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| author | Nicolas Pitre <nicolas.pitre@linaro.org> | 2011-04-14 22:54:21 -0400 |
|---|---|---|
| committer | Nicolas Pitre <nicolas.pitre@linaro.org> | 2011-04-14 22:54:21 -0400 |
| commit | 3ec10cd8b526c6b10170c2649002672ee2019e73 (patch) | |
| tree | 27e3fb26020877ae43d3bcc5996c058957df3dc3 /drivers/watchdog/sp5100_tco.c | |
| parent | 993916203f00e8c62599466a5caa866e09f0fae3 (diff) | |
| parent | 1be99f6c95e6c887756f789a60d15771235acd0c (diff) | |
Merge commit 'v2.6.38.3' into linaro-2.6.38
Diffstat (limited to 'drivers/watchdog/sp5100_tco.c')
| -rw-r--r-- | drivers/watchdog/sp5100_tco.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/watchdog/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c index 808372883e8..c7ea4bedfe6 100644 --- a/drivers/watchdog/sp5100_tco.c +++ b/drivers/watchdog/sp5100_tco.c @@ -42,6 +42,7 @@ #define PFX TCO_MODULE_NAME ": " /* internal variables */ +static u32 tcobase_phys; static void __iomem *tcobase; static unsigned int pm_iobase; static DEFINE_SPINLOCK(tco_lock); /* Guards the hardware */ @@ -305,10 +306,18 @@ static unsigned char __devinit sp5100_tco_setupdevice(void) /* Low three bits of BASE0 are reserved. */ val = val << 8 | (inb(SP5100_IO_PM_DATA_REG) & 0xf8); + if (!request_mem_region_exclusive(val, SP5100_WDT_MEM_MAP_SIZE, + "SP5100 TCO")) { + printk(KERN_ERR PFX "mmio address 0x%04x already in use\n", + val); + goto unreg_region; + } + tcobase_phys = val; + tcobase = ioremap(val, SP5100_WDT_MEM_MAP_SIZE); if (tcobase == 0) { printk(KERN_ERR PFX "failed to get tcobase address\n"); - goto unreg_region; + goto unreg_mem_region; } /* Enable watchdog decode bit */ @@ -346,7 +355,8 @@ static unsigned char __devinit sp5100_tco_setupdevice(void) /* Done */ return 1; - iounmap(tcobase); +unreg_mem_region: + release_mem_region(tcobase_phys, SP5100_WDT_MEM_MAP_SIZE); unreg_region: release_region(pm_iobase, SP5100_PM_IOPORTS_SIZE); exit: @@ -401,6 +411,7 @@ static int __devinit sp5100_tco_init(struct platform_device *dev) exit: iounmap(tcobase); + release_mem_region(tcobase_phys, SP5100_WDT_MEM_MAP_SIZE); release_region(pm_iobase, SP5100_PM_IOPORTS_SIZE); return ret; } @@ -414,6 +425,7 @@ static void __devexit sp5100_tco_cleanup(void) /* Deregister */ misc_deregister(&sp5100_tco_miscdev); iounmap(tcobase); + release_mem_region(tcobase_phys, SP5100_WDT_MEM_MAP_SIZE); release_region(pm_iobase, SP5100_PM_IOPORTS_SIZE); } |