src/devices/clock/drivers/amlogic-clk/aml-clk-blocks.h

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SRC_DEVICES_CLOCK_DRIVERS_AMLOGIC_CLK_AML_CLK_BLOCKS_H_
#define SRC_DEVICES_CLOCK_DRIVERS_AMLOGIC_CLK_AML_CLK_BLOCKS_H_

#include <zircon/types.h>

// MMIO ranges that can contain clock gates.
enum meson_register_sets {
  // HIU is the default set of registers.
  kMesonRegisterSetHiu = 0,
  kMesonRegisterSetDos,
};

typedef struct meson_clk_gate {
  uint32_t reg;           // Offset from Clock Base Addr in bytes.
  uint32_t bit;           // Offset into this register.
  uint32_t register_set;  // Index determining which set of registers the clock belongs to.
  uint32_t mask;          // If this is nonzero, |bit| is ignored and this mask is used instead.
} meson_clk_gate_t;

typedef struct meson_clk_msr {
  uint32_t reg0_offset;  // Offset of MSR_CLK_REG0 from MSR_CLK Base Addr
  uint32_t reg2_offset;  // Offset of MSR_CLK_REG2 from MSR_CLK Base Addr
} meson_clk_msr_t;

typedef struct meson_clk_mux {
  uint32_t reg;            // Offset from Clock Base in bytes.
  uint32_t mask;           // Right Justified Mask of the mux selection bits.
  uint32_t shift;          // Offset of the Mux input index in the register in bits.
  uint32_t n_inputs;       // Number of possible inputs to select from.
  const uint32_t *inputs;  // If set, this field maps indicies to mux selection values
                           // since indices must always be in the range [0, n_inputs).
} meson_clk_mux_t;

typedef struct meson_cpu_clk {
  uint32_t reg;
  hhi_plls_t pll;
  uint32_t initial_hz;
} meson_cpu_clk_t;

#endif  // SRC_DEVICES_CLOCK_DRIVERS_AMLOGIC_CLK_AML_CLK_BLOCKS_H_