linux-imx

/*

 * Windfarm PowerMac thermal control. SMU based controls

 *

 * (c) Copyright 2005 Benjamin Herrenschmidt, IBM Corp.

 *                    <benh@kernel.crashing.org>

 *

 * Released under the term of the GNU GPL v2.

 */

​

#include <linux/types.h>

#include <linux/errno.h>

#include <linux/kernel.h>

#include <linux/delay.h>

#include <linux/slab.h>

#include <linux/init.h>

#include <linux/wait.h>

#include <linux/completion.h>

#include <asm/prom.h>

#include <asm/machdep.h>

#include <asm/io.h>

#include <asm/sections.h>

#include <asm/smu.h>

​

#include "windfarm.h"

​

#define VERSION "0.4"

​

#undef DEBUG

​

#ifdef DEBUG

#define DBG(args...)    printk(args)

#else

#define DBG(args...)    do { } while(0)

#endif

​

static int smu_supports_new_fans_ops = 1;

​

/*

 * SMU fans control object

 */

​

static LIST_HEAD(smu_fans);

​

struct smu_fan_control {

    struct list_head    link;

    int             fan_type;   /* 0 = rpm, 1 = pwm */

    u32         reg;        /* index in SMU */

    s32         value;      /* current value */

    s32         min, max;   /* min/max values */

    struct wf_control   ctrl;

};

#define to_smu_fan(c) container_of(c, struct smu_fan_control, ctrl)

​

static int smu_set_fan(int pwm, u8 id, u16 value)

{

    struct smu_cmd cmd;

    u8 buffer[16];

    DECLARE_COMPLETION_ONSTACK(comp);

    int rc;

​

    /* Fill SMU command structure */

    cmd.cmd = SMU_CMD_FAN_COMMAND;

​