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 08BEDC433EF for ; Wed, 13 Apr 2022 02:06:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231658AbiDMCIm (ORCPT ); Tue, 12 Apr 2022 22:08:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231644AbiDMCIf (ORCPT ); Tue, 12 Apr 2022 22:08:35 -0400 Received: from mail-pl1-x62c.google.com (mail-pl1-x62c.google.com [IPv6:2607:f8b0:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CFE8D2613D for ; Tue, 12 Apr 2022 19:06:15 -0700 (PDT) Received: by mail-pl1-x62c.google.com with SMTP id be5so662738plb.13 for ; Tue, 12 Apr 2022 19:06:15 -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=Nzvi/7I6o4g6gT+tWp3ktIpiQNQJRFeE4veqO2lT0Cg=; b=eKqKjAr4pOgRkVvIywuOKZrA+1JkHZeB4DPvaRtX84pupA4Xh5uCCFwBf/j/bXki4E zoeT5mfIoFWi8E1Sh5ibmDqxmgTg7YwjJRpXDwCWIW3g6evCufRybe/GWHJvsKwiPsd9 Kp/8cBV9wAGkugBu0ibCIvB8Z1tDuVuvQoWmgDZewT9BYepvWDzLydrACLsatYhAzRTs d2XwCkg9PxcJZ3/uj2bJkFnCzV8JtQ/LwDQ2gHzyGuTodr/DAUqYgZLF0X1PRKJRUMrI xEqo6ofkXQsE+RkQLqKelZGTcOEsKc+421+M2mg8Mpmu08vZDHDhTXmkkHp9UN0fnz9c VZLA== 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=Nzvi/7I6o4g6gT+tWp3ktIpiQNQJRFeE4veqO2lT0Cg=; b=8PJ02E6D5GqZ4uo5y77R4TLC4VRq02e0TqrddDbCiOAF1DsbFgqmygT9WUFpjeXeSd se8EYyzRTSywiJ14o/AKIQa8XifKq4fnKZRcI5mm0sjPyR+jn2S+yaSqO3YoOwJ79Tml q7KuEV8bcphmAd6edEzAYeBjA2Uv7vUCseayFT27E1c55yoOB6k9l3LY0ZNNRz3S8V8A PF8IXAa13KRNdsuI5GC1a6Z2+LrQ0XpJTAJrWkl3iR9MQCMZN7UuAmC23n2j5jxKg3Vz K0VDaOBZXoryNxaAJMzYSUsBmH8wPkCUglha7f4CDOdJEzyWHsV/7KsD5hx7Foe/Ex3d QZwg== X-Gm-Message-State: AOAM533/tekrb9Zu0206SxhXm6teu1M8YsXO8DAIYEmIU39H7QfHc6XO UvGAq77/iE2G0N34EYRAaHF9wQ== X-Google-Smtp-Source: ABdhPJz4RdYgxf39eBGJAQQcu/L60B2/GMbOeS1p/vMQQ88FQqB1pwtDxzR3Z9fyqDxnG04Jk8W7+w== X-Received: by 2002:a17:90b:1642:b0:1c7:2497:3807 with SMTP id il2-20020a17090b164200b001c724973807mr8088350pjb.176.1649815575283; Tue, 12 Apr 2022 19:06:15 -0700 (PDT) Received: from x1.hsd1.or.comcast.net ([2601:1c2:1001:7090:669f:cec7:c0c2:1cc]) by smtp.gmail.com with ESMTPSA id o3-20020aa79783000000b00505f720bb76sm4234053pfp.215.2022.04.12.19.06.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Apr 2022 19:06:14 -0700 (PDT) From: Drew Fustini To: Rob Herring , Krzysztof Kozlowski , Dave Gerlach , Tony Lindgren , Nishanth Menon , Santosh Shilimkar Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Drew Fustini , Keerthy Subject: [PATCH 2/2] soc: ti: wkup_m3_ipc: Add support for IO Isolation Date: Tue, 12 Apr 2022 19:06:41 -0700 Message-Id: <20220413020641.2789408-3-dfustini@baylibre.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220413020641.2789408-1-dfustini@baylibre.com> References: <20220413020641.2789408-1-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 --- 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