drm/nouveau/volt/gk20a: share reusable members & functions

The CVB calculation and voltage setting functions can be reused for the
future chips. So move the declaration to gk20a.h.
Signed-off-by: Vince Hsu <vinceh@nvidia.com>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk20a.c

@@ -24,21 +24,9 @@
 
 #include <core/tegra.h>
 
-struct cvb_coef {
-	int c0;
-	int c1;
-	int c2;
-	int c3;
-	int c4;
-	int c5;
-};
-
-struct gk20a_volt {
-	struct nvkm_volt base;
-	struct regulator *vdd;
-};
+#include "gk20a.h"
 
-const struct cvb_coef gk20a_cvb_coef[] = {
+static const struct cvb_coef gk20a_cvb_coef[] = {
 	/* MHz,        c0,     c1,   c2,    c3,     c4,   c5 */
 	/*  72 */ { 1209886, -36468,  515,   417, -13123,  203},
 	/* 108 */ { 1130804, -27659,  296,   298, -10834,  221},
@@ -89,7 +77,7 @@ gk20a_volt_get_cvb_t_voltage(int speedo, int temp, int s_scale, int t_scale,
 	return mv;
 }
 
-static int
+int
 gk20a_volt_calc_voltage(const struct cvb_coef *coef, int speedo)
 {
 	int mv;
@@ -100,7 +88,7 @@ gk20a_volt_calc_voltage(const struct cvb_coef *coef, int speedo)
 	return mv * 1000;
 }
 
-static int
+int
 gk20a_volt_vid_get(struct nvkm_volt *base)
 {
 	struct gk20a_volt *volt = gk20a_volt(base);
@@ -115,7 +103,7 @@ gk20a_volt_vid_get(struct nvkm_volt *base)
 	return -EINVAL;
 }
 
-static int
+int
 gk20a_volt_vid_set(struct nvkm_volt *base, u8 vid)
 {
 	struct gk20a_volt *volt = gk20a_volt(base);
@@ -125,7 +113,7 @@ gk20a_volt_vid_set(struct nvkm_volt *base, u8 vid)
 	return regulator_set_voltage(volt->vdd, volt->base.vid[vid].uv, 1200000);
 }
 
-static int
+int
 gk20a_volt_set_id(struct nvkm_volt *base, u8 id, int condition)
 {
 	struct gk20a_volt *volt = gk20a_volt(base);

drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk20a.h

+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __GK20A_VOLT_H__
+#define __GK20A_VOLT_H__
+
+struct cvb_coef {
+	int c0;
+	int c1;
+	int c2;
+	int c3;
+	int c4;
+	int c5;
+};
+
+struct gk20a_volt {
+	struct nvkm_volt base;
+	struct regulator *vdd;
+};
+
+int gk20a_volt_calc_voltage(const struct cvb_coef *coef, int speedo);
+int gk20a_volt_vid_get(struct nvkm_volt *volt);
+int gk20a_volt_vid_set(struct nvkm_volt *volt, u8 vid);
+int gk20a_volt_set_id(struct nvkm_volt *volt, u8 id, int condition);
+
+#endif