rtc: m68k: provide ioctl for q40

The q40 platform is the only machine in the kernel that provides
RTC_PLL_GET/RTC_PLL_SET ioctl commands in its rtc through the
mach_get_rtc_pll/mach_set_rtc_pll callbacks.

However, this currenctly works only in the old-style genrtc
driver, not the (somewhat) modern rtc-generic driver replacing
it. This adds an ioctl implementation to the m68k generic_rtc_ops
in order to let both drivers provide the same API.

After this, we should be able to remove support for genrtc
from the m68k architecture.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Arnd Bergmann 2016-05-30 20:57:58 +02:00 committed by Alexandre Belloni
parent 923c904c33
commit 598e8a1fb5

View File

@ -100,7 +100,32 @@ static int rtc_generic_set_time(struct device *dev, struct rtc_time *tm)
return 0;
}
static int rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
{
struct rtc_pll_info pll;
struct rtc_pll_info __user *argp = (void __user *)arg;
switch (cmd) {
case RTC_PLL_GET:
if (!mach_get_rtc_pll || mach_get_rtc_pll(&pll))
return -EINVAL;
return copy_to_user(argp, &pll, sizeof pll) ? -EFAULT : 0;
case RTC_PLL_SET:
if (!mach_set_rtc_pll)
return -EINVAL;
if (!capable(CAP_SYS_TIME))
return -EACCES;
if (copy_from_user(&pll, argp, sizeof(pll)))
return -EFAULT;
return mach_set_rtc_pll(&pll);
}
return -ENOIOCTLCMD;
}
static const struct rtc_class_ops generic_rtc_ops = {
.ioctl = rtc_ioctl,
.read_time = rtc_generic_get_time,
.set_time = rtc_generic_set_time,
};