gpu: nvgpu: Cast det_out to u64 for 64-bit calc

voltage_get() defines det_out as u32. That variable is used to
calculate a 64-bit result, so cast det_out to u64.

Change-Id: I054ec299a4c7961cb38dd5ac0cbf0ac173b09efb
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1267692
GVS: Gerrit_Virtual_Submit
Reviewed-by: Thomas Fleury <tfleury@nvidia.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gm20b/clk_gm20b.c b/drivers/gpu/nvgpu/gm20b/clk_gm20b.c
index b1ea7331..906e805a 100644
--- a/drivers/gpu/nvgpu/gm20b/clk_gm20b.c
+++ b/drivers/gpu/nvgpu/gm20b/clk_gm20b.c
@@ -1858,8 +1858,8 @@ static int voltage_get(void *data, u64 *val)
 
         det_out = gk20a_readl(g, trim_sys_gpcpll_cfg3_r());
         det_out = trim_sys_gpcpll_cfg3_dfs_testout_v(det_out);
-        *val = (det_out * gpc_pll_params.uvdet_slope +
-                gpc_pll_params.uvdet_offs) / 1000;
+        *val = div64_u64((u64)det_out * gpc_pll_params.uvdet_slope +
+                gpc_pll_params.uvdet_offs, 1000ULL);
 
         mutex_unlock(&g->clk.clk_mutex);