From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6F0BDC4708C for ; Mon, 24 May 2021 15:10:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4AE30610FC for ; Mon, 24 May 2021 15:10:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233822AbhEXPMB (ORCPT ); Mon, 24 May 2021 11:12:01 -0400 Received: from smtp.outgoing.loopia.se ([93.188.3.37]:35923 "EHLO smtp.outgoing.loopia.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233274AbhEXPGU (ORCPT ); Mon, 24 May 2021 11:06:20 -0400 Received: from s807.loopia.se (localhost [127.0.0.1]) by s807.loopia.se (Postfix) with ESMTP id ECB782E6BD4A for ; Mon, 24 May 2021 17:02:54 +0200 (CEST) Received: from s645.loopia.se (unknown [172.22.191.6]) by s807.loopia.se (Postfix) with ESMTP id DCD7F2E2B914; Mon, 24 May 2021 17:02:54 +0200 (CEST) Received: from s898.loopia.se (unknown [172.22.191.5]) by s645.loopia.se (Postfix) with ESMTP id CAB271579FDE; Mon, 24 May 2021 17:02:54 +0200 (CEST) X-Virus-Scanned: amavisd-new at amavis.loopia.se Received: from s934.loopia.se ([172.22.191.5]) by s898.loopia.se (s898.loopia.se [172.22.190.17]) (amavisd-new, port 10024) with UTF8LMTP id lKH8frMJ6QJ7; Mon, 24 May 2021 17:02:54 +0200 (CEST) X-Loopia-Auth: user X-Loopia-User: carl@hgsystem.se X-Loopia-Originating-IP: 155.4.133.180 Received: from localhost.localdomain (h-155-4-133-180.NA.cust.bahnhof.se [155.4.133.180]) (Authenticated sender: carl@hgsystem.se) by s934.loopia.se (Postfix) with ESMTPSA id 25E0C7CE983; Mon, 24 May 2021 17:02:54 +0200 (CEST) From: Erik Rosen To: Jean Delvare , Guenter Roeck , Jonathan Corbet , linux-hwmon@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Erik Rosen Subject: [PATCH v3 2/6] hwmon: (pmbus/pim4328) Add function for reading direct mode coefficients Date: Mon, 24 May 2021 17:02:42 +0200 Message-Id: <20210524150246.90546-3-erik.rosen@metormote.com> X-Mailer: git-send-email 2.11.0 (Apple Git-81) In-Reply-To: <20210524150246.90546-1-erik.rosen@metormote.com> References: <20210524150246.90546-1-erik.rosen@metormote.com> Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Add the function pmbus_read_coefficients to pmbus_core to be able to read and decode the coefficients for the direct format for a certain command. Signed-off-by: Erik Rosen --- drivers/hwmon/pmbus/pmbus.h | 4 ++++ drivers/hwmon/pmbus/pmbus_core.c | 38 ++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+) diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h index 3968924f8533..d9ed9736b480 100644 --- a/drivers/hwmon/pmbus/pmbus.h +++ b/drivers/hwmon/pmbus/pmbus.h @@ -499,6 +499,10 @@ int pmbus_get_fan_rate_cached(struct i2c_client *client, int page, int id, enum pmbus_fan_mode mode); int pmbus_update_fan(struct i2c_client *client, int page, int id, u8 config, u8 mask, u16 command); +int pmbus_read_coefficients(struct i2c_client *client, + struct pmbus_driver_info *info, + enum pmbus_sensor_classes sensor_class, + u8 command); struct dentry *pmbus_get_debugfs_dir(struct i2c_client *client); #endif /* PMBUS_H */ diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c index cb885efc4fba..460cbfd716e4 100644 --- a/drivers/hwmon/pmbus/pmbus_core.c +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -301,6 +301,44 @@ int pmbus_update_fan(struct i2c_client *client, int page, int id, } EXPORT_SYMBOL_NS_GPL(pmbus_update_fan, PMBUS); +/* + * Read the coefficients for direct mode. + */ +int pmbus_read_coefficients(struct i2c_client *client, + struct pmbus_driver_info *info, + enum pmbus_sensor_classes sensor_class, + u8 command) +{ + int rv; + union i2c_smbus_data data; + s8 R; + s16 m, b; + + data.block[0] = 2; + data.block[1] = command; + data.block[2] = 0x01; + + rv = i2c_smbus_xfer(client->adapter, client->addr, client->flags, + I2C_SMBUS_WRITE, PMBUS_COEFFICIENTS, + I2C_SMBUS_BLOCK_PROC_CALL, &data); + + if (rv < 0) + return rv; + + if (data.block[0] != 5) + return -EIO; + + m = data.block[1] | (data.block[2] << 8); + b = data.block[3] | (data.block[4] << 8); + R = data.block[5]; + info->m[sensor_class] = m; + info->b[sensor_class] = b; + info->R[sensor_class] = R; + + return rv; +} +EXPORT_SYMBOL_NS_GPL(pmbus_read_coefficients, PMBUS); + int pmbus_read_word_data(struct i2c_client *client, int page, int phase, u8 reg) { int rv; -- 2.20.1