Revert "gpu: nvgpu: Skip reg read of gpc2clk"

This reverts commit 259842f9d222dd2ca2e66bddaceef4a2fd626bc7.
The commit clears some init values that are never restored.

Change-Id: I4efee115863cbfb08b2e280a58b525cb49adc0b6
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/732428

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/priv_ring_gk20a.c b/drivers/gpu/nvgpu/gk20a/priv_ring_gk20a.c
index f5aa3f0f..d11cff06 100644
--- a/drivers/gpu/nvgpu/gk20a/priv_ring_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/priv_ring_gk20a.c
@@ -26,14 +26,12 @@
 
 void gk20a_reset_priv_ring(struct gk20a *g)
 {
-        u32 data = 0;
+        u32 data;
 
         if (tegra_platform_is_linsim())
                 return;
 
-        /* Skipping read and then writeback to this reg, as we are just getting
-        * out of reset, and before this call, the reg is not written to*/
-
+        data = gk20a_readl(g, trim_sys_gpc2clk_out_r());
         data = set_field(data,
                         trim_sys_gpc2clk_out_bypdiv_m(),
                         trim_sys_gpc2clk_out_bypdiv_f(0));