1 /* 2 * Copyright (c) 2013, The Linux Foundation. All rights reserved. 3 * 4 * This software is licensed under the terms of the GNU General Public 5 * License version 2, as published by the Free Software Foundation, and 6 * may be copied, distributed, and modified under those terms. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 */ 13 14 #ifndef __QCOM_CLK_BRANCH_H__ 15 #define __QCOM_CLK_BRANCH_H__ 16 17 #include <linux/clk-provider.h> 18 19 #include "clk-regmap.h" 20 21 /** 22 * struct clk_branch - gating clock with status bit and dynamic hardware gating 23 * 24 * @hwcg_reg: dynamic hardware clock gating register 25 * @hwcg_bit: ORed with @hwcg_reg to enable dynamic hardware clock gating 26 * @halt_reg: halt register 27 * @halt_bit: ANDed with @halt_reg to test for clock halted 28 * @halt_check: type of halt checking to perform 29 * @clkr: handle between common and hardware-specific interfaces 30 * 31 * Clock which can gate its output. 32 */ 33 struct clk_branch { 34 u32 hwcg_reg; 35 u32 halt_reg; 36 u8 hwcg_bit; 37 u8 halt_bit; 38 u8 halt_check; 39 #define BRANCH_VOTED BIT(7) /* Delay on disable */ 40 #define BRANCH_HALT 0 /* pol: 1 = halt */ 41 #define BRANCH_HALT_VOTED (BRANCH_HALT | BRANCH_VOTED) 42 #define BRANCH_HALT_ENABLE 1 /* pol: 0 = halt */ 43 #define BRANCH_HALT_ENABLE_VOTED (BRANCH_HALT_ENABLE | BRANCH_VOTED) 44 #define BRANCH_HALT_DELAY 2 /* No bit to check; just delay */ 45 46 struct clk_regmap clkr; 47 }; 48 49 extern const struct clk_ops clk_branch_ops; 50 extern const struct clk_ops clk_branch2_ops; 51 extern const struct clk_ops clk_branch_simple_ops; 52 53 #define to_clk_branch(_hw) \ 54 container_of(to_clk_regmap(_hw), struct clk_branch, clkr) 55 56 #endif 57