1 // SPDX-License-Identifier: GPL-2.0-or-later
5  * Copyright (c) 2011-2013 Xilinx Inc.
18 #define SLCR_A9_CPU_RST_CTRL_OFFSET	0x244 /* CPU Software Reset Control */
33  * zynq_slcr_write - Write to a register in SLCR block
46  * zynq_slcr_read - Read a register in SLCR block
48  * @val:	Pointer to value to be read from SLCR
59  * zynq_slcr_unlock - Unlock SLCR registers
71  * zynq_slcr_get_device_id - Read device code id
87  * zynq_slcr_system_restart - Restart the entire system.
103 	 * the FSBL not loading the bitstream after soft-reboot  in zynq_slcr_system_restart()
118  * zynq_slcr_cpu_start - Start cpu
119  * @cpu:	cpu number
121 void zynq_slcr_cpu_start(int cpu)  in zynq_slcr_cpu_start()  argument
126 	reg &= ~(SLCR_A9_CPU_RST << cpu);  in zynq_slcr_cpu_start()
128 	reg &= ~(SLCR_A9_CPU_CLKSTOP << cpu);  in zynq_slcr_cpu_start()
131 	zynq_slcr_cpu_state_write(cpu, false);  in zynq_slcr_cpu_start()
135  * zynq_slcr_cpu_stop - Stop cpu
136  * @cpu:	cpu number
138 void zynq_slcr_cpu_stop(int cpu)  in zynq_slcr_cpu_stop()  argument
143 	reg |= (SLCR_A9_CPU_CLKSTOP | SLCR_A9_CPU_RST) << cpu;  in zynq_slcr_cpu_stop()
148  * zynq_slcr_cpu_state_read - Read cpu state
149  * @cpu:	cpu number
151  * SLCR_REBOOT_STATUS save upper 2 bits (31/30 cpu states for cpu0 and cpu1)
152  * 0 means cpu is running, 1 cpu is going to die.
154  * Return: true if cpu is running, false if cpu is going to die
156 bool zynq_slcr_cpu_state_read(int cpu)  in zynq_slcr_cpu_state_read()  argument
161 	state &= 1 << (31 - cpu);  in zynq_slcr_cpu_state_read()
167  * zynq_slcr_cpu_state_write - Write cpu state
168  * @cpu:	cpu number
169  * @die:	cpu state - true if cpu is going to die
171  * SLCR_REBOOT_STATUS save upper 2 bits (31/30 cpu states for cpu0 and cpu1)
172  * 0 means cpu is running, 1 cpu is going to die.
174 void zynq_slcr_cpu_state_write(int cpu, bool die)  in zynq_slcr_cpu_state_write()  argument
179 	mask = 1 << (31 - cpu);  in zynq_slcr_cpu_state_write()
188  * zynq_early_slcr_init - Early slcr init function
198 	np = of_find_compatible_node(NULL, NULL, "xlnx,zynq-slcr");  in zynq_early_slcr_init()
210 	np->data = (__force void *)zynq_slcr_base;  in zynq_early_slcr_init()
212 	zynq_slcr_regmap = syscon_regmap_lookup_by_compatible("xlnx,zynq-slcr");  in zynq_early_slcr_init()
214 		pr_err("%s: failed to find zynq-slcr\n", __func__);  in zynq_early_slcr_init()
216 		return -ENODEV;  in zynq_early_slcr_init()