arm/mach-keystone/psc.c

1 // SPDX-License-Identifier: GPL-2.0+
5  * (C) Copyright 2012-2014
16  * psc_delay() - delay for psc
27  * psc_wait() - Wait for end of transitional state
34  * Return: 0 when the domain is free. Returns -1 if a timeout occurred waiting
43 	 * Do nothing if the power domain is in transition. This should never  in psc_wait()
59 		return -1;  in psc_wait()
65  * psc_get_domain_num() - Get the domain number
72 	/* Get the power domain associated with the module number */  in psc_get_domain_num()
80  * psc_set_state() - powers up/down a module
84  * Powers up/down the requested module and the associated power domain if
85  * required. No action is taken it the module is already powered up/down.
87  * be left in the power on state. Multiple modules can exist in a power
88  * domain, so powering down the domain based on a single module is not done.
90  * Return: 0 on success, -1 if the module can't be powered up, or if there is a
103 	 * Get the power domain associated with the module number, and reset  in psc_set_state()
110 	/* Wait for the status of the domain/module to be non-transitional */  in psc_set_state()
112 		return -1;  in psc_set_state()
118 	 * Set the next state of the power domain to on. It's OK if the domain  in psc_set_state()
119 	 * is always on. This code will not ever power down a domain, so no  in psc_set_state()
120 	 * change is made if the new state is power down.  in psc_set_state()
145  * psc_enable_module() - power up a module
148  * Powers up the requested module and the associated power domain
151  * Return: 0 on success, -1 if the module can't be powered up, or
168  * psc_disable_module() - Power down a module
171  * Return: 0 on success, -1 on failure or timeout.
188  * psc_set_reset_iso() - Set the reset isolation bit in mdctl
216  * psc_disable_domain() - Disable a power domain
237  * psc_module_keep_in_reset_enabled() - Keep module in enabled,in-reset state
284 		timeout--;  in psc_module_keep_in_reset_enabled()
290 		return -ETIMEDOUT;  in psc_module_keep_in_reset_enabled()
296  * psc_module_release_from_reset() - Release the module from reset
313 	/* Should be set to 1 to de-assert Local reset */  in psc_module_release_from_reset()
328 		timeout--;  in psc_module_release_from_reset()
334 		return -ETIMEDOUT;  in psc_module_release_from_reset()