gpu: nvgpu: Add option to enable GPCPLL NA mode

Added configuration option to enable GM20b GPCPLL noise aware (NA)
mode. In this mode PLL output frequency is automatically adjusted when
GM20b voltage is fluctuating.

NA mode is disabled by default.

Bug 1555318

Change-Id: Ia9741fd02ddacaf4743e5397b729293fa5181f84
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-on: http://git-master/r/534079
Reviewed-by: Yu-Huan Hsu <yhsu@nvidia.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/Kconfig b/drivers/gpu/nvgpu/Kconfig
index 1ea9e060..88c3130d 100644
--- a/drivers/gpu/nvgpu/Kconfig
+++ b/drivers/gpu/nvgpu/Kconfig
@@ -79,3 +79,12 @@ config TEGRA_ACR
           Enable Support for Loading High Secure binary, and using
           Write Protected Regions (WPR) for storing ucodes, and bootstrap
           PMU, FECS and GPCCS in Low Secure mode.
+
+config TEGRA_USE_NA_GPCPLL
+        bool "Enable noise aware mode of GM20B GPCPLL on Tegra"
+        depends on TEGRA_CLK_FRAMEWORK
+        default n
+        help
+          Enable noise aware (NA) mode of GM20b GPCPLL. In this mode PLL output
+          frequency is automatically adjusted when GM20b voltage is fluctuating
+          because of transient PMIC or power distribution tree noise.