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