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From:   Serge Semin <Sergey.Semin@baikalelectronics.ru>
To:     Jingoo Han <jingoohan1@gmail.com>,
        Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Rob Herring <robh@kernel.org>,
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CC:     Serge Semin <Sergey.Semin@baikalelectronics.ru>,
        Serge Semin <fancer.lancer@gmail.com>,
        Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@baikalelectronics.ru>,
        Frank Li <Frank.Li@nxp.com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
        <linux-pci@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH v2 09/13] PCI: dwc: Convert Link-up status method to using dw_pcie_readl_dbi()
Date:   Wed, 4 May 2022 00:22:56 +0300
Message-ID: <20220503212300.30105-10-Sergey.Semin@baikalelectronics.ru>
In-Reply-To: <20220503212300.30105-1-Sergey.Semin@baikalelectronics.ru>
References: <20220503212300.30105-1-Sergey.Semin@baikalelectronics.ru>
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While the rest of the generic DWC PCIe code is using the dedicated IO-mem
accessors, the dw_pcie_link_up() method for some unobvious reason directly
calls readl() to get PortLogic.DEBUG1 register content. Since the way the
dbi-bus is accessed can be platform-specific let's replace the direct dbi
memory space read procedure with the readl-wrapper invocation. Thus we'll
have a slightly more generic dw_pcie_link_up() method.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/pci/controller/dwc/pcie-designware.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index e3d2c11e6998..6e81264fdfb4 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -548,7 +548,7 @@ int dw_pcie_link_up(struct dw_pcie *pci)
 	if (pci->ops && pci->ops->link_up)
 		return pci->ops->link_up(pci);
 
-	val = readl(pci->dbi_base + PCIE_PORT_DEBUG1);
+	val = dw_pcie_readl_dbi(pci, PCIE_PORT_DEBUG1);
 	return ((val & PCIE_PORT_DEBUG1_LINK_UP) &&
 		(!(val & PCIE_PORT_DEBUG1_LINK_IN_TRAINING)));
 }
-- 
2.35.1