gpu: nvgpu: vgpu: Implement clk.get_maxfreq

Modify HAL clk->get_maxfreq() signature to match the one in
clk->set_rate() and clk->get_rate(). It allows support of multiple
clocks.

Implement clk.get_maxfreq operation for vgpu and use it to
fill max_freq field in GPU characteristics query.

JIRA NVGPU-388

Change-Id: I93bfc2aa76e38b8a5e0ac55d87c4e26df6fea77f
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1597329
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 14 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/clk.c b/drivers/gpu/nvgpu/common/linux/clk.c
index a9888590..ea5b023d 100644
--- a/drivers/gpu/nvgpu/common/linux/clk.c
+++ b/drivers/gpu/nvgpu/common/linux/clk.c
@@ -106,9 +106,21 @@ static int nvgpu_linux_predict_mv_at_hz_cur_tfloor(struct clk_gk20a *clk,
                                 clk_get_parent(clk->tegra_clk), rate);
 }
 
-static unsigned long nvgpu_linux_get_maxrate(struct clk_gk20a *clk)
+static unsigned long nvgpu_linux_get_maxrate(struct gk20a *g, u32 api_domain)
 {
-        return tegra_dvfs_get_maxrate(clk_get_parent(clk->tegra_clk));
+        int ret;
+
+        switch (api_domain) {
+        case CTRL_CLK_DOMAIN_GPCCLK:
+                ret = tegra_dvfs_get_maxrate(clk_get_parent(g->clk.tegra_clk));
+                break;
+        default:
+                nvgpu_err(g, "unknown clock: %u", api_domain);
+                ret = 0;
+                break;
+        }
+
+        return ret;
 }
 
 static int nvgpu_linux_prepare_enable(struct clk_gk20a *clk)