a58009dc6f
We hardcode some clocks to be always-on, as they're essential to the functioning of the SoC / some peripherals. Add a helper to do so to make the writes less magic. Reviewed-by: Johan Hovold <johan+linaro@kernel.org> Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org> Link: https://lore.kernel.org/r/20240212-topic-clk_branch_en-v7-1-5b79eb7278b2@linaro.org Signed-off-by: Bjorn Andersson <andersson@kernel.org>
120 lines
3.7 KiB
C
120 lines
3.7 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/bitfield.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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/**
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* struct clk_mem_branch - gating clock which are associated with memories
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*
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* @mem_enable_reg: branch clock memory gating register
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* @mem_ack_reg: branch clock memory ack register
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* @mem_enable_ack_mask: branch clock memory enable and ack field in @mem_ack_reg
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* @branch: branch clock gating handle
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*
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* Clock which can gate its memories.
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*/
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struct clk_mem_branch {
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u32 mem_enable_reg;
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u32 mem_ack_reg;
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u32 mem_enable_ack_mask;
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struct clk_branch branch;
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};
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/* Branch clock common bits for HLOS-owned clocks */
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#define CBCR_CLK_OFF BIT(31)
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#define CBCR_NOC_FSM_STATUS GENMASK(30, 28)
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#define FSM_STATUS_ON BIT(1)
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#define CBCR_FORCE_MEM_CORE_ON BIT(14)
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#define CBCR_FORCE_MEM_PERIPH_ON BIT(13)
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#define CBCR_FORCE_MEM_PERIPH_OFF BIT(12)
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#define CBCR_WAKEUP GENMASK(11, 8)
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#define CBCR_SLEEP GENMASK(7, 4)
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#define CBCR_CLOCK_ENABLE BIT(0)
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static inline void qcom_branch_set_force_mem_core(struct regmap *regmap,
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struct clk_branch clk, bool on)
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{
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regmap_update_bits(regmap, clk.halt_reg, CBCR_FORCE_MEM_CORE_ON,
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on ? CBCR_FORCE_MEM_CORE_ON : 0);
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}
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static inline void qcom_branch_set_force_periph_on(struct regmap *regmap,
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struct clk_branch clk, bool on)
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{
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regmap_update_bits(regmap, clk.halt_reg, CBCR_FORCE_MEM_PERIPH_ON,
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on ? CBCR_FORCE_MEM_PERIPH_ON : 0);
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}
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static inline void qcom_branch_set_force_periph_off(struct regmap *regmap,
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struct clk_branch clk, bool on)
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{
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regmap_update_bits(regmap, clk.halt_reg, CBCR_FORCE_MEM_PERIPH_OFF,
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on ? CBCR_FORCE_MEM_PERIPH_OFF : 0);
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}
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static inline void qcom_branch_set_wakeup(struct regmap *regmap, struct clk_branch clk, u32 val)
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{
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regmap_update_bits(regmap, clk.halt_reg, CBCR_WAKEUP,
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FIELD_PREP(CBCR_WAKEUP, val));
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}
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static inline void qcom_branch_set_sleep(struct regmap *regmap, struct clk_branch clk, u32 val)
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{
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regmap_update_bits(regmap, clk.halt_reg, CBCR_SLEEP,
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FIELD_PREP(CBCR_SLEEP, val));
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}
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static inline void qcom_branch_set_clk_en(struct regmap *regmap, u32 cbcr)
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{
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regmap_update_bits(regmap, cbcr, CBCR_CLOCK_ENABLE, CBCR_CLOCK_ENABLE);
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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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extern const struct clk_ops clk_branch2_mem_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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#define to_clk_mem_branch(_hw) \
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container_of(to_clk_branch(_hw), struct clk_mem_branch, branch)
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#endif
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