x86: OLPC: convert olpc-xo1 driver from pci device to platform device

The cs5535-mfd driver now takes care of the PCI BAR handling; this
means the olpc-xo1 driver shouldn't be touching the PCI device at all.

This patch uses both cs5535-acpi and cs5535-pms platform devices rather
than a single platform device because the cs5535-mfd driver may be used
by other CS5535 platform-specific drivers; OLPC doesn't get to dictate
that ACPI and PMS will always be used together.

Signed-off-by: Andres Salomon <dilinger@queued.net>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 36ed2e2..50aa81f 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2068,7 +2068,7 @@ config OLPC
 
 config OLPC_XO1
        tristate "OLPC XO-1 support"
-       depends on OLPC && PCI
+       depends on OLPC && MFD_CS5535
        ---help---
          Add support for non-essential features of the OLPC XO-1 laptop.
 

diff --git a/arch/x86/platform/olpc/olpc-xo1.c b/arch/x86/platform/olpc/olpc-xo1.c
index f5442c0..1277756 100644 (file)
--- a/arch/x86/platform/olpc/olpc-xo1.c
+++ b/arch/x86/platform/olpc/olpc-xo1.c
@@ -1,6 +1,7 @@
 /*
  * Support for features of the OLPC XO-1 laptop
  *
+ * Copyright (C) 2010 Andres Salomon <dilinger@queued.net>
  * Copyright (C) 2010 One Laptop per Child
  * Copyright (C) 2006 Red Hat, Inc.
  * Copyright (C) 2006 Advanced Micro Devices, Inc.
@@ -12,8 +13,6 @@
  */
 
 #include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/pci_ids.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>
 
@@ -22,9 +21,6 @@
 
 #define DRV_NAME "olpc-xo1"
 
-#define PMS_BAR                4
-#define ACPI_BAR       5
-
 /* PMC registers (PMS block) */
 #define PM_SCLK                0x10
 #define PM_IN_SLPCTL   0x20
@@ -57,65 +53,67 @@ static void xo1_power_off(void)
        outl(0x00002000, acpi_base + PM1_CNT);
 }
 
-/* Read the base addresses from the PCI BAR info */
-static int __devinit setup_bases(struct pci_dev *pdev)
+static int __devinit olpc_xo1_probe(struct platform_device *pdev)
 {
-       int r;
+       struct resource *res;
 
-       r = pci_enable_device_io(pdev);
-       if (r) {
-               dev_err(&pdev->dev, "can't enable device IO\n");
-               return r;
-       }
+       /* don't run on non-XOs */
+       if (!machine_is_olpc())
+               return -ENODEV;
 
-       r = pci_request_region(pdev, ACPI_BAR, DRV_NAME);
-       if (r) {
-               dev_err(&pdev->dev, "can't alloc PCI BAR #%d\n", ACPI_BAR);
-               return r;
+       res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+       if (!res) {
+               dev_err(&pdev->dev, "can't fetch device resource info\n");
+               return -EIO;
        }
 
-       r = pci_request_region(pdev, PMS_BAR, DRV_NAME);
-       if (r) {
-               dev_err(&pdev->dev, "can't alloc PCI BAR #%d\n", PMS_BAR);
-               pci_release_region(pdev, ACPI_BAR);
-               return r;
+       if (!request_region(res->start, resource_size(res), DRV_NAME)) {
+               dev_err(&pdev->dev, "can't request region\n");
+               return -EIO;
        }
 
-       acpi_base = pci_resource_start(pdev, ACPI_BAR);
-       pms_base = pci_resource_start(pdev, PMS_BAR);
+       if (strcmp(pdev->name, "cs5535-pms") == 0)
+               pms_base = res->start;
+       else if (strcmp(pdev->name, "cs5535-acpi") == 0)
+               acpi_base = res->start;
+
+       /* If we have both addresses, we can override the poweroff hook */
+       if (pms_base && acpi_base) {
+               pm_power_off = xo1_power_off;
+               printk(KERN_INFO "OLPC XO-1 support registered\n");
+       }
 
        return 0;
 }
 
-static int __devinit olpc_xo1_probe(struct platform_device *pdev)
+static int __devexit olpc_xo1_remove(struct platform_device *pdev)
 {
-       struct pci_dev *pcidev;
-       int r;
-
-       pcidev = pci_get_device(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA,
-                               NULL);
-       if (!pdev)
-               return -ENODEV;
-
-       r = setup_bases(pcidev);
-       if (r)
-               return r;
+       struct resource *r;
 
-       pm_power_off = xo1_power_off;
+       r = platform_get_resource(pdev, IORESOURCE_IO, 0);
+       release_region(r->start, resource_size(r));
 
-       printk(KERN_INFO "OLPC XO-1 support registered\n");
-       return 0;
-}
+       if (strcmp(pdev->name, "cs5535-pms") == 0)
+               pms_base = 0;
+       else if (strcmp(pdev->name, "cs5535-acpi") == 0)
+               acpi_base = 0;
 
-static int __devexit olpc_xo1_remove(struct platform_device *pdev)
-{
        pm_power_off = NULL;
        return 0;
 }
 
-static struct platform_driver olpc_xo1_driver = {
+static struct platform_driver cs5535_pms_drv = {
+       .driver = {
+               .name = "cs5535-pms",
+               .owner = THIS_MODULE,
+       },
+       .probe = olpc_xo1_probe,
+       .remove = __devexit_p(olpc_xo1_remove),
+};
+
+static struct platform_driver cs5535_acpi_drv = {
        .driver = {
-               .name = DRV_NAME,
+               .name = "cs5535-acpi",
                .owner = THIS_MODULE,
        },
        .probe = olpc_xo1_probe,
@@ -124,12 +122,23 @@ static struct platform_driver olpc_xo1_driver = {
 
 static int __init olpc_xo1_init(void)
 {
-       return platform_driver_register(&olpc_xo1_driver);
+       int r;
+
+       r = platform_driver_register(&cs5535_pms_drv);
+       if (r)
+               return r;
+
+       r = platform_driver_register(&cs5535_acpi_drv);
+       if (r)
+               platform_driver_unregister(&cs5535_pms_drv);
+
+       return r;
 }
 
 static void __exit olpc_xo1_exit(void)
 {
-       platform_driver_unregister(&olpc_xo1_driver);
+       platform_driver_unregister(&cs5535_acpi_drv);
+       platform_driver_unregister(&cs5535_pms_drv);
 }
 
 MODULE_AUTHOR("Daniel Drake <dsd@laptop.org>");