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gpu: nvgpu: expose linux clock controls via HAL

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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>
This commit is contained in:
ddutta
2018-09-14 10:48:48 +05:30
committed by mobile promotions
parent feefb7046a
commit 1c7258411d
6 changed files with 158 additions and 0 deletions
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3
drivers/gpu/nvgpu/os/linux/platform_gk20a.h
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@@ -274,6 +274,9 @@ struct gk20a_platform {
/* scaling rate */
unsigned long cached_rate;
/* synchronized access to platform->clk_get_freqs */
struct nvgpu_mutex clk_get_freq_lock;
};
static inline struct gk20a_platform *gk20a_get_platform(