gpu: nvgpu: expose linux clock controls via HAL

Expose the linux specific clock implementations via the HAL
interface to allow nvgpu to use the controls globally. This patch
does the following.

1) Implement a new ops interface and a corresponding linux specific
   implementation for allowing nvgpu to iterate through a list of
   available clock frequencies via nvgpu_linux_clk_get_f_points().

2) Implement nvgpu_linux_clk_get_range().

Bug 2061372

Change-Id: I7ce9a999dbdcd9fafcc84301af148545f6ca97a9
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1774280
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/include/nvgpu/gk20a.h b/drivers/gpu/nvgpu/include/nvgpu/gk20a.h
index 8f2881ec..5821f742 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/gk20a.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/gk20a.h
@@ -1086,6 +1086,10 @@ struct gpu_ops {
                 int (*clk_domain_get_f_points)(struct gk20a *g,
                         u32 clkapidomain, u32 *pfpointscount,
                         u16 *pfreqpointsinmhz);
+                int (*clk_get_round_rate)(struct gk20a *g, u32 api_domain,
+                        unsigned long rate_target, unsigned long *rounded_rate);
+                int (*get_clk_range)(struct gk20a *g, u32 api_domain,
+                        u16 *min_mhz, u16 *max_mhz);
                 unsigned long (*measure_freq)(struct gk20a *g, u32 api_domain);
                 u32 (*get_rate_cntr)(struct gk20a *g, struct namemap_cfg *c);
                 unsigned long (*get_rate)(struct gk20a *g, u32 api_domain);