drivers/soc/samsung/exynos-asv.h

   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 #endif /* __LINUX_SOC_EXYNOS_ASV_H */