From patchwork Sun Nov 7 20:29:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sam Protsenko X-Patchwork-Id: 517851 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AC068C433FE for ; Sun, 7 Nov 2021 20:30:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8EF3261374 for ; Sun, 7 Nov 2021 20:30:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236624AbhKGUdI (ORCPT ); Sun, 7 Nov 2021 15:33:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55568 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236567AbhKGUct (ORCPT ); Sun, 7 Nov 2021 15:32:49 -0500 Received: from mail-lf1-x131.google.com (mail-lf1-x131.google.com [IPv6:2a00:1450:4864:20::131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C547BC061229 for ; Sun, 7 Nov 2021 12:30:00 -0800 (PST) Received: by mail-lf1-x131.google.com with SMTP id y26so31537517lfa.11 for ; Sun, 07 Nov 2021 12:30:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=9RBK6L5sPHBfA9E4ROAzR6qwhEdcT7uzmZdJODyoaHE=; b=p9s4I/1cufJuq7N0Ql9FShfZUL6xclTHtK9U+Dx+lKbOhZsM13PA/ZCCRlvRFmc8Kb MtrU1eNsAnbMh/kyjkPwTkTm2YQ6wXE0WASHANre6YZErjSObsip/S7WCKV++b83b+ef sylMJ3IKBsyKqk5zJSY/F5BE5zZgC6xPAWTNVFbAYCS0CoRiJk8IGX1f4SetNJTC5oCJ 5aGghZFhMT4AWXY2bi9M7+d7yKn1N7oFDwPUYqbSsACtd8kPWogkA9KbuiGn5kwQKo4j VU1IrSMGA/ZEeCrnFsPU3LdfDbWjbhYNMNZik+ACnXRkaZuJ4SNFKPbohE/b+Na4QZ1W S3GA== 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=9RBK6L5sPHBfA9E4ROAzR6qwhEdcT7uzmZdJODyoaHE=; b=v8YfL3vDS3skQ544nRYQb1Oyh4KS5HHwfu0GV4BzD3MLPdxulN3kXDasHjaGowUVZI Wspl9yAYjG7GzphicJ6HEocXotEdGMot2jO5xCjz020aAsjX+q3H4e+qpsX7yfLzz1zc gS+LaKVbXDiXiaiCcJ/Vyz/MkmREz8YHiM+QweY7kIM9o/cZBV5cFAbjqIxp4jqFBDMN pHSfyiDo222nTVKS6HYmMhi1K2H6THA7HI0Z35bD91HGmJE71TK71uYtIk/FlZalUDUR xLt2tP7Hkb97AmluaKu9J2BxF4jpVw74ZbPxU2YSrZPvgTY4P67cK3maug33m46P9WsK qOBw== X-Gm-Message-State: AOAM531rE+mkFWJ/BYW14tNUOkiIHQLFPAioIYPZE1MxWLAeDnNk3O+h 1t1+FdzEPhnHne0tyJmZhye+yoWrjJKNvmot X-Google-Smtp-Source: ABdhPJwMH3gpWIlfVe0lnvJlooRW94dMT8JoEqnaNL5EGkVfAh50QJ4xv4o3IlpkhzEjl/I2Et1Ugw== X-Received: by 2002:a05:6512:3192:: with SMTP id i18mr1355151lfe.569.1636316999205; Sun, 07 Nov 2021 12:29:59 -0800 (PST) Received: from localhost ([31.134.121.151]) by smtp.gmail.com with ESMTPSA id w15sm22444lfe.245.2021.11.07.12.29.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 07 Nov 2021 12:29:58 -0800 (PST) From: Sam Protsenko To: Wim Van Sebroeck , Guenter Roeck , Rob Herring , Krzysztof Kozlowski Cc: linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Subject: [PATCH v3 08/12] watchdog: s3c2410: Add support for WDT counter enable register Date: Sun, 7 Nov 2021 22:29:39 +0200 Message-Id: <20211107202943.8859-9-semen.protsenko@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211107202943.8859-1-semen.protsenko@linaro.org> References: <20211107202943.8859-1-semen.protsenko@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org On new Exynos chips (e.g. Exynos850) new CLUSTERx_NONCPU_OUT register is introduced, where CNT_EN_WDT bit must be enabled to make watchdog counter running. Add corresponding quirk and proper infrastructure to handle that register if the quirk is set. This commit doesn't bring any functional change to existing devices, but merely provides an infrastructure for upcoming chips support. Signed-off-by: Sam Protsenko Reviewed-by: Krzysztof Kozlowski Reviewed-by: Guenter Roeck --- Changes in v3: - Added R-b tag by Krzysztof Kozlowski Changes in v2: - Used quirks instead of callbacks for all added PMU registers - Used BIT() macro - Extracted cleanup code to separate patch to minimize changes and ease the review and porting drivers/watchdog/s3c2410_wdt.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-) diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c index 2a61b6ea5602..ec341c876225 100644 --- a/drivers/watchdog/s3c2410_wdt.c +++ b/drivers/watchdog/s3c2410_wdt.c @@ -60,11 +60,13 @@ #define QUIRK_HAS_RST_STAT (1 << 1) #define QUIRK_HAS_WTCLRINT_REG (1 << 2) #define QUIRK_HAS_PMU_AUTO_DISABLE (1 << 3) +#define QUIRK_HAS_PMU_CNT_EN (1 << 4) /* These quirks require that we have a PMU register map */ #define QUIRKS_HAVE_PMUREG (QUIRK_HAS_PMU_CONFIG | \ QUIRK_HAS_RST_STAT | \ - QUIRK_HAS_PMU_AUTO_DISABLE) + QUIRK_HAS_PMU_AUTO_DISABLE | \ + QUIRK_HAS_PMU_CNT_EN) static bool nowayout = WATCHDOG_NOWAYOUT; static int tmr_margin; @@ -98,6 +100,8 @@ MODULE_PARM_DESC(soft_noboot, "Watchdog action, set to 1 to ignore reboots, 0 to * @rst_stat_reg: Offset in pmureg for the register that has the reset status. * @rst_stat_bit: Bit number in the rst_stat register indicating a watchdog * reset. + * @cnt_en_reg: Offset in pmureg for the register that enables WDT counter. + * @cnt_en_bit: Bit number for "watchdog counter enable" in cnt_en register. * @quirks: A bitfield of quirks. */ @@ -108,6 +112,8 @@ struct s3c2410_wdt_variant { int mask_bit; int rst_stat_reg; int rst_stat_bit; + int cnt_en_reg; + int cnt_en_bit; u32 quirks; }; @@ -233,6 +239,20 @@ static int s3c2410wdt_mask_wdt_reset(struct s3c2410_wdt *wdt, bool mask) return ret; } +static int s3c2410wdt_enable_counter(struct s3c2410_wdt *wdt, bool en) +{ + const u32 mask_val = BIT(wdt->drv_data->cnt_en_bit); + const u32 val = en ? mask_val : 0; + int ret; + + ret = regmap_update_bits(wdt->pmureg, wdt->drv_data->cnt_en_reg, + mask_val, val); + if (ret < 0) + dev_err(wdt->dev, "failed to update reg(%d)\n", ret); + + return ret; +} + static int s3c2410wdt_mask_and_disable_reset(struct s3c2410_wdt *wdt, bool mask) { int ret; @@ -249,6 +269,12 @@ static int s3c2410wdt_mask_and_disable_reset(struct s3c2410_wdt *wdt, bool mask) return ret; } + if (wdt->drv_data->quirks & QUIRK_HAS_PMU_CNT_EN) { + ret = s3c2410wdt_enable_counter(wdt, !mask); + if (ret < 0) + return ret; + } + return 0; }