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  */
  23 struct 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
  40 extern const struct clk_ops clk_branch_ops;
  41 extern const struct clk_ops clk_branch2_ops;
  42 extern const struct clk_ops clk_branch_simple_ops;
  43 extern 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