drivers/clk/meson/gxbb-aoclk-regmap.c

   1 /*
   2  * Copyright (c) 2017 BayLibre, SAS.
   3  * Author: Neil Armstrong <narmstrong@baylibre.com>
   4  *
   5  * SPDX-License-Identifier: GPL-2.0+
   6  */
   7
   8 #include <linux/clk-provider.h>
   9 #include <linux/bitfield.h>
  10 #include <linux/regmap.h>
  11 #include "gxbb-aoclk.h"
  12
  13 static int aoclk_gate_regmap_enable(struct clk_hw *hw)
  14 {
  15         struct aoclk_gate_regmap *gate = to_aoclk_gate_regmap(hw);
  16
  17         return regmap_update_bits(gate->regmap, AO_RTI_GEN_CNTL_REG0,
  18                                   BIT(gate->bit_idx), BIT(gate->bit_idx));
  19 }
  20
  21 static void aoclk_gate_regmap_disable(struct clk_hw *hw)
  22 {
  23         struct aoclk_gate_regmap *gate = to_aoclk_gate_regmap(hw);
  24
  25         regmap_update_bits(gate->regmap, AO_RTI_GEN_CNTL_REG0,
  26                            BIT(gate->bit_idx), 0);
  27 }
  28
  29 static int aoclk_gate_regmap_is_enabled(struct clk_hw *hw)
  30 {
  31         struct aoclk_gate_regmap *gate = to_aoclk_gate_regmap(hw);
  32         unsigned int val;
  33         int ret;
  34
  35         ret = regmap_read(gate->regmap, AO_RTI_GEN_CNTL_REG0, &val);
  36         if (ret)
  37                 return ret;
  38
  39         return (val & BIT(gate->bit_idx)) != 0;
  40 }
  41
  42 const struct clk_ops meson_aoclk_gate_regmap_ops = {
  43         .enable = aoclk_gate_regmap_enable,
  44         .disable = aoclk_gate_regmap_disable,
  45         .is_enabled = aoclk_gate_regmap_is_enabled,
  46 };