From patchwork Fri Jun 7 11:14:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Niklas Cassel X-Patchwork-Id: 13689725 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 4E72BC27C53 for ; Fri, 7 Jun 2024 11:15:14 +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:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=8zGfc3ajFUKURllRyfBh+T8D4xGHg5H7ksC6t8Rm9F4=; b=j8kwMMx3Fcveu4 6MZEmFa/I2OlGZ1JY4Ewp5OPrxO+gtdY1A3e3nZzU213JlyWlRx8SOFa+f/PlH+EJld5juG+zoyMU 75UbaRdy/grHfb0SZC3qjnmVSP6hAjiv14sRgunVh4XSfaqm/v2PF9WeKmu6GK5RpKt+wCRLmsvxc FipLQ8N8iuiVvNzgnsrF9Sz6kvgwOLmMVthMjwgiLlpT3EZAHCfXL7u2m05ftjCsSKyACXBj4hDTb sslpOTBDD+wliP/JDBV1wITfCybBjrS5qZ/sEkVxkZUYsPq15ZIWZqFKle80C9JpnEZatpU4LigKp yi8j3pAiqWTK4rA0dkzw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sFXYs-0000000Dfrm-27Ao; Fri, 07 Jun 2024 11:15:10 +0000 Received: from sin.source.kernel.org ([145.40.73.55]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sFXYp-0000000Dfpz-2L7Z for linux-rockchip@lists.infradead.org; Fri, 07 Jun 2024 11:15:09 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id DAFC5CE1CC0; Fri, 7 Jun 2024 11:15:05 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4CE6EC4AF09; Fri, 7 Jun 2024 11:15:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1717758905; bh=Do8GU9Lg2HtlRwxkwoHL7mqEXY9onLHHOVGqL0ZdFBk=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=uRTdJ0dIfABOQpolMQUyKwBxLeRdBZY4qaI5j6f8qMN2UiFO67np69LnIrjtok4QK VXbECs6MdxqRc4biUIo79SuHs/Nm0p+Ilw1GfqERduAr9viPMnqIEHVaN6Y2fh8HXR xQntYkZ8gHx2yvp2jXqoozFzyXydPMtlfevflTj6zz40ZtRFEwBunyUDL10JyYlZkR 2aweCOjOJyxKrg3DfFdVES8tJJIOaT2uIABdGFY64s4EOeqlH3pMbTm2NirFgv3uPm UHhcMzBYZ2hxIgP9BJMzhmJEkb/bqS0X4kMSyzbV6d+I8ZelMd04Mw0ADGnqwbAcMV LAUU4UoLdzTuA== From: Niklas Cassel Date: Fri, 07 Jun 2024 13:14:28 +0200 Subject: [PATCH v5 08/13] PCI: dw-rockchip: Add rockchip_pcie_get_ltssm() helper MIME-Version: 1.0 Message-Id: <20240607-rockchip-pcie-ep-v1-v5-8-0a042d6b0049@kernel.org> References: <20240607-rockchip-pcie-ep-v1-v5-0-0a042d6b0049@kernel.org> In-Reply-To: <20240607-rockchip-pcie-ep-v1-v5-0-0a042d6b0049@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=1497; i=cassel@kernel.org; h=from:subject:message-id; bh=Do8GU9Lg2HtlRwxkwoHL7mqEXY9onLHHOVGqL0ZdFBk=; b=owGbwMvMwCV2MsVw8cxjvkWMp9WSGNKSXk8SLA+vkj/EPy1TSmob8ynOL4+PHLZfOvf+PDWz5 Vuero2e1lHKwiDGxSArpsji+8Nlf3G3+5TjindsYOawMoEMYeDiFICJpE9nZJh9sm9jof2/iVva Xv1LdO7jNVpZP2H7w/Pzth89YFh/vXwFw//MlctPM/Nl6XUIpvNffntdueLmhAsxr58nSgSU12/ bys4HAA== X-Developer-Key: i=cassel@kernel.org; a=openpgp; fpr=5ADE635C0E631CBBD5BE065A352FE6582ED9B5DA X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240607_041508_077860_19485645 X-CRM114-Status: UNSURE ( 9.62 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org Add a rockchip_pcie_ltssm() helper function that reads the LTSSM status. This helper will be used in additional places in follow-up commits. Signed-off-by: Niklas Cassel Reviewed-by: Manivannan Sadhasivam --- 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 3dfed08ef456..1380e3a5284b 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 u32 rockchip_pcie_get_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_get_ltssm(rockchip); if ((val & PCIE_LINKUP) == PCIE_LINKUP && (val & PCIE_LTSSM_STATUS_MASK) == PCIE_L0S_ENTRY)