| Message ID | 20210926095847.38261-3-sven@svenpeter.dev (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add Apple M1 support to PASemi i2c driver | expand |
On Sun, Sep 26, 2021 at 12:00 PM Sven Peter <sven@svenpeter.dev> wrote: > > 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@svenpeter.dev> > > + smbus->ioaddr = ioport_map(smbus->base, smbus->size); > + if (!smbus->ioaddr) { > + error = -EBUSY; > + goto out_release_region; > + } While this works, I would suggest using the more regular pci_iomap() or pcim_iomap() helper to turn the port number into an __iomem token. Arnd
On Mon, Sep 27, 2021, at 09:39, Arnd Bergmann wrote: > On Sun, Sep 26, 2021 at 12:00 PM Sven Peter <sven@svenpeter.dev> wrote: >> >> 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@svenpeter.dev> >> >> + smbus->ioaddr = ioport_map(smbus->base, smbus->size); >> + if (!smbus->ioaddr) { >> + error = -EBUSY; >> + goto out_release_region; >> + } > > While this works, I would suggest using the more regular pci_iomap() > or pcim_iomap() helper to turn the port number into an __iomem token. Thanks a lot for the review! I'll replace it with pci_iomap here and then later in this series with pcim_iomap when also switching the rest to devres. Thanks, Sven
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); }
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@svenpeter.dev> --- drivers/i2c/busses/i2c-pasemi.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-)