From: Javier Achirica <[email protected]> Allows to specify if the USB socket should charge attached devices while the laptop is suspended to ram.
Signed-off-by: Javier Achirica <[email protected]> Signed-off-by: Mattia Dongili <[email protected]> --- drivers/platform/x86/sony-laptop.c | 86 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c index d1f712e..9620285 100644 --- a/drivers/platform/x86/sony-laptop.c +++ b/drivers/platform/x86/sony-laptop.c @@ -164,6 +164,9 @@ static int __sony_nc_gfx_switch_status_get(void); static int sony_nc_highspeed_charging_setup(struct platform_device *pd); static void sony_nc_highspeed_charging_cleanup(struct platform_device *pd); +static int sony_nc_usb_charge_setup(struct platform_device *pd); +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); @@ -1388,6 +1391,12 @@ static void sony_nc_function_setup(struct acpi_device *device, pr_err("couldn't set up keyboard backlight function (%d)\n", result); break; + case 0x0155: + result = sony_nc_usb_charge_setup(pf_device); + if (result) + pr_err("couldn't set up USB charge support (%d)\n", + result); + break; case 0x011D: result = sony_nc_panelid_setup(pf_device); if (result) @@ -1458,6 +1467,9 @@ static void sony_nc_function_cleanup(struct platform_device *pd) case 0x0163: sony_nc_kbd_backlight_cleanup(pd, handle); break; + case 0x0155: + sony_nc_usb_charge_cleanup(pd); + break; case 0x011D: sony_nc_panelid_cleanup(pd); break; @@ -2552,6 +2564,80 @@ static void sony_nc_highspeed_charging_cleanup(struct platform_device *pd) } } +/* USB charge function */ +static struct device_attribute *uc_handle; + +static ssize_t sony_nc_usb_charge_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(0x0155, value << 0x10 | 0x0100, &result)) + return -EIO; + + return count; +} + +static ssize_t sony_nc_usb_charge_show(struct device *dev, + struct device_attribute *attr, char *buffer) +{ + unsigned int result; + + if (sony_call_snc_handle(0x0155, 0x0000, &result)) + return -EIO; + + return snprintf(buffer, PAGE_SIZE, "%d\n", result & 0x01); +} + +static int sony_nc_usb_charge_setup(struct platform_device *pd) +{ + unsigned int result; + + if (sony_call_snc_handle(0x0155, 0x0000, &result) || !(result & 0x01)) { + /* some models advertise the handle but have no implementation + * for it + */ + pr_info("No USB Charge capability found\n"); + return 0; + } + + uc_handle = kzalloc(sizeof(struct device_attribute), GFP_KERNEL); + if (!uc_handle) + return -ENOMEM; + + sysfs_attr_init(&uc_handle->attr); + uc_handle->attr.name = "usb_charge"; + uc_handle->attr.mode = S_IRUGO | S_IWUSR; + uc_handle->show = sony_nc_usb_charge_show; + uc_handle->store = sony_nc_usb_charge_store; + + result = device_create_file(&pd->dev, uc_handle); + if (result) { + kfree(uc_handle); + uc_handle = NULL; + return result; + } + + return 0; +} + +static void sony_nc_usb_charge_cleanup(struct platform_device *pd) +{ + if (uc_handle) { + device_remove_file(&pd->dev, uc_handle); + kfree(uc_handle); + uc_handle = NULL; + } +} + /* Panel ID function */ static struct device_attribute *panel_handle; -- 1.9.0 -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
