diff options
author | Javier Achirica <jachirica@gmail.com> | 2014-03-21 08:01:17 +0900 |
---|---|---|
committer | Matthew Garrett <matthew.garrett@nebula.com> | 2014-04-06 12:58:12 -0400 |
commit | 168de1add461184df0ec27258518be94f277b023 (patch) | |
tree | b09c6f2b03c9e4967a178f5d67f5b440a7a6221f /drivers/platform | |
parent | c62f15395c780fff606cfec23d66417a80a5ad81 (diff) |
sony-laptop: add hibernate on low battery function
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>
Diffstat (limited to 'drivers/platform')
-rw-r--r-- | drivers/platform/x86/sony-laptop.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c index 7b5a56d59ba..ba39a29a9f3 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_lowbatt_setup(struct platform_device *pd); +static void sony_nc_lowbatt_cleanup(struct platform_device *pd); + static int sony_nc_fanspeed_setup(struct platform_device *pd); static void sony_nc_fanspeed_cleanup(struct platform_device *pd); @@ -1394,6 +1397,12 @@ static void sony_nc_function_setup(struct acpi_device *device, pr_err("couldn't set up keyboard backlight function (%d)\n", result); break; + case 0x0121: + result = sony_nc_lowbatt_setup(pf_device); + if (result) + pr_err("couldn't set up low battery function (%d)\n", + result); + break; case 0x0149: result = sony_nc_fanspeed_setup(pf_device); if (result) @@ -1476,6 +1485,9 @@ static void sony_nc_function_cleanup(struct platform_device *pd) case 0x0163: sony_nc_kbd_backlight_cleanup(pd, handle); break; + case 0x0121: + sony_nc_lowbatt_cleanup(pd); + break; case 0x0149: sony_nc_fanspeed_cleanup(pd); break; @@ -2576,6 +2588,72 @@ static void sony_nc_highspeed_charging_cleanup(struct platform_device *pd) } } +/* low battery function */ +static struct device_attribute *lowbatt_handle; + +static ssize_t sony_nc_lowbatt_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(0x0121, value << 8, &result)) + return -EIO; + + return count; +} + +static ssize_t sony_nc_lowbatt_show(struct device *dev, + struct device_attribute *attr, char *buffer) +{ + unsigned int result; + + if (sony_call_snc_handle(0x0121, 0x0200, &result)) + return -EIO; + + return snprintf(buffer, PAGE_SIZE, "%d\n", result & 1); +} + +static int sony_nc_lowbatt_setup(struct platform_device *pd) +{ + unsigned int result; + + lowbatt_handle = kzalloc(sizeof(struct device_attribute), GFP_KERNEL); + if (!lowbatt_handle) + return -ENOMEM; + + sysfs_attr_init(&lowbatt_handle->attr); + lowbatt_handle->attr.name = "lowbatt_hibernate"; + lowbatt_handle->attr.mode = S_IRUGO | S_IWUSR; + lowbatt_handle->show = sony_nc_lowbatt_show; + lowbatt_handle->store = sony_nc_lowbatt_store; + + result = device_create_file(&pd->dev, lowbatt_handle); + if (result) { + kfree(lowbatt_handle); + lowbatt_handle = NULL; + return result; + } + + return 0; +} + +static void sony_nc_lowbatt_cleanup(struct platform_device *pd) +{ + if (lowbatt_handle) { + device_remove_file(&pd->dev, lowbatt_handle); + kfree(lowbatt_handle); + lowbatt_handle = NULL; + } +} + /* fan speed function */ static struct device_attribute *fan_handle, *hsf_handle; |