[PATCH 4/12] aec62xx: add "pci_clock=" parameter

[Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>]

Add "pci_clock=" parameter for specifying PCI bus clock frequency (in MHz).

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/pci/aec62xx.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

Index: b/drivers/ide/pci/aec62xx.c
===================================================================
--- a/drivers/ide/pci/aec62xx.c
+++ b/drivers/ide/pci/aec62xx.c
@@ -13,6 +13,8 @@
 
 #include <asm/io.h>
 
+static int pci_clock;
+
 struct chipset_bus_clock_list_entry {
 	u8 xfer_speed;
 	u8 chipset_settings;
@@ -140,7 +142,7 @@ static void aec_set_pio_mode(ide_drive_t
 
 static unsigned int __devinit init_chipset_aec62xx(struct pci_dev *dev, const char *name)
 {
-	int bus_speed = system_bus_clock();
+	int bus_speed = pci_clock ? pci_clock : system_bus_clock();
 
 	if (bus_speed <= 33)
 		pci_set_drvdata(dev, (void *) aec6xxx_33_base);
@@ -308,6 +310,9 @@ static int __init aec62xx_ide_init(void)
 
 module_init(aec62xx_ide_init);
 
+module_param(pci_clock, int, 0);
+MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
+
 MODULE_AUTHOR("Andre Hedrick");
 MODULE_DESCRIPTION("PCI driver module for ARTOP AEC62xx IDE");
 MODULE_LICENSE("GPL");