From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 01D193EBF3D for ; Mon, 25 May 2026 14:19:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779718777; cv=none; b=QhryVKwRI686VDyxLOy6pFuhBnz3fVIC5Z0u8vDo8GhPPjh+fIKki01g47fOmrkuIbMnlhIBGstIKvvg/SmQ3CWv2GXGb7yWfZ4ThzabVsKooa6hKUfdGCD8N2qmK/Iyrsu01KjvoJQ9lURm5WJsini1yJdHjlgJAUcZQBEHNpY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779718777; c=relaxed/simple; bh=3454wlriFBYA1PmIAk/pGLH1G5fs1iNZBJZwMOMScAc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=EWNuoXZu2Kfi7jHmvV4hlYh6ZcfSkAQIHRrQJkYqsZwnOF097ItZxBPTv8gmYHjdGzEFjNSEEuwIVij9zOq0qo9V5JIzkv2tyrExPv7pgVeMA0AJfUfY+zXf1cpe7+SOkhDsrGiExlWyImoMqjkAAj6owbnrjoTTJz+6Afgfb68= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MuUrOMR6; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="MuUrOMR6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2E88E1F00A3A; Mon, 25 May 2026 14:19:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779718775; bh=bPu7j/mMHJlEE+0Cgycs0SQITX74H+h2HkTBrHZqBMs=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=MuUrOMR6rcurzMMB4nRyiG2hEVzBzqU6B6Lp3bdj1TI0y2xEAq2vWSJtvPtSJSmTN UmE2ERXJB3NOfAax94J+jOv3bsEA2WQN2f1U9rRTpUzu7TSwzVBva3Ep5Aub8atT8d IVpFjja1vBFovgd1Dw0swLLqvSl0EWL6U3yr9YfU7pP5AEeBNkI0KpCOJvX6ieqJLR tZrOFTIOJfJNCyDGMWCtaz70DbND/kf9+cpVXGDNvl3Eh5d+QnvydYLOup3lTv8VkP Z+S6HW3NLPw7tZD//a8NHhH3V1dqZESB/qWezN3iab1Qnb06HsH1eUbiMwWsOwd1+t ytcgSZR9S9A2g== 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 Subject: [PATCH v4 3/3] i3c: dw: Add apb reset support Date: Mon, 25 May 2026 22:00:18 +0800 Message-ID: <20260525140018.19598-4-jszhang@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260525140018.19598-1-jszhang@kernel.org> References: <20260525140018.19598-1-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 655693a2187e..9de54d584bc3 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_rst"); + 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