From patchwork Sat Jan 13 11:27:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiner Kallweit X-Patchwork-Id: 763194 Received: from mail-ed1-f43.google.com (mail-ed1-f43.google.com [209.85.208.43]) (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 4C1B51EF01 for ; Sat, 13 Jan 2024 11:27:18 +0000 (UTC) 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="J5iCttF7" Received: by mail-ed1-f43.google.com with SMTP id 4fb4d7f45d1cf-558b5f4cf29so2279010a12.3 for ; Sat, 13 Jan 2024 03:27:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1705145236; x=1705750036; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:autocrypt:references:cc:to :from:content-language:subject:user-agent:mime-version:date :message-id:from:to:cc:subject:date:message-id:reply-to; bh=4h2ApuHN7PhduW4r0qWjM+0dNAEk/aKHuCc90igY99Y=; b=J5iCttF7wiHst2TjqiD4XPs7tX125I29jxPLBE/bV89w+JUao/vkDdHzx1Phvqmfx6 +Q2pNK9WrOUpAy23Wn58RFgw2ZazFgyOqmJmw4MJrnZYCcvKUexQGuvvfJZm3k6Gy0ze CiXH3kDYvpV7FV14E7LejSUV+KVQ69p8obvy7lUkttbzK1H41gWHrh706C4YOKjC4j+x kosmZkrLx0gqdOBFIubP6g+t5FCSW2IM0VZX6mCXv8qbAv9sS/F/BTplxbnTV58awQH1 egXbBnK6WoGg8JRdwBNdATqB35p4MBRK4dBdgpM5XXgbI2NHEB7ck2uoEMn6BO5FEQNa DKog== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1705145236; x=1705750036; h=content-transfer-encoding:in-reply-to:autocrypt:references:cc:to :from:content-language:subject:user-agent:mime-version:date :message-id:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=4h2ApuHN7PhduW4r0qWjM+0dNAEk/aKHuCc90igY99Y=; b=T+Vt9Z/hGI+6qZZGzbcnhcWpdMFm1crFritaGK3vQfNWULN+dUDhGnkBvjBpAk16J3 goWFKLq/MTxmk+CrkntS3UErjmCjwQbHEa+fxBOvrL9Yn830qMReT/pkzT8PDHma4Dzh qUrRYCg4+XjFpYZ/t7S3382E1C/MVuG1uSoICIYHOalx8MLwxDa74bS95FQ3FS9XV1AJ pvwCwQOFjEb/Hf0h4lYxO8bPIuYJm7T3QRLNCmeDIRo+ZzDEYWyvrEqWu0IW4lBqniDH 5ybcRRewsnsXItEOOp1slzwSMziNRLV0GBNDqDSmqdVQ2lJIjI9C2HB8uiuOcNlvnDDg tgAA== X-Gm-Message-State: AOJu0Yy+/3uee3op296QiiKuikapubLreCbkPL7uUkNDRtTXD5184K+f uROjY3g8VVrH+tJUjoaC8O4kpFpJuEA= X-Google-Smtp-Source: AGHT+IHAJe18Jk5Fjdi8kvVQ7km2HqtFczsP0JlQkmkgCA0FyYp92yCXqr5W2abLFTGuZy15cNGYwA== X-Received: by 2002:aa7:cccd:0:b0:557:523e:bd3a with SMTP id y13-20020aa7cccd000000b00557523ebd3amr1245524edt.2.1705145236260; Sat, 13 Jan 2024 03:27:16 -0800 (PST) Received: from ?IPV6:2a01:c22:6f53:1400:a4e3:d977:260a:1bdd? 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[2a01:c22:6f53:1400:a4e3:d977:260a:1bdd]) by smtp.googlemail.com with ESMTPSA id u23-20020a05640207d700b005573b375589sm2833313edy.96.2024.01.13.03.27.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 13 Jan 2024 03:27:15 -0800 (PST) Message-ID: <1fb4eb9e-6c7a-4c0c-b90e-4f53dc999b1c@gmail.com> Date: Sat, 13 Jan 2024 12:27:16 +0100 Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: [PATCH v2 2/4] i2c: mux: add basic support for calling i2c_register_spd on muxed bus segments Content-Language: en-US From: Heiner Kallweit To: Jean Delvare , Andi Shyti , Peter Rosin , Wolfram Sang , Peter Korsgaard Cc: "linux-i2c@vger.kernel.org" References: <9f37f64e-f5b8-4928-8716-6d2846c2688a@gmail.com> Autocrypt: addr=hkallweit1@gmail.com; keydata= xsFNBF/0ZFUBEAC0eZyktSE7ZNO1SFXL6cQ4i4g6Ah3mOUIXSB4pCY5kQ6OLKHh0FlOD5/5/ sY7IoIouzOjyFdFPnz4Bl3927ClT567hUJJ+SNaFEiJ9vadI6vZm2gcY4ExdIevYHWe1msJF MVE4yNwdS+UsPeCF/6CQQTzHc+n7DomE7fjJD5J1hOJjqz2XWe71fTvYXzxCFLwXXbBiqDC9 dNqOe5odPsa4TsWZ09T33g5n2nzTJs4Zw8fCy8rLqix/raVsqr8fw5qM66MVtdmEljFaJ9N8 /W56qGCp+H8Igk/F7CjlbWXiOlKHA25mPTmbVp7VlFsvsmMokr/imQr+0nXtmvYVaKEUwY2g 86IU6RAOuA8E0J5bD/BeyZdMyVEtX1kT404UJZekFytJZrDZetwxM/cAH+1fMx4z751WJmxQ J7mIXSPuDfeJhRDt9sGM6aRVfXbZt+wBogxyXepmnlv9K4A13z9DVLdKLrYUiu9/5QEl6fgI kPaXlAZmJsQfoKbmPqCHVRYj1lpQtDM/2/BO6gHASflWUHzwmBVZbS/XRs64uJO8CB3+V3fa cIivllReueGCMsHh6/8wgPAyopXOWOxbLsZ291fmZqIR0L5Y6b2HvdFN1Xhc+YrQ8TKK+Z4R mJRDh0wNQ8Gm89g92/YkHji4jIWlp2fwzCcx5+lZCQ1XdqAiHQARAQABzSZIZWluZXIgS2Fs bHdlaXQgPGhrYWxsd2VpdDFAZ21haWwuY29tPsLBjgQTAQgAOBYhBGxfqY/yOyXjyjJehXLe ig9U8DoMBQJf9GRVAhsDBQsJCAcCBhUKCQgLAgQWAgMBAh4BAheAAAoJEHLeig9U8DoMSycQ AJbfg8HZEK0ljV4M8nvdaiNixWAufrcZ+SD8zhbxl8GispK4F3Yo+20Y3UoZ7FcIidJWUUJL axAOkpI/70YNhlqAPMsuudlAieeYZKjIv1WV5ucNZ3VJ7dC+dlVqQdAr1iD869FZXvy91KhJ wYulyCf+s4T9YgmLC6jLMBZghKIf1uhSd0NzjyCqYWbk2ZxByZHgunEShOhHPHswu3Am0ftt ePaYIHgZs+Vzwfjs8I7EuW/5/f5G9w1vibXxtGY/GXwgGGHRDjFM7RSprGOv4F5eMGh+NFUJ TU9N96PQYMwXVxnQfRXl8O6ffSVmFx4H9rovxWPKobLmqQL0WKLLVvA/aOHCcMKgfyKRcLah 57vGC50Ga8oT2K1g0AhKGkyJo7lGXkMu5yEs0m9O+btqAB261/E3DRxfI1P/tvDZpLJKtq35 dXsj6sjvhgX7VxXhY1wE54uqLLHY3UZQlmH3QF5t80MS7/KhxB1pO1Cpcmkt9hgyzH8+5org +9wWxGUtJWNP7CppY+qvv3SZtKJMKsxqk5coBGwNkMms56z4qfJm2PUtJQGjA65XWdzQACib 2iaDQoBqGZfXRdPT0tC1H5kUJuOX4ll1hI/HBMEFCcO8++Bl2wcrUsAxLzGvhINVJX2DAQaF aNetToazkCnzubKfBOyiTqFJ0b63c5dqziAgzsFNBF/0ZFUBEADF8UEZmKDl1w/UxvjeyAeX kghYkY3bkK6gcIYXdLRfJw12GbvMioSguvVzASVHG8h7NbNjk1yur6AONfbUpXKSNZ0skV8V fG+ppbaY+zQofsSMoj5gP0amwbwvPzVqZCYJai81VobefTX2MZM2Mg/ThBVtGyzV3NeCpnBa 8AX3s9rrX2XUoCibYotbbxx9afZYUFyflOc7kEpc9uJXIdaxS2Z6MnYLHsyVjiU6tzKCiVOU KJevqvzPXJmy0xaOVf7mhFSNQyJTrZpLa+tvB1DQRS08CqYtIMxRrVtC0t0LFeQGly6bOngr ircurWJiJKbSXVstLHgWYiq3/GmCSx/82ObeLO3PftklpRj8d+kFbrvrqBgjWtMH4WtK5uN5 1WJ71hWJfNchKRlaJ3GWy8KolCAoGsQMovn/ZEXxrGs1ndafu47yXOpuDAozoHTBGvuSXSZo ythk/0EAuz5IkwkhYBT1MGIAvNSn9ivE5aRnBazugy0rTRkVggHvt3/7flFHlGVGpBHxFUwb /a4UjJBPtIwa4tWR8B1Ma36S8Jk456k2n1id7M0LQ+eqstmp6Y+UB+pt9NX6t0Slw1NCdYTW gJezWTVKF7pmTdXszXGxlc9kTrVUz04PqPjnYbv5UWuDd2eyzGjrrFOsJEi8OK2d2j4FfF++ AzOMdW09JVqejQARAQABwsF2BBgBCAAgFiEEbF+pj/I7JePKMl6Fct6KD1TwOgwFAl/0ZFUC GwwACgkQct6KD1TwOgxUfg//eAoYc0Vm4NrxymfcY30UjHVD0LgSvU8kUmXxil3qhFPS7KA+ y7tgcKLHOkZkXMX5MLFcS9+SmrAjSBBV8omKoHNo+kfFx/dUAtz0lot8wNGmWb+NcHeKM1eb nwUMOEa1uDdfZeKef/U/2uHBceY7Gc6zPZPWgXghEyQMTH2UhLgeam8yglyO+A6RXCh+s6ak Wje7Vo1wGK4eYxp6pwMPJXLMsI0ii/2k3YPEJPv+yJf90MbYyQSbkTwZhrsokjQEaIfjrIk3 rQRjTve/J62WIO28IbY/mENuGgWehRlTAbhC4BLTZ5uYS0YMQCR7v9UGMWdNWXFyrOB6PjSu Trn9MsPoUc8qI72mVpxEXQDLlrd2ijEWm7Nrf52YMD7hL6rXXuis7R6zY8WnnBhW0uCfhajx q+KuARXC0sDLztcjaS3ayXonpoCPZep2Bd5xqE4Ln8/COCslP7E92W1uf1EcdXXIrx1acg21 H/0Z53okMykVs3a8tECPHIxnre2UxKdTbCEkjkR4V6JyplTS47oWMw3zyI7zkaadfzVFBxk2 lo/Tny+FX1Azea3Ce7oOnRUEZtWSsUidtIjmL8YUQFZYm+JUIgfRmSpMFq8JP4VH43GXpB/S OCrl+/xujzvoUBFV/cHKjEQYBxo+MaiQa1U54ykM2W4DnHb1UiEf5xDkFd4= In-Reply-To: <9f37f64e-f5b8-4928-8716-6d2846c2688a@gmail.com> This extension allows mux drivers to instruct i2c_mux_add_adapter to call i2c_register_spd. First user of this feature will be gpio mux. Note: In order to avoid a link error we have to ensure that I2C_SMBUS=y if I2C_MUX=y. Signed-off-by: Heiner Kallweit --- v2: - Select I2C_SMBUS to avoid a link error if I2C_MUX=y and I2C_SMBUS=m --- drivers/i2c/Kconfig | 1 + drivers/i2c/i2c-mux.c | 4 ++++ include/linux/i2c-mux.h | 1 + 3 files changed, 6 insertions(+) diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig index 9388823bb..f57a4d3fe 100644 --- a/drivers/i2c/Kconfig +++ b/drivers/i2c/Kconfig @@ -61,6 +61,7 @@ config I2C_CHARDEV config I2C_MUX tristate "I2C bus multiplexing support" + select I2C_SMBUS help Say Y here if you want the I2C core to support the ability to handle multiplexed I2C bus topologies, by presenting each diff --git a/drivers/i2c/i2c-mux.c b/drivers/i2c/i2c-mux.c index 57ff09f18..ada9c764f 100644 --- a/drivers/i2c/i2c-mux.c +++ b/drivers/i2c/i2c-mux.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include #include @@ -429,6 +430,9 @@ int i2c_mux_add_adapter(struct i2c_mux_core *muxc, dev_info(&parent->dev, "Added multiplexed i2c bus %d\n", i2c_adapter_id(&priv->adap)); + if (muxc->register_spd) + i2c_register_spd(&priv->adap); + muxc->adapter[muxc->num_adapters++] = &priv->adap; return 0; diff --git a/include/linux/i2c-mux.h b/include/linux/i2c-mux.h index 98ef73b7c..ec51d9bc4 100644 --- a/include/linux/i2c-mux.h +++ b/include/linux/i2c-mux.h @@ -21,6 +21,7 @@ struct i2c_mux_core { unsigned int mux_locked:1; unsigned int arbitrator:1; unsigned int gate:1; + unsigned int register_spd:1; void *priv;