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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2018 Microchip Technology Inc,
* Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
*
*
*/
#include <linux/clk-provider.h>
#include <linux/of.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <soc/at91/atmel-sfr.h>
#include "pmc.h"
struct clk_i2s_mux {
struct clk_hw hw;
struct regmap *regmap;
u8 bus_id;
};
#define to_clk_i2s_mux(hw) container_of(hw, struct clk_i2s_mux, hw)
static u8 clk_i2s_mux_get_parent(struct clk_hw *hw)
{
struct clk_i2s_mux *mux = to_clk_i2s_mux(hw);
u32 val;
regmap_read(mux->regmap, AT91_SFR_I2SCLKSEL, &val);
return (val & BIT(mux->bus_id)) >> mux->bus_id;
}
static int clk_i2s_mux_set_parent(struct clk_hw *hw, u8 index)
{
struct clk_i2s_mux *mux = to_clk_i2s_mux(hw);
return regmap_update_bits(mux->regmap, AT91_SFR_I2SCLKSEL,
BIT(mux->bus_id), index << mux->bus_id);
}
static const struct clk_ops clk_i2s_mux_ops = {
.get_parent = clk_i2s_mux_get_parent,
.set_parent = clk_i2s_mux_set_parent,
.determine_rate = __clk_mux_determine_rate,
};
struct clk_hw * __init
at91_clk_i2s_mux_register(struct regmap *regmap, const char *name,
const char * const *parent_names,
unsigned int num_parents, u8 bus_id)
{
struct clk_init_data init = {};
struct clk_i2s_mux *i2s_ck;
int ret;
i2s_ck = kzalloc(sizeof(*i2s_ck), GFP_KERNEL);
if (!i2s_ck)
return ERR_PTR(-ENOMEM);
init.name = name;
init.ops = &clk_i2s_mux_ops;
init.parent_names = parent_names;
init.num_parents = num_parents;
i2s_ck->hw.init = &init;
i2s_ck->bus_id = bus_id;
i2s_ck->regmap = regmap;
ret = clk_hw_register(NULL, &i2s_ck->hw);
if (ret) {
kfree(i2s_ck);
return ERR_PTR(ret);
}
return &i2s_ck->hw;
}
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