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