windfarm: Convert to new-style i2c drivers

The legacy i2c binding model is going away soon, so convert the
macintosh windfarm drivers to the new model or they will break.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Tested-by: Johannes Berg <johannes@sipsolutions.net>
Tested-by: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 63 insertions, 46 deletions

diff --git a/drivers/macintosh/windfarm_smu_sat.c b/drivers/macintosh/windfarm_smu_sat.c
index 7847e981ac33..5da729e58f99 100644
--- a/drivers/macintosh/windfarm_smu_sat.c
+++ b/drivers/macintosh/windfarm_smu_sat.c
@@ -39,7 +39,7 @@ struct wf_sat {
         struct mutex            mutex;
         unsigned long           last_read; /* jiffies when cache last updated */
         u8                      cache[16];
-        struct i2c_client       i2c;
+        struct i2c_client       *i2c;
         struct device_node      *node;
 };
 
@@ -54,18 +54,6 @@ struct wf_sat_sensor {
 };
 
 #define wf_to_sat(c)    container_of(c, struct wf_sat_sensor, sens)
-#define i2c_to_sat(c)   container_of(c, struct wf_sat, i2c)
-
-static int wf_sat_attach(struct i2c_adapter *adapter);
-static int wf_sat_detach(struct i2c_client *client);
-
-static struct i2c_driver wf_sat_driver = {
-        .driver = {
-                .name           = "wf_smu_sat",
-        },
-        .attach_adapter = wf_sat_attach,
-        .detach_client  = wf_sat_detach,
-};
 
 struct smu_sdbp_header *smu_sat_get_sdb_partition(unsigned int sat_id, int id,
                                                   unsigned int *size)
@@ -81,13 +69,13 @@ struct smu_sdbp_header *smu_sat_get_sdb_partition(unsigned int sat_id, int id,
         if (sat_id > 1 || (sat = sats[sat_id]) == NULL)
                 return NULL;
 
-        err = i2c_smbus_write_word_data(&sat->i2c, 8, id << 8);
+        err = i2c_smbus_write_word_data(sat->i2c, 8, id << 8);
         if (err) {
                 printk(KERN_ERR "smu_sat_get_sdb_part wr error %d\n", err);
                 return NULL;
         }
 
-        err = i2c_smbus_read_word_data(&sat->i2c, 9);
+        err = i2c_smbus_read_word_data(sat->i2c, 9);
         if (err < 0) {
                 printk(KERN_ERR "smu_sat_get_sdb_part rd len error\n");
                 return NULL;
@@ -105,7 +93,7 @@ struct smu_sdbp_header *smu_sat_get_sdb_partition(unsigned int sat_id, int id,
                 return NULL;
 
         for (i = 0; i < len; i += 4) {
-                err = i2c_smbus_read_i2c_block_data(&sat->i2c, 0xa, 4, data);
+                err = i2c_smbus_read_i2c_block_data(sat->i2c, 0xa, 4, data);
                 if (err < 0) {
                         printk(KERN_ERR "smu_sat_get_sdb_part rd err %d\n",
                                err);
@@ -138,7 +126,7 @@ static int wf_sat_read_cache(struct wf_sat *sat)
 {
         int err;
 
-        err = i2c_smbus_read_i2c_block_data(&sat->i2c, 0x3f, 16, sat->cache);
+        err = i2c_smbus_read_i2c_block_data(sat->i2c, 0x3f, 16, sat->cache);
         if (err < 0)
                 return err;
         sat->last_read = jiffies;
@@ -161,7 +149,7 @@ static int wf_sat_get(struct wf_sensor *sr, s32 *value)
         int i, err;
         s32 val;
 
-        if (sat->i2c.adapter == NULL)
+        if (sat->i2c == NULL)
                 return -ENODEV;
 
         mutex_lock(&sat->mutex);
@@ -193,10 +181,6 @@ static void wf_sat_release(struct wf_sensor *sr)
         struct wf_sat *sat = sens->sat;
 
         if (atomic_dec_and_test(&sat->refcnt)) {
-                if (sat->i2c.adapter) {
-                        i2c_detach_client(&sat->i2c);
-                        sat->i2c.adapter = NULL;
-                }
                 if (sat->nr >= 0)
                         sats[sat->nr] = NULL;
                 kfree(sat);
@@ -212,38 +196,58 @@ static struct wf_sensor_ops wf_sat_ops = {
 
 static void wf_sat_create(struct i2c_adapter *adapter, struct device_node *dev)
 {
+        struct i2c_board_info info;
+        struct i2c_client *client;
+        const u32 *reg;
+        u8 addr;
+
+        reg = of_get_property(dev, "reg", NULL);
+        if (reg == NULL)
+                return;
+        addr = *reg;
+        DBG(KERN_DEBUG "wf_sat: creating sat at address %x\n", addr);
+
+        memset(&info, 0, sizeof(struct i2c_board_info));
+        info.addr = (addr >> 1) & 0x7f;
+        info.platform_data = dev;
+        strlcpy(info.type, "wf_sat", I2C_NAME_SIZE);
+
+        client = i2c_new_device(adapter, &info);
+        if (client == NULL) {
+                printk(KERN_ERR "windfarm: failed to attach smu-sat to i2c\n");
+                return;
+        }
+
+        /*
+         * Let i2c-core delete that device on driver removal.
+         * This is safe because i2c-core holds the core_lock mutex for us.
+         */
+        list_add_tail(&client->detected, &client->driver->clients);
+}
+
+static int wf_sat_probe(struct i2c_client *client,
+                        const struct i2c_device_id *id)
+{
+        struct device_node *dev = client->dev.platform_data;
         struct wf_sat *sat;
         struct wf_sat_sensor *sens;
         const u32 *reg;
         const char *loc, *type;
-        u8 addr, chip, core;
+        u8 chip, core;
         struct device_node *child;
         int shift, cpu, index;
         char *name;
         int vsens[2], isens[2];
 
-        reg = of_get_property(dev, "reg", NULL);
-        if (reg == NULL)
-                return;
-        addr = *reg;
-        DBG(KERN_DEBUG "wf_sat: creating sat at address %x\n", addr);
-
         sat = kzalloc(sizeof(struct wf_sat), GFP_KERNEL);
         if (sat == NULL)
-                return;
+                return -ENOMEM;
         sat->nr = -1;
         sat->node = of_node_get(dev);
         atomic_set(&sat->refcnt, 0);
         mutex_init(&sat->mutex);
-        sat->i2c.addr = (addr >> 1) & 0x7f;
-        sat->i2c.adapter = adapter;
-        sat->i2c.driver = &wf_sat_driver;
-        strncpy(sat->i2c.name, "smu-sat", I2C_NAME_SIZE-1);
-
-        if (i2c_attach_client(&sat->i2c)) {
-                printk(KERN_ERR "windfarm: failed to attach smu-sat to i2c\n");
-                goto fail;
-        }
+        sat->i2c = client;
+        i2c_set_clientdata(client, sat);
 
         vsens[0] = vsens[1] = -1;
         isens[0] = isens[1] = -1;
@@ -344,10 +348,7 @@ static void wf_sat_create(struct i2c_adapter *adapter, struct device_node *dev)
         if (sat->nr >= 0)
                 sats[sat->nr] = sat;
 
-        return;
-
- fail:
-        kfree(sat);
+        return 0;
 }
 
 static int wf_sat_attach(struct i2c_adapter *adapter)
@@ -366,16 +367,32 @@ static int wf_sat_attach(struct i2c_adapter *adapter)
         return 0;
 }
 
-static int wf_sat_detach(struct i2c_client *client)
+static int wf_sat_remove(struct i2c_client *client)
 {
-        struct wf_sat *sat = i2c_to_sat(client);
+        struct wf_sat *sat = i2c_get_clientdata(client);
 
         /* XXX TODO */
 
-        sat->i2c.adapter = NULL;
+        sat->i2c = NULL;
+        i2c_set_clientdata(client, NULL);
         return 0;
 }
 
+static const struct i2c_device_id wf_sat_id[] = {
+        { "wf_sat", 0 },
+        { }
+};
+
+static struct i2c_driver wf_sat_driver = {
+        .driver = {
+                .name           = "wf_smu_sat",
+        },
+        .attach_adapter = wf_sat_attach,
+        .probe          = wf_sat_probe,
+        .remove         = wf_sat_remove,
+        .id_table       = wf_sat_id,
+};
+
 static int __init sat_sensors_init(void)
 {
         return i2c_add_driver(&wf_sat_driver);