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authorSebastian Reichel <sre@kernel.org>2016-04-30 16:34:43 +0200
committerSebastian Reichel <sre@kernel.org>2016-06-28 00:38:43 +0200
commitcb70e4c1bc96604953f5792f71ba9ba104705154 (patch)
tree20dee59d8796247c6d5baf64441c6a046f407a55 /drivers/hsi
parentdf26d639e2f4628732a8da5a0f71e4e652ce809b (diff)
HSI: omap_ssi: convert cawake irq handler to thread
Convert cawake interrupt handler from tasklet to threaded interrupt handler in preparation of blocking runtime_pm calls. Signed-off-by: Sebastian Reichel <sre@kernel.org> Tested-by: Pavel Machek <pavel@ucw.cz>
Diffstat (limited to 'drivers/hsi')
-rw-r--r--drivers/hsi/controllers/omap_ssi.h2
-rw-r--r--drivers/hsi/controllers/omap_ssi_core.c4
-rw-r--r--drivers/hsi/controllers/omap_ssi_port.c21
3 files changed, 8 insertions, 19 deletions
diff --git a/drivers/hsi/controllers/omap_ssi.h b/drivers/hsi/controllers/omap_ssi.h
index ba2f92722c09..88a523902a8f 100644
--- a/drivers/hsi/controllers/omap_ssi.h
+++ b/drivers/hsi/controllers/omap_ssi.h
@@ -75,7 +75,6 @@ struct omap_ssm_ctx {
* @wake_irq: IRQ number for incoming wake line (-1 if none)
* @wake_gpio: GPIO number for incoming wake line (-1 if none)
* @pio_tasklet: Bottom half for PIO transfers and events
- * @wake_tasklet: Bottom half for incoming wake events
* @wkin_cken: Keep track of clock references due to the incoming wake line
* @wk_refcount: Reference count for output wake line
* @sys_mpu_enable: Context for the interrupt enable register for irq 0
@@ -99,7 +98,6 @@ struct omap_ssi_port {
int wake_irq;
struct gpio_desc *wake_gpio;
struct tasklet_struct pio_tasklet;
- struct tasklet_struct wake_tasklet;
bool wktest:1; /* FIXME: HACK to be removed */
bool wkin_cken:1; /* Workaround */
unsigned int wk_refcount;
diff --git a/drivers/hsi/controllers/omap_ssi_core.c b/drivers/hsi/controllers/omap_ssi_core.c
index 54943e439488..a463420a0810 100644
--- a/drivers/hsi/controllers/omap_ssi_core.c
+++ b/drivers/hsi/controllers/omap_ssi_core.c
@@ -312,7 +312,7 @@ static int ssi_clk_event(struct notifier_block *nb, unsigned long event,
continue;
/* Workaround for SWBREAK + CAwake down race in CMT */
- tasklet_disable(&omap_port->wake_tasklet);
+ disable_irq(omap_port->wake_irq);
/* stop all ssi communication */
pinctrl_pm_select_idle_state(omap_port->pdev);
@@ -338,7 +338,7 @@ static int ssi_clk_event(struct notifier_block *nb, unsigned long event,
/* resume ssi communication */
pinctrl_pm_select_default_state(omap_port->pdev);
- tasklet_enable(&omap_port->wake_tasklet);
+ enable_irq(omap_port->wake_irq);
}
break;
diff --git a/drivers/hsi/controllers/omap_ssi_port.c b/drivers/hsi/controllers/omap_ssi_port.c
index 38388442e310..9001b06312c3 100644
--- a/drivers/hsi/controllers/omap_ssi_port.c
+++ b/drivers/hsi/controllers/omap_ssi_port.c
@@ -966,7 +966,7 @@ static irqreturn_t ssi_pio_isr(int irq, void *port)
return IRQ_HANDLED;
}
-static void ssi_wake_tasklet(unsigned long ssi_port)
+static irqreturn_t ssi_wake_thread(int irq __maybe_unused, void *ssi_port)
{
struct hsi_port *port = (struct hsi_port *)ssi_port;
struct hsi_controller *ssi = to_hsi_controller(port->device.parent);
@@ -1007,13 +1007,6 @@ static void ssi_wake_tasklet(unsigned long ssi_port)
}
spin_unlock(&omap_port->lock);
}
-}
-
-static irqreturn_t ssi_wake_isr(int irq __maybe_unused, void *ssi_port)
-{
- struct omap_ssi_port *omap_port = hsi_port_drvdata(ssi_port);
-
- tasklet_hi_schedule(&omap_port->wake_tasklet);
return IRQ_HANDLED;
}
@@ -1051,13 +1044,12 @@ static int ssi_wake_irq(struct hsi_port *port, struct platform_device *pd)
}
cawake_irq = gpiod_to_irq(omap_port->wake_gpio);
-
omap_port->wake_irq = cawake_irq;
- tasklet_init(&omap_port->wake_tasklet, ssi_wake_tasklet,
- (unsigned long)port);
- err = devm_request_irq(&port->device, cawake_irq, ssi_wake_isr,
- IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
- "cawake", port);
+
+ err = devm_request_threaded_irq(&port->device, cawake_irq, NULL,
+ ssi_wake_thread,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ "SSI cawake", port);
if (err < 0)
dev_err(&port->device, "Request Wake in IRQ %d failed %d\n",
cawake_irq, err);
@@ -1234,7 +1226,6 @@ static int ssi_port_remove(struct platform_device *pd)
hsi_port_unregister_clients(port);
- tasklet_kill(&omap_port->wake_tasklet);
tasklet_kill(&omap_port->pio_tasklet);
port->async = hsi_dummy_msg;

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