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rtc-m48t59: allow externally mapped ioaddr 

Add support for externally mapped ioaddr.  This is required on sparc32
as the ioaddr must be mapped with of_ioremap().

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Krzysztof Helt 2008-09-03 15:41:57 -07:00 committed by David S. Miller
parent 94fe7424a4
commit 64151ad5b3
2 changed files with 12 additions and 4 deletions
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14
drivers/rtc/rtc-m48t59.c
View File

@ -411,9 +411,14 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev)
if (!m48t59)
return -ENOMEM;
m48t59->ioaddr = ioremap(res->start, res->end - res->start + 1);
if (!m48t59->ioaddr)
goto out;
m48t59->ioaddr = pdata->ioaddr;
if (!m48t59->ioaddr) {
/* ioaddr not mapped externally */
m48t59->ioaddr = ioremap(res->start, res->end - res->start + 1);
if (!m48t59->ioaddr)
goto out;
}
/* Try to get irq number. We also can work in
* the mode without IRQ.
@ -481,11 +486,12 @@ out:
static int __devexit m48t59_rtc_remove(struct platform_device *pdev)
{
struct m48t59_private *m48t59 = platform_get_drvdata(pdev);
struct m48t59_plat_data *pdata = pdev->dev.platform_data;
sysfs_remove_bin_file(&pdev->dev.kobj, &m48t59_nvram_attr);
if (!IS_ERR(m48t59->rtc))
rtc_device_unregister(m48t59->rtc);
if (m48t59->ioaddr)
if (m48t59->ioaddr && !pdata->ioaddr)
iounmap(m48t59->ioaddr);
if (m48t59->irq != NO_IRQ)
free_irq(m48t59->irq, &pdev->dev);

2
include/linux/rtc/m48t59.h
View File

@ -55,6 +55,8 @@ struct m48t59_plat_data {
int type; /* RTC model */
/* ioaddr mapped externally */
void __iomem *ioaddr;
/* offset to RTC registers, automatically set according to the type */
unsigned int offset;
};