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Subject[PATCH 3/4] serial: omap: Switch wake-up interrupt to generic wakeirq
Date
We can now use generic wakeirq handling and remove the custom handling
for the wake-up interrupts.

Signed-off-by: Tony Lindgren <tony@atomide.com>
---
drivers/tty/serial/omap-serial.c | 38 ++++++++++++++------------------------
1 file changed, 14 insertions(+), 24 deletions(-)

diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 10256fa..1e82365 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -38,6 +38,7 @@
#include <linux/serial_core.h>
#include <linux/irq.h>
#include <linux/pm_runtime.h>
+#include <linux/pm_wakeirq.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/gpio.h>
@@ -135,6 +136,7 @@ struct uart_omap_port {
struct uart_port port;
struct uart_omap_dma uart_dma;
struct device *dev;
+ struct wakeirq_source *wirq;
int wakeirq;

unsigned char ier;
@@ -160,7 +162,6 @@ struct uart_omap_port {
unsigned long port_activity;
int context_loss_cnt;
u32 errata;
- u8 wakeups_enabled;
u32 features;

int rts_gpio;
@@ -209,28 +210,11 @@ static int serial_omap_get_context_loss_count(struct uart_omap_port *up)
return pdata->get_context_loss_count(up->dev);
}

-static inline void serial_omap_enable_wakeirq(struct uart_omap_port *up,
- bool enable)
-{
- if (!up->wakeirq)
- return;
-
- if (enable)
- enable_irq(up->wakeirq);
- else
- disable_irq_nosync(up->wakeirq);
-}
-
+/* REVISIT: Remove this when omap3 boots in device tree only mode */
static void serial_omap_enable_wakeup(struct uart_omap_port *up, bool enable)
{
struct omap_uart_port_info *pdata = dev_get_platdata(up->dev);

- if (enable == up->wakeups_enabled)
- return;
-
- serial_omap_enable_wakeirq(up, enable);
- up->wakeups_enabled = enable;
-
if (!pdata || !pdata->enable_wakeup)
return;

@@ -750,13 +734,16 @@ static int serial_omap_startup(struct uart_port *port)

/* Optional wake-up IRQ */
if (up->wakeirq) {
- retval = request_irq(up->wakeirq, serial_omap_irq,
- up->port.irqflags, up->name, up);
+ up->wirq = devm_kzalloc(up->dev, sizeof(*up->wirq),
+ GFP_KERNEL);
+ if (!up->wirq)
+ return -ENOMEM;
+ retval = dev_pm_wakeirq_request(up->dev, up->wakeirq,
+ NULL, 0, NULL, up->wirq);
if (retval) {
free_irq(up->port.irq, up);
return retval;
}
- disable_irq(up->wakeirq);
}

dev_dbg(up->port.dev, "serial_omap_startup+%d\n", up->port.line);
@@ -845,8 +832,7 @@ static void serial_omap_shutdown(struct uart_port *port)
pm_runtime_mark_last_busy(up->dev);
pm_runtime_put_autosuspend(up->dev);
free_irq(up->port.irq, up);
- if (up->wakeirq)
- free_irq(up->wakeirq, up);
+ dev_pm_wakeirq_free(up->wirq);
}

static void serial_omap_uart_qos_work(struct work_struct *work)
@@ -1479,6 +1465,8 @@ static int serial_omap_suspend(struct device *dev)
else
serial_omap_enable_wakeup(up, false);

+ dev_pm_wakeirq_arm_for_suspend(up->wirq);
+
return 0;
}

@@ -1838,6 +1826,7 @@ static int serial_omap_runtime_suspend(struct device *dev)
up->context_loss_cnt = serial_omap_get_context_loss_count(up);

serial_omap_enable_wakeup(up, true);
+ dev_pm_wakeirq_enable(up->wirq);

up->latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE;
schedule_work(&up->qos_work);
@@ -1852,6 +1841,7 @@ static int serial_omap_runtime_resume(struct device *dev)
int loss_cnt = serial_omap_get_context_loss_count(up);

serial_omap_enable_wakeup(up, false);
+ dev_pm_wakeirq_disable(up->wirq);

if (loss_cnt < 0) {
dev_dbg(dev, "serial_omap_get_context_loss_count failed : %d\n",
--
2.1.4


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