1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (c) 2019 Samsung Electronics Co., Ltd. 4 * http://www.samsung.com/ 5 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com> 6 * 7 * Samsung Exynos SoC Adaptive Supply Voltage support 8 */ 9 #ifndef __LINUX_SOC_EXYNOS_ASV_H 10 #define __LINUX_SOC_EXYNOS_ASV_H 11 12 struct regmap; 13 14 /* HPM, IDS values to select target group */ 15 struct asv_limit_entry { 16 unsigned int hpm; 17 unsigned int ids; 18 }; 19 20 struct exynos_asv_table { 21 unsigned int num_rows; 22 unsigned int num_cols; 23 u32 *buf; 24 }; 25 26 struct exynos_asv_subsys { 27 struct exynos_asv *asv; 28 const char *cpu_dt_compat; 29 int id; 30 struct exynos_asv_table table; 31 32 unsigned int base_volt; 33 unsigned int offset_volt_h; 34 unsigned int offset_volt_l; 35 }; 36 37 struct exynos_asv { 38 struct device *dev; 39 struct regmap *chipid_regmap; 40 struct exynos_asv_subsys subsys[2]; 41 42 int (*opp_get_voltage)(const struct exynos_asv_subsys *subs, 43 int level, unsigned int voltage); 44 unsigned int group; 45 unsigned int table; 46 47 /* True if SG fields from PKG_ID register should be used */ 48 bool use_sg; 49 /* ASV bin read from DT */ 50 int of_bin; 51 }; 52 53 static inline u32 __asv_get_table_entry(const struct exynos_asv_table *table, 54 unsigned int row, unsigned int col) 55 { 56 return table->buf[row * (table->num_cols) + col]; 57 } 58 59 static inline u32 exynos_asv_opp_get_voltage(const struct exynos_asv_subsys *subsys, 60 unsigned int level, unsigned int group) 61 { 62 return __asv_get_table_entry(&subsys->table, level, group + 1); 63 } 64 65 static inline u32 exynos_asv_opp_get_frequency(const struct exynos_asv_subsys *subsys, 66 unsigned int level) 67 { 68 return __asv_get_table_entry(&subsys->table, level, 0); 69 } 70 71 int exynos_asv_init(struct device *dev, struct regmap *regmap); 72 73 #endif /* __LINUX_SOC_EXYNOS_ASV_H */ 74