From mboxrd@z Thu Jan 1 00:00:00 1970 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 6C1E2C433EF for ; Thu, 14 Apr 2022 19:15:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345250AbiDNTRa (ORCPT ); Thu, 14 Apr 2022 15:17:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47550 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343881AbiDNTRP (ORCPT ); Thu, 14 Apr 2022 15:17:15 -0400 Received: from mail-pj1-x1035.google.com (mail-pj1-x1035.google.com [IPv6:2607:f8b0:4864:20::1035]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 927467247C for ; Thu, 14 Apr 2022 12:14:49 -0700 (PDT) Received: by mail-pj1-x1035.google.com with SMTP id ll10so5942604pjb.5 for ; Thu, 14 Apr 2022 12:14:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=sC6zeBvAQu12F4pHcyP2yBc/sNcvkHC/U+oaZNn0uLo=; b=uOPnNAUNUQ7jwwDqzHgu4WNfYdX+MgOjquYim4Yn6+bLjo/U9mt3hsGfQRcXEeWut5 nqL/4igPajYp6EQbXgUOKztmxoV53xEfPVMXWYvPWURmBhCKUM8owh4x++rNHcV0xiOM nzlpYQ/uQZcV0eSBfQC7/sUc+0yrIzADf5be71GbD9Asgna2j14fi/Rd0Bd90m1Xc2Be aezeNYzxz19ZnqxGMpbvRLSX+br0+p7fzY3zIHVdMqNIcDkCoqVBJIAHPDL5wUApbQxC yywvJYCxIPrqSjlUMp963ymQy0bLjWocfsTWrzrMJk0H+A8Yvw5aguyCpOWlQbeNiw0C VBgg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=sC6zeBvAQu12F4pHcyP2yBc/sNcvkHC/U+oaZNn0uLo=; b=Y/1a/DdzglEbdoTKWQ2WYPoLVAxRdi3HxVm+ph6TPvf1b0EVyHevWPS7MxmxIIoQm2 dhI1JFrOXb2YIy0BS+2GV12tfniNY9GNwgm763bN1rKag0xHyE/fUE9TQgY0sYmhgt1p 3cGm6Q1upaW/wINjdBzADgQcrkgMc7ARW75Lhpuq8Na11T3F97ShHcXgkC9NzpDD/Uev Zwr9oKtebDf6WOmPckIRjXHDB/IOGcbZ3p5wrSqaBHR3KZGFplO6ikL+sF3sLwG9bCCe 9pNTpcWMvfYz2oZsg4CaJ17ANAx47SYvESC1F/SmvroDcl+qUneIgNR5FvQJRBjVJm68 c9Xw== X-Gm-Message-State: AOAM532ErMEixtl2GEVW6+w2baOfeJ+8isLbd75rsWHVLZZM52jmR3Ay BAWOutu/dimV2BM5qzjhzBidmSEaGl248w== X-Google-Smtp-Source: ABdhPJyf50ZI8IugN/R07ThnGCCofq3wROK1WuuGeKtd9INnnt9Chq5pHi+VbR6o91yKZi9RNl/dvQ== X-Received: by 2002:a17:902:f68f:b0:158:4a47:5607 with SMTP id l15-20020a170902f68f00b001584a475607mr25312057plg.89.1649963689119; Thu, 14 Apr 2022 12:14:49 -0700 (PDT) Received: from x1.hsd1.or.comcast.net ([2601:1c2:1001:7090:5b60:6a76:138d:2646]) by smtp.gmail.com with ESMTPSA id e12-20020a056a001a8c00b004fab88d7de8sm614148pfv.132.2022.04.14.12.14.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Apr 2022 12:14:48 -0700 (PDT) From: Drew Fustini To: Rob Herring , Krzysztof Kozlowski , Nishanth Menon , Santosh Shilimkar , Dave Gerlach , Tony Lindgren Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Drew Fustini , Keerthy Subject: [PATCH v2 2/2] soc: ti: wkup_m3_ipc: Add support for IO Isolation Date: Thu, 14 Apr 2022 12:12:50 -0700 Message-Id: <20220414191250.2969282-3-dfustini@baylibre.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220414191250.2969282-1-dfustini@baylibre.com> References: <20220414191250.2969282-1-dfustini@baylibre.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dave Gerlach AM43xx support isolation of the IOs so that control is taken from the peripheral they are connected to and overridden by values present in the CTRL_CONF_* registers for the pad in the control module. The actual toggling happens from the wkup_m3, so use a DT property from the wkup_m3_ipc node to allow the PM code to communicate the necessity for placing the IOs into isolation to the firmware. Signed-off-by: Dave Gerlach Signed-off-by: Keerthy Signed-off-by: Drew Fustini --- No changes from v1 drivers/soc/ti/wkup_m3_ipc.c | 14 ++++++++++++-- include/linux/wkup_m3_ipc.h | 1 + 2 files changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/soc/ti/wkup_m3_ipc.c b/drivers/soc/ti/wkup_m3_ipc.c index 247a4b57a372..988162dd153a 100644 --- a/drivers/soc/ti/wkup_m3_ipc.c +++ b/drivers/soc/ti/wkup_m3_ipc.c @@ -46,6 +46,8 @@ #define IPC_VTT_STAT_MASK (0x1 << 3) #define IPC_VTT_GPIO_PIN_SHIFT (0x4) #define IPC_VTT_GPIO_PIN_MASK (0x3f << 4) +#define IPC_IO_ISOLATION_STAT_SHIFT (10) +#define IPC_IO_ISOLATION_STAT_MASK (0x1 << 10) #define M3_STATE_UNKNOWN 0 #define M3_STATE_RESET 1 @@ -228,6 +230,11 @@ static void wkup_m3_set_vtt_gpio(struct wkup_m3_ipc *m3_ipc, int gpio) (gpio << IPC_VTT_GPIO_PIN_SHIFT); } +static void wkup_m3_set_io_isolation(struct wkup_m3_ipc *m3_ipc) +{ + m3_ipc->isolation_conf = (1 << IPC_IO_ISOLATION_STAT_SHIFT); +} + /* Public functions */ /** * wkup_m3_set_mem_type - Pass wkup_m3 which type of memory is in use @@ -308,8 +315,8 @@ static int wkup_m3_prepare_low_power(struct wkup_m3_ipc *m3_ipc, int state) wkup_m3_ctrl_ipc_write(m3_ipc, m3_ipc->resume_addr, 0); wkup_m3_ctrl_ipc_write(m3_ipc, m3_power_state, 1); wkup_m3_ctrl_ipc_write(m3_ipc, m3_ipc->mem_type | - m3_ipc->vtt_conf, 4); - + m3_ipc->vtt_conf | + m3_ipc->isolation_conf, 4); wkup_m3_ctrl_ipc_write(m3_ipc, DS_IPC_DEFAULT, 2); wkup_m3_ctrl_ipc_write(m3_ipc, DS_IPC_DEFAULT, 3); wkup_m3_ctrl_ipc_write(m3_ipc, DS_IPC_DEFAULT, 5); @@ -518,6 +525,9 @@ static int wkup_m3_ipc_probe(struct platform_device *pdev) dev_warn(dev, "Invalid VTT GPIO(%d) pin\n", temp); } + if (of_find_property(np, "ti,set-io-isolation", NULL)) + wkup_m3_set_io_isolation(m3_ipc); + /* * Wait for firmware loading completion in a thread so we * can boot the wkup_m3 as soon as it's ready without holding diff --git a/include/linux/wkup_m3_ipc.h b/include/linux/wkup_m3_ipc.h index 2bc52c6381d5..b706eac58f92 100644 --- a/include/linux/wkup_m3_ipc.h +++ b/include/linux/wkup_m3_ipc.h @@ -34,6 +34,7 @@ struct wkup_m3_ipc { int mem_type; unsigned long resume_addr; int vtt_conf; + int isolation_conf; int state; struct completion sync_complete; -- 2.32.0