aboutsummaryrefslogtreecommitdiff
path: root/drivers/ptp/ptp_qoriq.c
diff options
context:
space:
mode:
authorYangbo Lu <yangbo.lu@nxp.com>2019-01-21 18:41:38 +0800
committerDavid S. Miller <davem@davemloft.net>2019-01-22 20:21:57 -0800
commitb0bc10cc8887214c997bfe4f47217b04db4733a2 (patch)
treed9265916dd5e46293bd5fdfc32f85f183e956123 /drivers/ptp/ptp_qoriq.c
parented175d9c6f0d4df0f83f22ff4c887c21b7d021cd (diff)
downloadlinux-b0bc10cc8887214c997bfe4f47217b04db4733a2.tar.gz
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>
Diffstat (limited to 'drivers/ptp/ptp_qoriq.c')
-rw-r--r--drivers/ptp/ptp_qoriq.c62
1 files changed, 31 insertions, 31 deletions
diff --git a/drivers/ptp/ptp_qoriq.c b/drivers/ptp/ptp_qoriq.c
index fdd49c26bbcc..274321471d50 100644
--- a/drivers/ptp/ptp_qoriq.c
+++ b/drivers/ptp/ptp_qoriq.c
@@ -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);
+
+ spin_unlock(&qoriq_ptp->lock);
+
+ irqs = val & mask;
- if (val & ETS1) {
+ 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;
-
+ break;
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:
+ 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 = {