From patchwork Fri Jul 14 13:51:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Naresh Solanki X-Patchwork-Id: 702945 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 71B28EB64DC for ; Fri, 14 Jul 2023 13:52:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235606AbjGNNwK (ORCPT ); Fri, 14 Jul 2023 09:52:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47516 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235910AbjGNNvt (ORCPT ); Fri, 14 Jul 2023 09:51:49 -0400 Received: from mail-ed1-x52a.google.com (mail-ed1-x52a.google.com [IPv6:2a00:1450:4864:20::52a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7F7553A88 for ; Fri, 14 Jul 2023 06:51:40 -0700 (PDT) Received: by mail-ed1-x52a.google.com with SMTP id 4fb4d7f45d1cf-52166c7f77cso475041a12.2 for ; Fri, 14 Jul 2023 06:51:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=9elements.com; s=google; t=1689342698; x=1691934698; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=fdgHEMDPNwZTClo7TJkF0JFchHkoo0pFMs1tP6LyZ7c=; b=ESj93/DcEtn8N12L37as3AsAa/dMoBEb28eGurPie63+8CX7MkNPa9tikHUMtv3bZw cj4egn825D41nTObupSy8dkAk0iKnbzS1Pnj4wpXqKkXG1hfSVR0hYLjfx3ZJwmJxiKj t4Xky/3tbecEinUr5OALSDfE5KL188zJUarlmcsg/lMybvZwzfX44N+3Mh6YdtuxsQMg bwK2ympV4UFxbpYNbfV8npkoVO/Yvsl9YWbz5HDUG1p2xmKZPHV7NVn6BJ3t7zjOzyEX xRUUy+Lh/xwy+k7M1p211kQaeMEAi6JRmHhJt2IcyQgm8aXBWx7bxFD/QKCfQYOMHUvm 7TCA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689342698; x=1691934698; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=fdgHEMDPNwZTClo7TJkF0JFchHkoo0pFMs1tP6LyZ7c=; b=lDZYHnhElQOttiarJU4wU0niF4O/4IhlbYStu0vCYTLor9Qy44bkNH+eKr6dUx0W/k t1viYr7Oc0+2ie4JYvBsBmF64gAC1gdJe2KeiWypcX69eI6CZLSSsrOdwcGq1qtCgqsg yQt3Byge1Fny7gfE3TqBjxua0vViBmv0Is4P/oz59JS/IHoDdN/eglZWC6O76Mo0FcsR 8WMqROxD5z0h8psxQRyNp/MYQhSvalm/uRoOn1I2Y1KKMZIYCJQOMUV4oRjSWgH3amUm Ilni2QilFFCq4kikx4M4J8dz7tS6Myqnq4E+0sFT8yaUvxpvxy6NCvCC6+p9Rv1fBe27 YXvg== X-Gm-Message-State: ABy/qLZ92dbvF+tC2PVH2SLwjikTOu3CS7Rjm6xkbVbEdhbkHNy4EH2Y 3JTrJMVCaENYo9wrJ9Bij7PZz78c98V4MPrjLE915Q== X-Google-Smtp-Source: APBJJlHNtkaVoV4y9yoqqAHFVEBrADZm+aYjlN08Z943Y1F/j6BnTWJFbAEAyeDm2B8HoZII2m95kA== X-Received: by 2002:a17:907:9726:b0:989:450:e56a with SMTP id jg38-20020a170907972600b009890450e56amr5452450ejc.76.1689342698583; Fri, 14 Jul 2023 06:51:38 -0700 (PDT) Received: from stroh80.sec.9e.network (ip-078-094-000-051.um19.pools.vodafone-ip.de. [78.94.0.51]) by smtp.gmail.com with ESMTPSA id h21-20020a170906261500b0099236e3f270sm5405991ejc.58.2023.07.14.06.51.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 Jul 2023 06:51:38 -0700 (PDT) From: Naresh Solanki X-Google-Original-From: Naresh Solanki To: devicetree@vger.kernel.org, Guenter Roeck , Jean Delvare Cc: linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, Patrick Rudolph , Naresh Solanki Subject: [PATCH v2 8/8] hwmon: (pmbus/mp2975) Add OCP limit Date: Fri, 14 Jul 2023 15:51:16 +0200 Message-ID: <20230714135124.2645339-8-Naresh.Solanki@9elements.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230714135124.2645339-1-Naresh.Solanki@9elements.com> References: <20230714135124.2645339-1-Naresh.Solanki@9elements.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Patrick Rudolph Add support for PMBUS_IOUT_OC_FAULT_LIMIT. Add a helper function to convert the limit to LINEAR11 format and read data->info.phases[0] on MP2971 and MP2973 as well. Signed-off-by: Patrick Rudolph Signed-off-by: Naresh Solanki --- drivers/hwmon/pmbus/mp2975.c | 76 ++++++++++++++++++++++++++++++------ 1 file changed, 65 insertions(+), 11 deletions(-) diff --git a/drivers/hwmon/pmbus/mp2975.c b/drivers/hwmon/pmbus/mp2975.c index 7684f8667657..0b1983d5998b 100644 --- a/drivers/hwmon/pmbus/mp2975.c +++ b/drivers/hwmon/pmbus/mp2975.c @@ -65,6 +65,10 @@ #define MP2973_VID_STEP_SEL_R2 BIT(3) #define MP2973_IMVP9_EN_R2 BIT(13) +#define MP2973_MFR_OCP_TOTAL_SET 0x5f +#define MP2973_OCP_TOTAL_CUR_MASK GENMASK(6, 0) +#define MP2973_MFR_OCP_LEVEL_RES BIT(15) + #define MP2973_MFR_READ_IOUT_PK 0x90 #define MP2973_MFR_READ_POUT_PK 0x91 @@ -153,6 +157,41 @@ mp2975_vid2direct(int vrf, int val) return 0; } +#define MAX_LIN_MANTISSA (1023 * 1000) +#define MIN_LIN_MANTISSA (511 * 1000) + +/* Converts a milli-unit DIRECT value to LINEAR11 format */ +static u16 mp2975_data2reg_linear11(s64 val) +{ + s16 exponent = 0, mantissa; + bool negative = false; + + /* simple case */ + if (val == 0) + return 0; + + /* Reduce large mantissa until it fits into 10 bit */ + while (val >= MAX_LIN_MANTISSA && exponent < 15) { + exponent++; + val >>= 1; + } + /* Increase small mantissa to improve precision */ + while (val < MIN_LIN_MANTISSA && exponent > -15) { + exponent--; + val <<= 1; + } + + /* Convert mantissa from milli-units to units */ + mantissa = clamp_val(DIV_ROUND_CLOSEST_ULL(val, 1000), 0, 0x3ff); + + /* restore sign */ + if (negative) + mantissa = -mantissa; + + /* Convert to 5 bit exponent, 11 bit mantissa */ + return (mantissa & 0x7ff) | ((exponent << 11) & 0xf800); +} + static int mp2975_read_phase(struct i2c_client *client, struct mp2975_data *data, int page, int phase, u8 reg) @@ -297,6 +336,20 @@ static int mp2973_read_word_data(struct i2c_client *client, int page, ret = pmbus_read_word_data(client, page, phase, MP2973_MFR_READ_IOUT_PK); break; + case PMBUS_IOUT_OC_FAULT_LIMIT: + ret = mp2975_read_word_helper(client, page, phase, + MP2973_MFR_OCP_TOTAL_SET, + GENMASK(15, 0)); + if (ret < 0) + return ret; + + if (ret & MP2973_MFR_OCP_LEVEL_RES) + ret = 2 * (ret & MP2973_OCP_TOTAL_CUR_MASK); + else + ret = ret & MP2973_OCP_TOTAL_CUR_MASK; + + ret = mp2975_data2reg_linear11(ret * info->phases[page] * 1000); + break; case PMBUS_UT_WARN_LIMIT: case PMBUS_UT_FAULT_LIMIT: case PMBUS_VIN_UV_WARN_LIMIT: @@ -307,7 +360,6 @@ static int mp2973_read_word_data(struct i2c_client *client, int page, case PMBUS_IIN_OC_FAULT_LIMIT: case PMBUS_IOUT_OC_LV_FAULT_LIMIT: case PMBUS_IOUT_OC_WARN_LIMIT: - case PMBUS_IOUT_OC_FAULT_LIMIT: case PMBUS_IOUT_UC_FAULT_LIMIT: case PMBUS_POUT_OP_FAULT_LIMIT: case PMBUS_POUT_OP_WARN_LIMIT: @@ -481,11 +533,13 @@ mp2975_identify_multiphase(struct i2c_client *client, struct mp2975_data *data, if (info->phases[0] > data->max_phases[0]) return -EINVAL; - mp2975_set_phase_rail1(info); - num_phases2 = min(data->max_phases[0] - info->phases[0], - data->max_phases[1]); - if (info->phases[1] && info->phases[1] <= num_phases2) - mp2975_set_phase_rail2(info, num_phases2); + if (data->chip_id == mp2975) { + mp2975_set_phase_rail1(info); + num_phases2 = min(data->max_phases[0] - info->phases[0], + data->max_phases[1]); + if (info->phases[1] && info->phases[1] <= num_phases2) + mp2975_set_phase_rail2(info, num_phases2); + } return 0; } @@ -878,12 +932,12 @@ static int mp2975_probe(struct i2c_client *client) data->info.num_regulators = MP2975_PAGE_NUM; } - if (data->chip_id == mp2975) { - /* Identify multiphase configuration. */ - ret = mp2975_identify_multiphase(client, data, info); - if (ret) - return ret; + /* Identify multiphase configuration. */ + ret = mp2975_identify_multiphase(client, data, info); + if (ret) + return ret; + if (data->chip_id == mp2975) { /* Identify VID setting per rail. */ ret = mp2975_identify_rails_vid(client, data, info); if (ret < 0)