1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * TI Fixed Factor Clock 4 * 5 * Copyright (C) 2013 Texas Instruments, Inc. 6 * 7 * Tero Kristo <t-kristo@ti.com> 8 */ 9 10 #include <linux/clk-provider.h> 11 #include <linux/slab.h> 12 #include <linux/err.h> 13 #include <linux/of.h> 14 #include <linux/of_address.h> 15 #include <linux/clk/ti.h> 16 17 #include "clock.h" 18 19 #undef pr_fmt 20 #define pr_fmt(fmt) "%s: " fmt, __func__ 21 22 /** 23 * of_ti_fixed_factor_clk_setup - Setup function for TI fixed factor clock 24 * @node: device node for this clock 25 * 26 * Sets up a simple fixed factor clock based on device tree info. 27 */ 28 static void __init of_ti_fixed_factor_clk_setup(struct device_node *node) 29 { 30 struct clk *clk; 31 const char *clk_name = ti_dt_clk_name(node); 32 const char *parent_name; 33 u32 div, mult; 34 u32 flags = 0; 35 36 if (of_property_read_u32(node, "ti,clock-div", &div)) { 37 pr_err("%pOFn must have a clock-div property\n", node); 38 return; 39 } 40 41 if (of_property_read_u32(node, "ti,clock-mult", &mult)) { 42 pr_err("%pOFn must have a clock-mult property\n", node); 43 return; 44 } 45 46 if (of_property_read_bool(node, "ti,set-rate-parent")) 47 flags |= CLK_SET_RATE_PARENT; 48 49 parent_name = of_clk_get_parent_name(node, 0); 50 51 clk = clk_register_fixed_factor(NULL, clk_name, parent_name, flags, 52 mult, div); 53 54 if (!IS_ERR(clk)) { 55 of_clk_add_provider(node, of_clk_src_simple_get, clk); 56 of_ti_clk_autoidle_setup(node); 57 ti_clk_add_alias(NULL, clk, clk_name); 58 } 59 } 60 CLK_OF_DECLARE(ti_fixed_factor_clk, "ti,fixed-factor-clock", 61 of_ti_fixed_factor_clk_setup); 62