gpu: nvgpu: support to parse VF table

JIRA DNVGPU-123

function was added to retrieve V for F or
F for V for a given clock domain.
Clock domain can be master or slave.
F or V can be intermediate point between two
successive V or F values in VF table.
VF table should be cached before calling this function.
A F value below Fmin will return Vmin.
F > Fmax will return error
A V value above Vmax wil return F max.
A V value below Vmin will return error.

Change-Id: I28b4e8647510c6933e9e1204cfff31d74616e11a
Signed-off-by: Vijayakumar <vsubbu@nvidia.com>
Reviewed-on: http://git-master/r/1211234
(cherry-picked from commit 5b83b03f2454fbec8d49a064ed09b09c92d3e9fa)
Reviewed-on: http://git-master/r/1235054
Reviewed-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/clk/clk_domain.h b/drivers/gpu/nvgpu/clk/clk_domain.h
index 2670a066..07976a2a 100644
--- a/drivers/gpu/nvgpu/clk/clk_domain.h
+++ b/drivers/gpu/nvgpu/clk/clk_domain.h
@@ -26,8 +26,13 @@ struct clk_domain;
 /*data and function definition to talk to driver*/
 u32 clk_domain_sw_setup(struct gk20a *g);
 u32 clk_domain_pmu_setup(struct gk20a *g);
+
 typedef u32 clkproglink(struct gk20a *g, struct clk_pmupstate *pclk,
                         struct clk_domain *pdomain);
+
+typedef u32 clkvfsearch(struct gk20a *g, struct clk_pmupstate *pclk,
+                        struct clk_domain *pdomain, u16 *clkmhz,
+                        u32 *voltuv, u8 rail);
 struct clk_domains {
         struct boardobjgrp_e32 super;
         u8 n_num_entries;
@@ -55,6 +60,7 @@ struct clk_domain {
         u8 ratio_domain;
         u8 usage;
         clkproglink *clkdomainclkproglink;
+        clkvfsearch *clkdomainclkvfsearch;
 };
 
 struct clk_domain_3x {
@@ -92,4 +98,8 @@ struct clk_domain_3x_slave {
 
 u32 clk_domain_clk_prog_link(struct gk20a *g, struct clk_pmupstate *pclk);
 
+#define CLK_CLK_DOMAIN_GET(pclk, idx)                                   \
+        ((struct clk_domain *)BOARDOBJGRP_OBJ_GET_BY_IDX(               \
+                &pclk->clk_domainobjs.super.super, (u8)(idx)))
+
 #endif