Commit 609d7558 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: clkfwk: Consolidate div clk registration helper. 



This consolidates the div6/4 versions of the clk registration wrapper.
The existing wrappers with their own sh_clk_ops are maintained for API
compatability, though in the future it should be possible to be rid of
them entirely.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent e3c87607

drivers/sh/clk/cpg.c

+75 −107
Original line number Diff line number Diff line
@@ -162,6 +162,72 @@ static struct sh_clk_ops sh_clk_div_enable_clk_ops = { 
	.disable	= sh_clk_div_disable,

};



static int __init sh_clk_init_parent(struct clk *clk)

{

	u32 val;



	if (clk->parent)

		return 0;



	if (!clk->parent_table || !clk->parent_num)

		return 0;



	if (!clk->src_width) {

		pr_err("sh_clk_init_parent: cannot select parent clock\n");

		return -EINVAL;

	}



	val  = (sh_clk_read(clk) >> clk->src_shift);

	val &= (1 << clk->src_width) - 1;



	if (val >= clk->parent_num) {

		pr_err("sh_clk_init_parent: parent table size failed\n");

		return -EINVAL;

	}



	clk_reparent(clk, clk->parent_table[val]);

	if (!clk->parent) {

		pr_err("sh_clk_init_parent: unable to set parent");

		return -EINVAL;

	}



	return 0;

}



static int __init sh_clk_div_register_ops(struct clk *clks, int nr,

			struct clk_div_table *table, struct sh_clk_ops *ops)

{

	struct clk *clkp;

	void *freq_table;

	int nr_divs = table->div_mult_table->nr_divisors;

	int freq_table_size = sizeof(struct cpufreq_frequency_table);

	int ret = 0;

	int k;



	freq_table_size *= (nr_divs + 1);

	freq_table = kzalloc(freq_table_size * nr, GFP_KERNEL);

	if (!freq_table) {

		pr_err("%s: unable to alloc memory\n", __func__);

		return -ENOMEM;

	}



	for (k = 0; !ret && (k < nr); k++) {

		clkp = clks + k;



		clkp->ops = ops;

		clkp->priv = table;



		clkp->freq_table = freq_table + (k * freq_table_size);

		clkp->freq_table[nr_divs].frequency = CPUFREQ_TABLE_END;



		ret = clk_register(clkp);

		if (ret == 0)

			ret = sh_clk_init_parent(clkp);

	}



	return ret;

}



/*

 * div6 support

 */
@@ -223,81 +289,15 @@ static struct sh_clk_ops sh_clk_div6_reparent_clk_ops = { 
	.set_parent	= sh_clk_div6_set_parent,

};



static int __init sh_clk_init_parent(struct clk *clk)

{

	u32 val;



	if (clk->parent)

		return 0;



	if (!clk->parent_table || !clk->parent_num)

		return 0;



	if (!clk->src_width) {

		pr_err("sh_clk_init_parent: cannot select parent clock\n");

		return -EINVAL;

	}



	val  = (sh_clk_read(clk) >> clk->src_shift);

	val &= (1 << clk->src_width) - 1;



	if (val >= clk->parent_num) {

		pr_err("sh_clk_init_parent: parent table size failed\n");

		return -EINVAL;

	}



	clk_reparent(clk, clk->parent_table[val]);

	if (!clk->parent) {

		pr_err("sh_clk_init_parent: unable to set parent");

		return -EINVAL;

	}



	return 0;

}



static int __init sh_clk_div6_register_ops(struct clk *clks, int nr,

					   struct sh_clk_ops *ops)

{

	struct clk *clkp;

	void *freq_table;

	struct clk_div_table *table = &sh_clk_div6_table;

	int nr_divs = table->div_mult_table->nr_divisors;

	int freq_table_size = sizeof(struct cpufreq_frequency_table);

	int ret = 0;

	int k;



	freq_table_size *= (nr_divs + 1);

	freq_table = kzalloc(freq_table_size * nr, GFP_KERNEL);

	if (!freq_table) {

		pr_err("sh_clk_div6_register: unable to alloc memory\n");

		return -ENOMEM;

	}



	for (k = 0; !ret && (k < nr); k++) {

		clkp = clks + k;



		clkp->ops = ops;

		clkp->priv = table;

		clkp->freq_table = freq_table + (k * freq_table_size);

		clkp->freq_table[nr_divs].frequency = CPUFREQ_TABLE_END;

		ret = clk_register(clkp);

		if (ret < 0)

			break;



		ret = sh_clk_init_parent(clkp);

	}



	return ret;

}



int __init sh_clk_div6_register(struct clk *clks, int nr)

{

	return sh_clk_div6_register_ops(clks, nr, &sh_clk_div_enable_clk_ops);

	return sh_clk_div_register_ops(clks, nr, &sh_clk_div6_table,

				       &sh_clk_div_enable_clk_ops);

}



int __init sh_clk_div6_reparent_register(struct clk *clks, int nr)

{

	return sh_clk_div6_register_ops(clks, nr,

	return sh_clk_div_register_ops(clks, nr, &sh_clk_div6_table,

				       &sh_clk_div6_reparent_clk_ops);

}
@@ -342,54 +342,22 @@ static struct sh_clk_ops sh_clk_div4_reparent_clk_ops = { 
	.set_parent	= sh_clk_div4_set_parent,

};



static int __init sh_clk_div4_register_ops(struct clk *clks, int nr,

			struct clk_div4_table *table, struct sh_clk_ops *ops)

{

	struct clk *clkp;

	void *freq_table;

	int nr_divs = table->div_mult_table->nr_divisors;

	int freq_table_size = sizeof(struct cpufreq_frequency_table);

	int ret = 0;

	int k;



	freq_table_size *= (nr_divs + 1);

	freq_table = kzalloc(freq_table_size * nr, GFP_KERNEL);

	if (!freq_table) {

		pr_err("sh_clk_div4_register: unable to alloc memory\n");

		return -ENOMEM;

	}



	for (k = 0; !ret && (k < nr); k++) {

		clkp = clks + k;



		clkp->ops = ops;

		clkp->priv = table;



		clkp->freq_table = freq_table + (k * freq_table_size);

		clkp->freq_table[nr_divs].frequency = CPUFREQ_TABLE_END;



		ret = clk_register(clkp);

	}



	return ret;

}



int __init sh_clk_div4_register(struct clk *clks, int nr,

				struct clk_div4_table *table)

{

	return sh_clk_div4_register_ops(clks, nr, table, &sh_clk_div_clk_ops);

	return sh_clk_div_register_ops(clks, nr, table, &sh_clk_div_clk_ops);

}



int __init sh_clk_div4_enable_register(struct clk *clks, int nr,

				struct clk_div4_table *table)

{

	return sh_clk_div4_register_ops(clks, nr, table,

	return sh_clk_div_register_ops(clks, nr, table,

				       &sh_clk_div_enable_clk_ops);

}



int __init sh_clk_div4_reparent_register(struct clk *clks, int nr,

				struct clk_div4_table *table)

{

	return sh_clk_div4_register_ops(clks, nr, table,

	return sh_clk_div_register_ops(clks, nr, table,

				       &sh_clk_div4_reparent_clk_ops);

}

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