From patchwork Wed Apr 24 15:16:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Niklas Cassel X-Patchwork-Id: 13642013 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 9F3DE15EFC7; Wed, 24 Apr 2024 15:17:04 +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=1713971824; cv=none; b=Eifjr1j91le1bvsu4dCv51AN/X1aEk2e/Lo2GBalH9yDelEsiJnrfPzpn+qNU/8rW9UtYJ6Tqef3usUW/Sc2Wt08SB/gBpQqvcOtAM0g7km8HnY0BlO//cO3tNlxgCb5fQMKgY/uB8b92v5LLSCtCK1bxZg8iBIWO9C/QlTdl0c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713971824; c=relaxed/simple; bh=FF5kjYOiGGFH7JDZ21aiyiTHxQMew/SAJYkr6QWZ3L0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=sxcaMhDHB6sLNNYPx67U7qBY3GbGXLgs13iiEMGmoxl3jdxTqO9UrrEk9AgXZqsxBwN9v/Pbsvq0uOh4gjjWuzR8Vqcs/UefhcNjY4B+biCzr469yZrXG0YfH/7uRZcUmlbi+hx9fbOMTOqSbzA7tr+rsggizcuil5A3AP79Nj4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gPXtupJw; 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="gPXtupJw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 72145C32781; Wed, 24 Apr 2024 15:17:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1713971824; bh=FF5kjYOiGGFH7JDZ21aiyiTHxQMew/SAJYkr6QWZ3L0=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=gPXtupJwvQI0VzNSJo08xI3gOu5/Ce1onCCtgbRBU6w8nIhyI//SwKptY+X7V6a6f 4gJurYIcOHkLnZEiQ6wdrqxWIITWxirB/R1+xIAj9NXcCbr/1IP08znLyJV2SHoDPx 1KTfbwwXe6PNs2rVnjWCAyEij0Asw2irl7clK4658/EjDGwqJZ+cc8iy3LiDAf/5uG DdV1EKmOoADD7FgjfDEchDS4nHBFO8KpW+K489iJ8WkTjrGlSYJCf4i2yfGSKSgBja YSRS8q5NcIanAf4IresMrEZlTMnNtgW+0TgWiaye/tkzSzhPE+xI39qO0TBhld4pjB ije6TNVTw4qWQ== From: Niklas Cassel Date: Wed, 24 Apr 2024 17:16:24 +0200 Subject: [PATCH 06/12] PCI: dw-rockchip: Add rockchip_pcie_ltssm() helper Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240424-rockchip-pcie-ep-v1-v1-6-b1a02ddad650@kernel.org> References: <20240424-rockchip-pcie-ep-v1-v1-0-b1a02ddad650@kernel.org> In-Reply-To: <20240424-rockchip-pcie-ep-v1-v1-0-b1a02ddad650@kernel.org> To: Jingoo Han , Manivannan Sadhasivam , Bjorn Helgaas , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy?= =?utf-8?q?=C5=84ski?= , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner , Niklas Cassel , Kishon Vijay Abraham I , Arnd Bergmann , Damien Le Moal , Jon Lin , Shawn Lin , Simon Xue Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-rockchip@lists.infradead.org X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1425; i=cassel@kernel.org; h=from:subject:message-id; bh=FF5kjYOiGGFH7JDZ21aiyiTHxQMew/SAJYkr6QWZ3L0=; b=owGbwMvMwCV2MsVw8cxjvkWMp9WSGNI0lYI6nypunOamvWVTwsu+uqMWanlv+yY39C54Hjxr4 ikv2YOzOkpZGMS4GGTFFFl8f7jsL+52n3Jc8Y4NzBxWJpAhDFycAjCRRW4M//Rv2ccwtHZM0zzF UfJZNDyzRnlxM7/GLrUNSvNcriRrlTL8dzi9KMCW5VKW2KcwsV/y61b+8FJ7F/ZXn+v3movfG1l d2AA= X-Developer-Key: i=cassel@kernel.org; a=openpgp; fpr=5ADE635C0E631CBBD5BE065A352FE6582ED9B5DA Add a rockchip_pcie_ltssm() helper function that reads the LTSSM status. This helper will be used in additional places in follow-up patches. Signed-off-by: Niklas Cassel --- drivers/pci/controller/dwc/pcie-dw-rockchip.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/dwc/pcie-dw-rockchip.c b/drivers/pci/controller/dwc/pcie-dw-rockchip.c index 1993c430b90c..4023fd86176f 100644 --- a/drivers/pci/controller/dwc/pcie-dw-rockchip.c +++ b/drivers/pci/controller/dwc/pcie-dw-rockchip.c @@ -143,6 +143,11 @@ static int rockchip_pcie_init_irq_domain(struct rockchip_pcie *rockchip) return 0; } +static inline u32 rockchip_pcie_ltssm(struct rockchip_pcie *rockchip) +{ + return rockchip_pcie_readl_apb(rockchip, PCIE_CLIENT_LTSSM_STATUS); +} + static void rockchip_pcie_enable_ltssm(struct rockchip_pcie *rockchip) { rockchip_pcie_writel_apb(rockchip, PCIE_CLIENT_ENABLE_LTSSM, @@ -152,7 +157,7 @@ static void rockchip_pcie_enable_ltssm(struct rockchip_pcie *rockchip) static int rockchip_pcie_link_up(struct dw_pcie *pci) { struct rockchip_pcie *rockchip = to_rockchip_pcie(pci); - u32 val = rockchip_pcie_readl_apb(rockchip, PCIE_CLIENT_LTSSM_STATUS); + u32 val = rockchip_pcie_ltssm(rockchip); if ((val & PCIE_LINKUP) == PCIE_LINKUP && (val & PCIE_LTSSM_STATUS_MASK) == PCIE_L0S_ENTRY)