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62 lines
1.4 KiB
62 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright 2013 Emilio López |
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* |
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* Emilio López <[email protected]> |
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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/of_address.h> |
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#include <linux/slab.h> |
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#define SUNXI_OSC24M_GATE 0 |
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static DEFINE_SPINLOCK(hosc_lock); |
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static void __init sun4i_osc_clk_setup(struct device_node *node) |
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{ |
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struct clk *clk; |
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struct clk_fixed_rate *fixed; |
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struct clk_gate *gate; |
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const char *clk_name = node->name; |
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u32 rate; |
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if (of_property_read_u32(node, "clock-frequency", &rate)) |
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return; |
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/* allocate fixed-rate and gate clock structs */ |
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fixed = kzalloc(sizeof(struct clk_fixed_rate), GFP_KERNEL); |
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if (!fixed) |
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return; |
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gate = kzalloc(sizeof(struct clk_gate), GFP_KERNEL); |
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if (!gate) |
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goto err_free_fixed; |
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of_property_read_string(node, "clock-output-names", &clk_name); |
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/* set up gate and fixed rate properties */ |
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gate->reg = of_iomap(node, 0); |
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gate->bit_idx = SUNXI_OSC24M_GATE; |
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gate->lock = &hosc_lock; |
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fixed->fixed_rate = rate; |
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clk = clk_register_composite(NULL, clk_name, |
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NULL, 0, |
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NULL, NULL, |
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&fixed->hw, &clk_fixed_rate_ops, |
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&gate->hw, &clk_gate_ops, 0); |
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if (IS_ERR(clk)) |
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goto err_free_gate; |
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of_clk_add_provider(node, of_clk_src_simple_get, clk); |
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return; |
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err_free_gate: |
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kfree(gate); |
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err_free_fixed: |
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kfree(fixed); |
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} |
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CLK_OF_DECLARE(sun4i_osc, "allwinner,sun4i-a10-osc-clk", sun4i_osc_clk_setup);
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