1 /* 2 * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <clk-uclass.h> 9 #include <dm/device.h> 10 11 DECLARE_GLOBAL_DATA_PTR; 12 13 struct clk_fixed_rate { 14 unsigned long fixed_rate; 15 }; 16 17 #define to_clk_fixed_rate(dev) ((struct clk_fixed_rate *)dev_get_platdata(dev)) 18 19 static ulong clk_fixed_rate_get_rate(struct clk *clk) 20 { 21 if (clk->id != 0) 22 return -EINVAL; 23 24 return to_clk_fixed_rate(clk->dev)->fixed_rate; 25 } 26 27 const struct clk_ops clk_fixed_rate_ops = { 28 .get_rate = clk_fixed_rate_get_rate, 29 }; 30 31 static int clk_fixed_rate_ofdata_to_platdata(struct udevice *dev) 32 { 33 #if !CONFIG_IS_ENABLED(OF_PLATDATA) 34 to_clk_fixed_rate(dev)->fixed_rate = 35 fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), 36 "clock-frequency", 0); 37 #endif 38 39 return 0; 40 } 41 42 static const struct udevice_id clk_fixed_rate_match[] = { 43 { 44 .compatible = "fixed-clock", 45 }, 46 { /* sentinel */ } 47 }; 48 49 U_BOOT_DRIVER(clk_fixed_rate) = { 50 .name = "fixed_rate_clock", 51 .id = UCLASS_CLK, 52 .of_match = clk_fixed_rate_match, 53 .ofdata_to_platdata = clk_fixed_rate_ofdata_to_platdata, 54 .platdata_auto_alloc_size = sizeof(struct clk_fixed_rate), 55 .ops = &clk_fixed_rate_ops, 56 }; 57