From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AF2FF382397; Tue, 19 May 2026 06:10:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779171020; cv=none; b=H0VdH0dR1Ez3AJwIzW33FV9YYcchZkPQDyGoVfXlTCDG8L+L6vMe9Irx/6e2Z15FeiRYbInN90OXSRTTDTQY/xByMOymkr+o6DsgF7t6APR4m1Um1FA++lBB5cowbcFJMiJIjB6doC5KdEsM0up0TPUEmd9CRinw18XpbLpXDO0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779171020; c=relaxed/simple; bh=wpKGBlOYBdKJ4Q3xmvvS2FfxdbVWdVLuU4ffh+M1+ug=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=o8b11N2ZFzPmIDcdNYnYGw0M0Z1PjhUPATuDnrT3V8mMbopu8fYT+6oiyNBm2cDri4t7Jl0dc24HiuwVqX13ZXPyYOKSSoiLrgM7xiqroXaaCU62n3XSMRAkpG3mszBda9SdkAv/Aq1AFf8UkPsQzQk55x4vYTkq06SQqPypKj4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=euTm77qq; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="euTm77qq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 20626C2BCC6; Tue, 19 May 2026 06:10:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1779171020; bh=wpKGBlOYBdKJ4Q3xmvvS2FfxdbVWdVLuU4ffh+M1+ug=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=euTm77qqOUp4jCvU4+5FWlkNyePO9vaVjVdyEekosoS2uR1WHOI4eE2wOe+lYRJvA epkCk1DzgqJw0ldntiv7TNjsQi7mHy58vkalUuI71Q5RpLjF/RqZNQREpqll7nyum3 C/Omy2aJWpBN0+VprN/WodxdGb1gAS/GpgCGs8Yah7qZvDMobEQEP8n1LLvAr5ujAt HxsJUAOzcqGbT/DFAatNRjtJe3SVcNFz47tAWHZ73MVlxWtf0s3ka4Gm+kIGE/bBSJ C7alvT1hTtCqlopqcW6VAivP3aIqMLj8ii2Hlumi3cdT5zo7p1ufu3znZ+kDMGmh5a 5YMtwkY0WZkJA== From: Jisheng Zhang To: Alexandre Belloni , Frank Li , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Philipp Zabel Cc: linux-i3c@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 4/4] i3c: dw: Add apb reset support Date: Tue, 19 May 2026 13:51:05 +0800 Message-ID: <20260519055105.13079-5-jszhang@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260519055105.13079-1-jszhang@kernel.org> References: <20260519055105.13079-1-jszhang@kernel.org> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add support of apb reset which is to reset the APB interface. Signed-off-by: Jisheng Zhang --- drivers/i3c/master/dw-i3c-master.c | 7 +++++++ drivers/i3c/master/dw-i3c-master.h | 1 + 2 files changed, 8 insertions(+) diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c index c4a848cc978a..ae7aa6880e8f 100644 --- a/drivers/i3c/master/dw-i3c-master.c +++ b/drivers/i3c/master/dw-i3c-master.c @@ -1591,6 +1591,11 @@ int dw_i3c_common_probe(struct dw_i3c_master *master, if (IS_ERR(master->core_rst)) return PTR_ERR(master->core_rst); + master->apb_rst = devm_reset_control_get_optional_exclusive_deasserted(&pdev->dev, + "apb"); + if (IS_ERR(master->apb_rst)) + return PTR_ERR(master->apb_rst); + spin_lock_init(&master->xferqueue.lock); INIT_LIST_HEAD(&master->xferqueue.list); @@ -1765,6 +1770,7 @@ static int __maybe_unused dw_i3c_master_runtime_suspend(struct device *dev) dw_i3c_master_disable(master); reset_control_assert(master->core_rst); + reset_control_assert(master->apb_rst); dw_i3c_master_disable_clks(master); pinctrl_pm_select_sleep_state(dev); return 0; @@ -1777,6 +1783,7 @@ static int __maybe_unused dw_i3c_master_runtime_resume(struct device *dev) pinctrl_pm_select_default_state(dev); dw_i3c_master_enable_clks(master); reset_control_deassert(master->core_rst); + reset_control_deassert(master->apb_rst); dw_i3c_master_set_intr_regs(master); dw_i3c_master_restore_timing_regs(master); diff --git a/drivers/i3c/master/dw-i3c-master.h b/drivers/i3c/master/dw-i3c-master.h index c5cb695c16ab..a4ba60043288 100644 --- a/drivers/i3c/master/dw-i3c-master.h +++ b/drivers/i3c/master/dw-i3c-master.h @@ -37,6 +37,7 @@ struct dw_i3c_master { struct dw_i3c_master_caps caps; void __iomem *regs; struct reset_control *core_rst; + struct reset_control *apb_rst; struct clk *core_clk; struct clk *pclk; char version[5]; -- 2.53.0