linux-kernel - [RFC PATCH 3/3] PCI: mt7621: Use PCI_CONF1_EXT

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Date:   Sun, 11 Sep 2022 13:20:24 +0200
From:   Pali Rohár <pali@...nel.org>
To:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Sergio Paracuellos <sergio.paracuellos@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: [RFC PATCH 3/3] PCI: mt7621: Use PCI_CONF1_EXT_ADDRESS() macro

Simplify pcie-mt7621.c driver code and use new PCI_CONF1_EXT_ADDRESS()
macro for accessing PCIe config space.

Signed-off-by: Pali Rohár <pali@...nel.org>
---
 drivers/pci/controller/pcie-mt7621.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/pcie-mt7621.c b/drivers/pci/controller/pcie-mt7621.c
index 33eb37a2225c..28cde116cd27 100644
--- a/drivers/pci/controller/pcie-mt7621.c
+++ b/drivers/pci/controller/pcie-mt7621.c
@@ -25,6 +25,7 @@
 #include <linux/of_pci.h>
 #include <linux/of_platform.h>
 #include <linux/pci.h>
+#include <linux/pci-conf1.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
 #include <linux/reset.h>
@@ -123,8 +124,7 @@ static inline void pcie_port_write(struct mt7621_pcie_port *port,
 static inline u32 mt7621_pcie_get_cfgaddr(unsigned int bus, unsigned int slot,
 					 unsigned int func, unsigned int where)
 {
-	return (((where & 0xf00) >> 8) << 24) | (bus << 16) | (slot << 11) |
-		(func << 8) | (where & 0xfc) | 0x80000000;
+	return PCI_CONF1_EXT_ADDRESS(bus, slot, func, where);
 }
 
 static void __iomem *mt7621_pcie_map_bus(struct pci_bus *bus,
-- 
2.20.1