lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

MIPS: Alchemy: Stop IRQ name sharing

Browse Source 
Eliminate the sharing of IRQ names among the differenct Alchemy
variants.  IRQ numbers need no longer be hidden behind a
CONFIG_SOC_AU1XXX symbol: step 1 in my quest to make the Alchemy
code less reliant on a hardcoded subtype.

This patch also renames the GPIO irq number constants. It's really
an interrupt line, NOT a GPIO number!

Code which relied on certain irq numbers to have the same name
across all supported cpu subtypes is changed to determine current
cpu subtype at runtime; in some places this isn't possible so
a "compat" symbol is used.

Run-tested on DB1200.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Manuel Lauss
2009-10-07 20:15:15 +02:00
committed by Ralf Baechle
parent 93e9cd8485
commit 788144656b
19 changed files with 743 additions and 665 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
arch/mips/alchemy/common/dma.c
View File

@@ -29,6 +29,8 @@
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
@@ -188,17 +190,14 @@ int request_au1000_dma(int dev_id, const char *dev_str,
dev = &dma_dev_table[dev_id];
if (irqhandler) {
chan->irq = AU1000_DMA_INT_BASE + i;
chan->irq_dev = irq_dev_id;
ret = request_irq(chan->irq, irqhandler, irqflags, dev_str,
chan->irq_dev);
if (ret) {
chan->irq = 0;
chan->irq_dev = NULL;
return ret;
}
} else {
chan->irq = 0;
chan->irq_dev = NULL;
}
@@ -226,13 +225,40 @@ void free_au1000_dma(unsigned int dmanr)
}
disable_dma(dmanr);
if (chan->irq)
if (chan->irq_dev)
free_irq(chan->irq, chan->irq_dev);
chan->irq = 0;
chan->irq_dev = NULL;
chan->dev_id = -1;
}
EXPORT_SYMBOL(free_au1000_dma);
static int __init au1000_dma_init(void)
{
int base, i;
switch (alchemy_get_cputype()) {
case ALCHEMY_CPU_AU1000:
base = AU1000_DMA_INT_BASE;
break;
case ALCHEMY_CPU_AU1500:
base = AU1500_DMA_INT_BASE;
break;
case ALCHEMY_CPU_AU1100:
base = AU1100_DMA_INT_BASE;
break;
default:
goto out;
}
for (i = 0; i < NUM_AU1000_DMA_CHANNELS; i++)
au1000_dma_table[i].irq = base + i;
printk(KERN_INFO "Alchemy DMA initialized\n");
out:
return 0;
}
arch_initcall(au1000_dma_init);
#endif /* AU1000 AU1500 AU1100 */