static int __init envctrl_init(void)
{
#ifdef CONFIG_PCI
struct linux_ebus *ebus = NULL;
struct linux_ebus_device *edev = NULL;
struct linux_ebus_child *edev_child = NULL;
int i = 0;
/* Traverse through ebus and ebus device list for i2c device and
* adc and gpio nodes.
*/
for_each_ebus(ebus) {
for_each_ebusdev(edev, ebus) {
if (!strcmp(edev->prom_name, "i2c")) {
i2c = ioremap( edev->resource[0].start,
sizeof(struct pcf8584_reg));
for_each_edevchild(edev, edev_child) {
if (!strcmp("gpio", edev_child->prom_name)) {
i2c_childlist[i].i2ctype = I2C_GPIO;
envctrl_init_i2c_child(edev_child, &(i2c_childlist[i++]));
}
if (!strcmp("adc", edev_child->prom_name)) {
i2c_childlist[i].i2ctype = I2C_ADC;
envctrl_init_i2c_child(edev_child, &(i2c_childlist[i++]));
}
}
goto done;
}
}
}
static int __init envctrl_init(void)
{
#ifdef CONFIG_PCI
struct linux_ebus *ebus = NULL;
struct linux_ebus_device *edev = NULL;
struct linux_ebus_child *edev_child = NULL;
int err, i = 0;
for_each_ebus(ebus) {
for_each_ebusdev(edev, ebus) {
if (!strcmp(edev->prom_name, "bbc")) {
/* If we find a boot-bus controller node,
* then this envctrl driver is not for us.
*/
return -ENODEV;
}
}
}
/* Traverse through ebus and ebus device list for i2c device and
* adc and gpio nodes.
*/
for_each_ebus(ebus) {
for_each_ebusdev(edev, ebus) {
if (!strcmp(edev->prom_name, "i2c")) {
i2c = ioremap( edev->resource[0].start,
sizeof(struct pcf8584_reg));
for_each_edevchild(edev, edev_child) {
if (!strcmp("gpio", edev_child->prom_name)) {
i2c_childlist[i].i2ctype = I2C_GPIO;
envctrl_init_i2c_child(edev_child, &(i2c_childlist[i++]));
}
if (!strcmp("adc", edev_child->prom_name)) {
i2c_childlist[i].i2ctype = I2C_ADC;
envctrl_init_i2c_child(edev_child, &(i2c_childlist[i++]));
}
}
goto done;
}
}
}
static int __devinit envctrl_probe(struct of_device *op,
const struct of_device_id *match)
{
struct device_node *dp;
int index, err;
if (i2c)
return -EINVAL;
i2c = of_ioremap(&op->resource[0], 0, 0x2, DRIVER_NAME);
if (!i2c)
return -ENOMEM;
index = 0;
dp = op->node->child;
while (dp) {
if (!strcmp(dp->name, "gpio")) {
i2c_childlist[index].i2ctype = I2C_GPIO;
envctrl_init_i2c_child(dp, &(i2c_childlist[index++]));
} else if (!strcmp(dp->name, "adc")) {
i2c_childlist[index].i2ctype = I2C_ADC;
envctrl_init_i2c_child(dp, &(i2c_childlist[index++]));
}
dp = dp->sibling;
}
/* Set device address. */
writeb(CONTROL_PIN, i2c + PCF8584_CSR);
writeb(PCF8584_ADDRESS, i2c + PCF8584_DATA);
/* Set system clock and SCL frequencies. */
writeb(CONTROL_PIN | CONTROL_ES1, i2c + PCF8584_CSR);
writeb(CLK_4_43 | BUS_CLK_90, i2c + PCF8584_DATA);
/* Enable serial interface. */
writeb(CONTROL_PIN | CONTROL_ES0 | CONTROL_ACK, i2c + PCF8584_CSR);
udelay(200);
/* Register the device as a minor miscellaneous device. */
err = misc_register(&envctrl_dev);
if (err) {
printk(KERN_ERR PFX "Unable to get misc minor %d\n",
envctrl_dev.minor);
goto out_iounmap;
}
/* Note above traversal routine post-incremented 'i' to accommodate
* a next child device, so we decrement before reverse-traversal of
* child devices.
*/
printk(KERN_INFO PFX "Initialized ");
for (--index; index >= 0; --index) {
printk("[%s 0x%lx]%s",
(I2C_ADC == i2c_childlist[index].i2ctype) ? "adc" :
((I2C_GPIO == i2c_childlist[index].i2ctype) ? "gpio" : "unknown"),
i2c_childlist[index].addr, (0 == index) ? "\n" : " ");
}
kenvctrld_task = kthread_run(kenvctrld, NULL, "kenvctrld");
if (IS_ERR(kenvctrld_task)) {
err = PTR_ERR(kenvctrld_task);
goto out_deregister;
}
return 0;
out_deregister:
misc_deregister(&envctrl_dev);
out_iounmap:
of_iounmap(&op->resource[0], i2c, 0x2);
for (index = 0; index < ENVCTRL_MAX_CPU * 2; index++)
kfree(i2c_childlist[index].tables);
return err;
}