@@ -59,6 +59,11 @@
#include <linux/sizes.h>
#include <linux/io.h>
#include <linux/acpi.h>
+#include <linux/suspend.h>
+#include <linux/pm_wakeirq.h>
+#include <linux/irq.h>
+
+static struct device *uart_dev;
#define UART_NR 14
@@ -2353,11 +2358,29 @@ static int pl011_register_port(struct uart_amba_port *uap)
return ret;
}
+struct uart_match {
+ struct uart_port *port;
+ struct uart_driver *driver;
+};
+
+static int match_uart_port(struct device *dev, void *data)
+{
+ struct uart_match *match = data;
+
+ dev_t devt = MKDEV(match->driver->major, match->driver->minor) +
+ match->port->line;
+
+ pr_info("the match data of ttyAMA0 is %d %d\n",
+ (int)devt, (int)dev->devt);
+
+ return dev->devt == devt; /* Actually, only one tty per port */
+}
static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
{
struct uart_amba_port *uap;
struct vendor_data *vendor = id->data;
int portnr, ret;
+ struct uart_match match;
portnr = pl011_find_free_port();
if (portnr < 0)
@@ -2387,13 +2410,35 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
amba_set_drvdata(dev, uap);
- return pl011_register_port(uap);
+ ret = pl011_register_port(uap);
+
+ if (!of_find_property(dev->dev.of_node, "linux,wakeup", NULL)) {
+ uart_dev = NULL;
+ return ret;
+ }
+
+ match.port = &uap->port;
+ match.driver = &amba_reg;
+
+ uart_dev = device_find_child(&dev->dev, &match, match_uart_port);
+
+ if (uart_dev) {
+ device_init_wakeup(uart_dev, true);
+ dev_pm_set_wake_irq(uart_dev, uap->port.irq);
+ }
+
+ return ret;
}
static int pl011_remove(struct amba_device *dev)
{
struct uart_amba_port *uap = amba_get_drvdata(dev);
+ if (uart_dev) {
+ dev_pm_clear_wake_irq(uart_dev);
+ device_init_wakeup(uart_dev, false);
+ }
+
uart_remove_one_port(&amba_reg, &uap->port);
pl011_unregister_port(uap);
return 0;
the commit use the latest dev_pm_set_wake_irq API instead of the enable_irq_wake and IRQF_NO_SUSPEND to configure the ttyAMA device to work as the wakeup source Signed-off-by: Zhaoyang Huang <zhaoyang.huang@linaro.org> --- drivers/tty/serial/amba-pl011.c | 47 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 46 insertions(+), 1 deletion(-)