| Message ID | 1441100149-28071-1-git-send-email-zhaoyang.huang@linaro.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
Hi Zhaoyang, added Sudeep in Cc. You should run checkpatch.pl on this patch. There are 11 errors and 3 warnings. On 09/01/2015 11:35 AM, Zhaoyang Huang wrote: > 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 | 55 ++++++++++++++++++++++++++++++++++++--- > 1 file changed, 52 insertions(+), 3 deletions(-) > > diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c > index 50cf5b1..33a479a 100644 > --- a/drivers/tty/serial/amba-pl011.c > +++ b/drivers/tty/serial/amba-pl011.c > @@ -59,6 +59,10 @@ > #include <linux/sizes.h> > #include <linux/io.h> > #include <linux/acpi.h> > +#include <linux/suspend.h> > +#include <linux/pm_wakeirq.h> > +#include "../../base/power/power.h" I don't think it is usual to do this kind of inclusion. Why do you need to do that ? > +#include <linux/irq.h> > > #define UART_NR 14 > > @@ -127,6 +131,7 @@ static struct vendor_data vendor_st = { > .get_fifosize = get_fifosize_st, > }; > > +static int is_suspended = 0; > /* Deals with DMA transactions */ > > struct pl011_sgbuf { > @@ -1376,6 +1381,10 @@ static irqreturn_t pl011_int(int irq, void *dev_id) > pl011_dma_rx_irq(uap); > else > pl011_rx_chars(uap); > + > + if(is_suspended) > + pm_system_wakeup(); I don't think this is needed. > + > } > if (status & (UART011_DSRMIS|UART011_DCDMIS| > UART011_CTSMIS|UART011_RIMIS)) > @@ -2353,11 +2362,29 @@ 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 device * uart_dev; > + struct uart_match match; > > portnr = pl011_find_free_port(); > if (portnr < 0) > @@ -2387,7 +2414,17 @@ 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); > + > + match.port = &uap->port; > + match.driver = &amba_reg; > + > + uart_dev = device_find_child(&dev->dev, &match,match_uart_port); > + > + device_init_wakeup(uart_dev, true); > + dev_pm_set_wake_irq(uart_dev, uap->port.irq); I am sending a patch to move device_init_wakeup into dev_pm_set_wake_irq.
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 50cf5b1..33a479a 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -59,6 +59,10 @@ #include <linux/sizes.h> #include <linux/io.h> #include <linux/acpi.h> +#include <linux/suspend.h> +#include <linux/pm_wakeirq.h> +#include "../../base/power/power.h" +#include <linux/irq.h> #define UART_NR 14 @@ -127,6 +131,7 @@ static struct vendor_data vendor_st = { .get_fifosize = get_fifosize_st, }; +static int is_suspended = 0; /* Deals with DMA transactions */ struct pl011_sgbuf { @@ -1376,6 +1381,10 @@ static irqreturn_t pl011_int(int irq, void *dev_id) pl011_dma_rx_irq(uap); else pl011_rx_chars(uap); + + if(is_suspended) + pm_system_wakeup(); + } if (status & (UART011_DSRMIS|UART011_DCDMIS| UART011_CTSMIS|UART011_RIMIS)) @@ -2353,11 +2362,29 @@ 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 device * uart_dev; + struct uart_match match; portnr = pl011_find_free_port(); if (portnr < 0) @@ -2387,7 +2414,17 @@ 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); + + match.port = &uap->port; + match.driver = &amba_reg; + + uart_dev = device_find_child(&dev->dev, &match,match_uart_port); + + 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) @@ -2403,21 +2440,33 @@ static int pl011_remove(struct amba_device *dev) static int pl011_suspend(struct device *dev) { struct uart_amba_port *uap = dev_get_drvdata(dev); + int ret = 0; if (!uap) return -EINVAL; - return uart_suspend_port(&amba_reg, &uap->port); + ret =uart_suspend_port(&amba_reg, &uap->port); + + if(!ret) + is_suspended = 1; + + return ret; } static int pl011_resume(struct device *dev) { struct uart_amba_port *uap = dev_get_drvdata(dev); + int ret = 0; if (!uap) return -EINVAL; - return uart_resume_port(&amba_reg, &uap->port); + ret = uart_resume_port(&amba_reg, &uap->port); + + if(!ret) + is_suspended = 0; + + return ret; } #endif
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 | 55 ++++++++++++++++++++++++++++++++++++--- 1 file changed, 52 insertions(+), 3 deletions(-)