Re: [PATCH v3 2/3] i2c: convert i2c-isch to platform_device

[Mike Rapoport <mike@compulab.co.il>]

Hi Jean,

Denis Turischev wrote:
> v2: there is no acpi_check_region, it will be implemented in mfd-core
> v3: patch refreshed against the latest Linus tree
> 
> Signed-off-by: Denis Turischev <denis@compulab.co.il>

Any chance this can go to 2.6.34?

> ---
>  drivers/i2c/busses/Kconfig    |    2 +-
>  drivers/i2c/busses/i2c-isch.c |   68 
> ++++++++++++++++------------------------
>  2 files changed, 28 insertions(+), 42 deletions(-)
> 
> diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
> index 5f318ce..d15b6d3 100644
> --- a/drivers/i2c/busses/Kconfig
> +++ b/drivers/i2c/busses/Kconfig
> @@ -104,7 +104,7 @@ config I2C_I801
> 
>  config I2C_ISCH
>      tristate "Intel SCH SMBus 1.0"
> -    depends on PCI
> +    select LPC_SCH
>      help
>        Say Y here if you want to use SMBus controller on the Intel SCH
>        based systems.
> diff --git a/drivers/i2c/busses/i2c-isch.c b/drivers/i2c/busses/i2c-isch.c
> index dba6eb0..ddc258e 100644
> --- a/drivers/i2c/busses/i2c-isch.c
> +++ b/drivers/i2c/busses/i2c-isch.c
> @@ -27,7 +27,7 @@
>  */
> 
>  #include <linux/module.h>
> -#include <linux/pci.h>
> +#include <linux/platform_device.h>
>  #include <linux/kernel.h>
>  #include <linux/delay.h>
>  #include <linux/stddef.h>
> @@ -46,12 +46,6 @@
>  #define SMBHSTDAT1    (7 + sch_smba)
>  #define SMBBLKDAT    (0x20 + sch_smba)
> 
> -/* count for request_region */
> -#define SMBIOSIZE    64
> -
> -/* PCI Address Constants */
> -#define SMBBA_SCH    0x40
> -
>  /* Other settings */
>  #define MAX_TIMEOUT    500
> 
> @@ -63,7 +57,6 @@
>  #define SCH_BLOCK_DATA        0x05
> 
>  static unsigned short sch_smba;
> -static struct pci_driver sch_driver;
>  static struct i2c_adapter sch_adapter;
> 
>  /*
> @@ -256,37 +249,23 @@ static struct i2c_adapter sch_adapter = {
>      .algo        = &smbus_algorithm,
>  };
> 
> -static struct pci_device_id sch_ids[] = {
> -    { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SCH_LPC) },
> -    { 0, }
> -};
> -
> -MODULE_DEVICE_TABLE(pci, sch_ids);
> -
> -static int __devinit sch_probe(struct pci_dev *dev,
> -                const struct pci_device_id *id)
> +static int __devinit smbus_sch_probe(struct platform_device *dev)
>  {
> +    struct resource *res;
>      int retval;
> -    unsigned int smba;
> 
> -    pci_read_config_dword(dev, SMBBA_SCH, &smba);
> -    if (!(smba & (1 << 31))) {
> -        dev_err(&dev->dev, "SMBus I/O space disabled!\n");
> -        return -ENODEV;
> -    }
> +    res = platform_get_resource(dev, IORESOURCE_IO, 0);
> +    if (!res)
> +        return -EBUSY;
> 
> -    sch_smba = (unsigned short)smba;
> -    if (sch_smba == 0) {
> -        dev_err(&dev->dev, "SMBus base address uninitialized!\n");
> -        return -ENODEV;
> -    }
> -    if (acpi_check_region(sch_smba, SMBIOSIZE, sch_driver.name))
> -        return -ENODEV;
> -    if (!request_region(sch_smba, SMBIOSIZE, sch_driver.name)) {
> +    if (!request_region(res->start, resource_size(res), dev->name)) {
>          dev_err(&dev->dev, "SMBus region 0x%x already in use!\n",
>              sch_smba);
>          return -EBUSY;
>      }
> +
> +    sch_smba = res->start;
> +
>      dev_dbg(&dev->dev, "SMBA = 0x%X\n", sch_smba);
> 
>      /* set up the sysfs linkage to our parent device */
> @@ -298,37 +277,43 @@ static int __devinit sch_probe(struct pci_dev *dev,
>      retval = i2c_add_adapter(&sch_adapter);
>      if (retval) {
>          dev_err(&dev->dev, "Couldn't register adapter!\n");
> -        release_region(sch_smba, SMBIOSIZE);
> +        release_region(res->start, resource_size(res));
>          sch_smba = 0;
>      }
> 
>      return retval;
>  }
> 
> -static void __devexit sch_remove(struct pci_dev *dev)
> +static int __devexit smbus_sch_remove(struct platform_device *pdev)
>  {
> +    struct resource *res;
>      if (sch_smba) {
>          i2c_del_adapter(&sch_adapter);
> -        release_region(sch_smba, SMBIOSIZE);
> +        res = platform_get_resource(pdev, IORESOURCE_IO, 0);
> +        release_region(res->start, resource_size(res));
>          sch_smba = 0;
>      }
> +
> +    return 0;
>  }
> 
> -static struct pci_driver sch_driver = {
> -    .name        = "isch_smbus",
> -    .id_table    = sch_ids,
> -    .probe        = sch_probe,
> -    .remove        = __devexit_p(sch_remove),
> +static struct platform_driver smbus_sch_driver = {
> +    .driver = {
> +        .name = "isch_smbus",
> +        .owner = THIS_MODULE,
> +    },
> +    .probe        = smbus_sch_probe,
> +    .remove        = __devexit_p(smbus_sch_remove),
>  };
> 
>  static int __init i2c_sch_init(void)
>  {
> -    return pci_register_driver(&sch_driver);
> +    return platform_driver_register(&smbus_sch_driver);
>  }
> 
>  static void __exit i2c_sch_exit(void)
>  {
> -    pci_unregister_driver(&sch_driver);
> +    platform_driver_unregister(&smbus_sch_driver);
>  }
> 
>  MODULE_AUTHOR("Jacob Pan <jacob.jun.pan@intel.com>");
> @@ -337,3 +322,4 @@ MODULE_LICENSE("GPL");
> 
>  module_init(i2c_sch_init);
>  module_exit(i2c_sch_exit);
> +MODULE_ALIAS("platform:isch_smbus");


-- 
Sincerely yours,
Mike.