[patch 3/4] SM501: GPIO dynamic registration for PCI devices

[Ben Dooks]

From: Arnaud Patard <apatard@xxxxxxxxxxxx>

The SM501 PCI card requires a dyanmic gpio allocation as
the number of cards is not known at compile time. Fixup
the platform data and registration to deal with this.

Acked-by: Ben Dooks <ben-linux@xxxxxxxxx>
Signed-off-by: Arnaud Patard <apatard@xxxxxxxxxxxx>

Index: linux-2.6.26-rc6-quilt3/drivers/mfd/sm501.c
===================================================================
--- linux-2.6.26-rc6-quilt3.orig/drivers/mfd/sm501.c	2008-06-20 16:34:02.000000000 +0100
+++ linux-2.6.26-rc6-quilt3/drivers/mfd/sm501.c	2008-06-20 16:35:11.000000000 +0100
@@ -996,12 +996,13 @@ static int __devinit sm501_gpio_register
 {
 	struct sm501_platdata *pdata = sm->platdata;
 	struct gpio_chip *gchip = &chip->gpio;
-	unsigned base = pdata->gpio_base;
+	int base = pdata->gpio_base;
 
 	memcpy(chip, &gpio_chip_template, sizeof(struct gpio_chip));
 
 	if (chip == &gpio->high) {
-		base += 32;
+		if (base > 0)
+			base += 32;
 		chip->regbase = gpio->regs + SM501_GPIO_DATA_HIGH;
 		gchip->label  = "SM501-HIGH";
 	} else {
@@ -1452,6 +1453,7 @@ static struct sm501_platdata_fb sm501_fb
 static struct sm501_platdata sm501_pci_platdata = {
 	.init		= &sm501_pci_initdata,
 	.fb		= &sm501_fb_pdata,
+	.gpio_base	= -1,
 };
 
 static int sm501_pci_probe(struct pci_dev *dev,
Index: linux-2.6.26-rc6-quilt3/include/linux/sm501.h
===================================================================
--- linux-2.6.26-rc6-quilt3.orig/include/linux/sm501.h	2008-06-20 16:34:02.000000000 +0100
+++ linux-2.6.26-rc6-quilt3/include/linux/sm501.h	2008-06-20 16:35:11.000000000 +0100
@@ -156,7 +156,7 @@ struct sm501_platdata {
 	struct sm501_platdata_fb	*fb;
 
 	int				 flags;
-	unsigned			 gpio_base;
+	int				 gpio_base;
 
 	int	(*get_power)(struct device *dev);
 	int	(*set_power)(struct device *dev, unsigned int on);

-- 
Ben (ben@xxxxxxxxx, http://www.fluff.org/)

  'a smiley only costs 4 bytes'
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