1 /* 2 * Clock and power management (CPM) abstractions. 3 * 4 * Copyright (C) 2017, 2018, 2020, 2021 Paul Boddie <paul@boddie.org.uk> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA 20 */ 21 22 #pragma once 23 24 #include <l4/devices/clocks.h> 25 #include <l4/sys/types.h> 26 #include <stdint.h> 27 28 29 30 #ifdef __cplusplus 31 32 /* A simple abstraction for accessing the CPM registers. */ 33 34 class Cpm_chip 35 { 36 public: 37 virtual uint32_t get_lcd_pixel_frequency() = 0; 38 39 virtual void set_hdmi_frequency(uint32_t) { } 40 41 virtual void set_lcd_frequencies(uint32_t pclk, uint8_t ratio) = 0; 42 43 virtual int have_clock(enum Clock_identifiers clock) = 0; 44 45 virtual void start_clock(enum Clock_identifiers clock) = 0; 46 47 virtual void stop_clock(enum Clock_identifiers clock) = 0; 48 49 virtual void update_output_frequency() = 0; 50 }; 51 52 #endif /* __cplusplus */