From patchwork Sat Nov 16 08:18:25 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Bianconi X-Patchwork-Id: 13877506 X-Patchwork-Delegate: kw@linux.com 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 1447338382; Sat, 16 Nov 2024 08:19:32 +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=1731745172; cv=none; b=q0af4yUfRl+bqQ4gEeJuvDoBJZ+85ZGII+6g4RbbVkFk/9ZFud3x1H1ibGcRyKoY39gTLH+j5Rxx6OwkR1Ik4t9ohHAjt6I/zDVLT42tdZMp3oRzJ+jE7DHSggBTjzCHliTFYIBlhRjcXnQD+H5aDj2x/STA348TKAKcWK2ukVM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731745172; c=relaxed/simple; bh=GCOmRbv/GyYdnHeXa5q5vrx3cB5TAF+dSdL665F3kuE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=K1TioXjBQNablq1xwV47Ah76VLgN/mg6e7Kz+mU6QwhJuFJVHLluAp9QU+jFLlvD0/fbYn2lG+HbVc+VXY13ALp9SwraSBkSq3g7uPnRdSwVoekitHsF2SenwlmoZGnAWJCRuPinTrRB7LnYeCltZOaneqVMw1t6Qd2q4vJhhtk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MO5STveO; 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="MO5STveO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6D290C4CEC3; Sat, 16 Nov 2024 08:19:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1731745171; bh=GCOmRbv/GyYdnHeXa5q5vrx3cB5TAF+dSdL665F3kuE=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=MO5STveOVD0odbSgLIzSj/yq1GdC7poAi7FEnmHg+3sKxl4fm0Aqp6/mvYCGHq5Jo IlnRpPxwGsZZZbTCIqwFWml87iKrbTZOgXkT4x4SdPGCaSXxD+ySsinDvstOy4f20X QPAfXVTugoivf4Rt+OPYCJ2NUaNpec5IJbjGl+CIJXrBkzGSE/l91lRxft3DnOBpyA uBasviRc7HqVfUHf9t/oFITErP3ptGDhSZ2tcI8s01amyOWeHYM52rSaq80jxbC8Vi ME4uodSh3QS8xpRiNXtwRMQ3X544fERN1CrVKqNGZV/fLlwqcHYGH1Z8Qg2AlpB7nF MT9/VM5giFWXA== From: Lorenzo Bianconi Date: Sat, 16 Nov 2024 09:18:25 +0100 Subject: [PATCH v3 4/6] PCI: mediatek-gen3: Add comment about initialization order in mtk_pcie_en7581_power_up() Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241116-pcie-en7581-fixes-v3-4-f7add3afc27e@kernel.org> References: <20241116-pcie-en7581-fixes-v3-0-f7add3afc27e@kernel.org> In-Reply-To: <20241116-pcie-en7581-fixes-v3-0-f7add3afc27e@kernel.org> To: Ryder Lee , Jianjun Wang , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy?= =?utf-8?q?=C5=84ski?= , Manivannan Sadhasivam , Rob Herring , Bjorn Helgaas , Philipp Zabel , Matthias Brugger , AngeloGioacchino Del Regno , Michael Turquette , Stephen Boyd Cc: linux-pci@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org, Lorenzo Bianconi X-Mailer: b4 0.14.2 Add a comment in mtk_pcie_en7581_power_up() to clarify, unlike MediaTek PCIe controller, the Airoha EN7581 requires PHY initialization and power-on before PHY reset deassert. Reviewed-by: Manivannan Sadhasivam Signed-off-by: Lorenzo Bianconi --- drivers/pci/controller/pcie-mediatek-gen3.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c index 2b80edd4462ad4e9f2a5d192db7f99307113eb8a..dd30530a43b1097871acc9e76a7534f30819432d 100644 --- a/drivers/pci/controller/pcie-mediatek-gen3.c +++ b/drivers/pci/controller/pcie-mediatek-gen3.c @@ -928,6 +928,10 @@ static int mtk_pcie_en7581_power_up(struct mtk_gen3_pcie *pcie) */ mdelay(PCIE_EN7581_RESET_TIME_MS); + /* + * Unlike the MediaTek controllers, the Airoha EN7581 requires PHY + * initialization and power-on before PHY reset deassert. + */ err = phy_init(pcie->phy); if (err) { dev_err(dev, "failed to initialize PHY\n");