From: Quanyang Wang <quanyang.w...@windriver.com>
64-bit division "(u64 A) / (u32 B)" will break linking on ARCH arm:
rm-linux-gnueabihf-ld: drivers/rtc/rtc-zynqmp.o: in function
`xlnx_rtc_read_offset':
rtc-zynqmp.c:(.text+0x48): undefined reference to `__aeabi_ldivmod'
Fix this by using do_div.
Signed-off-by: Quanyang Wang <quanyang.w...@windriver.com>
---
drivers/rtc/rtc-zynqmp.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/rtc/rtc-zynqmp.c b/drivers/rtc/rtc-zynqmp.c
index 0f0edbeec7cf9..6412179f5b223 100644
--- a/drivers/rtc/rtc-zynqmp.c
+++ b/drivers/rtc/rtc-zynqmp.c
@@ -193,9 +193,10 @@ static void xlnx_init_rtc(struct xlnx_rtc_dev *xrtcdev)
static int xlnx_rtc_read_offset(struct device *dev, long *offset)
{
struct xlnx_rtc_dev *xrtcdev = dev_get_drvdata(dev);
+ unsigned long long rtc_ppb = RTC_PPB;
long offset_val;
unsigned int reg;
- unsigned int tick_mult = RTC_PPB / xrtcdev->calibval;
+ unsigned int tick_mult = do_div(rtc_ppb, xrtcdev->calibval);
reg = readl(xrtcdev->reg_base + RTC_CALIB_RD);
@@ -216,11 +217,12 @@ static int xlnx_rtc_read_offset(struct device *dev, long
*offset)
static int xlnx_rtc_set_offset(struct device *dev, long offset)
{
struct xlnx_rtc_dev *xrtcdev = dev_get_drvdata(dev);
+ unsigned long long rtc_ppb = RTC_PPB;
short int max_tick;
unsigned char fract_tick = 0;
unsigned int calibval;
int fract_offset;
- unsigned int tick_mult = RTC_PPB / xrtcdev->calibval;
+ unsigned int tick_mult = do_div(rtc_ppb, xrtcdev->calibval);
/* Make sure offset value is within supported range */
if (offset < RTC_OFFSET_MIN || offset > RTC_OFFSET_MAX)
--
2.25.1
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