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ptp_qoriq: use div_u64/div_u64_rem for 64-bit division 

This is a fix-up patch for below build issue with multi_v7_defconfig.

drivers/ptp/ptp_qoriq.o: In function `qoriq_ptp_probe':
ptp_qoriq.c:(.text+0xd0c): undefined reference to `__aeabi_uldivmod'

Fixes: 91305f2812 ("ptp_qoriq: support automatic configuration for ptp timer")
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yangbo Lu 2018-08-06 12:39:11 +08:00 committed by David S. Miller
parent 9dae34978d
commit 74c05a33cb
1 changed files with 4 additions and 2 deletions
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6
drivers/ptp/ptp_qoriq.c
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@ -373,6 +373,7 @@ static int qoriq_ptp_auto_config(struct qoriq_ptp *qoriq_ptp,
u64 freq_comp;
u64 max_adj;
u32 nominal_freq;
u32 remainder = 0;
u32 clk_src = 0;
qoriq_ptp->cksel = DEFAULT_CKSEL;
@ -400,7 +401,8 @@ static int qoriq_ptp_auto_config(struct qoriq_ptp *qoriq_ptp,
* freq_ratio = reference_clock_freq / nominal_freq
*/
freq_comp = ((u64)1 << 32) * nominal_freq;
if (do_div(freq_comp, clk_src))
freq_comp = div_u64_rem(freq_comp, clk_src, &remainder);
if (remainder)
freq_comp++;
qoriq_ptp->tmr_add = freq_comp;
@ -411,7 +413,7 @@ static int qoriq_ptp_auto_config(struct qoriq_ptp *qoriq_ptp,
* freq_ratio = reference_clock_freq / nominal_freq
*/
max_adj = 1000000000ULL * (clk_src - nominal_freq);
max_adj = max_adj / nominal_freq - 1;
max_adj = div_u64(max_adj, nominal_freq) - 1;
qoriq_ptp->caps.max_adj = max_adj;
return 0;