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 <[email protected]> --- drivers/tty/serial/amba-pl011.c | 47 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 46 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index fd27e98..1923b94 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -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; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
