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Commit 74c05a33 authored by Yangbo Lu's avatar Yangbo Lu Committed by David S. Miller
Browse files

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: 91305f28 ("ptp_qoriq: support automatic configuration for ptp timer")
Signed-off-by: default avatarYangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9dae3497

drivers/ptp/ptp_qoriq.c

+4 −2
Original line number Diff line number Diff line
@@ -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;