diff options
Diffstat (limited to 'drivers/mfd/wm831x-i2c.c')
| -rw-r--r-- | drivers/mfd/wm831x-i2c.c | 76 |
1 files changed, 20 insertions, 56 deletions
diff --git a/drivers/mfd/wm831x-i2c.c b/drivers/mfd/wm831x-i2c.c index a06cbc739716..ac8da1d439da 100644 --- a/drivers/mfd/wm831x-i2c.c +++ b/drivers/mfd/wm831x-i2c.c @@ -18,67 +18,17 @@ #include <linux/delay.h> #include <linux/mfd/core.h> #include <linux/slab.h> +#include <linux/err.h> +#include <linux/regmap.h> #include <linux/mfd/wm831x/core.h> #include <linux/mfd/wm831x/pdata.h> -static int wm831x_i2c_read_device(struct wm831x *wm831x, unsigned short reg, - int bytes, void *dest) -{ - struct i2c_client *i2c = wm831x->control_data; - int ret; - u16 r = cpu_to_be16(reg); - - ret = i2c_master_send(i2c, (unsigned char *)&r, 2); - if (ret < 0) - return ret; - if (ret != 2) - return -EIO; - - ret = i2c_master_recv(i2c, dest, bytes); - if (ret < 0) - return ret; - if (ret != bytes) - return -EIO; - return 0; -} - -/* Currently we allocate the write buffer on the stack; this is OK for - * small writes - if we need to do large writes this will need to be - * revised. - */ -static int wm831x_i2c_write_device(struct wm831x *wm831x, unsigned short reg, - int bytes, void *src) -{ - struct i2c_client *i2c = wm831x->control_data; - struct i2c_msg xfer[2]; - int ret; - - reg = cpu_to_be16(reg); - - xfer[0].addr = i2c->addr; - xfer[0].flags = 0; - xfer[0].len = 2; - xfer[0].buf = (char *)® - - xfer[1].addr = i2c->addr; - xfer[1].flags = I2C_M_NOSTART; - xfer[1].len = bytes; - xfer[1].buf = (char *)src; - - ret = i2c_transfer(i2c->adapter, xfer, 2); - if (ret < 0) - return ret; - if (ret != 2) - return -EIO; - - return 0; -} - static int wm831x_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct wm831x *wm831x; + int ret; wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL); if (wm831x == NULL) @@ -86,9 +36,15 @@ static int wm831x_i2c_probe(struct i2c_client *i2c, i2c_set_clientdata(i2c, wm831x); wm831x->dev = &i2c->dev; - wm831x->control_data = i2c; - wm831x->read_dev = wm831x_i2c_read_device; - wm831x->write_dev = wm831x_i2c_write_device; + + wm831x->regmap = regmap_init_i2c(i2c, &wm831x_regmap_config); + if (IS_ERR(wm831x->regmap)) { + ret = PTR_ERR(wm831x->regmap); + dev_err(wm831x->dev, "Failed to allocate register map: %d\n", + ret); + kfree(wm831x); + return ret; + } return wm831x_device_init(wm831x, id->driver_data, i2c->irq); } @@ -109,6 +65,13 @@ static int wm831x_i2c_suspend(struct device *dev) return wm831x_device_suspend(wm831x); } +static void wm831x_i2c_shutdown(struct i2c_client *i2c) +{ + struct wm831x *wm831x = i2c_get_clientdata(i2c); + + wm831x_device_shutdown(wm831x); +} + static const struct i2c_device_id wm831x_i2c_id[] = { { "wm8310", WM8310 }, { "wm8311", WM8311 }, @@ -133,6 +96,7 @@ static struct i2c_driver wm831x_i2c_driver = { }, .probe = wm831x_i2c_probe, .remove = wm831x_i2c_remove, + .shutdown = wm831x_i2c_shutdown, .id_table = wm831x_i2c_id, }; |