From patchwork Wed Mar 27 08:33:55 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Paul Menzel X-Patchwork-Id: 783332 Received: from mx3.molgen.mpg.de (mx3.molgen.mpg.de [141.14.17.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DB2B1125C9; Wed, 27 Mar 2024 08:34:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=141.14.17.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711528456; cv=none; b=DX7bjHOzxBFtOqpm16rYb0krxtE9R7IbpOu+WTV7CUXLpNeLM/7Y4KWNv+poEZBFUtVTc01xr2tw+58unX69jKtxfYeTybzARsOqcHlGTwM7WkJLwAk19b7t7IMXF9ICiQI1WuLyiko3slonhlo+LfsOUvKuJYtfnNniPER3GKU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711528456; c=relaxed/simple; bh=UGvZxVMikB6qaCnJ2KKhOrkVnVs1RqwYKNO6LJX6940=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=msP3pHDyjb6JvkCo0ZAzFshCkuIq/sQd+xSRaVialcuokxkX5wkkVveXPFwcAWCPxfiNXDFneAyhew5ZVP0/oQNSguQf+S9XwlykvRK9uQX08khnpwTD/EsKvvx0Cj2bKUTPCUfNyTZqyEMJRW9qMCAcal5BpxZZVylPW6lri0M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=molgen.mpg.de; spf=pass smtp.mailfrom=molgen.mpg.de; arc=none smtp.client-ip=141.14.17.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=molgen.mpg.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=molgen.mpg.de Received: from localhost.localdomain (ip5f5aedba.dynamic.kabel-deutschland.de [95.90.237.186]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: pmenzel) by mx.molgen.mpg.de (Postfix) with ESMTPSA id 86C4561E5FE06; Wed, 27 Mar 2024 09:34:02 +0100 (CET) From: Paul Menzel To: Wolfram Sang Cc: Paul Menzel , linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] i2c: smbus: Add (LP)DDR5 types to `i2c_register_spd()` Date: Wed, 27 Mar 2024 09:33:55 +0100 Message-ID: <20240327083356.74246-1-pmenzel@molgen.mpg.de> 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 On several systems Linux logs: i2c i2c-0: Memory type 0x22 not supported yet, not instantiating SPD 1. Supermicro Super Server/X13SAE, BIOS 2.0 10/17/2022 2. Dell Inc. Precision 3660/0PRR48, BIOS 2.9.3 11/22/2023 3. Dell Inc. OptiPlex SFF Plus 7010/0YGWFV, BIOS 1.7.1 08/11/2023 4. Run `git grep 'emory type.*supported yet, not instantiating SPD'` in the repository of dmesg reports for various computers collected by Linux users at https://linux-hardware.org. [1] Add 0x22 and 0x23 for DDR5 according to section 7.18.2 (Memory Device — Type), table 78 in *System Management BIOS (SMBIOS) Reference Specification*, version 3.6.0 [2]. I use the same name as for DDR4 out of ignorance. [1]: https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.6.0.pdf [2]: https://github.com/linuxhw/Dmesg --- drivers/i2c/i2c-smbus.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/i2c-smbus.c b/drivers/i2c/i2c-smbus.c index 97f338b123b1..0d67a95c0599 100644 --- a/drivers/i2c/i2c-smbus.c +++ b/drivers/i2c/i2c-smbus.c @@ -308,7 +308,7 @@ EXPORT_SYMBOL_GPL(i2c_free_slave_host_notify_device); * target systems are the same. * Restrictions to automatic SPD instantiation: * - Only works if all filled slots have the same memory type - * - Only works for DDR, DDR2, DDR3 and DDR4 for now + * - Only works for DDR, DDR2, DDR3, DDR4 and DDR5 for now * - Only works on systems with 1 to 8 memory slots */ #if IS_ENABLED(CONFIG_DMI) @@ -380,6 +380,8 @@ void i2c_register_spd(struct i2c_adapter *adap) break; case 0x1A: /* DDR4 */ case 0x1E: /* LPDDR4 */ + case 0x22: /* DDR5 */ + case 0x23: /* LPDDR5 */ name = "ee1004"; break; default: