From: fengchunguo chunguo.feng@amlogic.com
Added reset_gpio configuration for i2c probe successfully. If not,i2c address can't be found rightly.
Error information: max98373 3-0031: Failed to read: 0x21FF
Fixed: [3.761299@3] max98373 3-0031: MAX98373 revisionID: 0x43 [3.828911@3] asoc-aml-card auge_sound: max98373-aif1 <-> TDM-B mapping ok
Signed-off-by: fengchunguo chunguo.feng@amlogic.com --- sound/soc/codecs/max98373.c | 34 ++++++++++++++++++++++++++++++---- sound/soc/codecs/max98373.h | 1 + 2 files changed, 31 insertions(+), 4 deletions(-)
diff --git a/sound/soc/codecs/max98373.c b/sound/soc/codecs/max98373.c index 528695cd6a1c..9a1eb7222357 100644 --- a/sound/soc/codecs/max98373.c +++ b/sound/soc/codecs/max98373.c @@ -12,6 +12,7 @@ #include <sound/pcm_params.h> #include <sound/soc.h> #include <linux/gpio.h> +#include <linux/of.h> #include <linux/of_gpio.h> #include <sound/tlv.h> #include "max98373.h" @@ -895,6 +896,17 @@ static void max98373_slot_config(struct i2c_client *i2c, else max98373->i_slot = 1;
+ max98373->reset_gpio = of_get_named_gpio(dev->of_node, + "maxim,reset-gpio", 0); + if (!gpio_is_valid(max98373->reset_gpio)) { + dev_err(dev, "Looking up %s property in node %s failed %d\n", + "maxim,reset-gpio", dev->of_node->full_name, + max98373->reset_gpio); + } else { + dev_dbg(dev, "maxim,reset-gpio=%d", + max98373->reset_gpio); + } + if (!device_property_read_u32(dev, "maxim,spkfb-slot-no", &value)) max98373->spkfb_slot = value & 0xF; else @@ -923,7 +935,6 @@ static int max98373_i2c_probe(struct i2c_client *i2c, else max98373->interleave_mode = false;
- /* regmap initialization */ max98373->regmap = devm_regmap_init_i2c(i2c, &max98373_regmap); @@ -934,6 +945,24 @@ static int max98373_i2c_probe(struct i2c_client *i2c, return ret; }
+ /* voltage/current slot & gpio configuration */ + max98373_slot_config(i2c, max98373); + + /* Power on device */ + if (gpio_is_valid(max98373->reset_gpio)) { + ret = gpio_request(max98373->reset_gpio, "MAX98373_RESET"); + if (ret) { + dev_err(&i2c->dev, "%s: Failed to request gpio %d\n", + __func__, max98373->reset_gpio); + gpio_free(max98373->reset_gpio); + return -EINVAL; + } + gpio_direction_output(max98373->reset_gpio, 0); + msleep(50); + gpio_direction_output(max98373->reset_gpio, 1); + msleep(20); + } + /* Check Revision ID */ ret = regmap_read(max98373->regmap, MAX98373_R21FF_REV_ID, ®); @@ -944,9 +973,6 @@ static int max98373_i2c_probe(struct i2c_client *i2c, } dev_info(&i2c->dev, "MAX98373 revisionID: 0x%02X\n", reg);
- /* voltage/current slot configuration */ - max98373_slot_config(i2c, max98373); - /* codec registeration */ ret = devm_snd_soc_register_component(&i2c->dev, &soc_codec_dev_max98373, max98373_dai, ARRAY_SIZE(max98373_dai)); diff --git a/sound/soc/codecs/max98373.h b/sound/soc/codecs/max98373.h index f6a37aa02f26..533d2053f608 100644 --- a/sound/soc/codecs/max98373.h +++ b/sound/soc/codecs/max98373.h @@ -203,6 +203,7 @@
struct max98373_priv { struct regmap *regmap; + int reset_gpio; unsigned int v_slot; unsigned int i_slot; unsigned int spkfb_slot;