From patchwork Fri Feb 3 14:01:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: jerome Neanne X-Patchwork-Id: 650799 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 012FEC6379F for ; Fri, 3 Feb 2023 14:05:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233061AbjBCOFX (ORCPT ); Fri, 3 Feb 2023 09:05:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47328 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233181AbjBCOEN (ORCPT ); Fri, 3 Feb 2023 09:04:13 -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 355BCA56EC for ; Fri, 3 Feb 2023 06:02:05 -0800 (PST) Received: by mail-wm1-x332.google.com with SMTP id k16so3945559wms.2 for ; Fri, 03 Feb 2023 06:02:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=oEkaRI2/7OwdP6CFOGx3AkcXyupYh3TuV6fnAqTrbn8=; b=sHxjOK4xLPki6HlXUcVjIamFw7gcPjMf3aifkU7FVnaJU/10MVvRXXqhp7M2fLNP2b S6aX3jACu7Va+p8Nf9e+A5FzZ2AoUuTzFAr/1A57g7A6Ilu2d6yLziBbSNs6NqtKO+cS 5dNk0DjzNtDEWG56WWuuRALima53OCtPLY9N5eNVFRxka43H9LJ9DTJuBjJFn2o7NjpR 0EELvc7//3E6Ax0xn85aKg1VIGKqUinYZN71HQX2SoJ6ckQ33No8i7E8S9t3x/BSG7R+ dL7hKNdgme6iGklgw897tOI7R0laQWDZxjegSq9ktY+Cm0JbBaaoQztefgK4bvD+EX5t YiHw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=oEkaRI2/7OwdP6CFOGx3AkcXyupYh3TuV6fnAqTrbn8=; b=cimZAlMF4fvDV11kfDTLjIQKh2xjHkgy8dBPCKj/67h/4NLKbYJyp8uRxhoOgpC8z4 4yrRYssXybN9wP9AUQLj25pbtxhHiwcSyJo8LPjr0gE4+r/igt+xZuSo/sVgt/KeAssY MOnmIM5L9VOxCvbOxuRheaG7W2LQNfOVNS4SXjnYvjNsmP6VY9GFLeMMzun0RMB1u1Fn O5G8u47dAUXHf6M/83PeRkocbqfcTn+N3Zhr5oLKO2+bB2HMdwLtdspquWOfCDBw3bJa +kMHf3v0YQKPFQbFBMwV+Tt1+tsjRVjR29M0E+pkC2HkL6Myi5dgCWmHfbUdk6ZN/Js9 qrZg== X-Gm-Message-State: AO0yUKVhQtb/KswEDhT4q+h3uFTloRz0Ubk2E4mtK6Tx5cR/o6Mi0lEZ CIIdxC03RKnsx2G/6SJpXuckLtVw1kXWVTYauSg= X-Google-Smtp-Source: AK7set/td3giVdEyQMU1/tNN5LqZolXDlM06sT0CPDRovFBWDn9DIptflRFLfdzI+M12SsOBkGWKxw== X-Received: by 2002:a05:600c:1e84:b0:3dc:5aba:f287 with SMTP id be4-20020a05600c1e8400b003dc5abaf287mr10085611wmb.23.1675432913358; Fri, 03 Feb 2023 06:01:53 -0800 (PST) Received: from jerome-BL.. (192.201.68.85.rev.sfr.net. [85.68.201.192]) by smtp.gmail.com with ESMTPSA id g24-20020a7bc4d8000000b003df30c94850sm6859209wmk.25.2023.02.03.06.01.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Feb 2023 06:01:52 -0800 (PST) From: Jerome Neanne To: tony@atomide.com, lee@kernel.org Cc: linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org, khilman@baylibre.com, nm@ti.com, afd@ti.com, msp@baylibre.com, Jerome Neanne Subject: [PATCH] mfd: tps65219: Add support for soft shutdown via sys-off API Date: Fri, 3 Feb 2023 15:01:50 +0100 Message-Id: <20230203140150.13071-1-jneanne@baylibre.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Use new API for power-off mode support: Link: https://lwn.net/Articles/894511/ Link: https://lore.kernel.org/all/7hfseqa7l0.fsf@baylibre.com/ sys-off API allows support of shutdown handler and restart handler. Shutdown was not supported before that enhancement. This is required for platform that are not using PSCI. Test: - restart: # reboot Default is cold reset: # cat /sys/kernel/reboot/mode Switch boot mode to warm reset: # echo warm > /sys/kernel/reboot/mode - power-off: # halt Tested on AM62-SP-SK board. Signed-off-by: Jerome Neanne Suggested-by: Andrew Davis Reviewed-by: Andrew Davis --- drivers/mfd/tps65219.c | 45 +++++++++++++++++++++++++++++++----------- 1 file changed, 34 insertions(+), 11 deletions(-) diff --git a/drivers/mfd/tps65219.c b/drivers/mfd/tps65219.c index 0e402fda206b..c134f3f6e202 100644 --- a/drivers/mfd/tps65219.c +++ b/drivers/mfd/tps65219.c @@ -25,25 +25,34 @@ static int tps65219_cold_reset(struct tps65219 *tps) TPS65219_MFP_COLD_RESET_I2C_CTRL_MASK); } -static int tps65219_restart(struct notifier_block *this, - unsigned long reboot_mode, void *cmd) +static int tps65219_soft_shutdown(struct tps65219 *tps) { - struct tps65219 *tps; + return regmap_update_bits(tps->regmap, TPS65219_REG_MFP_CTRL, + TPS65219_MFP_I2C_OFF_REQ_MASK, + TPS65219_MFP_I2C_OFF_REQ_MASK); +} - tps = container_of(this, struct tps65219, nb); +static int tps65219_power_off_handler(struct sys_off_data *data) +{ + tps65219_soft_shutdown(data->cb_data); + return NOTIFY_DONE; +} +static int tps65219_restart(struct tps65219 *tps, + unsigned long reboot_mode) +{ if (reboot_mode == REBOOT_WARM) tps65219_warm_reset(tps); else tps65219_cold_reset(tps); - return NOTIFY_DONE; } -static struct notifier_block pmic_rst_restart_nb = { - .notifier_call = tps65219_restart, - .priority = 200, -}; +static int tps65219_restart_handler(struct sys_off_data *data) +{ + tps65219_restart(data->cb_data, data->mode); + return NOTIFY_DONE; +} static const struct resource tps65219_pwrbutton_resources[] = { DEFINE_RES_IRQ_NAMED(TPS65219_INT_PB_FALLING_EDGE_DETECT, "falling"), @@ -269,13 +278,27 @@ static int tps65219_probe(struct i2c_client *client) } } - tps->nb = pmic_rst_restart_nb; - ret = register_restart_handler(&tps->nb); + ret = devm_register_sys_off_handler(tps->dev, + SYS_OFF_MODE_RESTART, + SYS_OFF_PRIO_HIGH, + tps65219_restart_handler, + tps); + if (ret) { dev_err(tps->dev, "cannot register restart handler, %d\n", ret); return ret; } + ret = devm_register_sys_off_handler(tps->dev, + SYS_OFF_MODE_POWER_OFF, + SYS_OFF_PRIO_DEFAULT, + tps65219_power_off_handler, + tps); + if (ret) { + dev_err(tps->dev, "failed to register sys-off handler: %d\n", + ret); + return ret; + } return 0; }