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ptp_qoriq: fix interrupt enabling and handling 

The tmr_tevent register would update event bits
no matter tmr_temask bits were set or not. So we
should get interrupts by tmr_tevent & tmr_temask,
and clean up interrupts in tmr_tevent before
enabling them.

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 2019-01-21 18:41:38 +08:00 committed by David S. Miller
parent ed175d9c6f
commit b0bc10cc88
1 changed files with 32 additions and 32 deletions
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64
drivers/ptp/ptp_qoriq.c
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@ -98,11 +98,18 @@ static irqreturn_t isr(int irq, void *priv)
struct qoriq_ptp_registers *regs = &qoriq_ptp->regs;
struct ptp_clock_event event;
u64 ns;
u32 ack = 0, lo, hi, mask, val;
u32 ack = 0, lo, hi, mask, val, irqs;
spin_lock(&qoriq_ptp->lock);
val = qoriq_read(&regs->ctrl_regs->tmr_tevent);
mask = qoriq_read(&regs->ctrl_regs->tmr_temask);
if (val & ETS1) {
spin_unlock(&qoriq_ptp->lock);
irqs = val & mask;
if (irqs & ETS1) {
ack |= ETS1;
hi = qoriq_read(&regs->etts_regs->tmr_etts1_h);
lo = qoriq_read(&regs->etts_regs->tmr_etts1_l);
@ -113,7 +120,7 @@ static irqreturn_t isr(int irq, void *priv)
ptp_clock_event(qoriq_ptp->clock, &event);
}
if (val & ETS2) {
if (irqs & ETS2) {
ack |= ETS2;
hi = qoriq_read(&regs->etts_regs->tmr_etts2_h);
lo = qoriq_read(&regs->etts_regs->tmr_etts2_l);
@ -124,7 +131,7 @@ static irqreturn_t isr(int irq, void *priv)
ptp_clock_event(qoriq_ptp->clock, &event);
}
if (val & ALM2) {
if (irqs & ALM2) {
ack |= ALM2;
if (qoriq_ptp->alarm_value) {
event.type = PTP_CLOCK_ALARM;
@ -136,13 +143,10 @@ static irqreturn_t isr(int irq, void *priv)
ns = qoriq_ptp->alarm_value + qoriq_ptp->alarm_interval;
hi = ns >> 32;
lo = ns & 0xffffffff;
spin_lock(&qoriq_ptp->lock);
qoriq_write(&regs->alarm_regs->tmr_alarm2_l, lo);
qoriq_write(&regs->alarm_regs->tmr_alarm2_h, hi);
spin_unlock(&qoriq_ptp->lock);
qoriq_ptp->alarm_value = ns;
} else {
qoriq_write(&regs->ctrl_regs->tmr_tevent, ALM2);
spin_lock(&qoriq_ptp->lock);
mask = qoriq_read(&regs->ctrl_regs->tmr_temask);
mask &= ~ALM2EN;
@ -153,7 +157,7 @@ static irqreturn_t isr(int irq, void *priv)
}
}
if (val & PP1) {
if (irqs & PP1) {
ack |= PP1;
event.type = PTP_CLOCK_PPS;
ptp_clock_event(qoriq_ptp->clock, &event);
@ -260,7 +264,7 @@ static int ptp_qoriq_enable(struct ptp_clock_info *ptp,
struct qoriq_ptp *qoriq_ptp = container_of(ptp, struct qoriq_ptp, caps);
struct qoriq_ptp_registers *regs = &qoriq_ptp->regs;
unsigned long flags;
u32 bit, mask;
u32 bit, mask = 0;
switch (rq->type) {
case PTP_CLK_REQ_EXTTS:
@ -274,32 +278,28 @@ static int ptp_qoriq_enable(struct ptp_clock_info *ptp,
default:
return -EINVAL;
}
spin_lock_irqsave(&qoriq_ptp->lock, flags);
mask = qoriq_read(&regs->ctrl_regs->tmr_temask);
if (on)
mask |= bit;
else
mask &= ~bit;
qoriq_write(&regs->ctrl_regs->tmr_temask, mask);
spin_unlock_irqrestore(&qoriq_ptp->lock, flags);
return 0;
case PTP_CLK_REQ_PPS:
spin_lock_irqsave(&qoriq_ptp->lock, flags);
mask = qoriq_read(&regs->ctrl_regs->tmr_temask);
if (on)
mask |= PP1EN;
else
mask &= ~PP1EN;
qoriq_write(&regs->ctrl_regs->tmr_temask, mask);
spin_unlock_irqrestore(&qoriq_ptp->lock, flags);
return 0;
default:
break;
case PTP_CLK_REQ_PPS:
bit = PP1EN;
break;
default:
return -EOPNOTSUPP;
}
return -EOPNOTSUPP;
spin_lock_irqsave(&qoriq_ptp->lock, flags);
mask = qoriq_read(&regs->ctrl_regs->tmr_temask);
if (on) {
mask |= bit;
qoriq_write(&regs->ctrl_regs->tmr_tevent, bit);
} else {
mask &= ~bit;
}
qoriq_write(&regs->ctrl_regs->tmr_temask, mask);
spin_unlock_irqrestore(&qoriq_ptp->lock, flags);
return 0;
}
static const struct ptp_clock_info ptp_qoriq_caps = {