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linux-sg2042
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dell-laptop: create a platform device as a parent for the rfkill devices etc. 

dell-laptop may not need to export any sysfs files, but it should still
create a platform device as a parent for the rfkill and backlight
devices.  Otherwise sysfs will display these as "virtual" devices,
with no connection to either physical hardware or the dell-laptop
module.

Apparently this is useful for hardware detection.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Acked-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Alan Jenkins 2009-08-19 15:06:49 +01:00 committed by Len Brown
parent 4311bb230e
commit ada3248a5d
1 changed files with 34 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
drivers/platform/x86/dell-laptop.c
View File

@ -58,6 +58,14 @@ static int da_command_code;
static int da_num_tokens; static int da_num_tokens;
static struct calling_interface_token *da_tokens; static struct calling_interface_token *da_tokens;
static struct platform_driver platform_driver = {
.driver = {
.name = "dell-laptop",
.owner = THIS_MODULE,
}
};
static struct platform_device *platform_device;
static struct backlight_device *dell_backlight_device; static struct backlight_device *dell_backlight_device;
static struct rfkill *wifi_rfkill; static struct rfkill *wifi_rfkill;
static struct rfkill *bluetooth_rfkill; static struct rfkill *bluetooth_rfkill;
@ -217,7 +225,8 @@ static int dell_setup_rfkill(void)
status = buffer.output[1]; status = buffer.output[1];
if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) { if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) {
wifi_rfkill = rfkill_alloc("dell-wifi", NULL, RFKILL_TYPE_WLAN, wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
RFKILL_TYPE_WLAN,
&dell_rfkill_ops, (void *) 1); &dell_rfkill_ops, (void *) 1);
if (!wifi_rfkill) { if (!wifi_rfkill) {
ret = -ENOMEM; ret = -ENOMEM;
@ -229,7 +238,8 @@ static int dell_setup_rfkill(void)
} }
if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) { if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) {
bluetooth_rfkill = rfkill_alloc("dell-bluetooth", NULL, bluetooth_rfkill = rfkill_alloc("dell-bluetooth",
&platform_device->dev,
RFKILL_TYPE_BLUETOOTH, RFKILL_TYPE_BLUETOOTH,
&dell_rfkill_ops, (void *) 2); &dell_rfkill_ops, (void *) 2);
if (!bluetooth_rfkill) { if (!bluetooth_rfkill) {
@ -242,7 +252,9 @@ static int dell_setup_rfkill(void)
} }
if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) { if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) {
wwan_rfkill = rfkill_alloc("dell-wwan", NULL, RFKILL_TYPE_WWAN, wwan_rfkill = rfkill_alloc("dell-wwan",
&platform_device->dev,
RFKILL_TYPE_WWAN,
&dell_rfkill_ops, (void *) 3); &dell_rfkill_ops, (void *) 3);
if (!wwan_rfkill) { if (!wwan_rfkill) {
ret = -ENOMEM; ret = -ENOMEM;
@ -342,6 +354,18 @@ static int __init dell_init(void)
return -ENODEV; return -ENODEV;
} }
ret = platform_driver_register(&platform_driver);
if (ret)
goto fail_platform_driver;
platform_device = platform_device_alloc("dell-laptop", -1);
if (!platform_device) {
ret = -ENOMEM;
goto fail_platform_device1;
}
ret = platform_device_add(platform_device);
if (ret)
goto fail_platform_device2;
ret = dell_setup_rfkill(); ret = dell_setup_rfkill();
if (ret) { if (ret) {
@ -368,7 +392,7 @@ static int __init dell_init(void)
if (max_intensity) { if (max_intensity) {
dell_backlight_device = backlight_device_register( dell_backlight_device = backlight_device_register(
"dell_backlight", "dell_backlight",
NULL, NULL, &platform_device->dev, NULL,
&dell_ops); &dell_ops);
if (IS_ERR(dell_backlight_device)) { if (IS_ERR(dell_backlight_device)) {
@ -388,6 +412,12 @@ static int __init dell_init(void)
fail_backlight: fail_backlight:
dell_cleanup_rfkill(); dell_cleanup_rfkill();
fail_rfkill: fail_rfkill:
platform_device_del(platform_device);
fail_platform_device2:
platform_device_put(platform_device);
fail_platform_device1:
platform_driver_unregister(&platform_driver);
fail_platform_driver:
kfree(da_tokens); kfree(da_tokens);
return ret; return ret;
} }