// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com>
 */

#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/at91_pmc.h>
#include <of.h>
#include <of_address.h>
#include <mfd/syscon.h>
#include <linux/regmap.h>

#include "pmc.h"

#define PMC_MAX_IDS 128
#define PMC_MAX_PCKS 8

int of_at91_get_clk_range(struct device_node *np, const char *propname,
			  struct clk_range *range)
{
	u32 min, max;
	int ret;

	ret = of_property_read_u32_index(np, propname, 0, &min);
	if (ret)
		return ret;

	ret = of_property_read_u32_index(np, propname, 1, &max);
	if (ret)
		return ret;

	if (range) {
		range->min = min;
		range->max = max;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(of_at91_get_clk_range);

struct clk_hw *of_clk_hw_pmc_get(struct of_phandle_args *clkspec, void *data)
{
	unsigned int type = clkspec->args[0];
	unsigned int idx = clkspec->args[1];
	struct pmc_data *pmc_data = data;

	switch (type) {
	case PMC_TYPE_CORE:
		if (idx < pmc_data->ncore)
			return pmc_data->chws[idx];
		break;
	case PMC_TYPE_SYSTEM:
		if (idx < pmc_data->nsystem)
			return pmc_data->shws[idx];
		break;
	case PMC_TYPE_PERIPHERAL:
		if (idx < pmc_data->nperiph)
			return pmc_data->phws[idx];
		break;
	case PMC_TYPE_GCK:
		if (idx < pmc_data->ngck)
			return pmc_data->ghws[idx];
		break;
	case PMC_TYPE_PROGRAMMABLE:
		if (idx < pmc_data->npck)
			return pmc_data->pchws[idx];
		break;
	default:
		break;
	}

	pr_err("%s: invalid type (%u) or index (%u)\n", __func__, type, idx);

	return ERR_PTR(-EINVAL);
}

struct pmc_data *pmc_data_allocate(unsigned int ncore, unsigned int nsystem,
				   unsigned int nperiph, unsigned int ngck,
				   unsigned int npck)
{
	unsigned int num_clks = ncore + nsystem + nperiph + ngck + npck;
	struct pmc_data *pmc_data;

	pmc_data = kzalloc(struct_size(pmc_data, hwtable, num_clks),
			   GFP_KERNEL);
	if (!pmc_data)
		return NULL;

	pmc_data->ncore = ncore;
	pmc_data->chws = pmc_data->hwtable;

	pmc_data->nsystem = nsystem;
	pmc_data->shws = pmc_data->chws + ncore;

	pmc_data->nperiph = nperiph;
	pmc_data->phws = pmc_data->shws + nsystem;

	pmc_data->ngck = ngck;
	pmc_data->ghws = pmc_data->phws + nperiph;

	pmc_data->npck = npck;
	pmc_data->pchws = pmc_data->ghws + ngck;

	return pmc_data;
}