1 // SPDX-License-Identifier: GPL-2.0+
3  * Texas Instruments System Control Interface (TI SCI) clock driver
5  * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
8  * Loosely based on Linux kernel sci-clk.c...
14 #include <clk-uclass.h>
18  * struct ti_sci_clk_data - clock controller information structure
19  * @sci: TI SCI handle used for communication with system controller
22 	const struct ti_sci_handle *sci;  member
25 static int ti_sci_clk_probe(struct udevice *dev)  in ti_sci_clk_probe()  argument
27 	struct ti_sci_clk_data *data = dev_get_priv(dev);  in ti_sci_clk_probe()
29 	debug("%s(dev=%p)\n", __func__, dev);  in ti_sci_clk_probe()
32 		return -ENOMEM;  in ti_sci_clk_probe()
35 	data->sci = ti_sci_get_handle(dev);  in ti_sci_clk_probe()
36 	if (IS_ERR(data->sci))  in ti_sci_clk_probe()
37 		return PTR_ERR(data->sci);  in ti_sci_clk_probe()
45 	debug("%s(clk=%p, args_count=%d)\n", __func__, clk, args->args_count);  in ti_sci_clk_of_xlate()
47 	if (args->args_count != 2) {  in ti_sci_clk_of_xlate()
48 		debug("Invalid args_count: %d\n", args->args_count);  in ti_sci_clk_of_xlate()
49 		return -EINVAL;  in ti_sci_clk_of_xlate()
53 	 * On TI SCI-based devices, the clock provider id field is used as a  in ti_sci_clk_of_xlate()
54 	 * device ID, and the data field is used as the associated sub-ID.  in ti_sci_clk_of_xlate()
56 	clk->id = args->args[0];  in ti_sci_clk_of_xlate()
57 	clk->data = args->args[1];  in ti_sci_clk_of_xlate()
76 	struct ti_sci_clk_data *data = dev_get_priv(clk->dev);  in ti_sci_clk_get_rate()
77 	const struct ti_sci_handle *sci = data->sci;  in ti_sci_clk_get_rate()  local
78 	const struct ti_sci_clk_ops *cops = &sci->ops.clk_ops;  in ti_sci_clk_get_rate()
84 	ret = cops->get_freq(sci, clk->id, clk->data, &current_freq);  in ti_sci_clk_get_rate()
86 		dev_err(clk->dev, "%s: get_freq failed (%d)\n", __func__, ret);  in ti_sci_clk_get_rate()
97 	struct ti_sci_clk_data *data = dev_get_priv(clk->dev);  in ti_sci_clk_set_rate()
98 	const struct ti_sci_handle *sci = data->sci;  in ti_sci_clk_set_rate()  local
99 	const struct ti_sci_clk_ops *cops = &sci->ops.clk_ops;  in ti_sci_clk_set_rate()
105 	ret = cops->set_freq(sci, clk->id, clk->data, rate, rate, rate);  in ti_sci_clk_set_rate()
107 		dev_err(clk->dev, "%s: set_freq failed (%d)\n", __func__, ret);  in ti_sci_clk_set_rate()
114 	struct ti_sci_clk_data *data = dev_get_priv(clk->dev);  in ti_sci_clk_set_parent()
115 	const struct ti_sci_handle *sci = data->sci;  in ti_sci_clk_set_parent()  local
116 	const struct ti_sci_clk_ops *cops = &sci->ops.clk_ops;  in ti_sci_clk_set_parent()
123 	/* Make sure the clock parent is valid for a given device ID */  in ti_sci_clk_set_parent()
124 	if (clk->id != parent->id)  in ti_sci_clk_set_parent()
125 		return -EINVAL;  in ti_sci_clk_set_parent()
128 	ret = cops->get_num_parents(sci, clk->id, clk->data, &num_parents);  in ti_sci_clk_set_parent()
130 		dev_err(clk->dev, "%s: get_num_parents failed (%d)\n",  in ti_sci_clk_set_parent()
135 		dev_err(clk->dev, "%s: clock has no settable parents!\n",  in ti_sci_clk_set_parent()
137 		return -EINVAL;  in ti_sci_clk_set_parent()
140 	/* Make sure parent clock ID is valid */  in ti_sci_clk_set_parent()
141 	parent_cid = parent->data - clk->data - 1;  in ti_sci_clk_set_parent()
143 		dev_err(clk->dev, "%s: invalid parent clock!\n", __func__);  in ti_sci_clk_set_parent()
144 		return -EINVAL;  in ti_sci_clk_set_parent()
148 	ret = cops->set_parent(sci, clk->id, clk->data, parent->data);  in ti_sci_clk_set_parent()
150 		dev_err(clk->dev, "%s: set_parent failed (%d)\n", __func__,  in ti_sci_clk_set_parent()
158 	struct ti_sci_clk_data *data = dev_get_priv(clk->dev);  in ti_sci_clk_enable()
159 	const struct ti_sci_handle *sci = data->sci;  in ti_sci_clk_enable()  local
160 	const struct ti_sci_clk_ops *cops = &sci->ops.clk_ops;  in ti_sci_clk_enable()
169 	ret = cops->put_clock(sci, clk->id, clk->data);  in ti_sci_clk_enable()
171 		dev_err(clk->dev, "%s: put_clock failed (%d)\n", __func__, ret);  in ti_sci_clk_enable()
178 	struct ti_sci_clk_data *data = dev_get_priv(clk->dev);  in ti_sci_clk_disable()
179 	const struct ti_sci_handle *sci = data->sci;  in ti_sci_clk_disable()  local
180 	const struct ti_sci_clk_ops *cops = &sci->ops.clk_ops;  in ti_sci_clk_disable()
186 	ret = cops->idle_clock(sci, clk->id, clk->data);  in ti_sci_clk_disable()
188 		dev_err(clk->dev, "%s: idle_clock failed (%d)\n", __func__,  in ti_sci_clk_disable()
195 	{ .compatible = "ti,k2g-sci-clk" },
211 	.name = "ti-sci-clk",
212 	.id = UCLASS_CLK,