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, 6 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/platform_gv11b_tegra.c b/drivers/gpu/nvgpu/os/linux/platform_gv11b_tegra.c
index 1b4a5456..b055eb6e 100644
--- a/drivers/gpu/nvgpu/os/linux/platform_gv11b_tegra.c
+++ b/drivers/gpu/nvgpu/os/linux/platform_gv11b_tegra.c
@@ -97,6 +97,8 @@ static int gv11b_tegra_probe(struct device *dev)
         gp10b_tegra_get_clocks(dev);
         nvgpu_linux_init_clk_support(platform->g);
 
+        nvgpu_mutex_init(&platform->clk_get_freq_lock);
+
         return 0;
 }
 
@@ -108,12 +110,16 @@ static int gv11b_tegra_late_probe(struct device *dev)
 
 static int gv11b_tegra_remove(struct device *dev)
 {
+        struct gk20a_platform *platform = gk20a_get_platform(dev);
+
         gv11b_tegra_scale_exit(dev);
 
 #ifdef CONFIG_TEGRA_GK20A_NVHOST
         nvgpu_free_nvhost_dev(get_gk20a(dev));
 #endif
 
+        nvgpu_mutex_destroy(&platform->clk_get_freq_lock);
+
         return 0;
 }