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 5FB23C7EE2F for ; Wed, 1 Mar 2023 16:07:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229880AbjCAQHh (ORCPT ); Wed, 1 Mar 2023 11:07:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58252 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229511AbjCAQHe (ORCPT ); Wed, 1 Mar 2023 11:07:34 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 024D737708; Wed, 1 Mar 2023 08:07:33 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id B6811B8103F; Wed, 1 Mar 2023 16:07:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AFC52C433D2; Wed, 1 Mar 2023 16:07:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1677686850; bh=cry1Q2K76OClVdDMe8SjHbwxo+86zstNJ0kkh2LlQbY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=nOKCaFTZBNgLs+isIU6edX/9IErGI8BThzyIHWbXyBOp3vhHR+v6PDzd5WjJr5Clu HeV2S8sgIZ6iZVA4+C8nMXLaFuigi5QxhinKGPwFUxVQCREeWdzPxLDnTaxxfzq6YG QCGGcwJpNpbPxOjiRJCP1D7s4olW/Q8SRYDKlaqshtkR/R+wFvkBmB8IAAWZVqhSAL OVl6dT1nzfnxjjvu7UDkJIdwGG46tnY2762wPnceIItKqy37VD/vNofCTC9oDTlz6J gnIg08viqUn2fyKr6dunqT6Je/F/b3yowwL0n7V94KIvqkWw/c51ZSUPUcPzzHvA+x heOXPk+uRwjKw== Date: Wed, 1 Mar 2023 16:07:25 +0000 From: Lee Jones To: Jerome Neanne Cc: tony@atomide.com, linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org, khilman@baylibre.com, nm@ti.com, afd@ti.com, msp@baylibre.com Subject: Re: [PATCH] mfd: tps65219: Add support for soft shutdown via sys-off API Message-ID: References: <20230203140150.13071-1-jneanne@baylibre.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20230203140150.13071-1-jneanne@baylibre.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 03 Feb 2023, Jerome Neanne wrote: > 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 A review from Andrew would be helpful here. > --- > 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; > } > > -- > 2.34.1 > -- Lee Jones [李琼斯]