diff options
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/sony-laptop.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c index bc7f40bcd9cc..fcbedc972021 100644 --- a/drivers/platform/x86/sony-laptop.c +++ b/drivers/platform/x86/sony-laptop.c @@ -155,6 +155,9 @@ static void sony_nc_thermal_resume(void); static int sony_nc_lid_resume_setup(struct platform_device *pd); static void sony_nc_lid_resume_cleanup(struct platform_device *pd); +static int sony_nc_highspeed_charging_setup(struct platform_device *pd); +static void sony_nc_highspeed_charging_cleanup(struct platform_device *pd); + enum sony_nc_rfkill { SONY_WIFI, SONY_BLUETOOTH, @@ -1301,6 +1304,12 @@ static void sony_nc_function_setup(struct acpi_device *device, pr_err("couldn't set up thermal profile function (%d)\n", result); break; + case 0x0131: + result = sony_nc_highspeed_charging_setup(pf_device); + if (result) + pr_err("couldn't set up high speed charging function (%d)\n", + result); + break; case 0x0124: case 0x0135: sony_nc_rfkill_setup(device); @@ -1348,6 +1357,9 @@ static void sony_nc_function_cleanup(struct platform_device *pd) case 0x0122: sony_nc_thermal_cleanup(pd); break; + case 0x0131: + sony_nc_highspeed_charging_cleanup(pd); + break; case 0x0124: case 0x0135: sony_nc_rfkill_cleanup(); @@ -2246,6 +2258,80 @@ static void sony_nc_lid_resume_cleanup(struct platform_device *pd) } } +/* High speed charging function */ +static struct device_attribute *hsc_handle; + +static ssize_t sony_nc_highspeed_charging_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(0x0131, value << 0x10 | 0x0200, &result)) + return -EIO; + + return count; +} + +static ssize_t sony_nc_highspeed_charging_show(struct device *dev, + struct device_attribute *attr, char *buffer) +{ + unsigned int result; + + if (sony_call_snc_handle(0x0131, 0x0100, &result)) + return -EIO; + + return snprintf(buffer, PAGE_SIZE, "%d\n", result & 0x01); +} + +static int sony_nc_highspeed_charging_setup(struct platform_device *pd) +{ + unsigned int result; + + if (sony_call_snc_handle(0x0131, 0x0000, &result) || !(result & 0x01)) { + /* some models advertise the handle but have no implementation + * for it + */ + pr_info("No High Speed Charging capability found\n"); + return 0; + } + + hsc_handle = kzalloc(sizeof(struct device_attribute), GFP_KERNEL); + if (!hsc_handle) + return -ENOMEM; + + sysfs_attr_init(&hsc_handle->attr); + hsc_handle->attr.name = "battery_highspeed_charging"; + hsc_handle->attr.mode = S_IRUGO | S_IWUSR; + hsc_handle->show = sony_nc_highspeed_charging_show; + hsc_handle->store = sony_nc_highspeed_charging_store; + + result = device_create_file(&pd->dev, hsc_handle); + if (result) { + kfree(hsc_handle); + hsc_handle = NULL; + return result; + } + + return 0; +} + +static void sony_nc_highspeed_charging_cleanup(struct platform_device *pd) +{ + if (hsc_handle) { + device_remove_file(&pd->dev, hsc_handle); + kfree(hsc_handle); + hsc_handle = NULL; + } +} + static void sony_nc_backlight_ng_read_limits(int handle, struct sony_backlight_props *props) { |