drivers/cpufreq/elanfreq.c

15  *	2002-02-13: - initial revision for 2.4.18-pre9 by Robert Schwebel
37 	int clock;		/* frequency in kHz                         */  member
39 	int val80h;		/* CPU Clock Speed Register                 */
73  *	Finds out at which frequency the CPU of the Elan SOC runs
81 	u8 clockspeed_reg;    /* Clock Speed Register */  in elanfreq_get_cpu_frequency()
91 	/* Are we in CPU clock multiplied mode (66/99 MHz)? */  in elanfreq_get_cpu_frequency()
108  *	elanfreq_set_cpu_frequency: Change the CPU core frequency
110  *	@freq: frequency in kHz
112  *	This function takes a frequency value and changes the CPU frequency
113  *	according to this. Note that the frequency has to be checked by
124 	freqs.new = elan_multiplier[state].clock;  in elanfreq_set_cpu_state()
129 	printk(KERN_INFO "elanfreq: attempting to set frequency to %i kHz\n",  in elanfreq_set_cpu_state()
130 			elan_multiplier[state].clock);  in elanfreq_set_cpu_state()
142 	 * Bit 6 enables Hyperspeed Mode (66/100 MHz core frequency)  in elanfreq_set_cpu_state()
153 	/* now, set the CPU clock speed register (0x80) */  in elanfreq_set_cpu_state()
168  *	elanfreq_validatespeed: test if frequency range is valid
171  *	This function checks if a given frequency range in kHz is valid
188 		return -EINVAL;  in elanfreq_target()
207 	if ((c->x86_vendor != X86_VENDOR_AMD) ||  in elanfreq_cpu_init()
208 	    (c->x86 != 4) || (c->x86_model != 10))  in elanfreq_cpu_init()
209 		return -ENODEV;  in elanfreq_cpu_init()
216 	for (i = 0; (elanfreq_table[i].frequency != CPUFREQ_TABLE_END); i++) {  in elanfreq_cpu_init()
217 		if (elanfreq_table[i].frequency > max_freq)  in elanfreq_cpu_init()
218 			elanfreq_table[i].frequency = CPUFREQ_ENTRY_INVALID;  in elanfreq_cpu_init()
222 	policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;  in elanfreq_cpu_init()
223 	policy->cur = elanfreq_get_cpu_frequency(0);  in elanfreq_cpu_init()
229 	cpufreq_frequency_table_get_attr(elanfreq_table, policy->cpu);  in elanfreq_cpu_init()
236 	cpufreq_frequency_table_put_attr(policy->cpu);  in elanfreq_cpu_exit()
243  * elanfreq_setup - elanfreq command line parameter parsing
247  * to set the maximum CPU frequency to 66 MHz. Note that in
249  * frequency will fall back to _current_ CPU frequency which
286 	if ((c->x86_vendor != X86_VENDOR_AMD) ||  in elanfreq_init()
287 		(c->x86 != 4) || (c->x86_model != 10)) {  in elanfreq_init()
289 		return -ENODEV;  in elanfreq_init()