diff options
Diffstat (limited to 'drivers/mfd/wm8400-core.c')
| -rw-r--r-- | drivers/mfd/wm8400-core.c | 106 |
1 files changed, 29 insertions, 77 deletions
diff --git a/drivers/mfd/wm8400-core.c b/drivers/mfd/wm8400-core.c index 597f82edacaa..e06ba9440cdb 100644 --- a/drivers/mfd/wm8400-core.c +++ b/drivers/mfd/wm8400-core.c @@ -13,11 +13,13 @@ */ #include <linux/bug.h> +#include <linux/err.h> #include <linux/i2c.h> #include <linux/kernel.h> #include <linux/mfd/core.h> #include <linux/mfd/wm8400-private.h> #include <linux/mfd/wm8400-audio.h> +#include <linux/regmap.h> #include <linux/slab.h> static struct { @@ -123,14 +125,9 @@ static int wm8400_read(struct wm8400 *wm8400, u8 reg, int num_regs, u16 *dest) /* If there are any volatile reads then read back the entire block */ for (i = reg; i < reg + num_regs; i++) if (reg_data[i].vol) { - ret = wm8400->read_dev(wm8400->io_data, reg, - num_regs, dest); - if (ret != 0) - return ret; - for (i = 0; i < num_regs; i++) - dest[i] = be16_to_cpu(dest[i]); - - return 0; + ret = regmap_bulk_read(wm8400->regmap, reg, dest, + num_regs); + return ret; } /* Otherwise use the cache */ @@ -149,14 +146,11 @@ static int wm8400_write(struct wm8400 *wm8400, u8 reg, int num_regs, for (i = 0; i < num_regs; i++) { BUG_ON(!reg_data[reg + i].writable); wm8400->reg_cache[reg + i] = src[i]; - src[i] = cpu_to_be16(src[i]); + ret = regmap_write(wm8400->regmap, reg, src[i]); + if (ret != 0) + return ret; } - /* Do the actual I/O */ - ret = wm8400->write_dev(wm8400->io_data, reg, num_regs, src); - if (ret != 0) - return -EIO; - return 0; } @@ -270,14 +264,14 @@ static int wm8400_init(struct wm8400 *wm8400, dev_set_drvdata(wm8400->dev, wm8400); /* Check that this is actually a WM8400 */ - ret = wm8400->read_dev(wm8400->io_data, WM8400_RESET_ID, 1, ®); + ret = regmap_read(wm8400->regmap, WM8400_RESET_ID, &i); if (ret != 0) { dev_err(wm8400->dev, "Chip ID register read failed\n"); return -EIO; } - if (be16_to_cpu(reg) != reg_data[WM8400_RESET_ID].default_val) { + if (i != reg_data[WM8400_RESET_ID].default_val) { dev_err(wm8400->dev, "Device is not a WM8400, ID is %x\n", - be16_to_cpu(reg)); + reg); return -ENODEV; } @@ -285,9 +279,8 @@ static int wm8400_init(struct wm8400 *wm8400, * is a PMIC we can't reset it safely so initialise the register * cache from the hardware. */ - ret = wm8400->read_dev(wm8400->io_data, 0, - ARRAY_SIZE(wm8400->reg_cache), - wm8400->reg_cache); + ret = regmap_raw_read(wm8400->regmap, 0, wm8400->reg_cache, + ARRAY_SIZE(wm8400->reg_cache)); if (ret != 0) { dev_err(wm8400->dev, "Register cache read failed\n"); return -EIO; @@ -337,60 +330,13 @@ static void wm8400_release(struct wm8400 *wm8400) mfd_remove_devices(wm8400->dev); } -#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) -static int wm8400_i2c_read(void *io_data, char reg, int count, u16 *dest) -{ - struct i2c_client *i2c = io_data; - struct i2c_msg xfer[2]; - int ret; - - /* Write register */ - xfer[0].addr = i2c->addr; - xfer[0].flags = 0; - xfer[0].len = 1; - xfer[0].buf = ® - - /* Read data */ - xfer[1].addr = i2c->addr; - xfer[1].flags = I2C_M_RD; - xfer[1].len = count * sizeof(u16); - xfer[1].buf = (u8 *)dest; - - ret = i2c_transfer(i2c->adapter, xfer, 2); - if (ret == 2) - ret = 0; - else if (ret >= 0) - ret = -EIO; - - return ret; -} - -static int wm8400_i2c_write(void *io_data, char reg, int count, const u16 *src) -{ - struct i2c_client *i2c = io_data; - u8 *msg; - int ret; - - /* We add 1 byte for device register - ideally I2C would gather. */ - msg = kmalloc((count * sizeof(u16)) + 1, GFP_KERNEL); - if (msg == NULL) - return -ENOMEM; - - msg[0] = reg; - memcpy(&msg[1], src, count * sizeof(u16)); - - ret = i2c_master_send(i2c, msg, (count * sizeof(u16)) + 1); - - if (ret == (count * 2) + 1) - ret = 0; - else if (ret >= 0) - ret = -EIO; - - kfree(msg); - - return ret; -} +static const struct regmap_config wm8400_regmap_config = { + .reg_bits = 8, + .val_bits = 16, + .max_register = WM8400_REGISTER_COUNT - 1, +}; +#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) static int wm8400_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { @@ -403,18 +349,23 @@ static int wm8400_i2c_probe(struct i2c_client *i2c, goto err; } - wm8400->io_data = i2c; - wm8400->read_dev = wm8400_i2c_read; - wm8400->write_dev = wm8400_i2c_write; + wm8400->regmap = regmap_init_i2c(i2c, &wm8400_regmap_config); + if (IS_ERR(wm8400->regmap)) { + ret = PTR_ERR(wm8400->regmap); + goto struct_err; + } + wm8400->dev = &i2c->dev; i2c_set_clientdata(i2c, wm8400); ret = wm8400_init(wm8400, i2c->dev.platform_data); if (ret != 0) - goto struct_err; + goto map_err; return 0; +map_err: + regmap_exit(wm8400->regmap); struct_err: kfree(wm8400); err: @@ -426,6 +377,7 @@ static int wm8400_i2c_remove(struct i2c_client *i2c) struct wm8400 *wm8400 = i2c_get_clientdata(i2c); wm8400_release(wm8400); + regmap_exit(wm8400->regmap); kfree(wm8400); return 0; |