From patchwork Fri Nov 10 00:30:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Golle X-Patchwork-Id: 13451937 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C3ECFC04E85 for ; Fri, 10 Nov 2023 00:31:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=K1jtNYga7hu9UVirnLw+hYkMAYNKrIEGxG1usIWtvHE=; b=3QMaIkLz0bylhv BZEk470Qz2z6UEtN5+qT0E8DDAM/We4/E16PCBlcKjGhFMZJdry4t8Uf72ZUB1hs+FTYaw7Ef0PMR piUqZ9CvFZNO4QR9wAPOE+cblhzn7bvBa9YW+Hp4/dw1wxh5Wgx+G2J028AJjsijU/PDgIIXrslZJ 84WRI9gcpu4FJDDl5y0mQreXU7c83CN+SSqr4Qb/x2BW6rNgHaHSlVkkEYqfFCjsmnJLDmauhCm47 mBtGicHnjEj4YAh527yp8f0OKWPAURkTQDB1bGpqAGxZdiNbgw8Av4q0OLNtTRz+zuSCshZMdNDH9 g5sLN5DhaoN0fHCcPqZQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1r1FQC-007WXm-0I; Fri, 10 Nov 2023 00:30:52 +0000 Received: from pidgin.makrotopia.org ([185.142.180.65]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1r1FQ9-007WWy-2C; Fri, 10 Nov 2023 00:30:51 +0000 Received: from local by pidgin.makrotopia.org with esmtpsa (TLS1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.96.2) (envelope-from ) id 1r1FPz-00041m-2U; Fri, 10 Nov 2023 00:30:39 +0000 Date: Fri, 10 Nov 2023 00:30:36 +0000 From: Daniel Golle To: Wim Van Sebroeck , Guenter Roeck , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno , Philipp Zabel , linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: [PATCH 2/2] watchdog: mediatek: mt7988: add wdt support Message-ID: References: <6912f6f406bc45674020681184f3eeca2f2cb63f.1699576174.git.daniel@makrotopia.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <6912f6f406bc45674020681184f3eeca2f2cb63f.1699576174.git.daniel@makrotopia.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231109_163049_722515_67B742FB X-CRM114-Status: GOOD ( 17.93 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add support for watchdog and reset generator unit of the MediaTek MT7988 SoC. Signed-off-by: Daniel Golle --- drivers/watchdog/mtk_wdt.c | 56 +++++++++++++++++++++++++++++++++++++- 1 file changed, 55 insertions(+), 1 deletion(-) diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c index b2330b16b497a..b98b8c29735aa 100644 --- a/drivers/watchdog/mtk_wdt.c +++ b/drivers/watchdog/mtk_wdt.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -58,6 +59,8 @@ #define WDT_SWSYSRST 0x18U #define WDT_SWSYS_RST_KEY 0x88000000 +#define WDT_SWSYSRST_EN 0xfc + #define DRV_NAME "mtk-wdt" #define DRV_VERSION "1.0" @@ -71,44 +74,85 @@ struct mtk_wdt_dev { struct reset_controller_dev rcdev; bool disable_wdt_extrst; bool reset_by_toprgu; + bool has_swsysrst_en; }; struct mtk_wdt_data { int toprgu_sw_rst_num; + bool has_swsysrst_en; }; static const struct mtk_wdt_data mt2712_data = { .toprgu_sw_rst_num = MT2712_TOPRGU_SW_RST_NUM, + .has_swsysrst_en = false, }; static const struct mtk_wdt_data mt6795_data = { .toprgu_sw_rst_num = MT6795_TOPRGU_SW_RST_NUM, + .has_swsysrst_en = false, }; static const struct mtk_wdt_data mt7986_data = { .toprgu_sw_rst_num = MT7986_TOPRGU_SW_RST_NUM, + .has_swsysrst_en = false, +}; + +static const struct mtk_wdt_data mt7988_data = { + .toprgu_sw_rst_num = MT7988_TOPRGU_SW_RST_NUM, + .has_swsysrst_en = true, }; static const struct mtk_wdt_data mt8183_data = { .toprgu_sw_rst_num = MT8183_TOPRGU_SW_RST_NUM, + .has_swsysrst_en = false, }; static const struct mtk_wdt_data mt8186_data = { .toprgu_sw_rst_num = MT8186_TOPRGU_SW_RST_NUM, + .has_swsysrst_en = false, }; static const struct mtk_wdt_data mt8188_data = { .toprgu_sw_rst_num = MT8188_TOPRGU_SW_RST_NUM, + .has_swsysrst_en = false, }; static const struct mtk_wdt_data mt8192_data = { .toprgu_sw_rst_num = MT8192_TOPRGU_SW_RST_NUM, + .has_swsysrst_en = false, }; static const struct mtk_wdt_data mt8195_data = { .toprgu_sw_rst_num = MT8195_TOPRGU_SW_RST_NUM, + .has_swsysrst_en = false, }; +static int toprgu_reset_sw_enable(struct reset_controller_dev *rcdev, + unsigned long id, bool enable) +{ + unsigned int tmp; + unsigned long flags; + struct mtk_wdt_dev *data = + container_of(rcdev, struct mtk_wdt_dev, rcdev); + + if (!data->has_swsysrst_en) + return 0; + + spin_lock_irqsave(&data->lock, flags); + + tmp = readl(data->wdt_base + WDT_SWSYSRST_EN); + if (enable) + tmp |= BIT(id); + else + tmp &= ~BIT(id); + + writel(tmp, data->wdt_base + WDT_SWSYSRST_EN); + + spin_unlock_irqrestore(&data->lock, flags); + + return 0; +} + static int toprgu_reset_update(struct reset_controller_dev *rcdev, unsigned long id, bool assert) { @@ -135,13 +179,20 @@ static int toprgu_reset_update(struct reset_controller_dev *rcdev, static int toprgu_reset_assert(struct reset_controller_dev *rcdev, unsigned long id) { + int ret; + + ret = toprgu_reset_sw_enable(rcdev, id, true); + if (ret) + return ret; + return toprgu_reset_update(rcdev, id, true); } static int toprgu_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id) { - return toprgu_reset_update(rcdev, id, false); + toprgu_reset_update(rcdev, id, false); + return toprgu_reset_sw_enable(rcdev, id, false); } static int toprgu_reset(struct reset_controller_dev *rcdev, @@ -406,6 +457,8 @@ static int mtk_wdt_probe(struct platform_device *pdev) wdt_data->toprgu_sw_rst_num); if (err) return err; + + mtk_wdt->has_swsysrst_en = wdt_data->has_swsysrst_en; } mtk_wdt->disable_wdt_extrst = @@ -444,6 +497,7 @@ static const struct of_device_id mtk_wdt_dt_ids[] = { { .compatible = "mediatek,mt6589-wdt" }, { .compatible = "mediatek,mt6795-wdt", .data = &mt6795_data }, { .compatible = "mediatek,mt7986-wdt", .data = &mt7986_data }, + { .compatible = "mediatek,mt7988-wdt", .data = &mt7988_data }, { .compatible = "mediatek,mt8183-wdt", .data = &mt8183_data }, { .compatible = "mediatek,mt8186-wdt", .data = &mt8186_data }, { .compatible = "mediatek,mt8188-wdt", .data = &mt8188_data },