drm/nouveau/volt/gk20a: split constructor

Split the constructor function so we can reuse the same logic in other
chips.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2014-2016, 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"),
@@ -143,30 +143,25 @@ gk20a_volt = {
 };
 
 int
-gk20a_volt_new(struct nvkm_device *device, int index, struct nvkm_volt **pvolt)
+_gk20a_volt_ctor(struct nvkm_device *device, int index,
+		 const struct cvb_coef *coefs, int nb_coefs,
+		 struct gk20a_volt *volt)
 {
 	struct nvkm_device_tegra *tdev = device->func->tegra(device);
-	struct gk20a_volt *volt;
 	int i, uv;
 
-	if (!(volt = kzalloc(sizeof(*volt), GFP_KERNEL)))
-		return -ENOMEM;
-
 	nvkm_volt_ctor(&gk20a_volt, device, index, &volt->base);
-	*pvolt = &volt->base;
 
 	uv = regulator_get_voltage(tdev->vdd);
-	nvkm_info(&volt->base.subdev, "The default voltage is %duV\n", uv);
+	nvkm_debug(&volt->base.subdev, "the default voltage is %duV\n", uv);
 
 	volt->vdd = tdev->vdd;
 
-	volt->base.vid_nr = ARRAY_SIZE(gk20a_cvb_coef);
-	nvkm_debug(&volt->base.subdev, "%s - vid_nr = %d\n", __func__,
-		   volt->base.vid_nr);
+	volt->base.vid_nr = nb_coefs;
 	for (i = 0; i < volt->base.vid_nr; i++) {
 		volt->base.vid[i].vid = i;
 		volt->base.vid[i].uv =
-			gk20a_volt_calc_voltage(&gk20a_cvb_coef[i],
+			gk20a_volt_calc_voltage(&coefs[i],
 						tdev->gpu_speedo);
 		nvkm_debug(&volt->base.subdev, "%2d: vid=%d, uv=%d\n", i,
 			   volt->base.vid[i].vid, volt->base.vid[i].uv);
@@ -174,3 +169,17 @@ gk20a_volt_new(struct nvkm_device *device, int index, struct nvkm_volt **pvolt)
 
 	return 0;
 }
+
+int
+gk20a_volt_new(struct nvkm_device *device, int index, struct nvkm_volt **pvolt)
+{
+	struct gk20a_volt *volt;
+
+	volt = kzalloc(sizeof(*volt), GFP_KERNEL);
+	if (!volt)
+		return -ENOMEM;
+	*pvolt = &volt->base;
+
+	return _gk20a_volt_ctor(device, index, gk20a_cvb_coef,
+				ARRAY_SIZE(gk20a_cvb_coef), volt);
+}

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

@@ -37,6 +37,10 @@ struct gk20a_volt {
 	struct regulator *vdd;
 };
 
+int _gk20a_volt_ctor(struct nvkm_device *device, int index,
+		     const struct cvb_coef *coefs, int nb_coefs,
+		     struct gk20a_volt *volt);
+
 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);