linux/drivers/clk/qcom/clk-branch.h
Bjorn Andersson 360fed4228 clk: qcom: branch: Add AON clock ops
Some clocks can only be turned on by resetting the block containing
them, provide a clock type that allow us to reference these clocks and
have the client drivers enable and "disable" them.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-04-11 13:34:21 -07:00

49 lines
1.5 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2013, The Linux Foundation. All rights reserved. */
#ifndef __QCOM_CLK_BRANCH_H__
#define __QCOM_CLK_BRANCH_H__
#include <linux/clk-provider.h>
#include "clk-regmap.h"
/**
* struct clk_branch - gating clock with status bit and dynamic hardware gating
*
* @hwcg_reg: dynamic hardware clock gating register
* @hwcg_bit: ORed with @hwcg_reg to enable dynamic hardware clock gating
* @halt_reg: halt register
* @halt_bit: ANDed with @halt_reg to test for clock halted
* @halt_check: type of halt checking to perform
* @clkr: handle between common and hardware-specific interfaces
*
* Clock which can gate its output.
*/
struct clk_branch {
u32 hwcg_reg;
u32 halt_reg;
u8 hwcg_bit;
u8 halt_bit;
u8 halt_check;
#define BRANCH_VOTED BIT(7) /* Delay on disable */
#define BRANCH_HALT 0 /* pol: 1 = halt */
#define BRANCH_HALT_VOTED (BRANCH_HALT | BRANCH_VOTED)
#define BRANCH_HALT_ENABLE 1 /* pol: 0 = halt */
#define BRANCH_HALT_ENABLE_VOTED (BRANCH_HALT_ENABLE | BRANCH_VOTED)
#define BRANCH_HALT_DELAY 2 /* No bit to check; just delay */
#define BRANCH_HALT_SKIP 3 /* Don't check halt bit */
struct clk_regmap clkr;
};
extern const struct clk_ops clk_branch_ops;
extern const struct clk_ops clk_branch2_ops;
extern const struct clk_ops clk_branch_simple_ops;
extern const struct clk_ops clk_branch2_aon_ops;
#define to_clk_branch(_hw) \
container_of(to_clk_regmap(_hw), struct clk_branch, clkr)
#endif