diff options
Diffstat (limited to 'drivers/tty/serial/mfd.c')
| -rw-r--r-- | drivers/tty/serial/mfd.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/tty/serial/mfd.c b/drivers/tty/serial/mfd.c index cab52f4a88b0..cfa750163672 100644 --- a/drivers/tty/serial/mfd.c +++ b/drivers/tty/serial/mfd.c @@ -38,6 +38,7 @@ #include <linux/pci.h> #include <linux/io.h> #include <linux/debugfs.h> +#include <linux/pm_runtime.h> #define HSU_DMA_BUF_SIZE 2048 @@ -764,6 +765,8 @@ static int serial_hsu_startup(struct uart_port *port) container_of(port, struct uart_hsu_port, port); unsigned long flags; + pm_runtime_get_sync(up->dev); + /* * Clear the FIFO buffers and disable them. * (they will be reenabled in set_termios()) @@ -871,6 +874,8 @@ static void serial_hsu_shutdown(struct uart_port *port) UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); serial_out(up, UART_FCR, 0); + + pm_runtime_put(up->dev); } static void @@ -1249,6 +1254,39 @@ static int serial_hsu_resume(struct pci_dev *pdev) #define serial_hsu_resume NULL #endif +#ifdef CONFIG_PM_RUNTIME +static int serial_hsu_runtime_idle(struct device *dev) +{ + int err; + + err = pm_schedule_suspend(dev, 500); + if (err) + return -EBUSY; + + return 0; +} + +static int serial_hsu_runtime_suspend(struct device *dev) +{ + return 0; +} + +static int serial_hsu_runtime_resume(struct device *dev) +{ + return 0; +} +#else +#define serial_hsu_runtime_idle NULL +#define serial_hsu_runtime_suspend NULL +#define serial_hsu_runtime_resume NULL +#endif + +static const struct dev_pm_ops serial_hsu_pm_ops = { + .runtime_suspend = serial_hsu_runtime_suspend, + .runtime_resume = serial_hsu_runtime_resume, + .runtime_idle = serial_hsu_runtime_idle, +}; + /* temp global pointer before we settle down on using one or four PCI dev */ static struct hsu_port *phsu; @@ -1315,6 +1353,9 @@ static int serial_hsu_probe(struct pci_dev *pdev, pci_set_drvdata(pdev, uport); } + pm_runtime_put_noidle(&pdev->dev); + pm_runtime_allow(&pdev->dev); + return 0; err_disable: @@ -1411,6 +1452,9 @@ static void serial_hsu_remove(struct pci_dev *pdev) if (!priv) return; + pm_runtime_forbid(&pdev->dev); + pm_runtime_get_noresume(&pdev->dev); + /* For port 0/1/2, priv is the address of uart_hsu_port */ if (pdev->device != 0x081E) { up = priv; @@ -1438,6 +1482,9 @@ static struct pci_driver hsu_pci_driver = { .remove = __devexit_p(serial_hsu_remove), .suspend = serial_hsu_suspend, .resume = serial_hsu_resume, + .driver = { + .pm = &serial_hsu_pm_ops, + }, }; static int __init hsu_pci_init(void) |
