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gpu: nvgpu: sysfs to check if GPU is railgated

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Add below sysfs to check if GPU is railgated or not :
/sys/devices/platform/gpu.0/is_railgated

Bug 200124736

Change-Id: Iafac48bbe82fcd422eeb2b948490e8dc8ad3801a
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/773457
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
This commit is contained in:
Deepak Nibade
2015-07-22 18:34:46 +05:30
parent a76c6fc950
commit ef57db8606
1 changed files with 15 additions and 0 deletions
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15
drivers/gpu/nvgpu/gk20a/gk20a_sysfs.c
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@@ -262,6 +262,19 @@ static ssize_t railgate_delay_show(struct device *dev,
static DEVICE_ATTR(railgate_delay, ROOTRW, railgate_delay_show,
railgate_delay_store);
static ssize_t is_railgated_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gk20a_platform *platform = dev_get_drvdata(dev);
bool is_railgated = 0;
if (platform->is_railgated)
is_railgated = platform->is_railgated(platform->g->dev);
return snprintf(buf, PAGE_SIZE, "%s\n", is_railgated ? "yes" : "no");
}
static DEVICE_ATTR(is_railgated, S_IRUGO, is_railgated_show, NULL);
static ssize_t clockgate_delay_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
@@ -691,6 +704,7 @@ void gk20a_remove_sysfs(struct device *dev)
device_remove_file(dev, &dev_attr_counters_reset);
device_remove_file(dev, &dev_attr_load);
device_remove_file(dev, &dev_attr_railgate_delay);
device_remove_file(dev, &dev_attr_is_railgated);
device_remove_file(dev, &dev_attr_clockgate_delay);
#ifdef CONFIG_PM_RUNTIME
device_remove_file(dev, &dev_attr_force_idle);
@@ -720,6 +734,7 @@ void gk20a_create_sysfs(struct platform_device *dev)
error |= device_create_file(&dev->dev, &dev_attr_counters_reset);
error |= device_create_file(&dev->dev, &dev_attr_load);
error |= device_create_file(&dev->dev, &dev_attr_railgate_delay);
error |= device_create_file(&dev->dev, &dev_attr_is_railgated);
error |= device_create_file(&dev->dev, &dev_attr_clockgate_delay);
#ifdef CONFIG_PM_RUNTIME
error |= device_create_file(&dev->dev, &dev_attr_force_idle);