From patchwork Sat Aug 20 07:16:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mithil Bavishi X-Patchwork-Id: 598852 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 6B5BCC32772 for ; Sat, 20 Aug 2022 07:17:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343862AbiHTHRf (ORCPT ); Sat, 20 Aug 2022 03:17:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58276 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343851AbiHTHRd (ORCPT ); Sat, 20 Aug 2022 03:17:33 -0400 Received: from mail-pf1-x433.google.com (mail-pf1-x433.google.com [IPv6:2607:f8b0:4864:20::433]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 82673C6947; Sat, 20 Aug 2022 00:17:32 -0700 (PDT) Received: by mail-pf1-x433.google.com with SMTP id y141so6101723pfb.7; Sat, 20 Aug 2022 00:17:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc; bh=NaF0Qk2p6j2196mNUJaF8uknQCNZGqPcFXW4blntr18=; b=JCBmNFewKTYyy3azun5/TuWRXSH+3XD273uPDSPRl37mfN0afYyoUA7pdya1QaU3L/ hoF3B8K6/Bs7eYnCCu+CCrIRragkX58pIVOyzcoDQblmtQKcVNMEWe4gWeVS+HoUhj/+ l2PdmX3kLjkuc0bn84u/AI8P5MmYjyI28zfE2Dto5xEYubt0jcisrJl7VHpcpNN8wpCg A2r51iteAajnOQfsmprDIVBIMMAvJMPiz0qGzHvgiDntxVQ1d8jVn1dJgn0CU09grxIU K9GutODXoVi6SmVZSnPAwU7cT1qF6PqO7F+Wc+PW8c53KUeMjCptDtmr/hdRiPnH+Cum yx8Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc; bh=NaF0Qk2p6j2196mNUJaF8uknQCNZGqPcFXW4blntr18=; b=ZOhBb+lNyhjYJF81nQKqLnkiWX2LkrL2M5+se+fdWu90HSrXuUcupRQi6dRXmSMEdh 2wLgTcVFcKTJKaBVWLLb2uVbWVnra06rKflk7o02ktYT3Dqa7XVMjPfHdUJQNYa+hchm bGJOR8Rnz1vlNHZiGQvzor3/VTjQiwm/LwZqkqXwh7TfCxeGvX/IpwUa8+pQsndhC0sm eRyAF0P/Qmxx/hYSGabbojyCx/6O1qtffIYuBEAngeyL0tgsjSGr6tMDMpvk85cjw/pu Qa0kcTCCQHsJ24wVno8RJkI+AbVrzCmlw3ckG3a7tiZDxBzzpoNBbx5ZeGNwQy1F4Ab5 4r6g== X-Gm-Message-State: ACgBeo0/uq8uPEn4dWT+U5oULtnSNg+cocDb+z0yL0HtWWFC8aL7Fdbr Fd/lCWRAThOp6mwrGVy5wzxm92zt4wdGtO99988= X-Google-Smtp-Source: AA6agR5e4LbPReWIOgnjJpHOBuF592FLzh2H9BusO1kFefpEOrAcugidLU4zG1E8aJSmOANkruyB+g== X-Received: by 2002:a63:1624:0:b0:41a:9dea:1c80 with SMTP id w36-20020a631624000000b0041a9dea1c80mr9203015pgl.400.1660979851663; Sat, 20 Aug 2022 00:17:31 -0700 (PDT) Received: from mithil.localdomain ([103.19.226.223]) by smtp.gmail.com with ESMTPSA id j15-20020a17090a694f00b001faf273e4afsm1459019pjm.35.2022.08.20.00.17.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 20 Aug 2022 00:17:31 -0700 (PDT) From: Mithil Bavishi To: linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: dmitry.torokhov@gmail.com, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, lee@kernel.org, sre@kernel.org, tony@atomide.com, linux@armlinux.org.uk, bavishimithil@gmail.com, contact@paulk.fr Subject: [PATCH 03/10] power: reset: Add TWL6030 power driver, with minimal support for power off Date: Sat, 20 Aug 2022 12:46:53 +0530 Message-Id: <20220820071659.1215-4-bavishimithil@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220820071659.1215-1-bavishimithil@gmail.com> References: <20220820071659.1215-1-bavishimithil@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org From: Paul Kocialkowski This adds a TWL6030 power driver, that currently only supports powering off the device when the TWL is used as system power controller. This driver might be extended to support more power-related features of the TWL6030. Signed-off-by: Paul Kocialkowski Signed-off-by: Mithil Bavishi --- drivers/power/reset/Kconfig | 10 ++++ drivers/power/reset/Makefile | 1 + drivers/power/reset/twl6030-power.c | 93 +++++++++++++++++++++++++++++ 3 files changed, 104 insertions(+) create mode 100644 drivers/power/reset/twl6030-power.c diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index 39117b697..5156b1613 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -316,3 +316,13 @@ config TWL4030_POWER and load scripts controlling which resources are switched off/on or reset when a sleep, wakeup or warm reset event occurs. endif + +config TWL6030_POWER + bool "TI TWL6030 power resources" + depends on TWL4030_CORE && ARM + help + Say yes here if you want to use the power resources on the + TWL6030 family chips. + + When used as system power controller, this driver allows turning off + the main power supply. diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index e9db25b09..692d51cef 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -37,3 +37,4 @@ obj-$(CONFIG_POWER_RESET_SC27XX) += sc27xx-poweroff.o obj-$(CONFIG_NVMEM_REBOOT_MODE) += nvmem-reboot-mode.o obj-$(CONFIG_POWER_MLXBF) += pwr-mlxbf.o obj-$(CONFIG_TWL4030_POWER) += twl4030-power.o +obj-$(CONFIG_TWL6030_POWER) += twl6030-power.o diff --git a/drivers/power/reset/twl6030-power.c b/drivers/power/reset/twl6030-power.c new file mode 100644 index 000000000..78c8a02a3 --- /dev/null +++ b/drivers/power/reset/twl6030-power.c @@ -0,0 +1,93 @@ +/* + * TWL6030 power + * + * Copyright (C) 2016 Paul Kocialkowski + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include + +#define TWL6030_PHOENIX_DEV_ON 0x25 + +#define TWL6030_PHOENIX_APP_DEVOFF BIT(0) +#define TWL6030_PHOENIX_CON_DEVOFF BIT(1) +#define TWL6030_PHOENIX_MOD_DEVOFF BIT(2) + +void twl6030_power_off(void) +{ + int err; + + err = twl_i2c_write_u8(TWL6030_MODULE_ID0, TWL6030_PHOENIX_APP_DEVOFF | + TWL6030_PHOENIX_CON_DEVOFF | TWL6030_PHOENIX_MOD_DEVOFF, + TWL6030_PHOENIX_DEV_ON); + if (err) + pr_err("TWL6030 Unable to power off\n"); +} + +static bool twl6030_power_use_poweroff(struct device_node *node) +{ + if (of_property_read_bool(node, "ti,system-power-controller")) + return true; + + return false; +} + +#ifdef CONFIG_OF +static const struct of_device_id twl6030_power_of_match[] = { + { + .compatible = "ti,twl6030-power", + }, + { }, +}; + +MODULE_DEVICE_TABLE(of, twl6030_power_of_match); +#endif /* CONFIG_OF */ + +static int twl6030_power_probe(struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + + if (!node) { + dev_err(&pdev->dev, "Platform data is missing\n"); + return -EINVAL; + } + + /* Board has to be wired properly to use this feature */ + if (twl6030_power_use_poweroff(node) && !pm_power_off) + pm_power_off = twl6030_power_off; + + return 0; +} + +static int twl6030_power_remove(struct platform_device *pdev) +{ + return 0; +} + +static struct platform_driver twl6030_power_driver = { + .driver = { + .name = "twl6030_power", + .of_match_table = of_match_ptr(twl6030_power_of_match), + }, + .probe = twl6030_power_probe, + .remove = twl6030_power_remove, +}; + +module_platform_driver(twl6030_power_driver); + +MODULE_AUTHOR("Paul Kocialkowski "); +MODULE_DESCRIPTION("Power management for TWL6030"); +MODULE_LICENSE("GPL");