From patchwork Tue Feb 18 13:10:39 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Viswanath X-Patchwork-Id: 867582 Received: from mail-pl1-f174.google.com (mail-pl1-f174.google.com [209.85.214.174]) (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 6A0DD246353 for ; Tue, 18 Feb 2025 13:10:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.174 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739884255; cv=none; b=h1pf8vjZm1GNm0c7cO6HrES0AkXTZd/AlNA+KwZuXLeybM4ImrPlCgjpFs+Ox41jKMjCbpuJLYVOa1khcojs+fzdKMNJREkRJnvs9hIz0y4ZdIwLnuNwRt5XRm9dYCGyPZ2Mb08Vb60Im0VLGxtNw7gP+lyWv0tCIX/MpYh/dZI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739884255; c=relaxed/simple; bh=7sgFu+7FehmedZrCBn7qAyffQvuCBbFulPRIYm9nFhM=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=SE0nLTxw3YAyqrw1hS7SyDmrEiXZYqHDGYkabUEjzIm20j8Lp2I9+LmPdZq4BgVSTnsYcPrVYgZlU3LWijnHWlIWZ3UbE+O4wNT6velHg8UQiZKEmqe/Dg2OmdJwDOp6bYewrX/d/7AaaPwBPIAbeFhu6pT1m3Y57IiUVA1+jm8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=LWlMFl/M; arc=none smtp.client-ip=209.85.214.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="LWlMFl/M" Received: by mail-pl1-f174.google.com with SMTP id d9443c01a7336-2210d92292eso76093395ad.1 for ; Tue, 18 Feb 2025 05:10:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1739884253; x=1740489053; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=IfhqTBus3xDwbZNLdmi+ftLFmbq3S7q0HQcR7EyOJ4w=; b=LWlMFl/MzYqLiOW9JGDgMnoniqGEW8rb3gbBw9xXCdgUEzcoSC5PwCV8AsyO7+AM6i 492A3HCVrTX9kv8bxURDeS3OfJoCx1ZKyKV/pRU2GkCbc4/jPkIKVgO4PoDmoYO0CAPA eLnfBUw4Rh0XO2KEPdBNHsrN1/FW3iJ1S/V4OY6iLpHoa1NiSXTvlQFlPbKowX1gvGqh NPqHcW9OBmLckD23/DzQ0ZMViQswx2YB3CZxDku4V7Xgytv0REDrqJ+GccVmZd3WHCUh E0yxnd1krnnwin20E24y9OHuk1AwcVp20Ybqbz8cqCxL8b8g58Gof2r9KFS0MEN2Jdcz CdhQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1739884253; x=1740489053; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=IfhqTBus3xDwbZNLdmi+ftLFmbq3S7q0HQcR7EyOJ4w=; b=D74IOzTrx2gSxe2ZiVh0BBU3W5JexQMDHcSIN3pREIPKAS/1Yr+1n3dnJY/6r8oXY3 fTlCz8l2dn1/Qxx8W8O67ffEWh9RQFlJfx3W60aV6rGR6Jiv6/MOL4wbK1xxzXD9sMJj BGEAQWgc6wTzfenYT/RZvZHtjmP+ZeSE6uQiZWcwOL1PgpkACrROcdsMagySU9ycMKbG RDXhKZSuJJ5UAigHpY4Qf2NNd+0lKOeI2JN2eAuxCSsDLqUt1ovaoQknhAQPND6sKiLq sUph5/W7xT1SpZCaiq17DX02sZtS9ZSqXylNB3reVAPu0udqiMrdFlzWPigP7DBgXDiR dt8Q== X-Gm-Message-State: AOJu0YxW1tKk3V0md2ClvQHtMnclUJgyhvODep7GyRXbrrVKe7ShLTor O+tFHZ9K265I4lOjskBduyF+M1JWrRphXHwhToJFhAQOGshPeplmLh2o6hqP X-Gm-Gg: ASbGnct/esTKIfSK4JQaCRbmyXxSHI9f1mLt1CgUZTeODmbuT19SBfqtdgdybYnk4pP MJs62zviKKgjWk/16V82UeCWEtGNvH1cZTO9PcxvjfqVD4hDlvEVcRwLaLCUf4v+9F4wET//SjK Yr6AP0+/+Wzft8kSrWoOpidJ7ljPbDWTmHN7nlxmcJrN3UrrMuBISoH5lTEcjtU7Unu6OdEtU52 9MmsoBS7QkMwq60pqPZjRTMc4EzwMVG1MdYVy7IIJqW4JT4MykcS3F6EQoj2LeSbYodiu2ZOplR RQQKPs8tsWrxYTiGvHUqNPotJGZrQRrhBSaT4md+qcP24gk= X-Google-Smtp-Source: AGHT+IHEzId+F9Y/qcM2OvpwjCy0XxzJJ09b+HzFyA5pIuKXmDoAXMEnOESvreJXejyCFW2CYlJgCw== X-Received: by 2002:a17:902:e546:b0:220:ff3f:6cc9 with SMTP id d9443c01a7336-221040d6c64mr241376085ad.48.1739884253126; Tue, 18 Feb 2025 05:10:53 -0800 (PST) Received: from LAPTOP-HLGLEP2K.domain.name ([223.185.131.235]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-220d558fe3asm87815765ad.234.2025.02.18.05.10.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Feb 2025 05:10:52 -0800 (PST) From: Viswanath To: linux-i2c@vger.kernel.org Cc: Viswanath Subject: [PATCH] i2c: Update i2c_msg documentation to clarify write Date: Tue, 18 Feb 2025 13:10:39 +0000 Message-ID: <20250218131039.1344-1-viswanathiyyappan@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Update I2C_M_RD Documentation to clarify that not setting it signals a i2c_write Signed-off-by: Viswanath --- include/uapi/linux/i2c.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/uapi/linux/i2c.h b/include/uapi/linux/i2c.h index aa751389de07..07cc80e9e854 100644 --- a/include/uapi/linux/i2c.h +++ b/include/uapi/linux/i2c.h @@ -21,7 +21,8 @@ * * @flags: * Supported by all adapters: - * %I2C_M_RD: read data (from slave to master). Guaranteed to be 0x0001! + * %I2C_M_RD: read data (from slave to master). Guaranteed to be 0x0001! If + * not set, the action is taken to be write data (from slave to master). * * Optional: * %I2C_M_DMA_SAFE: the buffer of this message is DMA safe. Makes sense only