misc: Convert cs5535-mfgpt from pci device to platform device

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

Signed-off-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 21 insertions, 52 deletions

diff --git a/drivers/misc/cs5535-mfgpt.c b/drivers/misc/cs5535-mfgpt.c
index 6f6218061b0d..499bd64e4d1d 100644
--- a/drivers/misc/cs5535-mfgpt.c
+++ b/drivers/misc/cs5535-mfgpt.c
@@ -16,12 +16,11 @@
 #include <linux/spinlock.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
-#include <linux/pci.h>
+#include <linux/platform_device.h>
 #include <linux/cs5535.h>
 #include <linux/slab.h>
 
 #define DRV_NAME "cs5535-mfgpt"
-#define MFGPT_BAR 2
 
 static int mfgpt_reset_timers;
 module_param_named(mfgptfix, mfgpt_reset_timers, int, 0644);
@@ -37,7 +36,7 @@ static struct cs5535_mfgpt_chip {
         DECLARE_BITMAP(avail, MFGPT_MAX_TIMERS);
         resource_size_t base;
 
-        struct pci_dev *pdev;
+        struct platform_device *pdev;
         spinlock_t lock;
         int initialized;
 } cs5535_mfgpt_chip;
@@ -290,10 +289,10 @@ static int __init scan_timers(struct cs5535_mfgpt_chip *mfgpt)
         return timers;
 }
 
-static int __init cs5535_mfgpt_probe(struct pci_dev *pdev,
-                const struct pci_device_id *pci_id)
+static int __devinit cs5535_mfgpt_probe(struct platform_device *pdev)
 {
-        int err, t;
+        struct resource *res;
+        int err = -EIO, t;
 
         /* There are two ways to get the MFGPT base address; one is by
          * fetching it from MSR_LBAR_MFGPT, the other is by reading the
@@ -302,29 +301,28 @@ static int __init cs5535_mfgpt_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, MFGPT_BAR, DRV_NAME);
-        if (err) {
-                dev_err(&pdev->dev, "can't alloc PCI BAR #%d\n", MFGPT_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_mfgpt_chip.base = pci_resource_start(pdev, MFGPT_BAR);
+        cs5535_mfgpt_chip.base = res->start;
         cs5535_mfgpt_chip.pdev = pdev;
         spin_lock_init(&cs5535_mfgpt_chip.lock);
 
-        dev_info(&pdev->dev, "allocated PCI BAR #%d: base 0x%llx\n", MFGPT_BAR,
-                        (unsigned long long) cs5535_mfgpt_chip.base);
+        dev_info(&pdev->dev, "region 0x%x - 0x%x reserved\n", res->start,
+                        res->end);
 
         /* detect the available timers */
         t = scan_timers(&cs5535_mfgpt_chip);
-        dev_info(&pdev->dev, DRV_NAME ": %d MFGPT timers available\n", t);
+        dev_info(&pdev->dev, "%d MFGPT timers available\n", t);
         cs5535_mfgpt_chip.initialized = 1;
         return 0;
 
@@ -332,47 +330,18 @@ done:
         return err;
 }
 
-static struct pci_device_id cs5535_mfgpt_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_mfgpt_drv = {
+        .driver = {
+                .name = DRV_NAME,
+                .owner = THIS_MODULE,
+        },
+        .probe = cs5535_mfgpt_probe,
 };
-MODULE_DEVICE_TABLE(pci, cs5535_mfgpt_pci_tbl);
 
-/*
- * Just like with the cs5535-gpio driver, we can't use the standard PCI driver
- * registration stuff.  It only allows only one driver to bind to each PCI
- * device, and we want the GPIO and MFGPT drivers to be able to share a PCI
- * device.  Instead, we manually scan for the PCI device, request a single
- * region, and keep track of the devices that we're using.
- */
-
-static int __init cs5535_mfgpt_scan_pci(void)
-{
-        struct pci_dev *pdev;
-        int err = -ENODEV;
-        int i;
-
-        for (i = 0; i < ARRAY_SIZE(cs5535_mfgpt_pci_tbl); i++) {
-                pdev = pci_get_device(cs5535_mfgpt_pci_tbl[i].vendor,
-                                cs5535_mfgpt_pci_tbl[i].device, NULL);
-                if (pdev) {
-                        err = cs5535_mfgpt_probe(pdev,
-                                        &cs5535_mfgpt_pci_tbl[i]);
-                        if (err)
-                                pci_dev_put(pdev);
-
-                        /* we only support a single CS5535/6 southbridge */
-                        break;
-                }
-        }
-
-        return err;
-}
 
 static int __init cs5535_mfgpt_init(void)
 {
-        return cs5535_mfgpt_scan_pci();
+        return platform_driver_register(&cs5535_mfgpt_drv);
 }
 
 module_init(cs5535_mfgpt_init);