summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--drivers/tty/serial/omap-serial.c54
1 files changed, 46 insertions, 8 deletions
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index c715778a745c..b69393f2817d 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -39,6 +39,7 @@
#include <linux/irq.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
+#include <linux/of_irq.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/platform_data/serial-omap.h>
@@ -134,6 +135,7 @@ struct uart_omap_port {
struct uart_port port;
struct uart_omap_dma uart_dma;
struct device *dev;
+ int wakeirq;
unsigned char ier;
unsigned char lcr;
@@ -214,10 +216,23 @@ 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(up->wakeirq);
+}
+
static void serial_omap_enable_wakeup(struct uart_omap_port *up, bool enable)
{
struct omap_uart_port_info *pdata = dev_get_platdata(up->dev);
+ serial_omap_enable_wakeirq(up, enable);
if (!pdata || !pdata->enable_wakeup)
return;
@@ -699,6 +714,20 @@ static int serial_omap_startup(struct uart_port *port)
if (retval)
return retval;
+ /* Optional wake-up IRQ */
+ if (up->wakeirq) {
+ retval = request_irq(up->wakeirq, serial_omap_irq,
+ up->port.irqflags, up->name, up);
+ if (retval) {
+ free_irq(up->port.irq, up);
+ return retval;
+ }
+ disable_irq(up->wakeirq);
+ } else {
+ dev_info(up->port.dev, "no wakeirq for uart%d\n",
+ up->port.line);
+ }
+
dev_dbg(up->port.dev, "serial_omap_startup+%d\n", up->port.line);
pm_runtime_get_sync(up->dev);
@@ -787,6 +816,8 @@ 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);
}
static void serial_omap_uart_qos_work(struct work_struct *work)
@@ -1572,11 +1603,23 @@ static int serial_omap_probe(struct platform_device *pdev)
struct uart_omap_port *up;
struct resource *mem, *irq;
struct omap_uart_port_info *omap_up_info = dev_get_platdata(&pdev->dev);
- int ret;
+ int ret, uartirq = 0, wakeirq = 0;
+ /* The optional wakeirq may be specified in the board dts file */
if (pdev->dev.of_node) {
+ uartirq = irq_of_parse_and_map(pdev->dev.of_node, 0);
+ if (!uartirq)
+ return -EPROBE_DEFER;
+ wakeirq = irq_of_parse_and_map(pdev->dev.of_node, 1);
omap_up_info = of_get_uart_port_info(&pdev->dev);
pdev->dev.platform_data = omap_up_info;
+ } else {
+ irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!irq) {
+ dev_err(&pdev->dev, "no irq resource?\n");
+ return -ENODEV;
+ }
+ uartirq = irq->start;
}
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -1585,12 +1628,6 @@ static int serial_omap_probe(struct platform_device *pdev)
return -ENODEV;
}
- irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!irq) {
- dev_err(&pdev->dev, "no irq resource?\n");
- return -ENODEV;
- }
-
if (!devm_request_mem_region(&pdev->dev, mem->start, resource_size(mem),
pdev->dev.driver->name)) {
dev_err(&pdev->dev, "memory region already claimed\n");
@@ -1624,7 +1661,8 @@ static int serial_omap_probe(struct platform_device *pdev)
up->port.dev = &pdev->dev;
up->port.type = PORT_OMAP;
up->port.iotype = UPIO_MEM;
- up->port.irq = irq->start;
+ up->port.irq = uartirq;
+ up->wakeirq = wakeirq;
up->port.regshift = 2;
up->port.fifosize = 64;
OpenPOWER on IntegriCloud