LXR linux/drivers/clk/qcom/clk-branch.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* Copyright (c) 2013, The Linux Foundation. All rights reserved. */
   3
   4#ifndef __QCOM_CLK_BRANCH_H__
   5#define __QCOM_CLK_BRANCH_H__
   6
   7#include <linux/clk-provider.h>
   8
   9#include "clk-regmap.h"
  10
  11/**
  12 * struct clk_branch - gating clock with status bit and dynamic hardware gating
  13 *
  14 * @hwcg_reg: dynamic hardware clock gating register
  15 * @hwcg_bit: ORed with @hwcg_reg to enable dynamic hardware clock gating
  16 * @halt_reg: halt register
  17 * @halt_bit: ANDed with @halt_reg to test for clock halted
  18 * @halt_check: type of halt checking to perform
  19 * @clkr: handle between common and hardware-specific interfaces
  20 *
  21 * Clock which can gate its output.
  22 */
  23struct clk_branch {
  24        u32     hwcg_reg;
  25        u32     halt_reg;
  26        u8      hwcg_bit;
  27        u8      halt_bit;
  28        u8      halt_check;
  29#define BRANCH_VOTED                    BIT(7) /* Delay on disable */
  30#define BRANCH_HALT                     0 /* pol: 1 = halt */
  31#define BRANCH_HALT_VOTED               (BRANCH_HALT | BRANCH_VOTED)
  32#define BRANCH_HALT_ENABLE              1 /* pol: 0 = halt */
  33#define BRANCH_HALT_ENABLE_VOTED        (BRANCH_HALT_ENABLE | BRANCH_VOTED)
  34#define BRANCH_HALT_DELAY               2 /* No bit to check; just delay */
  35#define BRANCH_HALT_SKIP                3 /* Don't check halt bit */
  36
  37        struct clk_regmap clkr;
  38};
  39
  40extern const struct clk_ops clk_branch_ops;
  41extern const struct clk_ops clk_branch2_ops;
  42extern const struct clk_ops clk_branch_simple_ops;
  43extern const struct clk_ops clk_branch2_aon_ops;
  44
  45#define to_clk_branch(_hw) \
  46        container_of(to_clk_regmap(_hw), struct clk_branch, clkr)
  47
  48#endif
  49