From 351ca3e31197929535418f5affc761cd9fb07428 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Mon, 15 Jun 2009 18:01:51 +0200 Subject: 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 Tested-by: Johannes Berg Tested-by: Paul Mackerras Cc: Benjamin Herrenschmidt --- drivers/macintosh/windfarm_smu_sat.c | 109 ++++++++++++++++++++--------------- 1 file changed, 63 insertions(+), 46 deletions(-) (limited to 'drivers/macintosh/windfarm_smu_sat.c') diff --git a/drivers/macintosh/windfarm_smu_sat.c b/drivers/macintosh/windfarm_smu_sat.c index 7847e981ac3..5da729e58f9 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); -- cgit v1.2.3-70-g09d2