linux-kernel - [PATCH 9/12] opti621: add "pci

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Date:	Thu, 13 Mar 2008 23:44:46 +0100
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	linux-ide@...r.kernel.org
Cc:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 9/12] opti621: add "pci_clock=" parameter

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

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
 drivers/ide/pci/opti621.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

Index: b/drivers/ide/pci/opti621.c
===================================================================
--- a/drivers/ide/pci/opti621.c
+++ b/drivers/ide/pci/opti621.c
@@ -123,6 +123,8 @@
 
 static int reg_base;
 
+static int pci_clock;
+
 #define PIO_NOT_EXIST 254
 #define PIO_DONT_KNOW 255
 
@@ -210,7 +212,7 @@ static void compute_clocks(int pio, pio_
 {
 	if (pio != PIO_NOT_EXIST) {
 		int adr_setup, data_pls;
-		int bus_speed = system_bus_clock();
+		int bus_speed = pci_clock ? pci_clock : system_bus_clock();
 
 		adr_setup = ide_pio_timings[pio].setup_time;
 		data_pls = ide_pio_timings[pio].active_time;
@@ -376,6 +378,9 @@ static int __init opti621_ide_init(void)
 
 module_init(opti621_ide_init);
 
+module_param(pci_clock, int, 0);
+MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
+
 MODULE_AUTHOR("Jaromir Koutek, Jan Harkes, Mark Lord");
 MODULE_DESCRIPTION("PCI driver module for Opti621 IDE");
 MODULE_LICENSE("GPL");
--
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