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Subject[PATCH] ptp_qoriq: use div_u64/div_u64_rem for 64-bit division
Date
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: 91305f281262 ("ptp_qoriq: support automatic configuration for ptp timer")
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
---
drivers/ptp/ptp_qoriq.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/ptp/ptp_qoriq.c b/drivers/ptp/ptp_qoriq.c
index 095c185..fdd49c2 100644
--- a/drivers/ptp/ptp_qoriq.c
+++ b/drivers/ptp/ptp_qoriq.c
@@ -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;
--
1.7.1
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