diff options
Diffstat (limited to 'sound/soc/codecs/adau1701.c')
| -rw-r--r-- | sound/soc/codecs/adau1701.c | 69 |
1 files changed, 63 insertions, 6 deletions
diff --git a/sound/soc/codecs/adau1701.c b/sound/soc/codecs/adau1701.c index dafdbe8..b6b1a77 100644 --- a/sound/soc/codecs/adau1701.c +++ b/sound/soc/codecs/adau1701.c @@ -13,6 +13,9 @@ #include <linux/i2c.h> #include <linux/delay.h> #include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_gpio.h> +#include <linux/of_device.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> @@ -87,6 +90,7 @@ #define ADAU1701_FIRMWARE "adau1701.bin" struct adau1701 { + int gpio_nreset; unsigned int dai_fmt; }; @@ -180,9 +184,37 @@ static unsigned int adau1701_read(struct snd_soc_codec *codec, unsigned int reg) return value; } -static int adau1701_load_firmware(struct snd_soc_codec *codec) +static void adau1701_reset(struct snd_soc_codec *codec) { - return process_sigma_firmware(codec->control_data, ADAU1701_FIRMWARE); + struct adau1701 *adau1701 = snd_soc_codec_get_drvdata(codec); + + if (!gpio_is_valid(adau1701->gpio_nreset)) + return; + + gpio_set_value(adau1701->gpio_nreset, 0); + /* minimum reset time is 20ns */ + udelay(1); + gpio_set_value(adau1701->gpio_nreset, 1); + /* power-up time may be as long as 85ms */ + mdelay(85); +} + +static int adau1701_init(struct snd_soc_codec *codec) +{ + int ret; + struct i2c_client *client = to_i2c_client(codec->dev); + + adau1701_reset(codec); + + ret = process_sigma_firmware(client, ADAU1701_FIRMWARE); + if (ret) { + dev_warn(codec->dev, "Failed to load firmware\n"); + return ret; + } + + snd_soc_write(codec, ADAU1701_DACSET, ADAU1701_DACSET_DACINIT); + + return 0; } static int adau1701_set_capture_pcm_format(struct snd_soc_codec *codec, @@ -452,17 +484,24 @@ static struct snd_soc_dai_driver adau1701_dai = { .symmetric_rates = 1, }; +#ifdef CONFIG_OF +static const struct of_device_id adau1701_dt_ids[] = { + { .compatible = "adi,adau1701", }, + { } +}; +MODULE_DEVICE_TABLE(of, adau1701_dt_ids); +#endif + static int adau1701_probe(struct snd_soc_codec *codec) { int ret; codec->control_data = to_i2c_client(codec->dev); - ret = adau1701_load_firmware(codec); + ret = adau1701_init(codec); if (ret) - dev_warn(codec->dev, "Failed to load firmware\n"); + return ret; - snd_soc_write(codec, ADAU1701_DACSET, ADAU1701_DACSET_DACINIT); snd_soc_write(codec, ADAU1701_DSPCTRL, ADAU1701_DSPCTRL_CR); return 0; @@ -493,12 +532,29 @@ static int adau1701_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct adau1701 *adau1701; + struct device *dev = &client->dev; + int gpio_nreset = -EINVAL; int ret; - adau1701 = devm_kzalloc(&client->dev, sizeof(*adau1701), GFP_KERNEL); + adau1701 = devm_kzalloc(dev, sizeof(*adau1701), GFP_KERNEL); if (!adau1701) return -ENOMEM; + if (dev->of_node) { + gpio_nreset = of_get_named_gpio(dev->of_node, "reset-gpio", 0); + if (gpio_nreset < 0 && gpio_nreset != -ENOENT) + return gpio_nreset; + } + + if (gpio_is_valid(gpio_nreset)) { + ret = devm_gpio_request_one(dev, gpio_nreset, GPIOF_OUT_INIT_LOW, + "ADAU1701 Reset"); + if (ret < 0) + return ret; + } + + adau1701->gpio_nreset = gpio_nreset; + i2c_set_clientdata(client, adau1701); ret = snd_soc_register_codec(&client->dev, &adau1701_codec_drv, &adau1701_dai, 1); @@ -521,6 +577,7 @@ static struct i2c_driver adau1701_i2c_driver = { .driver = { .name = "adau1701", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(adau1701_dt_ids), }, .probe = adau1701_i2c_probe, .remove = adau1701_i2c_remove, |