gpu: nvgpu: Add DT support for gpu power-domain

First, defining a new structure to support gk20a
power domain. Then making necessary modifications
to add so as to add DT support for gpu power-domain.

bug 200070810

Change-Id: I29e1c24b181e14743d3969103abfd1882d171f07
Signed-off-by: Sumit Singh <sumsingh@nvidia.com>
Reviewed-on: http://git-master/r/668973
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>

1 files changed, 16 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/vgpu/vgpu.c b/drivers/gpu/nvgpu/vgpu/vgpu.c
index d3d793d1..c998b10b 100644
--- a/drivers/gpu/nvgpu/vgpu/vgpu.c
+++ b/drivers/gpu/nvgpu/vgpu/vgpu.c
@@ -311,7 +311,17 @@ static int vgpu_pm_initialise_domain(struct platform_device *pdev)
 {
         struct gk20a_platform *platform = platform_get_drvdata(pdev);
         struct dev_power_governor *pm_domain_gov = NULL;
-        struct generic_pm_domain *domain = &platform->g->pd;
+        struct gk20a_domain_data *vgpu_pd_data;
+        struct generic_pm_domain *domain;
+
+        vgpu_pd_data = (struct gk20a_domain_data *)kzalloc
+                (sizeof(struct gk20a_domain_data), GFP_KERNEL);
+
+        if (!vgpu_pd_data)
+                return -ENOMEM;
+
+        domain = &vgpu_pd_data->gpd;
+        vgpu_pd_data->gk20a = platform->g;
 
         domain->name = "gpu";
 
@@ -432,11 +442,16 @@ int vgpu_probe(struct platform_device *dev)
 int vgpu_remove(struct platform_device *dev)
 {
         struct gk20a *g = get_gk20a(dev);
+        struct gk20a_domain_data *vgpu_gpd;
         gk20a_dbg_fn("");
 
         if (g->remove_support)
                 g->remove_support(dev);
 
+        vgpu_gpd = container_of(&g, struct gk20a_domain_data, gk20a);
+        vgpu_gpd->gk20a = NULL;
+        kfree(vgpu_gpd);
+
         vgpu_comm_deinit();
         gk20a_user_deinit(dev);
         gk20a_get_platform(dev)->g = NULL;