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path: root/drivers/macintosh/smu.c
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Diffstat (limited to 'drivers/macintosh/smu.c')
-rw-r--r--drivers/macintosh/smu.c82
1 files changed, 45 insertions, 37 deletions
diff --git a/drivers/macintosh/smu.c b/drivers/macintosh/smu.c
index 77ad192962c..4eab93aa570 100644
--- a/drivers/macintosh/smu.c
+++ b/drivers/macintosh/smu.c
@@ -32,9 +32,12 @@
#include <linux/completion.h>
#include <linux/miscdevice.h>
#include <linux/delay.h>
-#include <linux/sysdev.h>
#include <linux/poll.h>
#include <linux/mutex.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/slab.h>
#include <asm/byteorder.h>
#include <asm/io.h>
@@ -43,10 +46,7 @@
#include <asm/pmac_feature.h>
#include <asm/smu.h>
#include <asm/sections.h>
-#include <asm/abs_addr.h>
#include <asm/uaccess.h>
-#include <asm/of_device.h>
-#include <asm/of_platform.h>
#define VERSION "0.7"
#define AUTHOR "(c) 2005 Benjamin Herrenschmidt, IBM Corp."
@@ -73,7 +73,7 @@ struct smu_cmd_buf {
struct smu_device {
spinlock_t lock;
struct device_node *of_node;
- struct of_device *of_dev;
+ struct platform_device *of_dev;
int doorbell; /* doorbell gpio */
u32 __iomem *db_buf; /* doorbell buffer */
struct device_node *db_node;
@@ -95,6 +95,7 @@ struct smu_device {
* I don't think there will ever be more than one SMU, so
* for now, just hard code that
*/
+static DEFINE_MUTEX(smu_mutex);
static struct smu_device *smu;
static DEFINE_MUTEX(smu_part_access);
static int smu_irq_inited;
@@ -120,11 +121,7 @@ static void smu_start_cmd(void)
DPRINTK("SMU: starting cmd %x, %d bytes data\n", cmd->cmd,
cmd->data_len);
- DPRINTK("SMU: data buffer: %02x %02x %02x %02x %02x %02x %02x %02x\n",
- ((u8 *)cmd->data_buf)[0], ((u8 *)cmd->data_buf)[1],
- ((u8 *)cmd->data_buf)[2], ((u8 *)cmd->data_buf)[3],
- ((u8 *)cmd->data_buf)[4], ((u8 *)cmd->data_buf)[5],
- ((u8 *)cmd->data_buf)[6], ((u8 *)cmd->data_buf)[7]);
+ DPRINTK("SMU: data buffer: %8ph\n", cmd->data_buf);
/* Fill the SMU command buffer */
smu->cmd_buf->cmd = cmd->cmd;
@@ -474,6 +471,7 @@ int __init smu_init (void)
{
struct device_node *np;
const u32 *data;
+ int ret = 0;
np = of_find_node_by_type(NULL, "smu");
if (np == NULL)
@@ -483,13 +481,11 @@ int __init smu_init (void)
if (smu_cmdbuf_abs == 0) {
printk(KERN_ERR "SMU: Command buffer not allocated !\n");
- return -EINVAL;
+ ret = -EINVAL;
+ goto fail_np;
}
smu = alloc_bootmem(sizeof(struct smu_device));
- if (smu == NULL)
- return -ENOMEM;
- memset(smu, 0, sizeof(*smu));
spin_lock_init(&smu->lock);
INIT_LIST_HEAD(&smu->cmd_list);
@@ -502,19 +498,19 @@ int __init smu_init (void)
* 32 bits value safely
*/
smu->cmd_buf_abs = (u32)smu_cmdbuf_abs;
- smu->cmd_buf = (struct smu_cmd_buf *)abs_to_virt(smu_cmdbuf_abs);
+ smu->cmd_buf = __va(smu_cmdbuf_abs);
smu->db_node = of_find_node_by_name(NULL, "smu-doorbell");
if (smu->db_node == NULL) {
printk(KERN_ERR "SMU: Can't find doorbell GPIO !\n");
- goto fail;
+ ret = -ENXIO;
+ goto fail_bootmem;
}
data = of_get_property(smu->db_node, "reg", NULL);
if (data == NULL) {
- of_node_put(smu->db_node);
- smu->db_node = NULL;
printk(KERN_ERR "SMU: Can't find doorbell GPIO address !\n");
- goto fail;
+ ret = -ENXIO;
+ goto fail_db_node;
}
/* Current setup has one doorbell GPIO that does both doorbell
@@ -548,7 +544,8 @@ int __init smu_init (void)
smu->db_buf = ioremap(0x8000860c, 0x1000);
if (smu->db_buf == NULL) {
printk(KERN_ERR "SMU: Can't map doorbell buffer pointer !\n");
- goto fail;
+ ret = -ENXIO;
+ goto fail_msg_node;
}
/* U3 has an issue with NAP mode when issuing SMU commands */
@@ -559,10 +556,17 @@ int __init smu_init (void)
sys_ctrler = SYS_CTRLER_SMU;
return 0;
- fail:
+fail_msg_node:
+ if (smu->msg_node)
+ of_node_put(smu->msg_node);
+fail_db_node:
+ of_node_put(smu->db_node);
+fail_bootmem:
+ free_bootmem(__pa(smu), sizeof(struct smu_device));
smu = NULL;
- return -ENXIO;
-
+fail_np:
+ of_node_put(np);
+ return ret;
}
@@ -636,8 +640,7 @@ static void smu_expose_childs(struct work_struct *unused)
static DECLARE_WORK(smu_expose_childs_work, smu_expose_childs);
-static int smu_platform_probe(struct of_device* dev,
- const struct of_device_id *match)
+static int smu_platform_probe(struct platform_device* dev)
{
if (!smu)
return -ENODEV;
@@ -652,7 +655,7 @@ static int smu_platform_probe(struct of_device* dev,
return 0;
}
-static struct of_device_id smu_platform_match[] =
+static const struct of_device_id smu_platform_match[] =
{
{
.type = "smu",
@@ -660,30 +663,30 @@ static struct of_device_id smu_platform_match[] =
{},
};
-static struct of_platform_driver smu_of_platform_driver =
+static struct platform_driver smu_of_platform_driver =
{
- .name = "smu",
- .match_table = smu_platform_match,
+ .driver = {
+ .name = "smu",
+ .owner = THIS_MODULE,
+ .of_match_table = smu_platform_match,
+ },
.probe = smu_platform_probe,
};
static int __init smu_init_sysfs(void)
{
/*
- * Due to sysfs bogosity, a sysdev is not a real device, so
- * we should in fact create both if we want sysdev semantics
- * for power management.
* For now, we don't power manage machines with an SMU chip,
* I'm a bit too far from figuring out how that works with those
* new chipsets, but that will come back and bite us
*/
- of_register_platform_driver(&smu_of_platform_driver);
+ platform_driver_register(&smu_of_platform_driver);
return 0;
}
device_initcall(smu_init_sysfs);
-struct of_device *smu_get_ofdev(void)
+struct platform_device *smu_get_ofdev(void)
{
if (!smu)
return NULL;
@@ -991,7 +994,7 @@ static struct smu_sdbp_header *smu_create_sdb_partition(int id)
"%02x !\n", id, hdr->id);
goto failure;
}
- if (prom_add_property(smu->of_node, prop)) {
+ if (of_add_property(smu->of_node, prop)) {
printk(KERN_DEBUG "SMU: Failed creating sdb-partition-%02x "
"property !\n", id);
goto failure;
@@ -1083,10 +1086,12 @@ static int smu_open(struct inode *inode, struct file *file)
pp->mode = smu_file_commands;
init_waitqueue_head(&pp->wait);
+ mutex_lock(&smu_mutex);
spin_lock_irqsave(&smu_clist_lock, flags);
list_add(&pp->list, &smu_clist);
spin_unlock_irqrestore(&smu_clist_lock, flags);
file->private_data = pp;
+ mutex_unlock(&smu_mutex);
return 0;
}
@@ -1172,8 +1177,10 @@ static ssize_t smu_read_command(struct file *file, struct smu_private *pp,
return -EOVERFLOW;
spin_lock_irqsave(&pp->lock, flags);
if (pp->cmd.status == 1) {
- if (file->f_flags & O_NONBLOCK)
+ if (file->f_flags & O_NONBLOCK) {
+ spin_unlock_irqrestore(&pp->lock, flags);
return -EAGAIN;
+ }
add_wait_queue(&pp->wait, &wait);
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
@@ -1250,7 +1257,8 @@ static unsigned int smu_fpoll(struct file *file, poll_table *wait)
if (pp->busy && pp->cmd.status != 1)
mask |= POLLIN;
spin_unlock_irqrestore(&pp->lock, flags);
- } if (pp->mode == smu_file_events) {
+ }
+ if (pp->mode == smu_file_events) {
/* Not yet implemented */
}
return mask;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 18:07:05 +0000