1 // SPDX-License-Identifier: GPL-2.0-only
3 #include <linux/slab.h>
4 #include <linux/bitops.h>
5 #include <linux/regmap.h>
7 #include <linux/clk-provider.h>
10 struct rockchip_muxgrf_clock {
12 struct regmap *regmap;
19 #define to_muxgrf_clock(_hw) container_of(_hw, struct rockchip_muxgrf_clock, hw)
21 static u8 rockchip_muxgrf_get_parent(struct clk_hw *hw)
23 struct rockchip_muxgrf_clock *mux = to_muxgrf_clock(hw);
24 unsigned int mask = GENMASK(mux->width - 1, 0);
27 regmap_read(mux->regmap, mux->reg, &val);
35 static int rockchip_muxgrf_set_parent(struct clk_hw *hw, u8 index)
37 struct rockchip_muxgrf_clock *mux = to_muxgrf_clock(hw);
38 unsigned int mask = GENMASK(mux->width + mux->shift - 1, mux->shift);
44 if (mux->flags & CLK_MUX_HIWORD_MASK)
45 return regmap_write(mux->regmap, mux->reg, val | (mask << 16));
47 return regmap_update_bits(mux->regmap, mux->reg, mask, val);
50 static const struct clk_ops rockchip_muxgrf_clk_ops = {
51 .get_parent = rockchip_muxgrf_get_parent,
52 .set_parent = rockchip_muxgrf_set_parent,
53 .determine_rate = __clk_mux_determine_rate,
56 struct clk *rockchip_clk_register_muxgrf(const char *name,
57 const char *const *parent_names, u8 num_parents,
58 int flags, struct regmap *regmap, int reg,
59 int shift, int width, int mux_flags)
61 struct rockchip_muxgrf_clock *muxgrf_clock;
62 struct clk_init_data init;
66 pr_err("%s: regmap not available\n", __func__);
67 return ERR_PTR(-ENOTSUPP);
70 muxgrf_clock = kmalloc(sizeof(*muxgrf_clock), GFP_KERNEL);
72 return ERR_PTR(-ENOMEM);
76 init.num_parents = num_parents;
77 init.parent_names = parent_names;
78 init.ops = &rockchip_muxgrf_clk_ops;
80 muxgrf_clock->hw.init = &init;
81 muxgrf_clock->regmap = regmap;
82 muxgrf_clock->reg = reg;
83 muxgrf_clock->shift = shift;
84 muxgrf_clock->width = width;
85 muxgrf_clock->flags = mux_flags;
87 clk = clk_register(NULL, &muxgrf_clock->hw);