clk/keystone/syscon-clk.c

1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (C) 2020 Texas Instruments Incorporated - https://www.ti.com/
6 #include <linux/clk-provider.h>
37 	return regmap_write_bits(priv->regmap, priv->reg, priv->idx,  in ti_syscon_gate_clk_enable()
38 				 priv->idx);  in ti_syscon_gate_clk_enable()
45 	regmap_write_bits(priv->regmap, priv->reg, priv->idx, 0);  in ti_syscon_gate_clk_disable()
53 	regmap_read(priv->regmap, priv->reg, &val);  in ti_syscon_gate_clk_is_enabled()
55 	return !!(val & priv->idx);  in ti_syscon_gate_clk_is_enabled()
76 		return ERR_PTR(-ENOMEM);  in ti_syscon_gate_clk_register()
80 		name = kasprintf(GFP_KERNEL, "%s:%s", data->name, parent_name);  in ti_syscon_gate_clk_register()
86 		init.name = data->name;  in ti_syscon_gate_clk_register()
92 	priv->regmap = regmap;  in ti_syscon_gate_clk_register()
93 	priv->reg = data->offset;  in ti_syscon_gate_clk_register()
94 	priv->idx = BIT(data->bit_idx);  in ti_syscon_gate_clk_register()
95 	priv->hw.init = &init;  in ti_syscon_gate_clk_register()
97 	ret = devm_clk_hw_register(dev, &priv->hw);  in ti_syscon_gate_clk_register()
105 	return &priv->hw;  in ti_syscon_gate_clk_register()
112 	struct device *dev = &pdev->dev;  in ti_syscon_gate_clk_probe()
119 		return -EINVAL;  in ti_syscon_gate_clk_probe()
121 	regmap = device_node_to_regmap(dev->of_node);  in ti_syscon_gate_clk_probe()
127 	for (p = data; p->name; p++)  in ti_syscon_gate_clk_probe()
130 	num_parents = of_clk_get_parent_count(dev->of_node);  in ti_syscon_gate_clk_probe()
131 	if (of_device_is_compatible(dev->of_node, "ti,am62-audio-refclk") &&  in ti_syscon_gate_clk_probe()
133 		return dev_err_probe(dev, -EINVAL,  in ti_syscon_gate_clk_probe()
140 		return -ENOMEM;  in ti_syscon_gate_clk_probe()
142 	hw_data->num = num_clks;  in ti_syscon_gate_clk_probe()
144 	parent_name = of_clk_get_parent_name(dev->of_node, 0);  in ti_syscon_gate_clk_probe()
146 		hw_data->hws[i] = ti_syscon_gate_clk_register(dev, regmap,  in ti_syscon_gate_clk_probe()
149 		if (IS_ERR(hw_data->hws[i]))  in ti_syscon_gate_clk_probe()
156 						   hw_data->hws[0]);  in ti_syscon_gate_clk_probe()
204 		.compatible = "ti,am654-ehrpwm-tbclk",
208 		.compatible = "ti,am64-epwm-tbclk",
212 		.compatible = "ti,am62-epwm-tbclk",
216 		.compatible = "ti,am62-audio-refclk",
226 		.name = "ti-syscon-gate-clk",
233 MODULE_DESCRIPTION("Syscon backed gate-clock driver");