From patchwork Wed Jul 3 16:48:20 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frank Wunderlich X-Patchwork-Id: 11029929 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 6823513B1 for ; Wed, 3 Jul 2019 16:50:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 531A228678 for ; Wed, 3 Jul 2019 16:50:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 405DE1FE84; Wed, 3 Jul 2019 16:50:02 +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 A42CC1FE84 for ; Wed, 3 Jul 2019 16:50:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727113AbfGCQt5 (ORCPT ); Wed, 3 Jul 2019 12:49:57 -0400 Received: from mout.gmx.net ([212.227.15.15]:34623 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727121AbfGCQtr (ORCPT ); Wed, 3 Jul 2019 12:49:47 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1562172517; bh=FYPoJLHu+kLCtWhSyoQqK0wSUyhdckRPerDAqwIXB5c=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date:In-Reply-To:References; b=G0q81dSU2nsJt4KWWwdvJ6iuq4nItbX9Ao6DXDU4JL8k+46BUF3R64i4Zt9wsLoaG yIpw0I19Q+aqWIkWRAY/NXRoOcGNge72o11jAvKApMT5minRHDoU0nfpEvMVvFm9ZM DkkzexOvoZZwaQn74hfFkqAuX/MDtpAGTvJywUYU= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from localhost.localdomain ([217.61.158.204]) by mail.gmx.com (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MbAcs-1iFZHQ3reS-00bYLZ; Wed, 03 Jul 2019 18:48:37 +0200 From: Frank Wunderlich To: Lee Jones , Rob Herring , Mark Rutland , Matthias Brugger , Sean Wang , Sebastian Reichel , Alessandro Zummo , Alexandre Belloni , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-rtc@vger.kernel.org, Eddie Huang , Thomas Gleixner , Richard Fontana , Allison Randal , "David S . Miller" , Mauro Carvalho Chehab , Greg Kroah-Hartman , Rob Herring , Linus Walleij , Nicolas Ferre , "Paul E . McKenney" Cc: Josef Friedl , Frank Wunderlich Subject: [PATCH v2 5/7] power: reset: add driver for mt6323 poweroff Date: Wed, 3 Jul 2019 18:48:20 +0200 Message-Id: <20190703164822.17924-6-frank-w@public-files.de> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190703164822.17924-1-frank-w@public-files.de> References: <20190703164822.17924-1-frank-w@public-files.de> X-Provags-ID: V03:K1:gdDgvKlW8Sm9gNmKtGMkuW55LkelpJPP0Pu8TtsWrmVdWT+06b9 ODLkHjuVpbcK6QkjMouhOSatVh9X9w6QshI7F5VYBtF47336ITJHAgFaIeucSUHktwZZKKk 7sRvhuVIUY224YacBdCOrHXPx2Zt+qJquchaohcZWqqBHXucVKlFFk8pX/ks2GwwZYHg7Gx zFLzyBEAcqT/cjCjVnnRQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:hc+szzbz1YQ=:5qEd8DXbexZP8hpZ2owlA0 e804rvNLdJZQNN5LOZxCaTFYroAXeDlijhgszblJlxaZxOSWMnvvUOkAkWOyg8h0ylmC0rrqw nLikIkNTGOyizTavLtnkjPKdl9HBe+8zz7YDe98s0oqJzluUmBOYahj4ck6rczWbrzxR9dm/G T88JbvkYZzubE4cyHnEx1I3OmAg+8a08MMJTyYiOlTLY5Zi0jaMfrkngdFj2m14VUJnSl3LF3 W33aZCAWfJPflaP+MJeZgBjXMohvRAYViM4iO4ObdKwz9+JmCDERIkdCRO8SS+4W/Mg5Sr6QI 4LM7ug6v4Hb/QKHg1mipCLSu2XsjaKNx91jVR7OL0+xtrfJI6JfaUEynHQPCdNGeRhg7kkp1w JB4dRTPd9eJELcX25Of2/vootDeXmxlJbZFeE7zSHZ3U70GZxZIPt9CbRMCim/P52C5bzSX0x zZ/W1SJxPUVRlK+47vQwv5hAU3BZLpO4FLpoBTcXuZ35BC49/FNN4r+GMEdNfP9ZFGKPhhrPS CitKx9IiBWBL4m2UMt1wQTx4zwLg8sKoTpgR7LPFyKZaiRNxJTR9jMM+wqpbf8siaulITxNfJ Wrxiw/8kQOhmMrG6RsNS2J7LO3GL2eonqB8yLkww75yIF4FychaUWMR7gvlp/l6Ivtv2uWOhF PDHFwrsNWFyJiAc5Lo7I9ey8sEJM6MFXFuj1cfq8o+NQoI3ngzB5KDtB4hHCXaHVXdqJYAY1I VQCK27aUau373AgKJ8rIVE5wn39nG8llq0b47Nk0RpgNyZy94Opp5ZmtjgWFd296Wa3j1IIaz Eg2lAXr1TPuQMeHKxjd2VfaE66sCiz0AkYdXIQuBXdm0Aux/C+BHlNvI5S5KE3aioZY/Hc4aH nXR0YBHMfFbKzqRrSMaPxJFwvi5vBUEKgDQoWNpukZJbftx9hp2QIQXBV0BX6p/u5WbAdRuLY XsIjjSPXGfcHLtJ+wBskFws2q6nwE31keunV1/iClZL2HaZxJnz38Qz9jWyCR/uJbxDuyfgRy maUUzL71yMrvwIqbqeTwKrU2q1MB8aSqbz8Hk+CZaY4iVrF9tYFsgn6Yd6enlaQpHQr5NYiwm mdKsQqhVLCLcB4= 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 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 980951dff834..492678e22088 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 0aebee954ac1..94eaceb01d66 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,