| Message ID | 1389380231-826-1-git-send-email-srinivas.pandruvada@linux.intel.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On Friday, January 10, 2014 10:57:11 AM Srinivas Pandruvada wrote: > This patch adds a "status" attribute for an acpi device. This status > attribute shows the value of _STA object. The _STA object returns > current status of an ACPI device to show enabled, disabled or removed. > > Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Thanks a lot for sending this, but can you please resend it with CCs to linux-acpi@vger.kernel.org and linux-kernel@vger.kernel.org so that more people know what's going on? Rafael > --- > drivers/acpi/scan.c | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) > > diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c > index fd39459..a5f4a60 100644 > --- a/drivers/acpi/scan.c > +++ b/drivers/acpi/scan.c > @@ -567,6 +567,20 @@ acpi_device_sun_show(struct device *dev, struct device_attribute *attr, > } > static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); > > +static ssize_t status_show(struct device *dev, struct device_attribute *attr, > + char *buf) { > + struct acpi_device *acpi_dev = to_acpi_device(dev); > + acpi_status status; > + unsigned long long sta; > + > + status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta); > + if (ACPI_FAILURE(status)) > + return -ENODEV; > + > + return sprintf(buf, "%llu\n", sta); > +} > +static DEVICE_ATTR_RO(status); > + > static int acpi_device_setup_files(struct acpi_device *dev) > { > struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; > @@ -622,6 +636,12 @@ static int acpi_device_setup_files(struct acpi_device *dev) > dev->pnp.sun = (unsigned long)-1; > } > > + if (acpi_has_method(dev->handle, "_STA")) { > + result = device_create_file(&dev->dev, &dev_attr_status); > + if (result) > + goto end; > + } > + > /* > * If device has _EJ0, 'eject' file is created that is used to trigger > * hot-removal function from userland. > @@ -677,6 +697,8 @@ static void acpi_device_remove_files(struct acpi_device *dev) > device_remove_file(&dev->dev, &dev_attr_adr); > device_remove_file(&dev->dev, &dev_attr_modalias); > device_remove_file(&dev->dev, &dev_attr_hid); > + if (acpi_has_method(dev->handle, "_STA")) > + device_remove_file(&dev->dev, &dev_attr_status); > if (dev->handle) > device_remove_file(&dev->dev, &dev_attr_path); > } >
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index fd39459..a5f4a60 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -567,6 +567,20 @@ acpi_device_sun_show(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); +static ssize_t status_show(struct device *dev, struct device_attribute *attr, + char *buf) { + struct acpi_device *acpi_dev = to_acpi_device(dev); + acpi_status status; + unsigned long long sta; + + status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta); + if (ACPI_FAILURE(status)) + return -ENODEV; + + return sprintf(buf, "%llu\n", sta); +} +static DEVICE_ATTR_RO(status); + static int acpi_device_setup_files(struct acpi_device *dev) { struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; @@ -622,6 +636,12 @@ static int acpi_device_setup_files(struct acpi_device *dev) dev->pnp.sun = (unsigned long)-1; } + if (acpi_has_method(dev->handle, "_STA")) { + result = device_create_file(&dev->dev, &dev_attr_status); + if (result) + goto end; + } + /* * If device has _EJ0, 'eject' file is created that is used to trigger * hot-removal function from userland. @@ -677,6 +697,8 @@ static void acpi_device_remove_files(struct acpi_device *dev) device_remove_file(&dev->dev, &dev_attr_adr); device_remove_file(&dev->dev, &dev_attr_modalias); device_remove_file(&dev->dev, &dev_attr_hid); + if (acpi_has_method(dev->handle, "_STA")) + device_remove_file(&dev->dev, &dev_attr_status); if (dev->handle) device_remove_file(&dev->dev, &dev_attr_path); }
This patch adds a "status" attribute for an acpi device. This status attribute shows the value of _STA object. The _STA object returns current status of an ACPI device to show enabled, disabled or removed. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> --- drivers/acpi/scan.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)