1 files changed, 53 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a_sysfs.c b/drivers/gpu/nvgpu/gk20a/gk20a_sysfs.c
index b68073af..8eaee190 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a_sysfs.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a_sysfs.c
@@ -228,6 +228,55 @@ static DEVICE_ATTR(ptimer_scale_factor,
                         ptimer_scale_factor_show,
                         NULL);
 
+static ssize_t ptimer_ref_freq_show(struct device *dev,
+                                        struct device_attribute *attr,
+                                        char *buf)
+{
+        struct gk20a_platform *platform = dev_get_drvdata(dev);
+        u32 src_freq_hz = platform->ptimer_src_freq;
+        ssize_t res;
+
+        if (!src_freq_hz) {
+                dev_err(dev, "reference clk_m rate is not set correctly\n");
+                return -EINVAL;
+        }
+
+        res = sprintf(buf, "%u\n", PTIMER_REF_FREQ_HZ);
+
+        return res;
+
+}
+
+static DEVICE_ATTR(ptimer_ref_freq,
+                        S_IRUGO,
+                        ptimer_ref_freq_show,
+                        NULL);
+
+static ssize_t ptimer_src_freq_show(struct device *dev,
+                                        struct device_attribute *attr,
+                                        char *buf)
+{
+        struct gk20a_platform *platform = dev_get_drvdata(dev);
+        u32 src_freq_hz = platform->ptimer_src_freq;
+        ssize_t res;
+
+        if (!src_freq_hz) {
+                dev_err(dev, "reference clk_m rate is not set correctly\n");
+                return -EINVAL;
+        }
+
+        res = sprintf(buf, "%u\n", src_freq_hz);
+
+        return res;
+
+}
+
+static DEVICE_ATTR(ptimer_src_freq,
+                        S_IRUGO,
+                        ptimer_src_freq_show,
+                        NULL);
+
+
 #if defined(CONFIG_PM) && defined(CONFIG_PM_GENERIC_DOMAINS)
 static ssize_t railgate_enable_store(struct device *dev,
         struct device_attribute *attr, const char *buf, size_t count)
@@ -742,6 +791,8 @@ void gk20a_remove_sysfs(struct device *dev)
         device_remove_file(dev, &dev_attr_blcg_enable);
         device_remove_file(dev, &dev_attr_slcg_enable);
         device_remove_file(dev, &dev_attr_ptimer_scale_factor);
+        device_remove_file(dev, &dev_attr_ptimer_ref_freq);
+        device_remove_file(dev, &dev_attr_ptimer_src_freq);
         device_remove_file(dev, &dev_attr_elpg_enable);
         device_remove_file(dev, &dev_attr_emc3d_ratio);
         device_remove_file(dev, &dev_attr_fmax_at_vmin_safe);
@@ -782,6 +833,8 @@ void gk20a_create_sysfs(struct device *dev)
         error |= device_create_file(dev, &dev_attr_blcg_enable);
         error |= device_create_file(dev, &dev_attr_slcg_enable);
         error |= device_create_file(dev, &dev_attr_ptimer_scale_factor);
+        error |= device_create_file(dev, &dev_attr_ptimer_ref_freq);
+        error |= device_create_file(dev, &dev_attr_ptimer_src_freq);
         error |= device_create_file(dev, &dev_attr_elpg_enable);
         error |= device_create_file(dev, &dev_attr_emc3d_ratio);
         error |= device_create_file(dev, &dev_attr_fmax_at_vmin_safe);