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Date: Tue, 2 Mar 2010 11:06:44 +0100
From: Samuel Ortiz <sameo@...ux.intel.com>
To: Denis Turischev <denis@...pulab.co.il>
Cc: LKML <linux-kernel@...r.kernel.org>, linux-i2c@...r.kernel.org
Subject: Re: [PATCH v4 2/3] i2c: convert i2c-isch to platform_device
Hi Denis,
On Mon, Mar 01, 2010 at 06:59:55PM +0200, 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
> v4: refreshed again
Patch applied, many thanks.
Cheers,
Samuel.
> Signed-off-by: Denis Turischev <denis@...pulab.co.il>
>
> ---
> 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@...el.com>");
> @@ -337,3 +322,4 @@ MODULE_LICENSE("GPL");
>
> module_init(i2c_sch_init);
> module_exit(i2c_sch_exit);
> +MODULE_ALIAS("platform:isch_smbus");
> --
> 1.6.3.3
--
Intel Open Source Technology Centre
http://oss.intel.com/
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