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.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 udevice *dev) 20 { 21 return to_clk_fixed_rate(dev)->fixed_rate; 22 } 23 24 static ulong clk_fixed_rate_get_periph_rate(struct udevice *dev, int periph) 25 { 26 return clk_fixed_rate_get_rate(dev); 27 } 28 29 const struct clk_ops clk_fixed_rate_ops = { 30 .get_rate = clk_fixed_rate_get_rate, 31 .get_periph_rate = clk_fixed_rate_get_periph_rate, 32 }; 33 34 static int clk_fixed_rate_ofdata_to_platdata(struct udevice *dev) 35 { 36 to_clk_fixed_rate(dev)->fixed_rate = 37 fdtdec_get_int(gd->fdt_blob, dev->of_offset, 38 "clock-frequency", 0); 39 40 return 0; 41 } 42 43 static const struct udevice_id clk_fixed_rate_match[] = { 44 { 45 .compatible = "fixed-clock", 46 }, 47 { /* sentinel */ } 48 }; 49 50 U_BOOT_DRIVER(clk_fixed_rate) = { 51 .name = "fixed_rate_clock", 52 .id = UCLASS_CLK, 53 .of_match = clk_fixed_rate_match, 54 .ofdata_to_platdata = clk_fixed_rate_ofdata_to_platdata, 55 .platdata_auto_alloc_size = sizeof(struct clk_fixed_rate), 56 .ops = &clk_fixed_rate_ops, 57 }; 58