ASoC: tpa6130a2: Support for limiting gain (6f399115) · Commits · 戴 / test

include/sound/tpa6130a2-plat.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -31,6 +31,7 @@ enum tpa_model {
		struct tpa6130a2_platform_data {
		enum tpa_model id;
		int power_gpio;
		int limit_gain;
		};

		#endif

sound/soc/codecs/tpa6130a2.c

+68 −8

Original line number	Diff line number	Diff line
		@@ -46,6 +46,9 @@ static const char *tpa6140a2_supply_names[TPA6130A2_NUM_SUPPLIES] = {
		"AVdd",
		};

		#define TPA6130A2_GAIN_MAX 0x3f
		#define TPA6140A2_GAIN_MAX 0x1f

		/* This struct is used to save the context */
		struct tpa6130a2_data {
		struct mutex mutex;
		@@ -54,6 +57,7 @@ struct tpa6130a2_data {
		int power_gpio;
		unsigned char power_state;
		enum tpa_model id;
		int gain_limit;
		};

		static int tpa6130a2_i2c_read(int reg)
		@@ -176,6 +180,40 @@ exit:
		return ret;
		}

		static int tpa6130a2_info_volsw(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_info *uinfo)
		{
		struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
		struct tpa6130a2_data *data;

		BUG_ON(tpa6130a2_client == NULL);
		data = i2c_get_clientdata(tpa6130a2_client);

		mutex_lock(&data->mutex);
		switch (mc->reg) {
		case TPA6130A2_REG_VOL_MUTE:
		if (data->gain_limit != mc->max)
		mc->max = data->gain_limit;
		break;
		default:
		dev_err(&tpa6130a2_client->dev,
		"Invalid register: 0x02%x\n", mc->reg);
		goto out;
		}
		if (unlikely(mc->max == 1))
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
		else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;

		uinfo->count = 1;
		uinfo->value.integer.min = 0;
		uinfo->value.integer.max = mc->max;
		out:
		mutex_unlock(&data->mutex);
		return 0;
		}

		static int tpa6130a2_get_reg(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
		{
		@@ -239,6 +277,15 @@ static int tpa6130a2_set_reg(struct snd_kcontrol *kcontrol,
		return 1;
		}

		#define SOC_SINGLE_EXT_TLV_TPA(xname, xreg, xshift, xmax, xinvert, tlv_array) \
		{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
		.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ \|\
		SNDRV_CTL_ELEM_ACCESS_READWRITE,\
		.tlv.p = (tlv_array), \
		.info = tpa6130a2_info_volsw, \
		.get = tpa6130a2_get_reg, .put = tpa6130a2_set_reg, \
		.private_value = SOC_SINGLE_VALUE(xreg, xshift, xmax, xinvert) }

		/*
		* TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
		* down in gain.
		@@ -258,9 +305,8 @@ static const unsigned int tpa6130_tlv[] = {
		};

		static const struct snd_kcontrol_new tpa6130a2_controls[] = {
		SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume",
		TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
		tpa6130a2_get_reg, tpa6130a2_set_reg,
		SOC_SINGLE_EXT_TLV_TPA("TPA6130A2 Headphone Playback Volume",
		TPA6130A2_REG_VOL_MUTE, 0, TPA6130A2_GAIN_MAX, 0,
		tpa6130_tlv),
		};

		@@ -272,9 +318,8 @@ static const unsigned int tpa6140_tlv[] = {
		};

		static const struct snd_kcontrol_new tpa6140a2_controls[] = {
		SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume",
		TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
		tpa6130a2_get_reg, tpa6130a2_set_reg,
		SOC_SINGLE_EXT_TLV_TPA("TPA6140A2 Headphone Playback Volume",
		TPA6130A2_REG_VOL_MUTE, 1, TPA6140A2_GAIN_MAX, 0,
		tpa6140_tlv),
		};

		@@ -454,16 +499,31 @@ static int __devinit tpa6130a2_probe(struct i2c_client *client,
		case TPA6130A2:
		for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
		data->supplies[i].supply = tpa6130a2_supply_names[i];
		if (pdata->limit_gain > 0 &&
		pdata->limit_gain < TPA6130A2_GAIN_MAX)
		data->gain_limit = pdata->limit_gain;
		else
		data->gain_limit = TPA6130A2_GAIN_MAX;
		break;
		case TPA6140A2:
		for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
		data->supplies[i].supply = tpa6140a2_supply_names[i];;
		if (pdata->limit_gain > 0 &&
		pdata->limit_gain < TPA6140A2_GAIN_MAX)
		data->gain_limit = pdata->limit_gain;
		else
		data->gain_limit = TPA6140A2_GAIN_MAX;
		break;
		default:
		dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
		pdata->id);
		for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
		data->supplies[i].supply = tpa6130a2_supply_names[i];
		if (pdata->limit_gain > 0 &&
		pdata->limit_gain < TPA6130A2_GAIN_MAX)
		data->gain_limit = pdata->limit_gain;
		else
		data->gain_limit = TPA6130A2_GAIN_MAX;
		}

		ret = regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),

Admin message