msm: kgsl: Add new sysfs node to list GPU clock frequencies
Add a new sysfs node to communicate available GPU clock frequencies
to userspace for the power daemons.
Change-Id: I2479217aa797e2066cc50476ef7f73c5cae8aebe
Signed-off-by: Anshuman Dani <adani@codeaurora.org>
Signed-off-by: Rajeev Kulkarni <krajeev@codeaurora.org>
diff --git a/drivers/gpu/msm/kgsl_pwrctrl.c b/drivers/gpu/msm/kgsl_pwrctrl.c
index 9d89b47..e565106 100644
--- a/drivers/gpu/msm/kgsl_pwrctrl.c
+++ b/drivers/gpu/msm/kgsl_pwrctrl.c
@@ -349,6 +349,25 @@
return (unsigned int) (ptr - buf);
}
+static int kgsl_pwrctrl_gpu_available_frequencies_show(
+ struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct kgsl_device *device = kgsl_device_from_dev(dev);
+ struct kgsl_pwrctrl *pwr;
+ int index, num_chars = 0;
+
+ if (device == NULL)
+ return 0;
+ pwr = &device->pwrctrl;
+ for (index = 0; index < pwr->num_pwrlevels - 1; index++)
+ num_chars += snprintf(buf + num_chars, PAGE_SIZE, "%d ",
+ pwr->pwrlevels[index].gpu_freq);
+ buf[num_chars++] = '\n';
+ return num_chars;
+}
+
DEVICE_ATTR(gpuclk, 0644, kgsl_pwrctrl_gpuclk_show, kgsl_pwrctrl_gpuclk_store);
DEVICE_ATTR(max_gpuclk, 0644, kgsl_pwrctrl_max_gpuclk_show,
kgsl_pwrctrl_max_gpuclk_store);
@@ -359,6 +378,9 @@
NULL);
DEVICE_ATTR(gputop, 0444, kgsl_pwrctrl_gputop_show,
NULL);
+DEVICE_ATTR(gpu_available_frequencies, 0444,
+ kgsl_pwrctrl_gpu_available_frequencies_show,
+ NULL);
static const struct device_attribute *pwrctrl_attr_list[] = {
&dev_attr_gpuclk,
@@ -367,6 +389,7 @@
&dev_attr_idle_timer,
&dev_attr_gpubusy,
&dev_attr_gputop,
+ &dev_attr_gpu_available_frequencies,
NULL
};