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gpio: Convert cs5535 from pci device to platform device

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The cs5535-mfd driver now takes care of the PCI BAR handling; this
simplifies the gpio driver a lot.

Signed-off-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Andres Salomon 2010-10-23 00:41:09 -07:00 committed by Samuel Ortiz
parent 816b4580ce
commit df96669401
1 changed files with 31 additions and 62 deletions
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93
drivers/gpio/cs5535-gpio.c
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@ -11,14 +11,13 @@
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <linux/cs5535.h>
#include <asm/msr.h>
#define DRV_NAME "cs5535-gpio"
#define GPIO_BAR 1
/*
* Some GPIO pins
@ -47,7 +46,7 @@ static struct cs5535_gpio_chip {
struct gpio_chip chip;
resource_size_t base;
struct pci_dev *pdev;
struct platform_device *pdev;
spinlock_t lock;
} cs5535_gpio_chip;
@ -301,10 +300,10 @@ static struct cs5535_gpio_chip cs5535_gpio_chip = {
},
};
static int __init cs5535_gpio_probe(struct pci_dev *pdev,
const struct pci_device_id *pci_id)
static int __devinit cs5535_gpio_probe(struct platform_device *pdev)
{
int err;
struct resource *res;
int err = -EIO;
ulong mask_orig = mask;
/* There are two ways to get the GPIO base address; one is by
@ -314,25 +313,24 @@ static int __init cs5535_gpio_probe(struct pci_dev *pdev,
* it turns out to be unreliable in the face of crappy BIOSes, we
* can always go back to using MSRs.. */
err = pci_enable_device_io(pdev);
if (err) {
dev_err(&pdev->dev, "can't enable device IO\n");
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!res) {
dev_err(&pdev->dev, "can't fetch device resource info\n");
goto done;
}
err = pci_request_region(pdev, GPIO_BAR, DRV_NAME);
if (err) {
dev_err(&pdev->dev, "can't alloc PCI BAR #%d\n", GPIO_BAR);
if (!request_region(res->start, resource_size(res), pdev->name)) {
dev_err(&pdev->dev, "can't request region\n");
goto done;
}
/* set up the driver-specific struct */
cs5535_gpio_chip.base = pci_resource_start(pdev, GPIO_BAR);
cs5535_gpio_chip.base = res->start;
cs5535_gpio_chip.pdev = pdev;
spin_lock_init(&cs5535_gpio_chip.lock);
dev_info(&pdev->dev, "allocated PCI BAR #%d: base 0x%llx\n", GPIO_BAR,
(unsigned long long) cs5535_gpio_chip.base);
dev_info(&pdev->dev, "region 0x%x - 0x%x reserved\n",
res->start, res->end);
/* mask out reserved pins */
mask &= 0x1F7FFFFF;
@ -350,78 +348,49 @@ static int __init cs5535_gpio_probe(struct pci_dev *pdev,
if (err)
goto release_region;
dev_info(&pdev->dev, DRV_NAME ": GPIO support successfully loaded.\n");
dev_info(&pdev->dev, "GPIO support successfully loaded.\n");
return 0;
release_region:
pci_release_region(pdev, GPIO_BAR);
release_region(res->start, resource_size(res));
done:
return err;
}
static void __exit cs5535_gpio_remove(struct pci_dev *pdev)
static int __devexit cs5535_gpio_remove(struct platform_device *pdev)
{
struct resource *r;
int err;
err = gpiochip_remove(&cs5535_gpio_chip.chip);
if (err) {
/* uhh? */
dev_err(&pdev->dev, "unable to remove gpio_chip?\n");
return err;
}
pci_release_region(pdev, GPIO_BAR);
r = platform_get_resource(pdev, IORESOURCE_IO, 0);
release_region(r->start, resource_size(r));
return 0;
}
static struct pci_device_id cs5535_gpio_pci_tbl[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) },
{ 0, },
static struct platform_driver cs5535_gpio_drv = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
},
.probe = cs5535_gpio_probe,
.remove = __devexit_p(cs5535_gpio_remove),
};
MODULE_DEVICE_TABLE(pci, cs5535_gpio_pci_tbl);
/*
* We can't use the standard PCI driver registration stuff here, since
* that allows only one driver to bind to each PCI device (and we want
* multiple drivers to be able to bind to the device). Instead, manually
* scan for the PCI device, request a single region, and keep track of the
* devices that we're using.
*/
static int __init cs5535_gpio_scan_pci(void)
{
struct pci_dev *pdev;
int err = -ENODEV;
int i;
for (i = 0; i < ARRAY_SIZE(cs5535_gpio_pci_tbl); i++) {
pdev = pci_get_device(cs5535_gpio_pci_tbl[i].vendor,
cs5535_gpio_pci_tbl[i].device, NULL);
if (pdev) {
err = cs5535_gpio_probe(pdev, &cs5535_gpio_pci_tbl[i]);
if (err)
pci_dev_put(pdev);
/* we only support a single CS5535/6 southbridge */
break;
}
}
return err;
}
static void __exit cs5535_gpio_free_pci(void)
{
cs5535_gpio_remove(cs5535_gpio_chip.pdev);
pci_dev_put(cs5535_gpio_chip.pdev);
}
static int __init cs5535_gpio_init(void)
{
return cs5535_gpio_scan_pci();
return platform_driver_register(&cs5535_gpio_drv);
}
static void __exit cs5535_gpio_exit(void)
{
cs5535_gpio_free_pci();
platform_driver_unregister(&cs5535_gpio_drv);
}
module_init(cs5535_gpio_init);