Sat, 04 Jan 2025 08:19:16 +0200 Subject: [PATCH v3 5/5] dt-bindings: nvmem: qcom,qfprom: Add SAR2130P compatible Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250104-sar2130p-nvmem-v3-5-a94e0b7de2fa@linaro.org> References: <20250104-sar2130p-nvmem-v3-0-a94e0b7de2fa@linaro.org> In-Reply-To: <20250104-sar2130p-nvmem-v3-0-a94e0b7de2fa@linaro.org> To: Srinivas Kandagatla , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Akhil P Oommen , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=866; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=bFoUxd13xqGzTL8i0Uke1VWxv8nz0uckVKpDL5fYKp4=; b=owEBbQKS/ZANAwAKARTbcu2+gGW4AcsmYgBneNLi6C4BN5w07vW1+FlSRUwGypwxOyvceoOsm wD8QJUyaAqJAjMEAAEKAB0WIQRdB85SOKWMgfgVe+4U23LtvoBluAUCZ3jS4gAKCRAU23LtvoBl uG7LD/9Y+ossUhXg316WNkGflavyebf51WMudywcI05PSIjNbdoupaXq4xN/qroZXsnUOxLr/se b1PQeBMen7GSiUInRXZ0Qs1fWqEM5CkK6IWJjCpsdx44eWjgcpx98SSxNyFPN0B8u8o5wb53H5c NtPUFZUmWmq+okJC1QeLuDmaCdSOQGH9dbuqCpNelnxBl38jrbKCl7eHHGcksRzkK7RfMQjG46L tOYjDcnwgtXsw2Z+PA4isr87lpsn75hq+iOzbtyffNZciJxroXUhzkXxf8ZhaAOUkuzjR+6iP3w 2mziN5r9jEwdlHZtD7bEKiytNrvYhxtijdiO9/m//sRdYfB26pdM/XfdTa9MIwBh45rrvQmZg7R lk3lzaCAYzyAWd3OzbGE7+xAodFP7K6bqEe+kHZEtPxrGbNm9BQ4WP2xMOGCrUA+olUmjKiMbBA s+rvyX7W0MdDnkGH/ZK5/qbWdrm6N8D46VrFQtMraJ1EymzgxBx1kIHzAR2n7Qw3yAq1KfCvU6B D6S/9+ZpBYug9JNrkGWUpA3gLNrUXUzA+peOBuFW1qnGy/n7r3jr+Q+/+SX1wSUhdtqnQoiX7Ey hc2AJfnwgSC1a/ZAEY2L22HLuz4umZZXYsavbsekqeqM2hF13/P+YRng88DcUHxVKPr82lYdF46 ua8cgAAIcdKPNuQ== X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A Document compatible for the QFPROM on SAR2130P platform. Signed-off-by: Dmitry Baryshkov Acked-by: Rob Herring (Arm) --- Documentation/devicetree/bindings/nvmem/qcom,qfprom.yaml | 1 + 1 file changed, 1 insertion(+) diff --git a/Documentation/devicetree/bindings/nvmem/qcom,qfprom.yaml b/Doc= umentation/devicetree/bindings/nvmem/qcom,qfprom.yaml index 80845c722ae46611c722effeaaf014a0caf76e4a..9755b31946bf9d4c1055a993145= d06c274b61a37 100644 --- a/Documentation/devicetree/bindings/nvmem/qcom,qfprom.yaml +++ b/Documentation/devicetree/bindings/nvmem/qcom,qfprom.yaml @@ -32,6 +32,7 @@ properties: - qcom,msm8998-qfprom - qcom,qcm2290-qfprom - qcom,qcs404-qfprom + - qcom,sar2130p-qfprom - qcom,sc7180-qfprom - qcom,sc7280-qfprom - qcom,sc8280xp-qfprom --=20 2.39.5