742 lines
18 KiB
C
742 lines
18 KiB
C
/*
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* Windfarm PowerMac thermal control. SMU based 1 CPU desktop control loops
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*
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* (c) Copyright 2005 Benjamin Herrenschmidt, IBM Corp.
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* <benh@kernel.crashing.org>
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*
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* Released under the term of the GNU GPL v2.
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*
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* The algorithm used is the PID control algorithm, used the same
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* way the published Darwin code does, using the same values that
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* are present in the Darwin 8.2 snapshot property lists (note however
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* that none of the code has been re-used, it's a complete re-implementation
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*
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* The various control loops found in Darwin config file are:
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*
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* PowerMac9,1
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* ===========
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*
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* Has 3 control loops: CPU fans is similar to PowerMac8,1 (though it doesn't
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* try to play with other control loops fans). Drive bay is rather basic PID
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* with one sensor and one fan. Slots area is a bit different as the Darwin
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* driver is supposed to be capable of working in a special "AGP" mode which
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* involves the presence of an AGP sensor and an AGP fan (possibly on the
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* AGP card itself). I can't deal with that special mode as I don't have
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* access to those additional sensor/fans for now (though ultimately, it would
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* be possible to add sensor objects for them) so I'm only implementing the
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* basic PCI slot control loop
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*/
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/spinlock.h>
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#include <linux/wait.h>
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#include <linux/kmod.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <asm/prom.h>
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#include <asm/machdep.h>
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#include <asm/io.h>
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#include <asm/sections.h>
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#include <asm/smu.h>
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#include "windfarm.h"
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#include "windfarm_pid.h"
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#define VERSION "0.4"
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#undef DEBUG
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#ifdef DEBUG
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#define DBG(args...) printk(args)
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#else
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#define DBG(args...) do { } while(0)
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#endif
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/* define this to force CPU overtemp to 74 degree, useful for testing
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* the overtemp code
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*/
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#undef HACKED_OVERTEMP
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/* Controls & sensors */
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static struct wf_sensor *sensor_cpu_power;
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static struct wf_sensor *sensor_cpu_temp;
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static struct wf_sensor *sensor_hd_temp;
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static struct wf_sensor *sensor_slots_power;
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static struct wf_control *fan_cpu_main;
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static struct wf_control *fan_cpu_second;
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static struct wf_control *fan_cpu_third;
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static struct wf_control *fan_hd;
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static struct wf_control *fan_slots;
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static struct wf_control *cpufreq_clamp;
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/* Set to kick the control loop into life */
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static int wf_smu_all_controls_ok, wf_smu_all_sensors_ok, wf_smu_started;
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/* Failure handling.. could be nicer */
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#define FAILURE_FAN 0x01
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#define FAILURE_SENSOR 0x02
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#define FAILURE_OVERTEMP 0x04
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static unsigned int wf_smu_failure_state;
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static int wf_smu_readjust, wf_smu_skipping;
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/*
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* ****** CPU Fans Control Loop ******
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*
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*/
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#define WF_SMU_CPU_FANS_INTERVAL 1
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#define WF_SMU_CPU_FANS_MAX_HISTORY 16
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/* State data used by the cpu fans control loop
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*/
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struct wf_smu_cpu_fans_state {
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int ticks;
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s32 cpu_setpoint;
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struct wf_cpu_pid_state pid;
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};
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static struct wf_smu_cpu_fans_state *wf_smu_cpu_fans;
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/*
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* ****** Drive Fan Control Loop ******
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*
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*/
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struct wf_smu_drive_fans_state {
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int ticks;
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s32 setpoint;
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struct wf_pid_state pid;
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};
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static struct wf_smu_drive_fans_state *wf_smu_drive_fans;
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/*
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* ****** Slots Fan Control Loop ******
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*
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*/
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struct wf_smu_slots_fans_state {
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int ticks;
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s32 setpoint;
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struct wf_pid_state pid;
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};
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static struct wf_smu_slots_fans_state *wf_smu_slots_fans;
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/*
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* ***** Implementation *****
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*
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*/
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static void wf_smu_create_cpu_fans(void)
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{
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struct wf_cpu_pid_param pid_param;
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const struct smu_sdbp_header *hdr;
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struct smu_sdbp_cpupiddata *piddata;
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struct smu_sdbp_fvt *fvt;
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s32 tmax, tdelta, maxpow, powadj;
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/* First, locate the PID params in SMU SBD */
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hdr = smu_get_sdb_partition(SMU_SDB_CPUPIDDATA_ID, NULL);
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if (hdr == 0) {
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printk(KERN_WARNING "windfarm: CPU PID fan config not found "
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"max fan speed\n");
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goto fail;
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}
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piddata = (struct smu_sdbp_cpupiddata *)&hdr[1];
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/* Get the FVT params for operating point 0 (the only supported one
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* for now) in order to get tmax
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*/
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hdr = smu_get_sdb_partition(SMU_SDB_FVT_ID, NULL);
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if (hdr) {
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fvt = (struct smu_sdbp_fvt *)&hdr[1];
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tmax = ((s32)fvt->maxtemp) << 16;
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} else
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tmax = 0x5e0000; /* 94 degree default */
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/* Alloc & initialize state */
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wf_smu_cpu_fans = kmalloc(sizeof(struct wf_smu_cpu_fans_state),
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GFP_KERNEL);
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if (wf_smu_cpu_fans == NULL)
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goto fail;
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wf_smu_cpu_fans->ticks = 1;
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/* Fill PID params */
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pid_param.interval = WF_SMU_CPU_FANS_INTERVAL;
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pid_param.history_len = piddata->history_len;
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if (pid_param.history_len > WF_CPU_PID_MAX_HISTORY) {
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printk(KERN_WARNING "windfarm: History size overflow on "
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"CPU control loop (%d)\n", piddata->history_len);
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pid_param.history_len = WF_CPU_PID_MAX_HISTORY;
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}
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pid_param.gd = piddata->gd;
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pid_param.gp = piddata->gp;
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pid_param.gr = piddata->gr / pid_param.history_len;
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tdelta = ((s32)piddata->target_temp_delta) << 16;
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maxpow = ((s32)piddata->max_power) << 16;
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powadj = ((s32)piddata->power_adj) << 16;
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pid_param.tmax = tmax;
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pid_param.ttarget = tmax - tdelta;
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pid_param.pmaxadj = maxpow - powadj;
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pid_param.min = fan_cpu_main->ops->get_min(fan_cpu_main);
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pid_param.max = fan_cpu_main->ops->get_max(fan_cpu_main);
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wf_cpu_pid_init(&wf_smu_cpu_fans->pid, &pid_param);
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DBG("wf: CPU Fan control initialized.\n");
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DBG(" ttarged=%d.%03d, tmax=%d.%03d, min=%d RPM, max=%d RPM\n",
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FIX32TOPRINT(pid_param.ttarget), FIX32TOPRINT(pid_param.tmax),
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pid_param.min, pid_param.max);
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return;
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fail:
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printk(KERN_WARNING "windfarm: CPU fan config not found\n"
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"for this machine model, max fan speed\n");
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if (cpufreq_clamp)
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wf_control_set_max(cpufreq_clamp);
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if (fan_cpu_main)
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wf_control_set_max(fan_cpu_main);
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}
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static void wf_smu_cpu_fans_tick(struct wf_smu_cpu_fans_state *st)
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{
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s32 new_setpoint, temp, power;
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int rc;
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if (--st->ticks != 0) {
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if (wf_smu_readjust)
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goto readjust;
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return;
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}
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st->ticks = WF_SMU_CPU_FANS_INTERVAL;
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rc = sensor_cpu_temp->ops->get_value(sensor_cpu_temp, &temp);
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if (rc) {
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printk(KERN_WARNING "windfarm: CPU temp sensor error %d\n",
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rc);
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wf_smu_failure_state |= FAILURE_SENSOR;
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return;
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}
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rc = sensor_cpu_power->ops->get_value(sensor_cpu_power, &power);
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if (rc) {
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printk(KERN_WARNING "windfarm: CPU power sensor error %d\n",
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rc);
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wf_smu_failure_state |= FAILURE_SENSOR;
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return;
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}
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DBG("wf_smu: CPU Fans tick ! CPU temp: %d.%03d, power: %d.%03d\n",
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FIX32TOPRINT(temp), FIX32TOPRINT(power));
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#ifdef HACKED_OVERTEMP
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if (temp > 0x4a0000)
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wf_smu_failure_state |= FAILURE_OVERTEMP;
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#else
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if (temp > st->pid.param.tmax)
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wf_smu_failure_state |= FAILURE_OVERTEMP;
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#endif
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new_setpoint = wf_cpu_pid_run(&st->pid, power, temp);
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DBG("wf_smu: new_setpoint: %d RPM\n", (int)new_setpoint);
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if (st->cpu_setpoint == new_setpoint)
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return;
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st->cpu_setpoint = new_setpoint;
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readjust:
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if (fan_cpu_main && wf_smu_failure_state == 0) {
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rc = fan_cpu_main->ops->set_value(fan_cpu_main,
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st->cpu_setpoint);
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if (rc) {
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printk(KERN_WARNING "windfarm: CPU main fan"
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" error %d\n", rc);
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wf_smu_failure_state |= FAILURE_FAN;
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}
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}
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if (fan_cpu_second && wf_smu_failure_state == 0) {
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rc = fan_cpu_second->ops->set_value(fan_cpu_second,
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st->cpu_setpoint);
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if (rc) {
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printk(KERN_WARNING "windfarm: CPU second fan"
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" error %d\n", rc);
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wf_smu_failure_state |= FAILURE_FAN;
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}
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}
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if (fan_cpu_third && wf_smu_failure_state == 0) {
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rc = fan_cpu_main->ops->set_value(fan_cpu_third,
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st->cpu_setpoint);
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if (rc) {
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printk(KERN_WARNING "windfarm: CPU third fan"
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" error %d\n", rc);
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wf_smu_failure_state |= FAILURE_FAN;
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}
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}
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}
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static void wf_smu_create_drive_fans(void)
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{
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struct wf_pid_param param = {
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.interval = 5,
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.history_len = 2,
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.gd = 0x01e00000,
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.gp = 0x00500000,
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.gr = 0x00000000,
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.itarget = 0x00200000,
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};
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/* Alloc & initialize state */
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wf_smu_drive_fans = kmalloc(sizeof(struct wf_smu_drive_fans_state),
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GFP_KERNEL);
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if (wf_smu_drive_fans == NULL) {
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printk(KERN_WARNING "windfarm: Memory allocation error"
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" max fan speed\n");
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goto fail;
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}
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wf_smu_drive_fans->ticks = 1;
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/* Fill PID params */
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param.additive = (fan_hd->type == WF_CONTROL_RPM_FAN);
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param.min = fan_hd->ops->get_min(fan_hd);
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param.max = fan_hd->ops->get_max(fan_hd);
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wf_pid_init(&wf_smu_drive_fans->pid, ¶m);
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DBG("wf: Drive Fan control initialized.\n");
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DBG(" itarged=%d.%03d, min=%d RPM, max=%d RPM\n",
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FIX32TOPRINT(param.itarget), param.min, param.max);
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return;
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fail:
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if (fan_hd)
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wf_control_set_max(fan_hd);
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}
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static void wf_smu_drive_fans_tick(struct wf_smu_drive_fans_state *st)
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{
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s32 new_setpoint, temp;
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int rc;
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if (--st->ticks != 0) {
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if (wf_smu_readjust)
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goto readjust;
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return;
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}
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st->ticks = st->pid.param.interval;
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rc = sensor_hd_temp->ops->get_value(sensor_hd_temp, &temp);
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if (rc) {
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printk(KERN_WARNING "windfarm: HD temp sensor error %d\n",
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rc);
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wf_smu_failure_state |= FAILURE_SENSOR;
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return;
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}
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DBG("wf_smu: Drive Fans tick ! HD temp: %d.%03d\n",
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FIX32TOPRINT(temp));
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if (temp > (st->pid.param.itarget + 0x50000))
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wf_smu_failure_state |= FAILURE_OVERTEMP;
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new_setpoint = wf_pid_run(&st->pid, temp);
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DBG("wf_smu: new_setpoint: %d\n", (int)new_setpoint);
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if (st->setpoint == new_setpoint)
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return;
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st->setpoint = new_setpoint;
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readjust:
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if (fan_hd && wf_smu_failure_state == 0) {
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rc = fan_hd->ops->set_value(fan_hd, st->setpoint);
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if (rc) {
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printk(KERN_WARNING "windfarm: HD fan error %d\n",
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rc);
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wf_smu_failure_state |= FAILURE_FAN;
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}
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}
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}
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static void wf_smu_create_slots_fans(void)
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{
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struct wf_pid_param param = {
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.interval = 1,
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.history_len = 8,
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.gd = 0x00000000,
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.gp = 0x00000000,
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.gr = 0x00020000,
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.itarget = 0x00000000
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};
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/* Alloc & initialize state */
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wf_smu_slots_fans = kmalloc(sizeof(struct wf_smu_slots_fans_state),
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GFP_KERNEL);
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if (wf_smu_slots_fans == NULL) {
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printk(KERN_WARNING "windfarm: Memory allocation error"
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" max fan speed\n");
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goto fail;
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}
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wf_smu_slots_fans->ticks = 1;
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|
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/* Fill PID params */
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param.additive = (fan_slots->type == WF_CONTROL_RPM_FAN);
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param.min = fan_slots->ops->get_min(fan_slots);
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param.max = fan_slots->ops->get_max(fan_slots);
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wf_pid_init(&wf_smu_slots_fans->pid, ¶m);
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DBG("wf: Slots Fan control initialized.\n");
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DBG(" itarged=%d.%03d, min=%d RPM, max=%d RPM\n",
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FIX32TOPRINT(param.itarget), param.min, param.max);
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return;
|
|
|
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fail:
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if (fan_slots)
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wf_control_set_max(fan_slots);
|
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}
|
|
|
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static void wf_smu_slots_fans_tick(struct wf_smu_slots_fans_state *st)
|
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{
|
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s32 new_setpoint, power;
|
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int rc;
|
|
|
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if (--st->ticks != 0) {
|
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if (wf_smu_readjust)
|
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goto readjust;
|
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return;
|
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}
|
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st->ticks = st->pid.param.interval;
|
|
|
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rc = sensor_slots_power->ops->get_value(sensor_slots_power, &power);
|
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if (rc) {
|
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printk(KERN_WARNING "windfarm: Slots power sensor error %d\n",
|
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rc);
|
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wf_smu_failure_state |= FAILURE_SENSOR;
|
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return;
|
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}
|
|
|
|
DBG("wf_smu: Slots Fans tick ! Slots power: %d.%03d\n",
|
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FIX32TOPRINT(power));
|
|
|
|
#if 0 /* Check what makes a good overtemp condition */
|
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if (power > (st->pid.param.itarget + 0x50000))
|
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wf_smu_failure_state |= FAILURE_OVERTEMP;
|
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#endif
|
|
|
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new_setpoint = wf_pid_run(&st->pid, power);
|
|
|
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DBG("wf_smu: new_setpoint: %d\n", (int)new_setpoint);
|
|
|
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if (st->setpoint == new_setpoint)
|
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return;
|
|
st->setpoint = new_setpoint;
|
|
readjust:
|
|
if (fan_slots && wf_smu_failure_state == 0) {
|
|
rc = fan_slots->ops->set_value(fan_slots, st->setpoint);
|
|
if (rc) {
|
|
printk(KERN_WARNING "windfarm: Slots fan error %d\n",
|
|
rc);
|
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wf_smu_failure_state |= FAILURE_FAN;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* ****** Setup / Init / Misc ... ******
|
|
*
|
|
*/
|
|
|
|
static void wf_smu_tick(void)
|
|
{
|
|
unsigned int last_failure = wf_smu_failure_state;
|
|
unsigned int new_failure;
|
|
|
|
if (!wf_smu_started) {
|
|
DBG("wf: creating control loops !\n");
|
|
wf_smu_create_drive_fans();
|
|
wf_smu_create_slots_fans();
|
|
wf_smu_create_cpu_fans();
|
|
wf_smu_started = 1;
|
|
}
|
|
|
|
/* Skipping ticks */
|
|
if (wf_smu_skipping && --wf_smu_skipping)
|
|
return;
|
|
|
|
wf_smu_failure_state = 0;
|
|
if (wf_smu_drive_fans)
|
|
wf_smu_drive_fans_tick(wf_smu_drive_fans);
|
|
if (wf_smu_slots_fans)
|
|
wf_smu_slots_fans_tick(wf_smu_slots_fans);
|
|
if (wf_smu_cpu_fans)
|
|
wf_smu_cpu_fans_tick(wf_smu_cpu_fans);
|
|
|
|
wf_smu_readjust = 0;
|
|
new_failure = wf_smu_failure_state & ~last_failure;
|
|
|
|
/* If entering failure mode, clamp cpufreq and ramp all
|
|
* fans to full speed.
|
|
*/
|
|
if (wf_smu_failure_state && !last_failure) {
|
|
if (cpufreq_clamp)
|
|
wf_control_set_max(cpufreq_clamp);
|
|
if (fan_cpu_main)
|
|
wf_control_set_max(fan_cpu_main);
|
|
if (fan_cpu_second)
|
|
wf_control_set_max(fan_cpu_second);
|
|
if (fan_cpu_third)
|
|
wf_control_set_max(fan_cpu_third);
|
|
if (fan_hd)
|
|
wf_control_set_max(fan_hd);
|
|
if (fan_slots)
|
|
wf_control_set_max(fan_slots);
|
|
}
|
|
|
|
/* If leaving failure mode, unclamp cpufreq and readjust
|
|
* all fans on next iteration
|
|
*/
|
|
if (!wf_smu_failure_state && last_failure) {
|
|
if (cpufreq_clamp)
|
|
wf_control_set_min(cpufreq_clamp);
|
|
wf_smu_readjust = 1;
|
|
}
|
|
|
|
/* Overtemp condition detected, notify and start skipping a couple
|
|
* ticks to let the temperature go down
|
|
*/
|
|
if (new_failure & FAILURE_OVERTEMP) {
|
|
wf_set_overtemp();
|
|
wf_smu_skipping = 2;
|
|
}
|
|
|
|
/* We only clear the overtemp condition if overtemp is cleared
|
|
* _and_ no other failure is present. Since a sensor error will
|
|
* clear the overtemp condition (can't measure temperature) at
|
|
* the control loop levels, but we don't want to keep it clear
|
|
* here in this case
|
|
*/
|
|
if (new_failure == 0 && last_failure & FAILURE_OVERTEMP)
|
|
wf_clear_overtemp();
|
|
}
|
|
|
|
|
|
static void wf_smu_new_control(struct wf_control *ct)
|
|
{
|
|
if (wf_smu_all_controls_ok)
|
|
return;
|
|
|
|
if (fan_cpu_main == NULL && !strcmp(ct->name, "cpu-rear-fan-0")) {
|
|
if (wf_get_control(ct) == 0)
|
|
fan_cpu_main = ct;
|
|
}
|
|
|
|
if (fan_cpu_second == NULL && !strcmp(ct->name, "cpu-rear-fan-1")) {
|
|
if (wf_get_control(ct) == 0)
|
|
fan_cpu_second = ct;
|
|
}
|
|
|
|
if (fan_cpu_third == NULL && !strcmp(ct->name, "cpu-front-fan-0")) {
|
|
if (wf_get_control(ct) == 0)
|
|
fan_cpu_third = ct;
|
|
}
|
|
|
|
if (cpufreq_clamp == NULL && !strcmp(ct->name, "cpufreq-clamp")) {
|
|
if (wf_get_control(ct) == 0)
|
|
cpufreq_clamp = ct;
|
|
}
|
|
|
|
if (fan_hd == NULL && !strcmp(ct->name, "drive-bay-fan")) {
|
|
if (wf_get_control(ct) == 0)
|
|
fan_hd = ct;
|
|
}
|
|
|
|
if (fan_slots == NULL && !strcmp(ct->name, "slots-fan")) {
|
|
if (wf_get_control(ct) == 0)
|
|
fan_slots = ct;
|
|
}
|
|
|
|
if (fan_cpu_main && (fan_cpu_second || fan_cpu_third) && fan_hd &&
|
|
fan_slots && cpufreq_clamp)
|
|
wf_smu_all_controls_ok = 1;
|
|
}
|
|
|
|
static void wf_smu_new_sensor(struct wf_sensor *sr)
|
|
{
|
|
if (wf_smu_all_sensors_ok)
|
|
return;
|
|
|
|
if (sensor_cpu_power == NULL && !strcmp(sr->name, "cpu-power")) {
|
|
if (wf_get_sensor(sr) == 0)
|
|
sensor_cpu_power = sr;
|
|
}
|
|
|
|
if (sensor_cpu_temp == NULL && !strcmp(sr->name, "cpu-temp")) {
|
|
if (wf_get_sensor(sr) == 0)
|
|
sensor_cpu_temp = sr;
|
|
}
|
|
|
|
if (sensor_hd_temp == NULL && !strcmp(sr->name, "hd-temp")) {
|
|
if (wf_get_sensor(sr) == 0)
|
|
sensor_hd_temp = sr;
|
|
}
|
|
|
|
if (sensor_slots_power == NULL && !strcmp(sr->name, "slots-power")) {
|
|
if (wf_get_sensor(sr) == 0)
|
|
sensor_slots_power = sr;
|
|
}
|
|
|
|
if (sensor_cpu_power && sensor_cpu_temp &&
|
|
sensor_hd_temp && sensor_slots_power)
|
|
wf_smu_all_sensors_ok = 1;
|
|
}
|
|
|
|
|
|
static int wf_smu_notify(struct notifier_block *self,
|
|
unsigned long event, void *data)
|
|
{
|
|
switch(event) {
|
|
case WF_EVENT_NEW_CONTROL:
|
|
DBG("wf: new control %s detected\n",
|
|
((struct wf_control *)data)->name);
|
|
wf_smu_new_control(data);
|
|
wf_smu_readjust = 1;
|
|
break;
|
|
case WF_EVENT_NEW_SENSOR:
|
|
DBG("wf: new sensor %s detected\n",
|
|
((struct wf_sensor *)data)->name);
|
|
wf_smu_new_sensor(data);
|
|
break;
|
|
case WF_EVENT_TICK:
|
|
if (wf_smu_all_controls_ok && wf_smu_all_sensors_ok)
|
|
wf_smu_tick();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct notifier_block wf_smu_events = {
|
|
.notifier_call = wf_smu_notify,
|
|
};
|
|
|
|
static int wf_init_pm(void)
|
|
{
|
|
printk(KERN_INFO "windfarm: Initializing for Desktop G5 model\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wf_smu_probe(struct platform_device *ddev)
|
|
{
|
|
wf_register_client(&wf_smu_events);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit wf_smu_remove(struct platform_device *ddev)
|
|
{
|
|
wf_unregister_client(&wf_smu_events);
|
|
|
|
/* XXX We don't have yet a guarantee that our callback isn't
|
|
* in progress when returning from wf_unregister_client, so
|
|
* we add an arbitrary delay. I'll have to fix that in the core
|
|
*/
|
|
msleep(1000);
|
|
|
|
/* Release all sensors */
|
|
/* One more crappy race: I don't think we have any guarantee here
|
|
* that the attribute callback won't race with the sensor beeing
|
|
* disposed of, and I'm not 100% certain what best way to deal
|
|
* with that except by adding locks all over... I'll do that
|
|
* eventually but heh, who ever rmmod this module anyway ?
|
|
*/
|
|
if (sensor_cpu_power)
|
|
wf_put_sensor(sensor_cpu_power);
|
|
if (sensor_cpu_temp)
|
|
wf_put_sensor(sensor_cpu_temp);
|
|
if (sensor_hd_temp)
|
|
wf_put_sensor(sensor_hd_temp);
|
|
if (sensor_slots_power)
|
|
wf_put_sensor(sensor_slots_power);
|
|
|
|
/* Release all controls */
|
|
if (fan_cpu_main)
|
|
wf_put_control(fan_cpu_main);
|
|
if (fan_cpu_second)
|
|
wf_put_control(fan_cpu_second);
|
|
if (fan_cpu_third)
|
|
wf_put_control(fan_cpu_third);
|
|
if (fan_hd)
|
|
wf_put_control(fan_hd);
|
|
if (fan_slots)
|
|
wf_put_control(fan_slots);
|
|
if (cpufreq_clamp)
|
|
wf_put_control(cpufreq_clamp);
|
|
|
|
/* Destroy control loops state structures */
|
|
kfree(wf_smu_slots_fans);
|
|
kfree(wf_smu_drive_fans);
|
|
kfree(wf_smu_cpu_fans);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver wf_smu_driver = {
|
|
.probe = wf_smu_probe,
|
|
.remove = __devexit_p(wf_smu_remove),
|
|
.driver = {
|
|
.name = "windfarm",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
|
|
static int __init wf_smu_init(void)
|
|
{
|
|
int rc = -ENODEV;
|
|
|
|
if (of_machine_is_compatible("PowerMac9,1"))
|
|
rc = wf_init_pm();
|
|
|
|
if (rc == 0) {
|
|
#ifdef MODULE
|
|
request_module("windfarm_smu_controls");
|
|
request_module("windfarm_smu_sensors");
|
|
request_module("windfarm_lm75_sensor");
|
|
request_module("windfarm_cpufreq_clamp");
|
|
|
|
#endif /* MODULE */
|
|
platform_driver_register(&wf_smu_driver);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void __exit wf_smu_exit(void)
|
|
{
|
|
|
|
platform_driver_unregister(&wf_smu_driver);
|
|
}
|
|
|
|
|
|
module_init(wf_smu_init);
|
|
module_exit(wf_smu_exit);
|
|
|
|
MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>");
|
|
MODULE_DESCRIPTION("Thermal control logic for PowerMac9,1");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_ALIAS("platform:windfarm");
|