platforms/44x/cpm.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
8  * Based on arch/powerpc/platforms/44x/idle.c:
16  * See file CREDITS for list of people who contributed to this
24 #include <linux/suspend.h>
26 #include <asm/dcr-native.h>
43 	unsigned int	suspend;  member
64 	 * unconditionally put to sleep when the corresponding CPM bit is  in cpm_set()
66 	 * put to sleep, they will. Here we do not verify, we just  in cpm_set()
67 	 * set them and expect them to eventually go off when they can.  in cpm_set()
72 	/* return old state, to restore later if needed */  in cpm_set()
87 	/* return to initial state */  in cpm_idle_wait()
99 	/* go to wait state so that CPM0_ER[CPU] can take effect */  in cpm_idle_sleep()
137 	*(s-1) = '\n'; /* convert the last space to a newline */  in cpm_idle_show()
139 	return s - buf;  in cpm_idle_show()
151 	len = p ? p - buf : n;  in cpm_idle_store()
160 	return -EINVAL;  in cpm_idle_store()
164 	__ATTR(idle, 0644, cpm_idle_show, cpm_idle_store);
173 	ret = sysfs_create_file(&dev->kobj,  in cpm_idle_config_sysfs()
177 		       "cpm: failed to create idle sysfs entry\n");  in cpm_idle_config_sysfs()
194 		return !!cpm.suspend;  in cpm_suspend_valid()
208 	/* go to sleep state */  in cpm_suspend_standby()
222 		cpm_suspend_standby(cpm.suspend);  in cpm_suspend_enter()
259 		ret = -EINVAL;  in cpm_init()
269 		ret = -EINVAL;  in cpm_init()
276 		printk(KERN_ERR "cpm: failed to map dcr property for %pOF\n",  in cpm_init()
278 		ret = -EINVAL;  in cpm_init()
288 	if (cpm_get_uint_property(np, "er-offset") == 0) {  in cpm_init()
298 	/* Now let's see what IPs to turn off for the following modes */  in cpm_init()
300 	cpm.unused = cpm_get_uint_property(np, "unused-units");  in cpm_init()
301 	cpm.idle_doze = cpm_get_uint_property(np, "idle-doze");  in cpm_init()
303 	cpm.suspend = cpm_get_uint_property(np, "suspend");  in cpm_init()
317 	if (cpm.standby || cpm.suspend)  in cpm_init()