drivers/clk/clk-mb86s7x.c - linux - Git at Google

 /*
  * Copyright (C) 2013-2015 FUJITSU SEMICONDUCTOR LIMITED
  * Copyright (C) 2015 Linaro Ltd.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, version 2 of the License.
  *
  * This program is distributed in the hope that 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.
  */

 #include <linux/clkdev.h>
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/cpu.h>
 #include <linux/clk-provider.h>
 #include <linux/spinlock.h>
 #include <linux/module.h>
 #include <linux/topology.h>
 #include <linux/mailbox_client.h>
 #include <linux/platform_device.h>

 #include <soc/mb86s7x/scb_mhu.h>

 #define to_crg_clk(p) container_of(p, struct crg_clk, hw)
 #define to_clc_clk(p) container_of(p, struct cl_clk, hw)

 struct mb86s7x_peri_clk {
 	u32 payload_size;
 	u32 cntrlr;
 	u32 domain;
 	u32 port;
 	u32 en;
 	u64 frequency;
 } __packed __aligned(4);

 struct hack_rate {
 	unsigned clk_id;
 	unsigned long rate;
 	int gated;
 };

 struct crg_clk {
 	struct clk_hw hw;
 	u8 cntrlr, domain, port;
 };

 static int crg_gate_control(struct clk_hw *hw, int en)
 {
 	struct crg_clk *crgclk = to_crg_clk(hw);
 	struct mb86s7x_peri_clk cmd;
 	int ret;

 	cmd.payload_size = sizeof(cmd);
 	cmd.cntrlr = crgclk->cntrlr;
 	cmd.domain = crgclk->domain;
 	cmd.port = crgclk->port;
 	cmd.en = en;

 	/* Port is UngatedCLK */
 	if (cmd.port == 8)
 		return en ? 0 : -EINVAL;

 	pr_debug("%s:%d CMD Cntrlr-%u Dom-%u Port-%u En-%u}\n",
 		 __func__, __LINE__, cmd.cntrlr,
 		 cmd.domain, cmd.port, cmd.en);

 	ret = mb86s7x_send_packet(CMD_PERI_CLOCK_GATE_SET_REQ,
 				  &cmd, sizeof(cmd));
 	if (ret < 0) {
 		pr_err("%s:%d failed!\n", __func__, __LINE__);
 		return ret;
 	}

 	pr_debug("%s:%d REP Cntrlr-%u Dom-%u Port-%u En-%u}\n",
 		 __func__, __LINE__, cmd.cntrlr,
 		 cmd.domain, cmd.port, cmd.en);

 	/* If the request was rejected */
 	if (cmd.en != en)
 		ret = -EINVAL;
 	else
 		ret = 0;

 	return ret;
 }

 static int crg_port_prepare(struct clk_hw *hw)
 {
 	return crg_gate_control(hw, 1);
 }

 static void crg_port_unprepare(struct clk_hw *hw)
 {
 	crg_gate_control(hw, 0);
 }

 static int
 crg_rate_control(struct clk_hw *hw, int set, unsigned long *rate)
 {
 	struct crg_clk *crgclk = to_crg_clk(hw);
 	struct mb86s7x_peri_clk cmd;
 	int code, ret;

 	cmd.payload_size = sizeof(cmd);
 	cmd.cntrlr = crgclk->cntrlr;
 	cmd.domain = crgclk->domain;
 	cmd.port = crgclk->port;
 	cmd.frequency = *rate;

 	if (set) {
 		code = CMD_PERI_CLOCK_RATE_SET_REQ;
 		pr_debug("%s:%d CMD Cntrlr-%u Dom-%u Port-%u Rate-SET %lluHz}\n",
 			 __func__, __LINE__, cmd.cntrlr,
 			 cmd.domain, cmd.port, cmd.frequency);
 	} else {
 		code = CMD_PERI_CLOCK_RATE_GET_REQ;
 		pr_debug("%s:%d CMD Cntrlr-%u Dom-%u Port-%u Rate-GET}\n",
 			 __func__, __LINE__, cmd.cntrlr,
 			 cmd.domain, cmd.port);
 	}

 	ret = mb86s7x_send_packet(code, &cmd, sizeof(cmd));
 	if (ret < 0) {
 		pr_err("%s:%d failed!\n", __func__, __LINE__);
 		return ret;
 	}

 	if (set)
 		pr_debug("%s:%d REP Cntrlr-%u Dom-%u Port-%u Rate-SET %lluHz}\n",
 			 __func__, __LINE__, cmd.cntrlr,
 			 cmd.domain, cmd.port, cmd.frequency);
 	else
 		pr_debug("%s:%d REP Cntrlr-%u Dom-%u Port-%u Rate-GOT %lluHz}\n",
 			 __func__, __LINE__, cmd.cntrlr,
 			 cmd.domain, cmd.port, cmd.frequency);

 	*rate = cmd.frequency;
 	return 0;
 }

 static unsigned long
 crg_port_recalc_rate(struct clk_hw *hw,	unsigned long parent_rate)
 {
 	unsigned long rate;

 	crg_rate_control(hw, 0, &rate);

 	return rate;
 }

 static long
 crg_port_round_rate(struct clk_hw *hw,
 		    unsigned long rate, unsigned long *pr)
 {
 	return rate;
 }

 static int
 crg_port_set_rate(struct clk_hw *hw,
 		  unsigned long rate, unsigned long parent_rate)
 {
 	return crg_rate_control(hw, 1, &rate);
 }

 const struct clk_ops crg_port_ops = {
 	.prepare = crg_port_prepare,
 	.unprepare = crg_port_unprepare,
 	.recalc_rate = crg_port_recalc_rate,
 	.round_rate = crg_port_round_rate,
 	.set_rate = crg_port_set_rate,
 };

 struct mb86s70_crg11 {
 	struct mutex lock; /* protects CLK populating and searching */
 };

 static struct clk *crg11_get(struct of_phandle_args *clkspec, void *data)
 {
 	struct mb86s70_crg11 *crg11 = data;
 	struct clk_init_data init;
 	u32 cntrlr, domain, port;
 	struct crg_clk *crgclk;
 	struct clk *clk;
 	char clkp[20];

 	if (clkspec->args_count != 3)
 		return ERR_PTR(-EINVAL);

 	cntrlr = clkspec->args[0];
 	domain = clkspec->args[1];
 	port = clkspec->args[2];

 	if (port > 7)
 		snprintf(clkp, 20, "UngatedCLK%d_%X", cntrlr, domain);
 	else
 		snprintf(clkp, 20, "CLK%d_%X_%d", cntrlr, domain, port);

 	mutex_lock(&crg11->lock);

 	clk = __clk_lookup(clkp);
 	if (clk) {
 		mutex_unlock(&crg11->lock);
 		return clk;
 	}

 	crgclk = kzalloc(sizeof(*crgclk), GFP_KERNEL);
 	if (!crgclk) {
 		mutex_unlock(&crg11->lock);
 		return ERR_PTR(-ENOMEM);
 	}

 	init.name = clkp;
 	init.num_parents = 0;
 	init.ops = &crg_port_ops;
 	init.flags = 0;
 	crgclk->hw.init = &init;
 	crgclk->cntrlr = cntrlr;
 	crgclk->domain = domain;
 	crgclk->port = port;
 	clk = clk_register(NULL, &crgclk->hw);
 	if (IS_ERR(clk))
 		pr_err("%s:%d Error!\n", __func__, __LINE__);
 	else
 		pr_debug("Registered %s\n", clkp);

 	clk_register_clkdev(clk, clkp, NULL);
 	mutex_unlock(&crg11->lock);
 	return clk;
 }

 static void __init crg_port_init(struct device_node *node)
 {
 	struct mb86s70_crg11 *crg11;

 	crg11 = kzalloc(sizeof(*crg11), GFP_KERNEL);
 	if (!crg11)
 		return;

 	mutex_init(&crg11->lock);

 	of_clk_add_provider(node, crg11_get, crg11);
 }
 CLK_OF_DECLARE(crg11_gate, "fujitsu,mb86s70-crg11", crg_port_init);

 struct cl_clk {
 	struct clk_hw hw;
 	int cluster;
 };

 struct mb86s7x_cpu_freq {
 	u32 payload_size;
 	u32 cluster_class;
 	u32 cluster_id;
 	u32 cpu_id;
 	u64 frequency;
 };

 static void mhu_cluster_rate(struct clk_hw *hw, unsigned long *rate, int get)
 {
 	struct cl_clk *clc = to_clc_clk(hw);
 	struct mb86s7x_cpu_freq cmd;
 	int code, ret;

 	cmd.payload_size = sizeof(cmd);
 	cmd.cluster_class = 0;
 	cmd.cluster_id = clc->cluster;
 	cmd.cpu_id = 0;
 	cmd.frequency = *rate;

 	if (get)
 		code = CMD_CPU_CLOCK_RATE_GET_REQ;
 	else
 		code = CMD_CPU_CLOCK_RATE_SET_REQ;

 	pr_debug("%s:%d CMD Cl_Class-%u CL_ID-%u CPU_ID-%u Freq-%llu}\n",
 		 __func__, __LINE__, cmd.cluster_class,
 		 cmd.cluster_id, cmd.cpu_id, cmd.frequency);

 	ret = mb86s7x_send_packet(code, &cmd, sizeof(cmd));
 	if (ret < 0) {
 		pr_err("%s:%d failed!\n", __func__, __LINE__);
 		return;
 	}

 	pr_debug("%s:%d REP Cl_Class-%u CL_ID-%u CPU_ID-%u Freq-%llu}\n",
 		 __func__, __LINE__, cmd.cluster_class,
 		 cmd.cluster_id, cmd.cpu_id, cmd.frequency);

 	*rate = cmd.frequency;
 }

 static unsigned long
 clc_recalc_rate(struct clk_hw *hw, unsigned long unused)
 {
 	unsigned long rate;

 	mhu_cluster_rate(hw, &rate, 1);
 	return rate;
 }

 static long
 clc_round_rate(struct clk_hw *hw, unsigned long rate,
 	       unsigned long *unused)
 {
 	return rate;
 }

 static int
 clc_set_rate(struct clk_hw *hw, unsigned long rate,
 	     unsigned long unused)
 {
 	unsigned long res = rate;

 	mhu_cluster_rate(hw, &res, 0);

 	return (res == rate) ? 0 : -EINVAL;
 }

 static struct clk_ops clk_clc_ops = {
 	.recalc_rate = clc_recalc_rate,
 	.round_rate = clc_round_rate,
 	.set_rate = clc_set_rate,
 };

 static struct clk_hw *mb86s7x_clclk_register(struct device *cpu_dev)
 {
 	struct clk_init_data init;
 	struct cl_clk *clc;
 	int ret;

 	clc = kzalloc(sizeof(*clc), GFP_KERNEL);
 	if (!clc)
 		return ERR_PTR(-ENOMEM);

 	clc->hw.init = &init;
 	clc->cluster = topology_physical_package_id(cpu_dev->id);

 	init.name = dev_name(cpu_dev);
 	init.ops = &clk_clc_ops;
 	init.flags = CLK_GET_RATE_NOCACHE;
 	init.num_parents = 0;

 	ret = devm_clk_hw_register(cpu_dev, &clc->hw);
 	if (ret)
 		return ERR_PTR(ret);
 	return &clc->hw;
 }

 static int mb86s7x_clclk_of_init(void)
 {
 	int cpu, ret = -ENODEV;
 	struct device_node *np;
 	struct clk_hw *hw;

 	np = of_find_compatible_node(NULL, NULL, "fujitsu,mb86s70-scb-1.0");
 	if (!np || !of_device_is_available(np))
 		goto exit;

 	for_each_possible_cpu(cpu) {
 		struct device *cpu_dev = get_cpu_device(cpu);

 		if (!cpu_dev) {
 			pr_err("failed to get cpu%d device\n", cpu);
 			continue;
 		}

 		hw = mb86s7x_clclk_register(cpu_dev);
 		if (IS_ERR(hw)) {
 			pr_err("failed to register cpu%d clock\n", cpu);
 			continue;
 		}
 		if (clk_hw_register_clkdev(hw, NULL, dev_name(cpu_dev))) {
 			pr_err("failed to register cpu%d clock lookup\n", cpu);
 			continue;
 		}
 		pr_debug("registered clk for %s\n", dev_name(cpu_dev));
 	}
 	ret = 0;

 	platform_device_register_simple("arm-bL-cpufreq-dt", -1, NULL, 0);
 exit:
 	of_node_put(np);
 	return ret;
 }
 module_init(mb86s7x_clclk_of_init);
	/*
	* Copyright (C) 2013-2015 FUJITSU SEMICONDUCTOR LIMITED
	* Copyright (C) 2015 Linaro Ltd.
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation, version 2 of the License.
	*
	* This program is distributed in the hope that 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.
	*/

	#include <linux/clkdev.h>
	#include <linux/err.h>
	#include <linux/io.h>
	#include <linux/of.h>
	#include <linux/cpu.h>
	#include <linux/clk-provider.h>
	#include <linux/spinlock.h>
	#include <linux/module.h>
	#include <linux/topology.h>
	#include <linux/mailbox_client.h>
	#include <linux/platform_device.h>

	#include <soc/mb86s7x/scb_mhu.h>

	#define to_crg_clk(p) container_of(p, struct crg_clk, hw)
	#define to_clc_clk(p) container_of(p, struct cl_clk, hw)

	struct mb86s7x_peri_clk {
	u32 payload_size;
	u32 cntrlr;
	u32 domain;
	u32 port;
	u32 en;
	u64 frequency;
	} __packed __aligned(4);

	struct hack_rate {
	unsigned clk_id;
	unsigned long rate;
	int gated;
	};

	struct crg_clk {
	struct clk_hw hw;
	u8 cntrlr, domain, port;
	};

	static int crg_gate_control(struct clk_hw *hw, int en)
	{
	struct crg_clk *crgclk = to_crg_clk(hw);
	struct mb86s7x_peri_clk cmd;
	int ret;

	cmd.payload_size = sizeof(cmd);
	cmd.cntrlr = crgclk->cntrlr;
	cmd.domain = crgclk->domain;
	cmd.port = crgclk->port;
	cmd.en = en;

	/* Port is UngatedCLK */
	if (cmd.port == 8)
	return en ? 0 : -EINVAL;

	pr_debug("%s:%d CMD Cntrlr-%u Dom-%u Port-%u En-%u}\n",
	__func__, __LINE__, cmd.cntrlr,
	cmd.domain, cmd.port, cmd.en);

	ret = mb86s7x_send_packet(CMD_PERI_CLOCK_GATE_SET_REQ,
	&cmd, sizeof(cmd));
	if (ret < 0) {
	pr_err("%s:%d failed!\n", __func__, __LINE__);
	return ret;
	}

	pr_debug("%s:%d REP Cntrlr-%u Dom-%u Port-%u En-%u}\n",
	__func__, __LINE__, cmd.cntrlr,
	cmd.domain, cmd.port, cmd.en);

	/* If the request was rejected */
	if (cmd.en != en)
	ret = -EINVAL;
	else
	ret = 0;

	return ret;
	}

	static int crg_port_prepare(struct clk_hw *hw)
	{
	return crg_gate_control(hw, 1);
	}

	static void crg_port_unprepare(struct clk_hw *hw)
	{
	crg_gate_control(hw, 0);
	}

	static int
	crg_rate_control(struct clk_hw hw, int set, unsigned long rate)
	{
	struct crg_clk *crgclk = to_crg_clk(hw);
	struct mb86s7x_peri_clk cmd;
	int code, ret;

	cmd.payload_size = sizeof(cmd);
	cmd.cntrlr = crgclk->cntrlr;
	cmd.domain = crgclk->domain;
	cmd.port = crgclk->port;
	cmd.frequency = *rate;

	if (set) {
	code = CMD_PERI_CLOCK_RATE_SET_REQ;
	pr_debug("%s:%d CMD Cntrlr-%u Dom-%u Port-%u Rate-SET %lluHz}\n",
	__func__, __LINE__, cmd.cntrlr,
	cmd.domain, cmd.port, cmd.frequency);
	} else {
	code = CMD_PERI_CLOCK_RATE_GET_REQ;
	pr_debug("%s:%d CMD Cntrlr-%u Dom-%u Port-%u Rate-GET}\n",
	__func__, __LINE__, cmd.cntrlr,
	cmd.domain, cmd.port);
	}

	ret = mb86s7x_send_packet(code, &cmd, sizeof(cmd));
	if (ret < 0) {
	pr_err("%s:%d failed!\n", __func__, __LINE__);
	return ret;
	}

	if (set)
	pr_debug("%s:%d REP Cntrlr-%u Dom-%u Port-%u Rate-SET %lluHz}\n",
	__func__, __LINE__, cmd.cntrlr,
	cmd.domain, cmd.port, cmd.frequency);
	else
	pr_debug("%s:%d REP Cntrlr-%u Dom-%u Port-%u Rate-GOT %lluHz}\n",
	__func__, __LINE__, cmd.cntrlr,
	cmd.domain, cmd.port, cmd.frequency);

	*rate = cmd.frequency;
	return 0;
	}

	static unsigned long
	crg_port_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
	{
	unsigned long rate;

	crg_rate_control(hw, 0, &rate);

	return rate;
	}

	static long
	crg_port_round_rate(struct clk_hw *hw,
	unsigned long rate, unsigned long *pr)
	{
	return rate;
	}

	static int
	crg_port_set_rate(struct clk_hw *hw,
	unsigned long rate, unsigned long parent_rate)
	{
	return crg_rate_control(hw, 1, &rate);
	}

	const struct clk_ops crg_port_ops = {
	.prepare = crg_port_prepare,
	.unprepare = crg_port_unprepare,
	.recalc_rate = crg_port_recalc_rate,
	.round_rate = crg_port_round_rate,
	.set_rate = crg_port_set_rate,
	};

	struct mb86s70_crg11 {
	struct mutex lock; /* protects CLK populating and searching */
	};

	static struct clk crg11_get(struct of_phandle_args clkspec, void *data)
	{
	struct mb86s70_crg11 *crg11 = data;
	struct clk_init_data init;
	u32 cntrlr, domain, port;
	struct crg_clk *crgclk;
	struct clk *clk;
	char clkp[20];

	if (clkspec->args_count != 3)
	return ERR_PTR(-EINVAL);

	cntrlr = clkspec->args[0];
	domain = clkspec->args[1];
	port = clkspec->args[2];

	if (port > 7)
	snprintf(clkp, 20, "UngatedCLK%d_%X", cntrlr, domain);
	else
	snprintf(clkp, 20, "CLK%d_%X_%d", cntrlr, domain, port);

	mutex_lock(&crg11->lock);

	clk = __clk_lookup(clkp);
	if (clk) {
	mutex_unlock(&crg11->lock);
	return clk;
	}

	crgclk = kzalloc(sizeof(*crgclk), GFP_KERNEL);
	if (!crgclk) {
	mutex_unlock(&crg11->lock);
	return ERR_PTR(-ENOMEM);
	}

	init.name = clkp;
	init.num_parents = 0;
	init.ops = &crg_port_ops;
	init.flags = 0;
	crgclk->hw.init = &init;
	crgclk->cntrlr = cntrlr;
	crgclk->domain = domain;
	crgclk->port = port;
	clk = clk_register(NULL, &crgclk->hw);
	if (IS_ERR(clk))
	pr_err("%s:%d Error!\n", __func__, __LINE__);
	else
	pr_debug("Registered %s\n", clkp);

	clk_register_clkdev(clk, clkp, NULL);
	mutex_unlock(&crg11->lock);
	return clk;
	}

	static void __init crg_port_init(struct device_node *node)
	{
	struct mb86s70_crg11 *crg11;

	crg11 = kzalloc(sizeof(*crg11), GFP_KERNEL);
	if (!crg11)
	return;

	mutex_init(&crg11->lock);

	of_clk_add_provider(node, crg11_get, crg11);
	}
	CLK_OF_DECLARE(crg11_gate, "fujitsu,mb86s70-crg11", crg_port_init);

	struct cl_clk {
	struct clk_hw hw;
	int cluster;
	};

	struct mb86s7x_cpu_freq {
	u32 payload_size;
	u32 cluster_class;
	u32 cluster_id;
	u32 cpu_id;
	u64 frequency;
	};

	static void mhu_cluster_rate(struct clk_hw hw, unsigned long rate, int get)
	{
	struct cl_clk *clc = to_clc_clk(hw);
	struct mb86s7x_cpu_freq cmd;
	int code, ret;

	cmd.payload_size = sizeof(cmd);
	cmd.cluster_class = 0;
	cmd.cluster_id = clc->cluster;
	cmd.cpu_id = 0;
	cmd.frequency = *rate;

	if (get)
	code = CMD_CPU_CLOCK_RATE_GET_REQ;
	else
	code = CMD_CPU_CLOCK_RATE_SET_REQ;

	pr_debug("%s:%d CMD Cl_Class-%u CL_ID-%u CPU_ID-%u Freq-%llu}\n",
	__func__, __LINE__, cmd.cluster_class,
	cmd.cluster_id, cmd.cpu_id, cmd.frequency);

	ret = mb86s7x_send_packet(code, &cmd, sizeof(cmd));
	if (ret < 0) {
	pr_err("%s:%d failed!\n", __func__, __LINE__);
	return;
	}

	pr_debug("%s:%d REP Cl_Class-%u CL_ID-%u CPU_ID-%u Freq-%llu}\n",
	__func__, __LINE__, cmd.cluster_class,
	cmd.cluster_id, cmd.cpu_id, cmd.frequency);

	*rate = cmd.frequency;
	}

	static unsigned long
	clc_recalc_rate(struct clk_hw *hw, unsigned long unused)
	{
	unsigned long rate;

	mhu_cluster_rate(hw, &rate, 1);
	return rate;
	}

	static long
	clc_round_rate(struct clk_hw *hw, unsigned long rate,
	unsigned long *unused)
	{
	return rate;
	}

	static int
	clc_set_rate(struct clk_hw *hw, unsigned long rate,
	unsigned long unused)
	{
	unsigned long res = rate;

	mhu_cluster_rate(hw, &res, 0);

	return (res == rate) ? 0 : -EINVAL;
	}

	static struct clk_ops clk_clc_ops = {
	.recalc_rate = clc_recalc_rate,
	.round_rate = clc_round_rate,
	.set_rate = clc_set_rate,
	};

	static struct clk_hw mb86s7x_clclk_register(struct device cpu_dev)
	{
	struct clk_init_data init;
	struct cl_clk *clc;
	int ret;

	clc = kzalloc(sizeof(*clc), GFP_KERNEL);
	if (!clc)
	return ERR_PTR(-ENOMEM);

	clc->hw.init = &init;
	clc->cluster = topology_physical_package_id(cpu_dev->id);

	init.name = dev_name(cpu_dev);
	init.ops = &clk_clc_ops;
	init.flags = CLK_GET_RATE_NOCACHE;
	init.num_parents = 0;

	ret = devm_clk_hw_register(cpu_dev, &clc->hw);
	if (ret)
	return ERR_PTR(ret);
	return &clc->hw;
	}

	static int mb86s7x_clclk_of_init(void)
	{
	int cpu, ret = -ENODEV;
	struct device_node *np;
	struct clk_hw *hw;

	np = of_find_compatible_node(NULL, NULL, "fujitsu,mb86s70-scb-1.0");
	if (!np \|\| !of_device_is_available(np))
	goto exit;

	for_each_possible_cpu(cpu) {
	struct device *cpu_dev = get_cpu_device(cpu);

	if (!cpu_dev) {
	pr_err("failed to get cpu%d device\n", cpu);
	continue;
	}

	hw = mb86s7x_clclk_register(cpu_dev);
	if (IS_ERR(hw)) {
	pr_err("failed to register cpu%d clock\n", cpu);
	continue;
	}
	if (clk_hw_register_clkdev(hw, NULL, dev_name(cpu_dev))) {
	pr_err("failed to register cpu%d clock lookup\n", cpu);
	continue;
	}
	pr_debug("registered clk for %s\n", dev_name(cpu_dev));
	}
	ret = 0;

	platform_device_register_simple("arm-bL-cpufreq-dt", -1, NULL, 0);
	exit:
	of_node_put(np);
	return ret;
	}
	module_init(mb86s7x_clclk_of_init);