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sony-laptop: add smart connect control function

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The current value is not available through the SNC device and therefore
the attribute is writable only.

Signed-off-by: Javier Achirica <jachirica@gmail.com>
Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
This commit is contained in:
Javier Achirica 2014-03-21 08:01:19 +09:00 committed by Matthew Garrett
parent 0380d4711e
commit d58dc780c4
1 changed files with 67 additions and 0 deletions
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67
drivers/platform/x86/sony-laptop.c
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@ -177,6 +177,9 @@ static void sony_nc_usb_charge_cleanup(struct platform_device *pd);
static int sony_nc_panelid_setup(struct platform_device *pd);
static void sony_nc_panelid_cleanup(struct platform_device *pd);
static int sony_nc_smart_conn_setup(struct platform_device *pd);
static void sony_nc_smart_conn_cleanup(struct platform_device *pd);
static int sony_nc_touchpad_setup(struct platform_device *pd,
unsigned int handle);
static void sony_nc_touchpad_cleanup(struct platform_device *pd);
@ -1422,6 +1425,12 @@ static void sony_nc_function_setup(struct acpi_device *device,
pr_err("couldn't set up panel ID function (%d)\n",
result);
break;
case 0x0168:
result = sony_nc_smart_conn_setup(pf_device);
if (result)
pr_err("couldn't set up smart connect support (%d)\n",
result);
break;
default:
continue;
}
@ -1498,6 +1507,9 @@ static void sony_nc_function_cleanup(struct platform_device *pd)
case 0x011D:
sony_nc_panelid_cleanup(pd);
break;
case 0x0168:
sony_nc_smart_conn_cleanup(pd);
break;
default:
continue;
}
@ -2885,6 +2897,61 @@ static void sony_nc_panelid_cleanup(struct platform_device *pd)
}
}
/* smart connect function */
static struct device_attribute *sc_handle;
static ssize_t sony_nc_smart_conn_store(struct device *dev,
struct device_attribute *attr,
const char *buffer, size_t count)
{
unsigned int result;
unsigned long value;
if (count > 31)
return -EINVAL;
if (kstrtoul(buffer, 10, &value) || value > 1)
return -EINVAL;
if (sony_call_snc_handle(0x0168, value << 0x10, &result))
return -EIO;
return count;
}
static int sony_nc_smart_conn_setup(struct platform_device *pd)
{
unsigned int result;
sc_handle = kzalloc(sizeof(struct device_attribute), GFP_KERNEL);
if (!sc_handle)
return -ENOMEM;
sysfs_attr_init(&sc_handle->attr);
sc_handle->attr.name = "smart_connect";
sc_handle->attr.mode = S_IWUSR;
sc_handle->show = NULL;
sc_handle->store = sony_nc_smart_conn_store;
result = device_create_file(&pd->dev, sc_handle);
if (result) {
kfree(sc_handle);
sc_handle = NULL;
return result;
}
return 0;
}
static void sony_nc_smart_conn_cleanup(struct platform_device *pd)
{
if (sc_handle) {
device_remove_file(&pd->dev, sc_handle);
kfree(sc_handle);
sc_handle = NULL;
}
}
/* Touchpad enable/disable */
struct touchpad_control {
struct device_attribute attr;