From patchwork Mon Jul 29 17:41:52 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frank Wunderlich X-Patchwork-Id: 11064263 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A24911398 for ; Mon, 29 Jul 2019 17:43:23 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 91FCC262FF for ; Mon, 29 Jul 2019 17:43:23 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 85B252862A; Mon, 29 Jul 2019 17:43:23 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C45E2262FF for ; Mon, 29 Jul 2019 17:43:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387918AbfG2RnL (ORCPT ); Mon, 29 Jul 2019 13:43:11 -0400 Received: from mout.gmx.net ([212.227.15.19]:60265 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387815AbfG2RnK (ORCPT ); Mon, 29 Jul 2019 13:43:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1564422145; bh=IQzg9EyoySG6H4o6CVx/5eexJboEaGPQ5QZI0KyNPCQ=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date:In-Reply-To:References; b=RrZ4CrtFTBQNYvUzgR9Dtse7jW63iZXYTqLORArKe1484BP3GSV4O2iN9v3Enue1n 6GOriIU1G/LQAKF8+cVvoKytfPyVeCohVjeO3phWQ5mEx9EwQpDJ/PuOLMOXp8ctQL 1s5v4azkAHVMPEELDdluc2O0zfsrjqTetM7kUaUY= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from localhost.localdomain ([185.76.97.79]) by mail.gmx.com (mrgmx001 [212.227.17.190]) with ESMTPSA (Nemesis) id 0MVvi4-1huNgW3HHk-00X0Vb; Mon, 29 Jul 2019 19:42:24 +0200 From: Frank Wunderlich To: Alessandro Zummo , Alexandre Belloni , Allison Randal , "David S. Miller" , devicetree@vger.kernel.org, Eddie Huang , Greg Kroah-Hartman , Jonathan Cameron , Kate Stewart , Lee Jones , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-pm@vger.kernel.org, linux-rtc@vger.kernel.org, Mark Rutland , Matthias Brugger , Mauro Carvalho Chehab , Nicolas Ferre , Richard Fontana , Rob Herring , Sean Wang , Sebastian Reichel , Thomas Gleixner , "Tianping . Fang" Cc: Josef Friedl , Frank Wunderlich Subject: [PATCH v3 08/10] power: reset: add driver for mt6323 poweroff Date: Mon, 29 Jul 2019 19:41:52 +0200 Message-Id: <20190729174154.4335-9-frank-w@public-files.de> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190729174154.4335-1-frank-w@public-files.de> References: <20190729174154.4335-1-frank-w@public-files.de> X-Provags-ID: V03:K1:lAFcOh6hKQK/d/CpvNwJob/kBICOSBOuC3jHGVTAdVuixRcIcXT gbf7IdjrcZ0nIVwA1WOU7BcAdnQJZHmWwzUrQHkqXWy49zCuFBOS/zNN37O1OHqW4ZQZ/H4 QCy5LEL7ztAHe7QA6+4PqGgeHz4Q8W5vMW7HJCk7fi3E2W8+XVOH6uO05brTc6APFvA+4PN 8YZkIS5mBxvUt/Mm5XHFQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:m7XpZVnB5uQ=:kPjlBRlqekAluyc50aSZer JpbjYWy6IB5v6ZTaxxu8LmdtHAQNE4cw+O8FiuJe8Kv+E+0vqnxf4/8CKJgpWt55t65iXNcxR 7cEOXAnjYbbjVnqtMXbUaA7ZytGshaJ9sqCbi4igKxkp5mVqDAq3BGzJoUDbOM5wdDTj3oN/i zVRfP8yeLOGFTXy/Ne3WqYk3POMJj5+2VkAa+uitLZSi3S0L1/J4+rnBPNtPWC3MtuSj1H9dN U4WL7V8Ccf0zmKjtv1eUC5rnq2hUNKWdYaUxObRY3MkCxQTP/vLer5K0M9QKhMuuoBWMBBKX1 cNJ2EMhOz3Yj+ruT38gaJi3t/zYxHXNvdYgmsKlR7zvLB3l7bodH1vGISAs7ATseIflEuatnK bj0lVeqP7QA607OVCxcVLjFUgh+sx03m2iSlNAlh9OcIvTBohGGg13VzKVjlSd60NB/CP8XgW Lb2wPyac3Px3HsgScbYOk3vOpe3T/wLP106lv9+Sk9ROAUBYiLhaipgsfDsIb+ixLYlCol0sP tkoP2Ryk/zl895ryIYXS4LF0Xe4L9PZoQJQA37/ujyoqwe8V7XzZJcUhPu2/fdIpD1XkJCCE8 iGXdh3YueMxu73mN6npkDARsGeIYgOcEvsrKk5FdjaQMNKvGdstBYKZYEIjRzK26XdUUeL/iT GSOJ0OB5EZgPCTDw0xAiSLN+NBOlmY23z8BMNfe2rQRnIwYJTMeqpGJD8IkqfFI43TrdZmq5w ULHUpmNYWu/s/ehnvenYBW7oLBAVLjD7MvstNGOXIgTlZwtzjWR3+DzWlseFMPwCahwKdwKZA ImgmxS9b/67QIfl2SwAnds4y37cFVtFcR1pxr6P5ksIsrq0EDsq0YLuGZKPBS5OqlAFFFPo0G Tj5F3X9ncLu7to7GlrIMyaFY3mfKjPluMkqE1x5y+JwvM/shKJhmInQu8IzU7NlO4sC3Peo2o jZTrxeGGud2h3Z28uUfFAWgQD8S/puhabXW9y2ffJq4N76j4lezZvIxTAO2fLC1N5vB8mntj9 E2Zo/CS7lotcUS4ZTJZWiMGB82NsvbGm3XFPwBuNZOl+QI/1oyQBDhRLlmrhB+FjwJ9qFGkYx mOveQc7kz5uCn8= Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Josef Friedl add poweroff driver for mt6323 and make Makefile and Kconfig-Entries changes since v2: none (=v2 part 5) Suggested-by: Frank Wunderlich Signed-off-by: Josef Friedl Signed-off-by: Frank Wunderlich --- drivers/power/reset/Kconfig | 10 +++ drivers/power/reset/Makefile | 1 + drivers/power/reset/mt6323-poweroff.c | 97 +++++++++++++++++++++++++++ include/linux/mfd/mt6397/core.h | 2 + 4 files changed, 110 insertions(+) create mode 100644 drivers/power/reset/mt6323-poweroff.c -- 2.17.1 diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index a564237278ff..c721939767eb 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -140,6 +140,16 @@ config POWER_RESET_LTC2952 This driver supports an external powerdown trigger and board power down via the LTC2952. Bindings are made in the device tree. +config POWER_RESET_MT6323 + bool "MediaTek MT6323 power-off driver" + depends on MFD_MT6397 + help + The power-off driver is responsible for externally shutdown down + the power of a remote MediaTek SoC MT6323 is connected to through + controlling a tiny circuit BBPU inside MT6323 RTC. + + Say Y if you have a board where MT6323 could be found. + config POWER_RESET_QNAP bool "QNAP power-off driver" depends on OF_GPIO && PLAT_ORION diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index 85da3198e4e0..da37f8b851dc 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o obj-$(CONFIG_POWER_RESET_GPIO_RESTART) += gpio-restart.o obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o +obj-$(CONFIG_POWER_RESET_MT6323) += mt6323-poweroff.o obj-$(CONFIG_POWER_RESET_QCOM_PON) += qcom-pon.o obj-$(CONFIG_POWER_RESET_OCELOT_RESET) += ocelot-reset.o obj-$(CONFIG_POWER_RESET_PIIX4_POWEROFF) += piix4-poweroff.o diff --git a/drivers/power/reset/mt6323-poweroff.c b/drivers/power/reset/mt6323-poweroff.c new file mode 100644 index 000000000000..1caf43d9e46d --- /dev/null +++ b/drivers/power/reset/mt6323-poweroff.c @@ -0,0 +1,97 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Power off through MediaTek PMIC + * + * Copyright (C) 2018 MediaTek Inc. + * + * Author: Sean Wang + * + */ + +#include +#include +#include +#include +#include +#include + +struct mt6323_pwrc { + struct device *dev; + struct regmap *regmap; + u32 base; +}; + +static struct mt6323_pwrc *mt_pwrc; + +static void mt6323_do_pwroff(void) +{ + struct mt6323_pwrc *pwrc = mt_pwrc; + unsigned int val; + int ret; + + regmap_write(pwrc->regmap, pwrc->base + RTC_BBPU, RTC_BBPU_KEY); + regmap_write(pwrc->regmap, pwrc->base + RTC_WRTGR, 1); + + ret = regmap_read_poll_timeout(pwrc->regmap, + pwrc->base + RTC_BBPU, val, + !(val & RTC_BBPU_CBUSY), + MTK_RTC_POLL_DELAY_US, + MTK_RTC_POLL_TIMEOUT); + if (ret) + dev_err(pwrc->dev, "failed to write BBPU: %d\n", ret); + + /* Wait some time until system down, otherwise, notice with a warn */ + mdelay(1000); + + WARN_ONCE(1, "Unable to power off system\n"); +} + +static int mt6323_pwrc_probe(struct platform_device *pdev) +{ + struct mt6397_chip *mt6397_chip = dev_get_drvdata(pdev->dev.parent); + struct mt6323_pwrc *pwrc; + struct resource *res; + + pwrc = devm_kzalloc(&pdev->dev, sizeof(*pwrc), GFP_KERNEL); + if (!pwrc) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + pwrc->base = res->start; + pwrc->regmap = mt6397_chip->regmap; + pwrc->dev = &pdev->dev; + mt_pwrc = pwrc; + + pm_power_off = &mt6323_do_pwroff; + + return 0; +} + +static int mt6323_pwrc_remove(struct platform_device *pdev) +{ + if (pm_power_off == &mt6323_do_pwroff) + pm_power_off = NULL; + + return 0; +} + +static const struct of_device_id mt6323_pwrc_dt_match[] = { + { .compatible = "mediatek,mt6323-pwrc" }, + {}, +}; +MODULE_DEVICE_TABLE(of, mt6323_pwrc_dt_match); + +static struct platform_driver mt6323_pwrc_driver = { + .probe = mt6323_pwrc_probe, + .remove = mt6323_pwrc_remove, + .driver = { + .name = "mt6323-pwrc", + .of_match_table = mt6323_pwrc_dt_match, + }, +}; + +module_platform_driver(mt6323_pwrc_driver); + +MODULE_DESCRIPTION("Poweroff driver for MT6323 PMIC"); +MODULE_AUTHOR("Sean Wang "); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/mfd/mt6397/core.h b/include/linux/mfd/mt6397/core.h index 25a95e72179b..652da61e3711 100644 --- a/include/linux/mfd/mt6397/core.h +++ b/include/linux/mfd/mt6397/core.h @@ -7,6 +7,8 @@ #ifndef __MFD_MT6397_CORE_H__ #define __MFD_MT6397_CORE_H__ +#include + enum mt6397_irq_numbers { MT6397_IRQ_SPKL_AB = 0, MT6397_IRQ_SPKR_AB,