On Friday, November 16, 2012 10:43:34 AM Yasuaki Ishimatsu wrote: > Hi Rafael, > > Please merge this patch into your tree. > It has been acked by Len. Applied. Thanks, Rafael > 2012/11/13 16:30, Yasuaki Ishimatsu wrote: > > Hi Rafael, > > > > The patch was rebased on linux-next. Ant it has been acked by Len: > > > > https://lkml.org/lkml/2012/10/10/65 > > > > So please merge it into your tree. > > > > --- > > _SUN method provides the slot unique-ID in the ACPI namespace. And The value > > is written in Advanced Configuration and Power Interface Specification as > > follows: > > > > "The _SUN value is required to be unique among the slots ofthe same type. > > It is also recommended that this number match the slot number printed on > > the physical slot whenever possible." > > > > So if we can know the value, we can identify the physical position of the > > slot in the system. > > > > The patch creates "sun" file in sysfs for identifying physical position > > of the slot. > > > > Reviewed-by: Toshi Kani <toshi.kani@xxxxxx> > > Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx> > > > > --- > > Documentation/ABI/testing/sysfs-devices-sun | 14 ++++++++++++++ > > drivers/acpi/scan.c | 24 ++++++++++++++++++++++++ > > include/acpi/acpi_bus.h | 1 + > > 3 files changed, 39 insertions(+) > > > > Index: linux-next/include/acpi/acpi_bus.h > > =================================================================== > > --- linux-next.orig/include/acpi/acpi_bus.h 2012-11-12 17:58:08.000000000 +0900 > > +++ linux-next/include/acpi/acpi_bus.h 2012-11-12 19:07:33.577427071 +0900 > > @@ -179,6 +179,7 @@ struct acpi_device_pnp { > > acpi_device_name device_name; /* Driver-determined */ > > acpi_device_class device_class; /* " */ > > union acpi_object *str_obj; /* unicode string for _STR method */ > > + unsigned long sun; /* _SUN */ > > }; > > > > #define acpi_device_bid(d) ((d)->pnp.bus_id) > > Index: linux-next/drivers/acpi/scan.c > > =================================================================== > > --- linux-next.orig/drivers/acpi/scan.c 2012-11-12 17:57:44.000000000 +0900 > > +++ linux-next/drivers/acpi/scan.c 2012-11-12 19:08:53.387428254 +0900 > > @@ -292,11 +292,21 @@ static ssize_t description_show(struct d > > } > > static DEVICE_ATTR(description, 0444, description_show, NULL); > > > > +static ssize_t > > +acpi_device_sun_show(struct device *dev, struct device_attribute *attr, > > + char *buf) { > > + struct acpi_device *acpi_dev = to_acpi_device(dev); > > + > > + return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); > > +} > > +static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); > > + > > static int acpi_device_setup_files(struct acpi_device *dev) > > { > > struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; > > acpi_status status; > > acpi_handle temp; > > + unsigned long long sun; > > int result = 0; > > > > /* > > @@ -338,6 +348,16 @@ static int acpi_device_setup_files(struc > > if (dev->pnp.unique_id) > > result = device_create_file(&dev->dev, &dev_attr_uid); > > > > + status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); > > + if (ACPI_SUCCESS(status)) { > > + dev->pnp.sun = (unsigned long)sun; > > + result = device_create_file(&dev->dev, &dev_attr_sun); > > + if (result) > > + goto end; > > + } else { > > + dev->pnp.sun = (unsigned long)-1; > > + } > > + > > /* > > * If device has _EJ0, 'eject' file is created that is used to trigger > > * hot-removal function from userland. > > @@ -369,6 +389,10 @@ static void acpi_device_remove_files(str > > if (ACPI_SUCCESS(status)) > > device_remove_file(&dev->dev, &dev_attr_eject); > > > > + status = acpi_get_handle(dev->handle, "_SUN", &temp); > > + if (ACPI_SUCCESS(status)) > > + device_remove_file(&dev->dev, &dev_attr_sun); > > + > > if (dev->pnp.unique_id) > > device_remove_file(&dev->dev, &dev_attr_uid); > > if (dev->flags.bus_address) > > Index: linux-next/Documentation/ABI/testing/sysfs-devices-sun > > =================================================================== > > --- /dev/null 1970-01-01 00:00:00.000000000 +0000 > > +++ linux-next/Documentation/ABI/testing/sysfs-devices-sun 2012-11-12 19:09:26.854428750 +0900 > > @@ -0,0 +1,14 @@ > > +Whatt: /sys/devices/.../sun > > +Date: October 2012 > > +Contact: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx> > > +Description: > > + The file contains a Slot-unique ID which provided by the _SUN > > + method in the ACPI namespace. The value is written in Advanced > > + Configuration and Power Interface Specification as follows: > > + > > + "The _SUN value is required to be unique among the slots of > > + the same type. It is also recommended that this number match > > + the slot number printed on the physical slot whenever possible." > > + > > + So reading the sysfs file, we can identify a physical position > > + of the slot in the system. > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-acpi" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > > -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
