linux-kernel - [PATCH 02/10] i2c: pasemi: Use io{read,write}32

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Message-Id: <20210926095847.38261-3-sven@svenpeter.dev>
Date:   Sun, 26 Sep 2021 11:58:39 +0200
From:   Sven Peter <sven@...npeter.dev>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Olof Johansson <olof@...om.net>
Cc:     Sven Peter <sven@...npeter.dev>, Arnd Bergmann <arnd@...db.de>,
        Hector Martin <marcan@...can.st>,
        Mohamed Mediouni <mohamed.mediouni@...amail.com>,
        Stan Skowronek <stan@...ellium.com>,
        Mark Kettenis <mark.kettenis@...all.nl>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        linux-arm-kernel@...ts.infradead.org,
        linuxppc-dev@...ts.ozlabs.org, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 02/10] i2c: pasemi: Use io{read,write}32

In preparation for splitting this driver up into a platform_driver
and a pci_driver, replace outl/inl usage with ioport_map and
ioread32/iowrite32.

Signed-off-by: Sven Peter <sven@...npeter.dev>
---
 drivers/i2c/busses/i2c-pasemi.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/i2c/busses/i2c-pasemi.c b/drivers/i2c/busses/i2c-pasemi.c
index 20f2772c0e79..dd31d902a621 100644
--- a/drivers/i2c/busses/i2c-pasemi.c
+++ b/drivers/i2c/busses/i2c-pasemi.c
@@ -20,6 +20,7 @@ static struct pci_driver pasemi_smb_driver;
 struct pasemi_smbus {
 	struct pci_dev		*dev;
 	struct i2c_adapter	 adapter;
+	void __iomem		*ioaddr;
 	unsigned long		 base;
 	int			 size;
 };
@@ -53,13 +54,13 @@ static inline void reg_write(struct pasemi_smbus *smbus, int reg, int val)
 {
 	dev_dbg(&smbus->dev->dev, "smbus write reg %lx val %08x\n",
 		smbus->base + reg, val);
-	outl(val, smbus->base + reg);
+	iowrite32(val, smbus->ioaddr + reg);
 }
 
 static inline int reg_read(struct pasemi_smbus *smbus, int reg)
 {
 	int ret;
-	ret = inl(smbus->base + reg);
+	ret = ioread32(smbus->ioaddr + reg);
 	dev_dbg(&smbus->dev->dev, "smbus read reg %lx val %08x\n",
 		smbus->base + reg, ret);
 	return ret;
@@ -351,6 +352,12 @@ static int pasemi_smb_probe(struct pci_dev *dev,
 		goto out_kfree;
 	}
 
+	smbus->ioaddr = ioport_map(smbus->base, smbus->size);
+	if (!smbus->ioaddr) {
+		error = -EBUSY;
+		goto out_release_region;
+	}
+
 	smbus->adapter.owner = THIS_MODULE;
 	snprintf(smbus->adapter.name, sizeof(smbus->adapter.name),
 		 "PA Semi SMBus adapter at 0x%lx", smbus->base);
@@ -366,12 +373,14 @@ static int pasemi_smb_probe(struct pci_dev *dev,
 
 	error = i2c_add_adapter(&smbus->adapter);
 	if (error)
-		goto out_release_region;
+		goto out_ioport_unmap;
 
 	pci_set_drvdata(dev, smbus);
 
 	return 0;
 
+ out_ioport_unmap:
+	ioport_unmap(smbus->ioaddr);
  out_release_region:
 	release_region(smbus->base, smbus->size);
  out_kfree:
@@ -384,6 +393,7 @@ static void pasemi_smb_remove(struct pci_dev *dev)
 	struct pasemi_smbus *smbus = pci_get_drvdata(dev);
 
 	i2c_del_adapter(&smbus->adapter);
+	ioport_unmap(smbus->ioaddr);
 	release_region(smbus->base, smbus->size);
 	kfree(smbus);
 }
-- 
2.25.1