2  *  Copyright (C) 2002 - 2005 Benjamin Herrenschmidt <benh@kernel.crashing.org>
3  *  and                       Markus Demleitner <msdemlei@cl.uni-heidelberg.de>
49 #define PCR_FREQ_REQ_VALID	0x00010000U	/* freq request valid */
76  * the various frequencies, retrieved from the device-tree
96  * SMU based voltage switching for Neo2 platforms
111  * Platform function based voltage/vdnap switching for Neo2
148  * SCOM based frequency switching for 970FX rev3
208  * Fake voltage switching for platforms with missing support
218  * Platform function based voltage switching for PowerMac7,2 & 7,3
243  * Platform function based frequency switching for PowerMac7,2 & 7,3
352 	int rc = -ENODEV;  in g5_neo2_cpufreq_init()
363 		return -ENODEV;  in g5_neo2_cpufreq_init()
366 	valp = of_get_property(cpunode, "cpu-version", NULL);  in g5_neo2_cpufreq_init()
368 		DBG("No cpu-version property !\n");  in g5_neo2_cpufreq_init()
377 	/* Look for the powertune data in the device-tree */  in g5_neo2_cpufreq_init()
378 	g5_pmode_data = of_get_property(cpunode, "power-mode-data",&psize);  in g5_neo2_cpufreq_init()
380 		DBG("No power-mode-data !\n");  in g5_neo2_cpufreq_init()
383 	g5_pmode_max = psize / sizeof(u32) - 1;  in g5_neo2_cpufreq_init()
393 		ssize = (shdr->len * sizeof(u32)) - sizeof(*shdr);  in g5_neo2_cpufreq_init()
411 		pfunc_set_vdnap0 = pmf_find_function(root, "set-vdnap0");  in g5_neo2_cpufreq_init()
413 			pmf_find_function(root, "slewing-done");  in g5_neo2_cpufreq_init()
428 	 * From what I see, clock-frequency is always the maximal frequency.  in g5_neo2_cpufreq_init()
430 	 * with powertune steps for now. We also only implement full freq and  in g5_neo2_cpufreq_init()
431 	 * half freq in this version. So far, I haven't yet seen a machine  in g5_neo2_cpufreq_init()
434 	valp = of_get_property(cpunode, "clock-frequency", NULL);  in g5_neo2_cpufreq_init()
436 		return -ENODEV;  in g5_neo2_cpufreq_init()
453 	g5_pmode_cur = -1;  in g5_neo2_cpufreq_init()
467 	 * hotplug CPU with a dynamic device-tree ...  in g5_neo2_cpufreq_init()
497 		rc = -ENODEV;  in g5_pm72_cpufreq_init()
502 	for_each_node_by_name(hwclock, "i2c-hwclock") {  in g5_pm72_cpufreq_init()
504 				"hwctrl-location", NULL);  in g5_pm72_cpufreq_init()
509 		if (!of_get_property(hwclock, "platform-get-frequency", NULL))  in g5_pm72_cpufreq_init()
515 		rc = -ENODEV;  in g5_pm72_cpufreq_init()
523 		pmf_find_function(hwclock, "get-frequency");  in g5_pm72_cpufreq_init()
525 		pmf_find_function(hwclock, "set-frequency-high");  in g5_pm72_cpufreq_init()
527 		pmf_find_function(hwclock, "set-frequency-low");  in g5_pm72_cpufreq_init()
529 		pmf_find_function(hwclock, "slewing-done");  in g5_pm72_cpufreq_init()
531 		pmf_find_function(hwclock, "set-voltage-high-0");  in g5_pm72_cpufreq_init()
533 		pmf_find_function(hwclock, "set-voltage-low-0");  in g5_pm72_cpufreq_init()
535 		pmf_find_function(hwclock, "set-voltage-high-1");  in g5_pm72_cpufreq_init()
537 		pmf_find_function(hwclock, "set-voltage-low-1");  in g5_pm72_cpufreq_init()
543 		rc = -ENODEV;  in g5_pm72_cpufreq_init()
561 	/* Note: The device tree also contains a "platform-set-values"  in g5_pm72_cpufreq_init()
567 	/* Get max frequency from device-tree */  in g5_pm72_cpufreq_init()
568 	valp = of_get_property(cpunode, "clock-frequency", NULL);  in g5_pm72_cpufreq_init()
571 		rc = -ENODEV;  in g5_pm72_cpufreq_init()
577 	/* Now calculate reduced frequency by using the cpuid input freq  in g5_pm72_cpufreq_init()
587 		rc = -ENODEV;  in g5_pm72_cpufreq_init()
598 		rc = -ENXIO;  in g5_pm72_cpufreq_init()
618 	g5_pmode_cur = -1;  in g5_pm72_cpufreq_init()
657 		return -ENODEV;  in g5_cpufreq_init()