From patchwork Thu Dec 1 19:03:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Naresh Solanki X-Patchwork-Id: 13061740 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 94681C4321E for ; Thu, 1 Dec 2022 19:04:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229834AbiLATE0 (ORCPT ); Thu, 1 Dec 2022 14:04:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58264 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229817AbiLATEY (ORCPT ); Thu, 1 Dec 2022 14:04:24 -0500 Received: from mail-wm1-x332.google.com (mail-wm1-x332.google.com [IPv6:2a00:1450:4864:20::332]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9778EBFCEF for ; Thu, 1 Dec 2022 11:04:21 -0800 (PST) Received: by mail-wm1-x332.google.com with SMTP id o30so1913817wms.2 for ; Thu, 01 Dec 2022 11:04:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=9elements.com; s=google; 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=qE6FZaBNq2c3NfrJBONCVhF9AJEc6RhOGgZ53GWa0kQ=; b=EwynONOVI8DWNTiylBys76ZhwXbVnV/jx/Tf27Dpa9AdDOwqA+e9Nl0PtBzyghyZCe bBjsA03zq/sCuWi/VwfVNmY5gzHQAAaXNvpbLIW82RTnz86Vjkcd1zhXYCJniQvZwrCI J1TZ9ST/Io8ZkevskrrPUWvNbyqVQWodnI6kW3Ji51EE10efdHkvz6Vzvx6iNUsaY0Rt uH95oEaGw0uWSXCb0od6sV/EFiTxPSBwyoSBYMiEyErxmWREzt7IzRzvL8beUyiRS1cI SxjfAT5+hRsDUXEmF+YR98aVfVG5h+BeDphtv5xy0L7o82M4j86FNuNIkQC6MtUc/9gm WoDQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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=qE6FZaBNq2c3NfrJBONCVhF9AJEc6RhOGgZ53GWa0kQ=; b=VPpCsyDjNW3ommv5McIiIdc87MKzq94qqJLagHmfXVbqNISrhYeq/hfqTvSKBe7KTi NlVOudPICJX4dEisA3im4QXG2Nzzxix73SIIyQ44onq49r+Ms5ENWN7VTA06qtyePqic m70z2DD3FjARzQLhKQQ/f7PNw5nvJRxVsitmJbt3Kcsl5qfF8GC4d93PiQAyU0Mwq81C tnFAbz4eG0ZEEV8p+I3pDflK5kMOlNHsvUoeLGq2ra5VSF3KCwRtd3p50V02r3AaUC4g 2AtQbmOe60lVP0vEn0IU8OTGHAt7Si5N2HNUsclvEx8ojQ/fcEUrLWF3fN+gineKpIoA ftQQ== X-Gm-Message-State: ANoB5pm9JzW8nyS6wIKqWFpJDXQg/CXlz4ks7CrKJGHmU5mZX/fiOXBz RzUY6VKrJ77XoIcYBYNv0v9suQ== X-Google-Smtp-Source: AA0mqf7K1QfjjNCBXJhkdQL2S1F/rR+TKAo0lsRHIEOUQ2msE399ETIyh+LC8baLYRp+Hk2ys9QWEg== X-Received: by 2002:a1c:6a01:0:b0:3cf:a895:a9cb with SMTP id f1-20020a1c6a01000000b003cfa895a9cbmr52719829wmc.96.1669921460003; Thu, 01 Dec 2022 11:04:20 -0800 (PST) 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 h20-20020a05600c351400b003c6cd82596esm11848474wmq.43.2022.12.01.11.04.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Dec 2022 11:04:19 -0800 (PST) From: Naresh Solanki X-Google-Original-From: Naresh Solanki To: devicetree@vger.kernel.org, Guenter Roeck , Jean Delvare , Liam Girdwood , Mark Brown Cc: linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, Patrick Rudolph , Naresh Solanki Subject: [PATCH v4 2/5] hwmon: (pmbus/core): Add interrupt support Date: Thu, 1 Dec 2022 20:03:51 +0100 Message-Id: <20221201190354.1512790-2-Naresh.Solanki@9elements.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221201190354.1512790-1-Naresh.Solanki@9elements.com> References: <20221201190354.1512790-1-Naresh.Solanki@9elements.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org From: Patrick Rudolph Implement PMBUS irq handler. Signed-off-by: Patrick Rudolph Signed-off-by: Naresh Solanki --- drivers/hwmon/pmbus/pmbus.h | 2 +- drivers/hwmon/pmbus/pmbus_core.c | 89 ++++++++++++++++++++++++++++++++ 2 files changed, 90 insertions(+), 1 deletion(-) diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h index 10fb17879f8e..6b2e6cf93b19 100644 --- a/drivers/hwmon/pmbus/pmbus.h +++ b/drivers/hwmon/pmbus/pmbus.h @@ -26,7 +26,7 @@ enum pmbus_regs { PMBUS_CAPABILITY = 0x19, PMBUS_QUERY = 0x1A, - + PMBUS_SMBALERT_MASK = 0x1B, PMBUS_VOUT_MODE = 0x20, PMBUS_VOUT_COMMAND = 0x21, PMBUS_VOUT_TRIM = 0x22, diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c index 7a23794c0b93..bdcbc216b0cc 100644 --- a/drivers/hwmon/pmbus/pmbus_core.c +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -3078,11 +3078,94 @@ static int pmbus_regulator_register(struct pmbus_data *data) return 0; } + +static int pmbus_write_smbalert_mask(struct i2c_client *client, u8 page, u8 reg, u8 val) +{ + return pmbus_write_word_data(client, page, PMBUS_SMBALERT_MASK, reg | (val << 8)); +} + +static irqreturn_t pmbus_fault_handler(int irq, void *pdata) +{ + struct pmbus_data *data = pdata; + struct i2c_client *client = to_i2c_client(data->dev); + int i, status; + u8 page; + + for (i = 0; i < data->info->num_regulators; i++) { + + if (!data->rdevs[i]) + continue; + + page = rdev_get_id(data->rdevs[i]); + mutex_lock(&data->update_lock); + status = pmbus_read_status_word(client, page); + if (status < 0) { + mutex_unlock(&data->update_lock); + return status; + } + + if (status & ~(PB_STATUS_OFF | PB_STATUS_BUSY | PB_STATUS_POWER_GOOD_N)) + pmbus_clear_fault_page(client, page); + + mutex_unlock(&data->update_lock); + } + + return IRQ_HANDLED; +} + +static int pmbus_irq_setup(struct i2c_client *client, struct pmbus_data *data) +{ + struct device *dev = &client->dev; + const struct pmbus_regulator_status_category *cat; + const struct pmbus_regulator_status_assoc *bit; + int i, j, err, ret, func; + u8 mask; + + for (i = 0; i < data->info->pages; i++) { + func = data->info->func[i]; + + for (j = 0; j < ARRAY_SIZE(pmbus_regulator_flag_map); j++) { + cat = &pmbus_regulator_flag_map[j]; + if (!(func & cat->func)) + continue; + mask = 0; + for (bit = cat->bits; bit->pflag; bit++) + mask |= bit->pflag; + + err = pmbus_write_smbalert_mask(client, i, cat->reg, ~mask); + if (err) + dev_err(dev, "Failed to set smbalert for reg 0x%02x\n", cat->reg); + } + + pmbus_write_smbalert_mask(client, i, PMBUS_STATUS_CML, 0xff); + pmbus_write_smbalert_mask(client, i, PMBUS_STATUS_OTHER, 0xff); + pmbus_write_smbalert_mask(client, i, PMBUS_STATUS_MFR_SPECIFIC, 0xff); + if (data->info->func[i] & PMBUS_HAVE_FAN12) + pmbus_write_smbalert_mask(client, i, PMBUS_STATUS_FAN_12, 0xff); + if (data->info->func[i] & PMBUS_HAVE_FAN34) + pmbus_write_smbalert_mask(client, i, PMBUS_STATUS_FAN_34, 0xff); + } + + /* Register notifiers - can fail if IRQ is not given */ + ret = devm_request_threaded_irq(dev, client->irq, NULL, pmbus_fault_handler, + 0, "pmbus-irq", data); + if (ret) { + dev_warn(dev, "IRQ disabled %d\n", ret); + return ret; + } + + return 0; +} + #else static int pmbus_regulator_register(struct pmbus_data *data) { return 0; } +static int pmbus_irq_setup(struct i2c_client *client, struct pmbus_data *data) +{ + return 0; +} #endif static struct dentry *pmbus_debugfs_dir; /* pmbus debugfs directory */ @@ -3447,6 +3530,12 @@ int pmbus_do_probe(struct i2c_client *client, struct pmbus_driver_info *info) if (ret) return ret; + if (client->irq > 0) { + ret = pmbus_irq_setup(client, data); + if (ret) + return ret; + } + ret = pmbus_init_debugfs(client, data); if (ret) dev_warn(dev, "Failed to register debugfs\n");