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bbc_i2c: Convert to pure OF driver.

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This thing was a mess, who wrote this junk? :)

Luckily we'll soon have nice generic I2C layer drivers for this PCF
based I2C stuff on sparc64.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2008-08-29 22:34:14 -07:00
parent 6b8c90f24e
commit e21e245bcd
3 changed files with 215 additions and 250 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

121
drivers/sbus/char/bbc_envctrl.c
View File

@ -1,15 +1,15 @@
/* $Id: bbc_envctrl.c,v 1.4 2001/04/06 16:48:08 davem Exp $ /* bbc_envctrl.c: UltraSPARC-III environment control driver.
* bbc_envctrl.c: UltraSPARC-III environment control driver.
* *
* Copyright (C) 2001 David S. Miller (davem@redhat.com) * Copyright (C) 2001, 2008 David S. Miller (davem@davemloft.net)
*/ */
#include <linux/kthread.h> #include <linux/kthread.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/kmod.h> #include <linux/kmod.h>
#include <linux/reboot.h> #include <linux/reboot.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <asm/oplib.h> #include <asm/oplib.h>
#include <asm/ebus.h>
#include "bbc_i2c.h" #include "bbc_i2c.h"
#include "max1617.h" #include "max1617.h"
@ -75,43 +75,8 @@ static struct temp_limits amb_temp_limits[2] = {
{ 65, 55, 40, 5, -5, -10 }, { 65, 55, 40, 5, -5, -10 },
}; };
enum fan_action { FAN_SLOWER, FAN_SAME, FAN_FASTER, FAN_FULLBLAST, FAN_STATE_MAX }; static LIST_HEAD(all_temps);
static LIST_HEAD(all_fans);
struct bbc_cpu_temperature {
struct bbc_cpu_temperature *next;
struct bbc_i2c_client *client;
int index;
/* Current readings, and history. */
s8 curr_cpu_temp;
s8 curr_amb_temp;
s8 prev_cpu_temp;
s8 prev_amb_temp;
s8 avg_cpu_temp;
s8 avg_amb_temp;
int sample_tick;
enum fan_action fan_todo[2];
#define FAN_AMBIENT 0
#define FAN_CPU 1
};
struct bbc_cpu_temperature *all_bbc_temps;
struct bbc_fan_control {
struct bbc_fan_control *next;
struct bbc_i2c_client *client;
int index;
int psupply_fan_on;
int cpu_fan_speed;
int system_fan_speed;
};
struct bbc_fan_control *all_bbc_fans;
#define CPU_FAN_REG 0xf0 #define CPU_FAN_REG 0xf0
#define SYS_FAN_REG 0xf2 #define SYS_FAN_REG 0xf2
@ -330,7 +295,7 @@ static enum fan_action prioritize_fan_action(int which_fan)
* recommend we do, and perform that action on all the * recommend we do, and perform that action on all the
* fans. * fans.
*/ */
for (tp = all_bbc_temps; tp; tp = tp->next) { list_for_each_entry(tp, &all_temps, glob_list) {
if (tp->fan_todo[which_fan] == FAN_FULLBLAST) { if (tp->fan_todo[which_fan] == FAN_FULLBLAST) {
decision = FAN_FULLBLAST; decision = FAN_FULLBLAST;
break; break;
@ -439,7 +404,7 @@ static void fans_full_blast(void)
/* Since we will not be monitoring things anymore, put /* Since we will not be monitoring things anymore, put
* the fans on full blast. * the fans on full blast.
*/ */
for (fp = all_bbc_fans; fp; fp = fp->next) { list_for_each_entry(fp, &all_fans, glob_list) {
fp->cpu_fan_speed = FAN_SPEED_MAX; fp->cpu_fan_speed = FAN_SPEED_MAX;
fp->system_fan_speed = FAN_SPEED_MAX; fp->system_fan_speed = FAN_SPEED_MAX;
fp->psupply_fan_on = 1; fp->psupply_fan_on = 1;
@ -463,11 +428,11 @@ static int kenvctrld(void *__unused)
if (kthread_should_stop()) if (kthread_should_stop())
break; break;
for (tp = all_bbc_temps; tp; tp = tp->next) { list_for_each_entry(tp, &all_temps, glob_list) {
get_current_temps(tp); get_current_temps(tp);
analyze_temps(tp, &last_warning_jiffies); analyze_temps(tp, &last_warning_jiffies);
} }
for (fp = all_bbc_fans; fp; fp = fp->next) list_for_each_entry(fp, &all_fans, glob_list)
maybe_new_fan_speeds(fp); maybe_new_fan_speeds(fp);
} }
printk(KERN_INFO "bbc_envctrl: kenvctrld exiting...\n"); printk(KERN_INFO "bbc_envctrl: kenvctrld exiting...\n");
@ -477,7 +442,8 @@ static int kenvctrld(void *__unused)
return 0; return 0;
} }
static void attach_one_temp(struct linux_ebus_child *echild, int temp_idx) static void attach_one_temp(struct bbc_i2c_bus *bp, struct of_device *op,
int temp_idx)
{ {
struct bbc_cpu_temperature *tp; struct bbc_cpu_temperature *tp;
@ -485,20 +451,17 @@ static void attach_one_temp(struct linux_ebus_child *echild, int temp_idx)
if (!tp) if (!tp)
return; return;
tp->client = bbc_i2c_attach(echild); tp->client = bbc_i2c_attach(op);
if (!tp->client) { if (!tp->client) {
kfree(tp); kfree(tp);
return; return;
} }
tp->index = temp_idx; tp->index = temp_idx;
{
struct bbc_cpu_temperature **tpp = &all_bbc_temps; list_add(&tp->glob_list, &all_temps);
while (*tpp) list_add(&tp->bp_list, &bp->temps);
tpp = &((*tpp)->next);
tp->next = NULL;
*tpp = tp;
}
/* Tell it to convert once every 5 seconds, clear all cfg /* Tell it to convert once every 5 seconds, clear all cfg
* bits. * bits.
@ -524,7 +487,8 @@ static void attach_one_temp(struct linux_ebus_child *echild, int temp_idx)
tp->fan_todo[FAN_CPU] = FAN_SAME; tp->fan_todo[FAN_CPU] = FAN_SAME;
} }
static void attach_one_fan(struct linux_ebus_child *echild, int fan_idx) static void attach_one_fan(struct bbc_i2c_bus *bp, struct of_device *op,
int fan_idx)
{ {
struct bbc_fan_control *fp; struct bbc_fan_control *fp;
@ -532,7 +496,7 @@ static void attach_one_fan(struct linux_ebus_child *echild, int fan_idx)
if (!fp) if (!fp)
return; return;
fp->client = bbc_i2c_attach(echild); fp->client = bbc_i2c_attach(op);
if (!fp->client) { if (!fp->client) {
kfree(fp); kfree(fp);
return; return;
@ -540,13 +504,8 @@ static void attach_one_fan(struct linux_ebus_child *echild, int fan_idx)
fp->index = fan_idx; fp->index = fan_idx;
{ list_add(&fp->glob_list, &all_fans);
struct bbc_fan_control **fpp = &all_bbc_fans; list_add(&fp->bp_list, &bp->fans);
while (*fpp)
fpp = &((*fpp)->next);
fp->next = NULL;
*fpp = fp;
}
/* The i2c device controlling the fans is write-only. /* The i2c device controlling the fans is write-only.
* So the only way to keep track of the current power * So the only way to keep track of the current power
@ -563,18 +522,18 @@ static void attach_one_fan(struct linux_ebus_child *echild, int fan_idx)
set_fan_speeds(fp); set_fan_speeds(fp);
} }
int bbc_envctrl_init(void) int bbc_envctrl_init(struct bbc_i2c_bus *bp)
{ {
struct linux_ebus_child *echild; struct of_device *op;
int temp_index = 0; int temp_index = 0;
int fan_index = 0; int fan_index = 0;
int devidx = 0; int devidx = 0;
while ((echild = bbc_i2c_getdev(devidx++)) != NULL) { while ((op = bbc_i2c_getdev(devidx++)) != NULL) {
if (!strcmp(echild->prom_node->name, "temperature")) if (!strcmp(op->node->name, "temperature"))
attach_one_temp(echild, temp_index++); attach_one_temp(bp, op, temp_index++);
if (!strcmp(echild->prom_node->name, "fan-control")) if (!strcmp(op->node->name, "fan-control"))
attach_one_fan(echild, fan_index++); attach_one_fan(bp, op, fan_index++);
} }
if (temp_index != 0 && fan_index != 0) { if (temp_index != 0 && fan_index != 0) {
kenvctrld_task = kthread_run(kenvctrld, NULL, "kenvctrld"); kenvctrld_task = kthread_run(kenvctrld, NULL, "kenvctrld");
@ -597,26 +556,22 @@ static void destroy_one_fan(struct bbc_fan_control *fp)
kfree(fp); kfree(fp);
} }
void bbc_envctrl_cleanup(void) void bbc_envctrl_cleanup(struct bbc_i2c_bus *bp)
{ {
struct bbc_cpu_temperature *tp; struct bbc_cpu_temperature *tp, *tpos;
struct bbc_fan_control *fp; struct bbc_fan_control *fp, *fpos;
kthread_stop(kenvctrld_task); kthread_stop(kenvctrld_task);
tp = all_bbc_temps; list_for_each_entry_safe(tp, tpos, &bp->temps, bp_list) {
while (tp != NULL) { list_del(&tp->bp_list);
struct bbc_cpu_temperature *next = tp->next; list_del(&tp->glob_list);
destroy_one_temp(tp); destroy_one_temp(tp);
tp = next;
} }
all_bbc_temps = NULL;
fp = all_bbc_fans; list_for_each_entry_safe(fp, fpos, &bp->fans, bp_list) {
while (fp != NULL) { list_del(&fp->bp_list);
struct bbc_fan_control *next = fp->next; list_del(&fp->glob_list);
destroy_one_fan(fp); destroy_one_fan(fp);
fp = next;
} }
all_bbc_fans = NULL;
} }

269
drivers/sbus/char/bbc_i2c.c
View File

@ -1,8 +1,7 @@
/* $Id: bbc_i2c.c,v 1.2 2001/04/02 09:59:08 davem Exp $ /* bbc_i2c.c: I2C low-level driver for BBC device on UltraSPARC-III
* bbc_i2c.c: I2C low-level driver for BBC device on UltraSPARC-III
* platforms. * platforms.
* *
* Copyright (C) 2001 David S. Miller (davem@redhat.com) * Copyright (C) 2001, 2008 David S. Miller (davem@davemloft.net)
*/ */
#include <linux/module.h> #include <linux/module.h>
@ -14,9 +13,8 @@
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/interrupt.h> #include <linux/interrupt.h>
#include <asm/oplib.h> #include <linux/of.h>
#include <asm/ebus.h> #include <linux/of_device.h>
#include <asm/spitfire.h>
#include <asm/bbc.h> #include <asm/bbc.h>
#include <asm/io.h> #include <asm/io.h>
@ -53,54 +51,12 @@
* The second controller also connects to the smartcard reader, if present. * The second controller also connects to the smartcard reader, if present.
*/ */
#define NUM_CHILDREN 8 static void set_device_claimage(struct bbc_i2c_bus *bp, struct of_device *op, int val)
struct bbc_i2c_bus {
struct bbc_i2c_bus *next;
int index;
spinlock_t lock;
void __iomem *i2c_bussel_reg;
void __iomem *i2c_control_regs;
unsigned char own, clock;
wait_queue_head_t wq;
volatile int waiting;
struct linux_ebus_device *bus_edev;
struct {
struct linux_ebus_child *device;
int client_claimed;
} devs[NUM_CHILDREN];
};
static struct bbc_i2c_bus *all_bbc_i2c;
struct bbc_i2c_client {
struct bbc_i2c_bus *bp;
struct linux_ebus_child *echild;
int bus;
int address;
};
static int find_device(struct bbc_i2c_bus *bp, struct linux_ebus_child *echild)
{ {
int i; int i;
for (i = 0; i < NUM_CHILDREN; i++) { for (i = 0; i < NUM_CHILDREN; i++) {
if (bp->devs[i].device == echild) { if (bp->devs[i].device == op) {
if (bp->devs[i].client_claimed)
return 0;
return 1;
}
}
return 0;
}
static void set_device_claimage(struct bbc_i2c_bus *bp, struct linux_ebus_child *echild, int val)
{
int i;
for (i = 0; i < NUM_CHILDREN; i++) {
if (bp->devs[i].device == echild) {
bp->devs[i].client_claimed = val; bp->devs[i].client_claimed = val;
return; return;
} }
@ -110,61 +66,47 @@ static void set_device_claimage(struct bbc_i2c_bus *bp, struct linux_ebus_child
#define claim_device(BP,ECHILD) set_device_claimage(BP,ECHILD,1) #define claim_device(BP,ECHILD) set_device_claimage(BP,ECHILD,1)
#define release_device(BP,ECHILD) set_device_claimage(BP,ECHILD,0) #define release_device(BP,ECHILD) set_device_claimage(BP,ECHILD,0)
static struct bbc_i2c_bus *find_bus_for_device(struct linux_ebus_child *echild) struct of_device *bbc_i2c_getdev(struct bbc_i2c_bus *bp, int index)
{ {
struct bbc_i2c_bus *bp = all_bbc_i2c; struct of_device *op = NULL;
int curidx = 0, i;
while (bp != NULL) { for (i = 0; i < NUM_CHILDREN; i++) {
if (find_device(bp, echild) != 0) if (!(op = bp->devs[i].device))
break; break;
bp = bp->next; if (curidx == index)
goto out;
op = NULL;
curidx++;
} }
return bp;
}
struct linux_ebus_child *bbc_i2c_getdev(int index)
{
struct bbc_i2c_bus *bp = all_bbc_i2c;
struct linux_ebus_child *echild = NULL;
int curidx = 0;
while (bp != NULL) {
struct bbc_i2c_bus *next = bp->next;
int i;
for (i = 0; i < NUM_CHILDREN; i++) {
if (!(echild = bp->devs[i].device))
break;
if (curidx == index)
goto out;
echild = NULL;
curidx++;
}
bp = next;
}
out: out:
if (curidx == index) if (curidx == index)
return echild; return op;
return NULL; return NULL;
} }
struct bbc_i2c_client *bbc_i2c_attach(struct linux_ebus_child *echild) struct bbc_i2c_client *bbc_i2c_attach(struct bbc_i2c_bus *bp, struct of_device *op)
{ {
struct bbc_i2c_bus *bp = find_bus_for_device(echild);
struct bbc_i2c_client *client; struct bbc_i2c_client *client;
const u32 *reg;
if (!bp)
return NULL;
client = kzalloc(sizeof(*client), GFP_KERNEL); client = kzalloc(sizeof(*client), GFP_KERNEL);
if (!client) if (!client)
return NULL; return NULL;
client->bp = bp; client->bp = bp;
client->echild = echild; client->op = op;
client->bus = echild->resource[0].start;
client->address = echild->resource[1].start;
claim_device(bp, echild); reg = of_get_property(op->node, "reg", NULL);
if (!reg) {
kfree(client);
return NULL;
}
client->bus = reg[0];
client->address = reg[1];
claim_device(bp, op);
return client; return client;
} }
@ -172,9 +114,9 @@ struct bbc_i2c_client *bbc_i2c_attach(struct linux_ebus_child *echild)
void bbc_i2c_detach(struct bbc_i2c_client *client) void bbc_i2c_detach(struct bbc_i2c_client *client)
{ {
struct bbc_i2c_bus *bp = client->bp; struct bbc_i2c_bus *bp = client->bp;
struct linux_ebus_child *echild = client->echild; struct of_device *op = client->op;
release_device(bp, echild); release_device(bp, op);
kfree(client); kfree(client);
} }
@ -355,44 +297,43 @@ static void __init reset_one_i2c(struct bbc_i2c_bus *bp)
writeb(I2C_PCF_IDLE, bp->i2c_control_regs + 0x0); writeb(I2C_PCF_IDLE, bp->i2c_control_regs + 0x0);
} }
static int __init attach_one_i2c(struct linux_ebus_device *edev, int index) static struct bbc_i2c_bus * __init attach_one_i2c(struct of_device *op, int index)
{ {
struct bbc_i2c_bus *bp; struct bbc_i2c_bus *bp;
struct linux_ebus_child *echild; struct device_node *dp;
int entry; int entry;
bp = kzalloc(sizeof(*bp), GFP_KERNEL); bp = kzalloc(sizeof(*bp), GFP_KERNEL);
if (!bp) if (!bp)
return -ENOMEM; return NULL;
bp->i2c_control_regs = ioremap(edev->resource[0].start, 0x2); bp->i2c_control_regs = of_ioremap(&op->resource[0], 0, 0x2, "bbc_i2c_regs");
if (!bp->i2c_control_regs) if (!bp->i2c_control_regs)
goto fail; goto fail;
if (edev->num_addrs == 2) { bp->i2c_bussel_reg = of_ioremap(&op->resource[1], 0, 0x1, "bbc_i2c_bussel");
bp->i2c_bussel_reg = ioremap(edev->resource[1].start, 0x1); if (!bp->i2c_bussel_reg)
if (!bp->i2c_bussel_reg) goto fail;
goto fail;
}
bp->waiting = 0; bp->waiting = 0;
init_waitqueue_head(&bp->wq); init_waitqueue_head(&bp->wq);
if (request_irq(edev->irqs[0], bbc_i2c_interrupt, if (request_irq(op->irqs[0], bbc_i2c_interrupt,
IRQF_SHARED, "bbc_i2c", bp)) IRQF_SHARED, "bbc_i2c", bp))
goto fail; goto fail;
bp->index = index; bp->index = index;
bp->bus_edev = edev; bp->op = op;
spin_lock_init(&bp->lock); spin_lock_init(&bp->lock);
bp->next = all_bbc_i2c;
all_bbc_i2c = bp;
entry = 0; entry = 0;
for (echild = edev->children; for (dp = op->node->child;
echild && entry < 8; dp && entry < 8;
echild = echild->next, entry++) { dp = dp->sibling, entry++) {
bp->devs[entry].device = echild; struct of_device *child_op;
child_op = of_find_device_by_node(dp);
bp->devs[entry].device = child_op;
bp->devs[entry].client_claimed = 0; bp->devs[entry].client_claimed = 0;
} }
@ -406,86 +347,90 @@ static int __init attach_one_i2c(struct linux_ebus_device *edev, int index)
reset_one_i2c(bp); reset_one_i2c(bp);
return 0; return bp;
fail: fail:
if (bp->i2c_bussel_reg) if (bp->i2c_bussel_reg)
iounmap(bp->i2c_bussel_reg); of_iounmap(&op->resource[1], bp->i2c_bussel_reg, 1);
if (bp->i2c_control_regs) if (bp->i2c_control_regs)
iounmap(bp->i2c_control_regs); of_iounmap(&op->resource[0], bp->i2c_control_regs, 2);
kfree(bp); kfree(bp);
return -EINVAL; return NULL;
} }
static int __init bbc_present(void) extern int bbc_envctrl_init(struct bbc_i2c_bus *bp);
extern void bbc_envctrl_cleanup(struct bbc_i2c_bus *bp);
static int __devinit bbc_i2c_probe(struct of_device *op,
const struct of_device_id *match)
{ {
struct linux_ebus *ebus = NULL; struct bbc_i2c_bus *bp;
struct linux_ebus_device *edev = NULL;
for_each_ebus(ebus) {
for_each_ebusdev(edev, ebus) {
if (!strcmp(edev->prom_node->name, "bbc"))
return 1;
}
}
return 0;
}
extern int bbc_envctrl_init(void);
extern void bbc_envctrl_cleanup(void);
static void bbc_i2c_cleanup(void);
static int __init bbc_i2c_init(void)
{
struct linux_ebus *ebus = NULL;
struct linux_ebus_device *edev = NULL;
int err, index = 0; int err, index = 0;
if ((tlb_type != cheetah && tlb_type != cheetah_plus) || bp = attach_one_i2c(op, index);
!bbc_present()) if (!bp)
return -ENODEV; return -EINVAL;
for_each_ebus(ebus) { err = bbc_envctrl_init(bp);
for_each_ebusdev(edev, ebus) { if (err) {
if (!strcmp(edev->prom_node->name, "i2c")) { free_irq(op->irqs[0], bp);
if (!attach_one_i2c(edev, index)) if (bp->i2c_bussel_reg)
index++; of_iounmap(&op->resource[0], bp->i2c_bussel_reg, 1);
} if (bp->i2c_control_regs)
} of_iounmap(&op->resource[1], bp->i2c_control_regs, 2);
kfree(bp);
} else {
dev_set_drvdata(&op->dev, bp);
} }
if (!index)
return -ENODEV;
err = bbc_envctrl_init();
if (err)
bbc_i2c_cleanup();
return err; return err;
} }
static void bbc_i2c_cleanup(void) static int __devexit bbc_i2c_remove(struct of_device *op)
{ {
struct bbc_i2c_bus *bp = all_bbc_i2c; struct bbc_i2c_bus *bp = dev_get_drvdata(&op->dev);
bbc_envctrl_cleanup(); bbc_envctrl_cleanup(bp);
while (bp != NULL) { free_irq(op->irqs[0], bp);
struct bbc_i2c_bus *next = bp->next;
free_irq(bp->bus_edev->irqs[0], bp); if (bp->i2c_bussel_reg)
of_iounmap(&op->resource[0], bp->i2c_bussel_reg, 1);
if (bp->i2c_control_regs)
of_iounmap(&op->resource[1], bp->i2c_control_regs, 2);
if (bp->i2c_bussel_reg) kfree(bp);
iounmap(bp->i2c_bussel_reg);
if (bp->i2c_control_regs)
iounmap(bp->i2c_control_regs);
kfree(bp); return 0;
}
bp = next; static struct of_device_id bbc_i2c_match[] = {
} {
all_bbc_i2c = NULL; .name = "i2c",
.compatible = "SUNW,bbc-i2c",
},
{},
};
MODULE_DEVICE_TABLE(of, bbc_i2c_match);
static struct of_platform_driver bbc_i2c_driver = {
.name = "bbc_i2c",
.match_table = bbc_i2c_match,
.probe = bbc_i2c_probe,
.remove = __devexit_p(bbc_i2c_remove),
};
static int __init bbc_i2c_init(void)
{
return of_register_driver(&bbc_i2c_driver, &of_bus_type);
}
static void __exit bbc_i2c_exit(void)
{
of_unregister_driver(&bbc_i2c_driver);
} }
module_init(bbc_i2c_init); module_init(bbc_i2c_init);
module_exit(bbc_i2c_cleanup); module_exit(bbc_i2c_exit);
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");

75
drivers/sbus/char/bbc_i2c.h
View File

@ -1,14 +1,79 @@
/* $Id: bbc_i2c.h,v 1.2 2001/04/02 09:59:25 davem Exp $ */
#ifndef _BBC_I2C_H #ifndef _BBC_I2C_H
#define _BBC_I2C_H #define _BBC_I2C_H
#include <asm/ebus.h> #include <linux/of.h>
#include <linux/of_device.h>
#include <linux/list.h>
struct bbc_i2c_client; struct bbc_i2c_client {
struct bbc_i2c_bus *bp;
struct of_device *op;
int bus;
int address;
};
enum fan_action { FAN_SLOWER, FAN_SAME, FAN_FASTER, FAN_FULLBLAST, FAN_STATE_MAX };
struct bbc_cpu_temperature {
struct list_head bp_list;
struct list_head glob_list;
struct bbc_i2c_client *client;
int index;
/* Current readings, and history. */
s8 curr_cpu_temp;
s8 curr_amb_temp;
s8 prev_cpu_temp;
s8 prev_amb_temp;
s8 avg_cpu_temp;
s8 avg_amb_temp;
int sample_tick;
enum fan_action fan_todo[2];
#define FAN_AMBIENT 0
#define FAN_CPU 1
};
struct bbc_fan_control {
struct list_head bp_list;
struct list_head glob_list;
struct bbc_i2c_client *client;
int index;
int psupply_fan_on;
int cpu_fan_speed;
int system_fan_speed;
};
#define NUM_CHILDREN 8
struct bbc_i2c_bus {
struct bbc_i2c_bus *next;
int index;
spinlock_t lock;
void __iomem *i2c_bussel_reg;
void __iomem *i2c_control_regs;
unsigned char own, clock;
wait_queue_head_t wq;
volatile int waiting;
struct list_head temps;
struct list_head fans;
struct of_device *op;
struct {
struct of_device *device;
int client_claimed;
} devs[NUM_CHILDREN];
};
/* Probing and attachment. */ /* Probing and attachment. */
extern struct linux_ebus_child *bbc_i2c_getdev(int); extern struct of_device *bbc_i2c_getdev(struct bbc_i2c_bus *, int);
extern struct bbc_i2c_client *bbc_i2c_attach(struct linux_ebus_child *); extern struct bbc_i2c_client *bbc_i2c_attach(struct bbc_i2c_bus *bp, struct of_device *);
extern void bbc_i2c_detach(struct bbc_i2c_client *); extern void bbc_i2c_detach(struct bbc_i2c_client *);
/* Register read/write. NOTE: Blocking! */ /* Register read/write. NOTE: Blocking! */