linuxdebug/drivers/clk/qcom/clk-regmap-phy-mux.h

34 lines
999 B
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2022, Linaro Ltd.
*/
#ifndef __QCOM_CLK_REGMAP_PHY_MUX_H__
#define __QCOM_CLK_REGMAP_PHY_MUX_H__
#include "clk-regmap.h"
/*
* A clock implementation for PHY pipe and symbols clock muxes.
*
* If the clock is running off the from-PHY source, report it as enabled.
* Report it as disabled otherwise (if it uses reference source).
*
* This way the PHY will disable the pipe clock before turning off the GDSC,
* which in turn would lead to disabling corresponding pipe_clk_src (and thus
* it being parked to a safe, reference clock source). And vice versa, after
* enabling the GDSC the PHY will enable the pipe clock, which would cause
* pipe_clk_src to be switched from a safe source to the working one.
*
* For some platforms this should be used for the UFS symbol_clk_src clocks
* too.
*/
struct clk_regmap_phy_mux {
u32 reg;
struct clk_regmap clkr;
};
extern const struct clk_ops clk_regmap_phy_mux_ops;
#endif