1 // SPDX-License-Identifier: GPL-2.0-or-later
6  *	Murali Karicheri <m-karicheri2@ti.com>
9 #include <linux/clk-provider.h>
44  * struct clk_psc_data - PSC data
56  * struct clk_psc - PSC clock structure
96 	} while (((ptstat >> domain_id) & 1) && count--);  in psc_config()
101 	} while (!((mdstat & MDSTAT_STATE_MASK) == next_state) && count--);  in psc_config()
107 	struct clk_psc_data *data = psc->psc_data;  in keystone_clk_is_enabled()
108 	u32 mdstat = readl(data->control_base + MDSTAT);  in keystone_clk_is_enabled()
116 	struct clk_psc_data *data = psc->psc_data;  in keystone_clk_enable()
119 	if (psc->lock)  in keystone_clk_enable()
120 		spin_lock_irqsave(psc->lock, flags);  in keystone_clk_enable()
122 	psc_config(data->control_base, data->domain_base,  in keystone_clk_enable()
123 				PSC_STATE_ENABLE, data->domain_id);  in keystone_clk_enable()
125 	if (psc->lock)  in keystone_clk_enable()
126 		spin_unlock_irqrestore(psc->lock, flags);  in keystone_clk_enable()
134 	struct clk_psc_data *data = psc->psc_data;  in keystone_clk_disable()
137 	if (psc->lock)  in keystone_clk_disable()
138 		spin_lock_irqsave(psc->lock, flags);  in keystone_clk_disable()
140 	psc_config(data->control_base, data->domain_base,  in keystone_clk_disable()
141 				PSC_STATE_DISABLE, data->domain_id);  in keystone_clk_disable()
143 	if (psc->lock)  in keystone_clk_disable()
144 		spin_unlock_irqrestore(psc->lock, flags);  in keystone_clk_disable()
154  * clk_register_psc - register psc clock
173 		return ERR_PTR(-ENOMEM);  in clk_register_psc()
181 	psc->psc_data = psc_data;  in clk_register_psc()
182 	psc->lock = lock;  in clk_register_psc()
183 	psc->hw.init = &init;  in clk_register_psc()
185 	clk = clk_register(NULL, &psc->hw);  in clk_register_psc()
193  * of_psc_clk_init - initialize psc clock through DT
199 	const char *clk_name = node->name;  in of_psc_clk_init()
211 	i = of_property_match_string(node, "reg-names", "control");  in of_psc_clk_init()
212 	data->control_base = of_iomap(node, i);  in of_psc_clk_init()
213 	if (!data->control_base) {  in of_psc_clk_init()
218 	i = of_property_match_string(node, "reg-names", "domain");  in of_psc_clk_init()
219 	data->domain_base = of_iomap(node, i);  in of_psc_clk_init()
220 	if (!data->domain_base) {  in of_psc_clk_init()
225 	of_property_read_u32(node, "domain-id", &data->domain_id);  in of_psc_clk_init()
228 	if (!domain_transition_base && !data->domain_id)  in of_psc_clk_init()
229 		domain_transition_base = data->domain_base;  in of_psc_clk_init()
231 	of_property_read_string(node, "clock-output-names", &clk_name);  in of_psc_clk_init()
247 	iounmap(data->domain_base);  in of_psc_clk_init()
249 	iounmap(data->control_base);  in of_psc_clk_init()
256  * of_keystone_psc_clk_init - initialize psc clock through DT
263 CLK_OF_DECLARE(keystone_gate_clk, "ti,keystone,psc-clock",
268 MODULE_AUTHOR("Murali Karicheri <m-karicheri2@ti.com>");