From patchwork Wed Jan 20 18:23:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Ciocaltea X-Patchwork-Id: 367485 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 75CADC433E0 for ; Wed, 20 Jan 2021 18:45:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1B4D920715 for ; Wed, 20 Jan 2021 18:45:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388266AbhATSpG (ORCPT ); Wed, 20 Jan 2021 13:45:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47524 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404639AbhATSZz (ORCPT ); Wed, 20 Jan 2021 13:25:55 -0500 Received: from mail-ej1-x635.google.com (mail-ej1-x635.google.com [IPv6:2a00:1450:4864:20::635]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2D9FDC0613D6; Wed, 20 Jan 2021 10:23:48 -0800 (PST) Received: by mail-ej1-x635.google.com with SMTP id l9so29164754ejx.3; Wed, 20 Jan 2021 10:23:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=y8f1cq7Mf2Wy4TPYXP9bhiGTtg8q5gdv/AEqlDgWAJw=; b=u28gsrHPAATzDDGA3j4cpdtpDQ99N3k7MCtkCtXj10Oty3796ad+bgd0Txpi/qWlOm v2scUq5K74saiaGM9d4vmoDaiIZ+QoqmNDjDdSS/ATRPw+KE9n9VTM5vXIQb8Hh5uYTX BblHORimK+F3Ox0JvdasEHLstokPwJ+XwtVxn489YCF6+pWpMpTKvZ3CtZchnqfurHal tiAscwZc4HIQ2v8LQupPctYxyy4kKnhnjel1KWBL8ZGnGIZ3rWRLWY2fn3Ta3tBTNH1F AoexiS4vT+5yxAF+xq4ZKVdb/GNk9FoBARv/hqiKv95dk/9V3Hv7L64mFpPTzxR2dMFr OFdg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=y8f1cq7Mf2Wy4TPYXP9bhiGTtg8q5gdv/AEqlDgWAJw=; b=FEsUlGIQCRqfeunc102zp4BoNe3V3ehpTFSdjrT5ITgIeJ89vuDgltrn+Cvm9krmQO pE0kzFgML6M0bsiCRpFERz6KISpVviePVqIm+CqQyWcu4XXBRnC/7+ijQEart8DaMUyW NuyKdsTbAc+EZAgX8z7GKT4qQjHCg4HzufO3dTgDqJFNdsPAiReZbc80imjbc44nRKLn MeNVKQFl0PhvV2sonA9FnQt95osaMFJDPaOPusUHjxP7dfT1NfxSy7be2Ig/UQw1Oijh XRkmgjXJYR7mJDsbozkyAYbrir/Au5MERU1a+NsLr3ao7EehoC6HmGrkIO6wKrarrT6v FqcQ== X-Gm-Message-State: AOAM532rZz82AHtDxDyxaeIWPVQObmFEf990a4pbb45h6vN/CpnI9u6P 74vaXLoU/fx2PzkJrKvQFr4= X-Google-Smtp-Source: ABdhPJwhhOCHh4q4hd2rsn6xbSFTt3vWwMGjUv3Ez081PLC9tmrljhU8tLuJRF03i9r8i9DsjiBMCQ== X-Received: by 2002:a17:907:10c8:: with SMTP id rv8mr6755952ejb.228.1611167026087; Wed, 20 Jan 2021 10:23:46 -0800 (PST) Received: from localhost.localdomain ([188.24.159.61]) by smtp.gmail.com with ESMTPSA id hr31sm1158332ejc.125.2021.01.20.10.23.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Jan 2021 10:23:45 -0800 (PST) From: Cristian Ciocaltea To: Lee Jones , Mark Brown , Rob Herring , Dmitry Torokhov , Sebastian Reichel Cc: Manivannan Sadhasivam , Liam Girdwood , =?utf-8?q?Andreas_F=C3=A4rber?= , Linus Walleij , linux-actions@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH v6 5/7] power: reset: Add poweroff driver for ATC260x PMICs Date: Wed, 20 Jan 2021 20:23:30 +0200 Message-Id: X-Mailer: git-send-email 2.30.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org This driver provides poweroff and reboot support for a system through the ATC2603C and ATC2609A chip variants of the Actions Semi ATC260x family of PMICs. Signed-off-by: Cristian Ciocaltea --- Changes in v6: - None Changes in v5: - Drop unneeded '#include ' Changes in v4: - None Changes in v3: - Removed the unnecessary driver compatibles drivers/power/reset/Kconfig | 8 +- drivers/power/reset/Makefile | 1 + drivers/power/reset/atc260x-poweroff.c | 262 +++++++++++++++++++++++++ 3 files changed, 270 insertions(+), 1 deletion(-) create mode 100644 drivers/power/reset/atc260x-poweroff.c diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index b22c4fdb2561..1737e227b16e 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -39,6 +39,13 @@ config POWER_RESET_AT91_SAMA5D2_SHDWC This driver supports the alternate shutdown controller for some Atmel SAMA5 SoCs. It is present for example on SAMA5D2 SoC. +config POWER_RESET_ATC260X + tristate "Actions Semi ATC260x PMIC power-off driver" + depends on MFD_ATC260X + help + This driver provides power-off and restart support for a system + through Actions Semi ATC260x series PMICs. + config POWER_RESET_AXXIA bool "LSI Axxia reset driver" depends on ARCH_AXXIA @@ -292,4 +299,3 @@ config NVMEM_REBOOT_MODE action according to the mode. endif - diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index 9dc49d3a57ff..b4601c0a96ed 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -3,6 +3,7 @@ obj-$(CONFIG_POWER_RESET_AS3722) += as3722-poweroff.o obj-$(CONFIG_POWER_RESET_AT91_POWEROFF) += at91-poweroff.o obj-$(CONFIG_POWER_RESET_AT91_RESET) += at91-reset.o obj-$(CONFIG_POWER_RESET_AT91_SAMA5D2_SHDWC) += at91-sama5d2_shdwc.o +obj-$(CONFIG_POWER_RESET_ATC260X) += atc260x-poweroff.o obj-$(CONFIG_POWER_RESET_AXXIA) += axxia-reset.o obj-$(CONFIG_POWER_RESET_BRCMKONA) += brcm-kona-reset.o obj-$(CONFIG_POWER_RESET_BRCMSTB) += brcmstb-reboot.o diff --git a/drivers/power/reset/atc260x-poweroff.c b/drivers/power/reset/atc260x-poweroff.c new file mode 100644 index 000000000000..98f20251a6d1 --- /dev/null +++ b/drivers/power/reset/atc260x-poweroff.c @@ -0,0 +1,262 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Poweroff & reset driver for Actions Semi ATC260x PMICs + * + * Copyright (c) 2020 Cristian Ciocaltea + */ + +#include +#include +#include +#include +#include +#include +#include + +struct atc260x_pwrc { + struct device *dev; + struct regmap *regmap; + struct notifier_block restart_nb; + int (*do_poweroff)(const struct atc260x_pwrc *pwrc, bool restart); +}; + +/* Global variable needed only for pm_power_off */ +static struct atc260x_pwrc *atc260x_pwrc_data; + +static int atc2603c_do_poweroff(const struct atc260x_pwrc *pwrc, bool restart) +{ + int ret, deep_sleep = 0; + uint reg_mask, reg_val; + + /* S4-Deep Sleep Mode is NOT available for WALL/USB power */ + if (!restart && !power_supply_is_system_supplied()) { + deep_sleep = 1; + dev_info(pwrc->dev, "Enabling S4-Deep Sleep Mode"); + } + + /* Update wakeup sources */ + reg_val = ATC2603C_PMU_SYS_CTL0_ONOFF_LONG_WK_EN | + (restart ? ATC2603C_PMU_SYS_CTL0_RESET_WK_EN + : ATC2603C_PMU_SYS_CTL0_ONOFF_SHORT_WK_EN); + + ret = regmap_update_bits(pwrc->regmap, ATC2603C_PMU_SYS_CTL0, + ATC2603C_PMU_SYS_CTL0_WK_ALL, reg_val); + if (ret) + dev_warn(pwrc->dev, "failed to write SYS_CTL0: %d\n", ret); + + /* Update power mode */ + reg_mask = ATC2603C_PMU_SYS_CTL3_EN_S2 | ATC2603C_PMU_SYS_CTL3_EN_S3; + + ret = regmap_update_bits(pwrc->regmap, ATC2603C_PMU_SYS_CTL3, reg_mask, + deep_sleep ? 0 : ATC2603C_PMU_SYS_CTL3_EN_S3); + if (ret) { + dev_err(pwrc->dev, "failed to write SYS_CTL3: %d\n", ret); + return ret; + } + + /* Trigger poweroff / restart sequence */ + reg_mask = restart ? ATC2603C_PMU_SYS_CTL0_RESTART_EN + : ATC2603C_PMU_SYS_CTL1_EN_S1; + reg_val = restart ? ATC2603C_PMU_SYS_CTL0_RESTART_EN : 0; + + ret = regmap_update_bits(pwrc->regmap, + restart ? ATC2603C_PMU_SYS_CTL0 : ATC2603C_PMU_SYS_CTL1, + reg_mask, reg_val); + if (ret) { + dev_err(pwrc->dev, "failed to write SYS_CTL%d: %d\n", + restart ? 0 : 1, ret); + return ret; + } + + /* Wait for trigger completion */ + mdelay(200); + + return 0; +} + +static int atc2609a_do_poweroff(const struct atc260x_pwrc *pwrc, bool restart) +{ + int ret, deep_sleep = 0; + uint reg_mask, reg_val; + + /* S4-Deep Sleep Mode is NOT available for WALL/USB power */ + if (!restart && !power_supply_is_system_supplied()) { + deep_sleep = 1; + dev_info(pwrc->dev, "Enabling S4-Deep Sleep Mode"); + } + + /* Update wakeup sources */ + reg_val = ATC2609A_PMU_SYS_CTL0_ONOFF_LONG_WK_EN | + (restart ? ATC2609A_PMU_SYS_CTL0_RESET_WK_EN + : ATC2609A_PMU_SYS_CTL0_ONOFF_SHORT_WK_EN); + + ret = regmap_update_bits(pwrc->regmap, ATC2609A_PMU_SYS_CTL0, + ATC2609A_PMU_SYS_CTL0_WK_ALL, reg_val); + if (ret) + dev_warn(pwrc->dev, "failed to write SYS_CTL0: %d\n", ret); + + /* Update power mode */ + reg_mask = ATC2609A_PMU_SYS_CTL3_EN_S2 | ATC2609A_PMU_SYS_CTL3_EN_S3; + + ret = regmap_update_bits(pwrc->regmap, ATC2609A_PMU_SYS_CTL3, reg_mask, + deep_sleep ? 0 : ATC2609A_PMU_SYS_CTL3_EN_S3); + if (ret) { + dev_err(pwrc->dev, "failed to write SYS_CTL3: %d\n", ret); + return ret; + } + + /* Trigger poweroff / restart sequence */ + reg_mask = restart ? ATC2609A_PMU_SYS_CTL0_RESTART_EN + : ATC2609A_PMU_SYS_CTL1_EN_S1; + reg_val = restart ? ATC2609A_PMU_SYS_CTL0_RESTART_EN : 0; + + ret = regmap_update_bits(pwrc->regmap, + restart ? ATC2609A_PMU_SYS_CTL0 : ATC2609A_PMU_SYS_CTL1, + reg_mask, reg_val); + if (ret) { + dev_err(pwrc->dev, "failed to write SYS_CTL%d: %d\n", + restart ? 0 : 1, ret); + return ret; + } + + /* Wait for trigger completion */ + mdelay(200); + + return 0; +} + +static int atc2603c_init(const struct atc260x_pwrc *pwrc) +{ + int ret; + + /* + * Delay transition from S2/S3 to S1 in order to avoid + * DDR init failure in Bootloader. + */ + ret = regmap_update_bits(pwrc->regmap, ATC2603C_PMU_SYS_CTL3, + ATC2603C_PMU_SYS_CTL3_S2S3TOS1_TIMER_EN, + ATC2603C_PMU_SYS_CTL3_S2S3TOS1_TIMER_EN); + if (ret) + dev_warn(pwrc->dev, "failed to write SYS_CTL3: %d\n", ret); + + /* Set wakeup sources */ + ret = regmap_update_bits(pwrc->regmap, ATC2603C_PMU_SYS_CTL0, + ATC2603C_PMU_SYS_CTL0_WK_ALL, + ATC2603C_PMU_SYS_CTL0_HDSW_WK_EN | + ATC2603C_PMU_SYS_CTL0_ONOFF_LONG_WK_EN); + if (ret) + dev_warn(pwrc->dev, "failed to write SYS_CTL0: %d\n", ret); + + return ret; +} + +static int atc2609a_init(const struct atc260x_pwrc *pwrc) +{ + int ret; + + /* Set wakeup sources */ + ret = regmap_update_bits(pwrc->regmap, ATC2609A_PMU_SYS_CTL0, + ATC2609A_PMU_SYS_CTL0_WK_ALL, + ATC2609A_PMU_SYS_CTL0_HDSW_WK_EN | + ATC2609A_PMU_SYS_CTL0_ONOFF_LONG_WK_EN); + if (ret) + dev_warn(pwrc->dev, "failed to write SYS_CTL0: %d\n", ret); + + return ret; +} + +static void atc260x_pwrc_pm_handler(void) +{ + atc260x_pwrc_data->do_poweroff(atc260x_pwrc_data, false); + + WARN_ONCE(1, "Unable to power off system\n"); +} + +static int atc260x_pwrc_restart_handler(struct notifier_block *nb, + unsigned long mode, void *cmd) +{ + struct atc260x_pwrc *pwrc = container_of(nb, struct atc260x_pwrc, + restart_nb); + pwrc->do_poweroff(pwrc, true); + + return NOTIFY_DONE; +} + +static int atc260x_pwrc_probe(struct platform_device *pdev) +{ + struct atc260x *atc260x = dev_get_drvdata(pdev->dev.parent); + struct atc260x_pwrc *priv; + int ret; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = &pdev->dev; + priv->regmap = atc260x->regmap; + priv->restart_nb.notifier_call = atc260x_pwrc_restart_handler; + priv->restart_nb.priority = 192; + + switch (atc260x->ic_type) { + case ATC2603C: + priv->do_poweroff = atc2603c_do_poweroff; + ret = atc2603c_init(priv); + break; + case ATC2609A: + priv->do_poweroff = atc2609a_do_poweroff; + ret = atc2609a_init(priv); + break; + default: + dev_err(priv->dev, + "Poweroff not supported for ATC260x PMIC type: %u\n", + atc260x->ic_type); + return -EINVAL; + } + + if (ret) + return ret; + + platform_set_drvdata(pdev, priv); + + if (!pm_power_off) { + atc260x_pwrc_data = priv; + pm_power_off = atc260x_pwrc_pm_handler; + } else { + dev_warn(priv->dev, "Poweroff callback already assigned\n"); + } + + ret = register_restart_handler(&priv->restart_nb); + if (ret) + dev_err(priv->dev, "failed to register restart handler: %d\n", + ret); + + return ret; +} + +static int atc260x_pwrc_remove(struct platform_device *pdev) +{ + struct atc260x_pwrc *priv = platform_get_drvdata(pdev); + + if (atc260x_pwrc_data == priv) { + pm_power_off = NULL; + atc260x_pwrc_data = NULL; + } + + unregister_restart_handler(&priv->restart_nb); + + return 0; +} + +static struct platform_driver atc260x_pwrc_driver = { + .probe = atc260x_pwrc_probe, + .remove = atc260x_pwrc_remove, + .driver = { + .name = "atc260x-pwrc", + }, +}; + +module_platform_driver(atc260x_pwrc_driver); + +MODULE_DESCRIPTION("Poweroff & reset driver for ATC260x PMICs"); +MODULE_AUTHOR("Cristian Ciocaltea "); +MODULE_LICENSE("GPL");