gpu: nvgpu: move gm20b clk debugfs to linux

Use nvgpu_os_linux_ops to initialize gm20b debugfs
functions.

gm20b_clk_init_debugfs() will be invoked during initialization
from nvgpu_finalize_poweron_linux().

JIRA NVGPU-603

Change-Id: Ie89e427cc589ae14e1e7f5918d918126fb4afd77
Signed-off-by: Nitin Kumbhar <nkumbhar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1797905
Reviewed-by: svc-misra-checker <svc-misra-checker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

drivers/gpu/nvgpu/gm20b/clk_gm20b.c

@@ -1490,17 +1490,6 @@ int gm20b_init_clk_support(struct gk20a *g)
 		err = set_pll_freq(g, 1);
 	}
 	nvgpu_mutex_release(&clk->clk_mutex);
-	if (err) {
-		return err;
-	}
-
-	if (!clk->debugfs_set && g->ops.clk.init_debugfs) {
-		err = g->ops.clk.init_debugfs(g);
-		if (err) {
-			return err;
-		}
-		clk->debugfs_set = true;
-	}
 
 	return err;
 }

drivers/gpu/nvgpu/gm20b/clk_gm20b.h

@@ -70,9 +70,6 @@ int gm20b_gpcclk_set_rate(struct clk_gk20a *clk, unsigned long rate,
 long gm20b_round_rate(struct clk_gk20a *clk, unsigned long rate,
 		unsigned long *parent_rate);
 struct pll_parms *gm20b_get_gpc_pll_parms(void);
-#ifdef CONFIG_DEBUG_FS
-int gm20b_clk_init_debugfs(struct gk20a *g);
-#endif
 
 int gm20b_clk_pll_reg_write(struct gk20a *g, u32 reg, u32 val);
 int gm20b_init_clk_support(struct gk20a *g);

drivers/gpu/nvgpu/gm20b/hal_gm20b.c

@@ -555,9 +555,6 @@ static const struct gpu_ops gm20b_ops = {
 	.clk = {
 		.init_clk_support = gm20b_init_clk_support,
 		.suspend_clk_support = gm20b_suspend_clk_support,
-#ifdef CONFIG_DEBUG_FS
-		.init_debugfs = gm20b_clk_init_debugfs,
-#endif
 		.get_voltage = gm20b_clk_get_voltage,
 		.get_gpcclk_clock_counter = gm20b_clk_get_gpcclk_clock_counter,
 		.pll_reg_write = gm20b_clk_pll_reg_write,

drivers/gpu/nvgpu/os/linux/debug_clk_gm20b.h

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2018, NVIDIA Corporation.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __DEBUG_CLK_GM20B_H
+#define __DEBUG_CLK_GM20B_H
+
+#ifdef CONFIG_DEBUG_FS
+int gm20b_clk_init_debugfs(struct gk20a *g);
+#else
+inline int gm20b_clk_init_debugfs(struct gk20a *g)
+{
+	return 0;
+}
+#endif
+
+#endif

drivers/gpu/nvgpu/os/linux/os_ops_gm20b.c

@@ -17,6 +17,7 @@
 #include "os_linux.h"
 
 #include "cde_gm20b.h"
+#include "debug_clk_gm20b.h"
 
 static struct nvgpu_os_linux_ops gm20b_os_linux_ops = {
 #ifdef CONFIG_NVGPU_SUPPORT_CDE
@@ -24,6 +25,9 @@ static struct nvgpu_os_linux_ops gm20b_os_linux_ops = {
 		.get_program_numbers = gm20b_cde_get_program_numbers,
 	},
 #endif
+	.clk = {
+		.init_debugfs = gm20b_clk_init_debugfs,
+	},
 };
 
 void nvgpu_gm20b_init_os_ops(struct nvgpu_os_linux *l)
@@ -31,4 +35,5 @@ void nvgpu_gm20b_init_os_ops(struct nvgpu_os_linux *l)
 #ifdef CONFIG_NVGPU_SUPPORT_CDE
 	l->ops.cde = gm20b_os_linux_ops.cde;
 #endif
+	l->ops.clk = gm20b_os_linux_ops.clk;
 }