diff options
Diffstat (limited to 'drivers/media/video')
| -rw-r--r-- | drivers/media/video/wm8775.c | 66 |
1 files changed, 38 insertions, 28 deletions
diff --git a/drivers/media/video/wm8775.c b/drivers/media/video/wm8775.c index c31a0c34b08b..869f9e7946b6 100644 --- a/drivers/media/video/wm8775.c +++ b/drivers/media/video/wm8775.c @@ -68,17 +68,15 @@ static int wm8775_write(struct i2c_client *client, int reg, u16 val) return -1; } - for (i = 0; i < 3; i++) { - if (i2c_smbus_write_byte_data(client, (reg << 1) | - (val >> 8), val & 0xff) == 0) { + for (i = 0; i < 3; i++) + if (i2c_smbus_write_byte_data(client, + (reg << 1) | (val >> 8), val & 0xff) == 0) return 0; - } - } v4l_err(client, "I2C: cannot write %03x to register R%d\n", val, reg); return -1; } -static int wm8775_command(struct i2c_client *client, unsigned int cmd, void *arg) +static int wm8775_command(struct i2c_client *client, unsigned cmd, void *arg) { struct wm8775_state *state = i2c_get_clientdata(client); struct v4l2_routing *route = arg; @@ -127,7 +125,8 @@ static int wm8775_command(struct i2c_client *client, unsigned int cmd, void *arg break; case VIDIOC_G_CHIP_IDENT: - return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_WM8775, 0); + return v4l2_chip_ident_i2c_client(client, + arg, V4L2_IDENT_WM8775, 0); case VIDIOC_LOG_STATUS: v4l_info(client, "Input: %d%s\n", state->input, @@ -168,34 +167,45 @@ static int wm8775_probe(struct i2c_client *client) if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -EIO; - v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name); + v4l_info(client, "chip found @ 0x%x (%s)\n", + client->addr << 1, client->adapter->name); state = kmalloc(sizeof(struct wm8775_state), GFP_KERNEL); - if (state == NULL) { + if (state == NULL) return -ENOMEM; - } state->input = 2; state->muted = 0; i2c_set_clientdata(client, state); - /* initialize wm8775 */ - wm8775_write(client, R23, 0x000); /* RESET */ - wm8775_write(client, R7, 0x000); /* Disable zero cross detect timeout */ - wm8775_write(client, R11, 0x021); /* Left justified, 24-bit mode */ - wm8775_write(client, R12, 0x102); /* Master mode, clock ratio 256fs */ - wm8775_write(client, R13, 0x000); /* Powered up */ - wm8775_write(client, R14, 0x1d4); /* ADC gain +2.5dB, enable zero cross */ - wm8775_write(client, R15, 0x1d4); /* ADC gain +2.5dB, enable zero cross */ - wm8775_write(client, R16, 0x1bf); /* ALC Stereo, ALC target level -1dB FS */ - /* max gain +8dB */ - wm8775_write(client, R17, 0x185); /* Enable gain control, use zero cross */ - /* detection, ALC hold time 42.6 ms */ - wm8775_write(client, R18, 0x0a2); /* ALC gain ramp up delay 34 s, */ - /* ALC gain ramp down delay 33 ms */ - wm8775_write(client, R19, 0x005); /* Enable noise gate, threshold -72dBfs */ - wm8775_write(client, R20, 0x07a); /* Transient window 4ms, lower PGA gain */ - /* limit -1dB */ - wm8775_write(client, R21, 0x102); /* LRBOTH = 1, use input 2. */ + /* Initialize wm8775 */ + + /* RESET */ + wm8775_write(client, R23, 0x000); + /* Disable zero cross detect timeout */ + wm8775_write(client, R7, 0x000); + /* Left justified, 24-bit mode */ + wm8775_write(client, R11, 0x021); + /* Master mode, clock ratio 256fs */ + wm8775_write(client, R12, 0x102); + /* Powered up */ + wm8775_write(client, R13, 0x000); + /* ADC gain +2.5dB, enable zero cross */ + wm8775_write(client, R14, 0x1d4); + /* ADC gain +2.5dB, enable zero cross */ + wm8775_write(client, R15, 0x1d4); + /* ALC Stereo, ALC target level -1dB FS max gain +8dB */ + wm8775_write(client, R16, 0x1bf); + /* Enable gain control, use zero cross detection, + ALC hold time 42.6 ms */ + wm8775_write(client, R17, 0x185); + /* ALC gain ramp up delay 34 s, ALC gain ramp down delay 33 ms */ + wm8775_write(client, R18, 0x0a2); + /* Enable noise gate, threshold -72dBfs */ + wm8775_write(client, R19, 0x005); + /* Transient window 4ms, lower PGA gain limit -1dB */ + wm8775_write(client, R20, 0x07a); + /* LRBOTH = 1, use input 2. */ + wm8775_write(client, R21, 0x102); return 0; } |