// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2022, Linaro Ltd. */ #include <linux/clk-provider.h> #include <linux/bitfield.h> #include <linux/regmap.h> #include <linux/export.h> #include "clk-regmap.h" #include "clk-regmap-phy-mux.h" #define PHY_MUX_MASK GENMASK(1, 0) #define PHY_MUX_PHY_SRC 0 #define PHY_MUX_REF_SRC 2 static inline struct clk_regmap_phy_mux *to_clk_regmap_phy_mux(struct clk_regmap *clkr) { return container_of(clkr, struct clk_regmap_phy_mux, clkr); } static int phy_mux_is_enabled(struct clk_hw *hw) { struct clk_regmap *clkr = to_clk_regmap(hw); struct clk_regmap_phy_mux *phy_mux = to_clk_regmap_phy_mux(clkr); unsigned int val; regmap_read(clkr->regmap, phy_mux->reg, &val); val = FIELD_GET(PHY_MUX_MASK, val); WARN_ON(val != PHY_MUX_PHY_SRC && val != PHY_MUX_REF_SRC); return val == PHY_MUX_PHY_SRC; } static int phy_mux_enable(struct clk_hw *hw) { struct clk_regmap *clkr = to_clk_regmap(hw); struct clk_regmap_phy_mux *phy_mux = to_clk_regmap_phy_mux(clkr); return regmap_update_bits(clkr->regmap, phy_mux->reg, PHY_MUX_MASK, FIELD_PREP(PHY_MUX_MASK, PHY_MUX_PHY_SRC)); } static void phy_mux_disable(struct clk_hw *hw) { struct clk_regmap *clkr = to_clk_regmap(hw); struct clk_regmap_phy_mux *phy_mux = to_clk_regmap_phy_mux(clkr); regmap_update_bits(clkr->regmap, phy_mux->reg, PHY_MUX_MASK, FIELD_PREP(PHY_MUX_MASK, PHY_MUX_REF_SRC)); } const struct clk_ops clk_regmap_phy_mux_ops = { .enable = phy_mux_enable, .disable = phy_mux_disable, .is_enabled = phy_mux_is_enabled, }; EXPORT_SYMBOL_GPL(clk_regmap_phy_mux_ops);