[PATCH v4 10/16] rtc: m68k: provide ioctl for q40
From: Arnd Bergmann <hidden>
Date: 2016-05-30 18:58:31
Also in:
linux-arch, linux-rtc, linux-sh, linuxppc-dev, lkml
Subsystem:
m68k architecture, the rest · Maintainers:
Geert Uytterhoeven, Linus Torvalds
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 <redacted> --- arch/m68k/kernel/time.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)
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, };
--
2.7.0
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