From patchwork Tue Feb 8 18:35:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Jacques Hiblot X-Patchwork-Id: 12739201 X-Patchwork-Delegate: geert@linux-m68k.org 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 3AAA4C433FE for ; Tue, 8 Feb 2022 18:43:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1385450AbiBHSnm (ORCPT ); Tue, 8 Feb 2022 13:43:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37750 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1385363AbiBHSnj (ORCPT ); Tue, 8 Feb 2022 13:43:39 -0500 X-Greylist: delayed 463 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Tue, 08 Feb 2022 10:43:12 PST Received: from smtpout1.mo3004.mail-out.ovh.net (smtpout1.mo3004.mail-out.ovh.net [79.137.123.219]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2AA74C03FEFB; Tue, 8 Feb 2022 10:43:12 -0800 (PST) Received: from pro2.mail.ovh.net (unknown [10.109.138.36]) by mo3004.mail-out.ovh.net (Postfix) with ESMTPS id 002FD2473F2; Tue, 8 Feb 2022 18:35:33 +0000 (UTC) Received: from localhost.localdomain (88.125.132.78) by DAG1EX2.emp2.local (172.16.2.2) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.18; Tue, 8 Feb 2022 19:35:33 +0100 From: Jean-Jacques Hiblot To: , CC: Jean-Jacques Hiblot , Michael Turquette , Stephen Boyd , , Subject: [PATCH v2 6/6] clk: renesas: r9a06g032: Disable the watchdog reset sources when halting Date: Tue, 8 Feb 2022 19:35:10 +0100 Message-ID: <20220208183511.2925304-7-jjhiblot@traphandler.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220208183511.2925304-1-jjhiblot@traphandler.com> References: <20220208183511.2925304-1-jjhiblot@traphandler.com> MIME-Version: 1.0 X-Originating-IP: [88.125.132.78] X-ClientProxiedBy: DAG1EX1.emp2.local (172.16.2.1) To DAG1EX2.emp2.local (172.16.2.2) X-Ovh-Tracer-Id: 13255782555140831707 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvvddrheejgdduudduucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuqfggjfdpvefjgfevmfevgfenuceurghilhhouhhtmecuhedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhephffvufffkffojghfggfgtghisehtkeertdertddtnecuhfhrohhmpeflvggrnhdqlfgrtghquhgvshcujfhisghlohhtuceojhhjhhhisghlohhtsehtrhgrphhhrghnughlvghrrdgtohhmqeenucggtffrrghtthgvrhhnpeefueeggfeiuedthfdvgeevtedvueevgfevgeelieelveevheefjeejfffguddukeenucfkpheptddrtddrtddrtddpkeekrdduvdehrddufedvrdejkeenucevlhhushhtvghrufhiiigvpedvnecurfgrrhgrmhepmhhouggvpehsmhhtphhouhhtpdhhvghlohepphhrohdvrdhmrghilhdrohhvhhdrnhgvthdpihhnvghtpedtrddtrddtrddtpdhmrghilhhfrhhomhepjhhjhhhisghlohhtsehtrhgrphhhrghnughlvghrrdgtohhmpdhnsggprhgtphhtthhopedupdhrtghpthhtoheplhhinhhugidqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghlrdhorhhg Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org The watchdog reset sources must be disabled when the system is halted. Otherwise the watchdogs will trigger a reset if they have been armed. Signed-off-by: Jean-Jacques Hiblot --- drivers/clk/renesas/r9a06g032-clocks.c | 30 ++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/drivers/clk/renesas/r9a06g032-clocks.c b/drivers/clk/renesas/r9a06g032-clocks.c index c99942f0e4d4..d96211927a1d 100644 --- a/drivers/clk/renesas/r9a06g032-clocks.c +++ b/drivers/clk/renesas/r9a06g032-clocks.c @@ -129,6 +129,11 @@ enum { K_GATE = 0, K_FFC, K_DIV, K_BITSEL, K_DUALGATE }; #define R9A06G032_CLOCK_COUNT (R9A06G032_UART_GROUP_34567 + 1) +#define R9A06G032_SYSCTRL_REG_RSTEN 0x120 +#define WDA7RST1 BIT(2) +#define WDA7RST0 BIT(1) +#define MRESET BIT(0) + static const struct r9a06g032_clkdesc r9a06g032_clocks[] = { D_ROOT(CLKOUT, "clkout", 25, 1), D_ROOT(CLK_PLL_USB, "clk_pll_usb", 12, 10), @@ -893,6 +898,19 @@ static void r9a06g032_clocks_del_clk_provider(void *data) of_clk_del_provider(data); } +static void r9a06g032_reset_sources(struct r9a06g032_priv *clocks, + uint32_t mask, uint32_t value) +{ + uint32_t rsten; + unsigned long flags; + + spin_lock_irqsave(&clocks->lock, flags); + rsten = readl(clocks->reg); + rsten = (rsten & ~mask) | (value & mask); + writel(rsten, clocks->reg + R9A06G032_SYSCTRL_REG_RSTEN); + spin_unlock_irqrestore(&clocks->lock, flags); +} + static int __init r9a06g032_clocks_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -910,6 +928,8 @@ static int __init r9a06g032_clocks_probe(struct platform_device *pdev) if (!clocks || !clks) return -ENOMEM; + platform_set_drvdata(pdev, clocks); + spin_lock_init(&clocks->lock); clocks->data.clks = clks; @@ -963,9 +983,18 @@ static int __init r9a06g032_clocks_probe(struct platform_device *pdev) if (error) return error; + return r9a06g032_add_clk_domain(dev); } +static void r9a06g032_clocks_shutdown(struct platform_device *pdev) +{ + struct r9a06g032_priv *clocks = platform_get_drvdata(pdev); + + /* Disable the watchdog reset sources */ + r9a06g032_reset_sources(clocks, WDA7RST0 | WDA7RST1, 0); +} + static const struct of_device_id r9a06g032_match[] = { { .compatible = "renesas,r9a06g032-sysctrl" }, { } @@ -976,6 +1005,7 @@ static struct platform_driver r9a06g032_clock_driver = { .name = "renesas,r9a06g032-sysctrl", .of_match_table = r9a06g032_match, }, + .shutdown = r9a06g032_clocks_shutdown, }; static int __init r9a06g032_clocks_init(void)