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ptp_qoriq: drop the code of alarm 

The alarm function hadn't been supported by PTP clock driver.
The recommended solution PHC + phc2sys + nanosleep provides
best performance. So drop the code of alarm in ptp_qoriq driver.

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 2020-02-11 12:52:49 +08:00 committed by David S. Miller
parent 2019fc96af
commit d71151a39c
2 changed files with 1 additions and 30 deletions
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29
drivers/ptp/ptp_qoriq.c
View File

@ -131,8 +131,7 @@ irqreturn_t ptp_qoriq_isr(int irq, void *priv)
struct ptp_qoriq *ptp_qoriq = priv;
struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
struct ptp_clock_event event;
u64 ns;
u32 ack = 0, lo, hi, mask, val, irqs;
u32 ack = 0, mask, val, irqs;
spin_lock(&ptp_qoriq->lock);
@ -153,32 +152,6 @@ irqreturn_t ptp_qoriq_isr(int irq, void *priv)
extts_clean_up(ptp_qoriq, 1, true);
}
if (irqs & ALM2) {
ack |= ALM2;
if (ptp_qoriq->alarm_value) {
event.type = PTP_CLOCK_ALARM;
event.index = 0;
event.timestamp = ptp_qoriq->alarm_value;
ptp_clock_event(ptp_qoriq->clock, &event);
}
if (ptp_qoriq->alarm_interval) {
ns = ptp_qoriq->alarm_value + ptp_qoriq->alarm_interval;
hi = ns >> 32;
lo = ns & 0xffffffff;
ptp_qoriq->write(&regs->alarm_regs->tmr_alarm2_l, lo);
ptp_qoriq->write(&regs->alarm_regs->tmr_alarm2_h, hi);
ptp_qoriq->alarm_value = ns;
} else {
spin_lock(&ptp_qoriq->lock);
mask = ptp_qoriq->read(&regs->ctrl_regs->tmr_temask);
mask &= ~ALM2EN;
ptp_qoriq->write(&regs->ctrl_regs->tmr_temask, mask);
spin_unlock(&ptp_qoriq->lock);
ptp_qoriq->alarm_value = 0;
ptp_qoriq->alarm_interval = 0;
}
}
if (irqs & PP1) {
ack |= PP1;
event.type = PTP_CLOCK_PPS;

2
include/linux/fsl/ptp_qoriq.h
View File

@ -149,8 +149,6 @@ struct ptp_qoriq {
bool extts_fifo_support;
int irq;
int phc_index;
u64 alarm_interval; /* for periodic alarm */
u64 alarm_value;
u32 tclk_period; /* nanoseconds */
u32 tmr_prsc;
u32 tmr_add;