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, 48 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/clk/clk.c b/drivers/gpu/nvgpu/clk/clk.c
index 0679efc0..34b344c8 100644
--- a/drivers/gpu/nvgpu/clk/clk.c
+++ b/drivers/gpu/nvgpu/clk/clk.c
@@ -188,3 +188,51 @@ u32 clk_pmu_vf_inject(struct gk20a *g)
 done:
         return status;
 }
+
+u32 clk_domain_print_vf_table(struct gk20a *g, u32 clkapidomain)
+{
+        u32 status = -EINVAL;
+        struct clk_domain *pdomain;
+        u8 i;
+        struct clk_pmupstate *pclk = &g->clk_pmu;
+        u16 clkmhz = 0;
+        u32 volt = 0;
+
+        BOARDOBJGRP_FOR_EACH(&(pclk->clk_domainobjs.super.super),
+                        struct clk_domain *, pdomain, i) {
+                if (pdomain->api_domain == clkapidomain) {
+                        status = pdomain->clkdomainclkvfsearch(g, pclk,
+                                pdomain, &clkmhz, &volt,
+                                CLK_PROG_VFE_ENTRY_LOGIC);
+                        return status;
+                }
+        }
+        return status;
+}
+
+u32 clk_domain_get_f_or_v(
+        struct gk20a *g,
+        u32 clkapidomain,
+        u16 *pclkmhz,
+        u32 *pvoltuv
+)
+{
+        u32 status = -EINVAL;
+        struct clk_domain *pdomain;
+        u8 i;
+        struct clk_pmupstate *pclk = &g->clk_pmu;
+
+        if ((pclkmhz == NULL) || (pvoltuv == NULL))
+                return -EINVAL;
+
+        BOARDOBJGRP_FOR_EACH(&(pclk->clk_domainobjs.super.super),
+                        struct clk_domain *, pdomain, i) {
+                if (pdomain->api_domain == clkapidomain) {
+                        status = pdomain->clkdomainclkvfsearch(g, pclk,
+                                pdomain, pclkmhz, pvoltuv,
+                                CLK_PROG_VFE_ENTRY_LOGIC);
+                        return status;
+                }
+        }
+        return status;
+}