| 1 | |
| 2 | |
| 3 | * TI Fixed Factor Clock
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| 4 | *
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| 5 | * Copyright (C) 2013 Texas Instruments, Inc.
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| 6 | *
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| 7 | * Tero Kristo <[email protected]>
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| 8 |
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| 9 |
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| 10 | #include <linux/clk-provider.h>
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| 11 | #include <linux/slab.h>
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| 12 | #include <linux/err.h>
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| 13 | #include <linux/of.h>
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| 14 | #include <linux/of_address.h>
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| 15 | #include <linux/clk/ti.h>
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| 16 |
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| 17 | #include "clock.h"
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| 18 |
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| 19 | #undef pr_fmt
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| 20 | #define pr_fmt(fmt) "%s: " fmt, __func__
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| 21 |
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| 22 | |
| 23 | * of_ti_fixed_factor_clk_setup - Setup function for TI fixed factor clock
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| 24 | * @node: device node for this clock
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| 25 | *
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| 26 | * Sets up a simple fixed factor clock based on device tree info.
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| 27 |
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| 28 | static void __init of_ti_fixed_factor_clk_setup(struct device_node *node)
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| 29 | {
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| 30 | struct clk *clk;
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| 31 | const char *clk_name = ti_dt_clk_name(node);
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| 32 | const char *parent_name;
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| 33 | u32 div, mult;
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| 34 | u32 flags = 0;
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| 35 |
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| 36 | if (of_property_read_u32(node, "ti,clock-div", &div)) {
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| 37 | pr_err("%pOFn must have a clock-div property\n", node);
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| 38 | return;
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| 39 | }
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| 40 |
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| 41 | if (of_property_read_u32(node, "ti,clock-mult", &mult)) {
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| 42 | pr_err("%pOFn must have a clock-mult property\n", node);
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| 43 | return;
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| 44 | }
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| 45 |
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| 46 | if (of_property_read_bool(node, "ti,set-rate-parent"))
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| 47 | flags |= CLK_SET_RATE_PARENT;
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| 48 |
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| 49 | parent_name = of_clk_get_parent_name(node, 0);
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| 50 |
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| 51 | clk = clk_register_fixed_factor(NULL, clk_name, parent_name, flags,
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| 52 | mult, div);
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| 53 |
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| 54 | if (!IS_ERR(clk)) {
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| 55 | of_clk_add_provider(node, of_clk_src_simple_get, clk);
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| 56 | of_ti_clk_autoidle_setup(node);
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| 57 | ti_clk_add_alias(clk, clk_name);
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| 58 | }
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| 59 | }
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| 60 | CLK_OF_DECLARE(ti_fixed_factor_clk, "ti,fixed-factor-clock",
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| 61 | of_ti_fixed_factor_clk_setup);
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