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authorArnd Bergmann <arnd@arndb.de>2016-05-30 21:57:58 +0300
committerAlexandre Belloni <alexandre.belloni@free-electrons.com>2016-06-04 01:23:22 +0300
commit598e8a1fb5e123894686cce5500775c2ae8b57fc (patch)
tree7c104de9d18bf4dcae16858ee4f662506ab3d26f /arch/m68k
parent923c904c33023b168baad724d12c7e5260660210 (diff)
downloadlinux-598e8a1fb5e123894686cce5500775c2ae8b57fc.tar.xz
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>
Diffstat (limited to 'arch/m68k')
-rw-r--r--arch/m68k/kernel/time.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/m68k/kernel/time.c b/arch/m68k/kernel/time.c
index bd6417d38d5a..4e5aa2f4f522 100644
--- a/arch/m68k/kernel/time.c
+++ b/arch/m68k/kernel/time.c
@@ -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,
};