From: "Andrew F. Davis" <afd@ti.com> To: "Liam Girdwood" <lgirdwood@gmail.com>, "Mark Brown" <broonie@kernel.org>, "Rob Herring" <robh+dt@kernel.org>, "Mark Rutland" <mark.rutland@arm.com>, "Benoît Cousson" <bcousson@baylibre.com>, "Tony Lindgren" <tony@atomide.com> Cc: <alsa-devel@alsa-project.org>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>, "Andrew F . Davis" <afd@ti.com> Subject: [PATCH 11/17] ASoC: tlv320aic31xx: Reset registers during probe Date: Wed, 8 Nov 2017 18:27:35 -0600 [thread overview] Message-ID: <20171109002741.10897-12-afd@ti.com> (raw) In-Reply-To: <20171109002741.10897-1-afd@ti.com> Add a reset function that toggles the reset line if available or uses the software reset command otherwise. Use this in probe to ensure the registers are in a sane state. This is useful when the driver module is reloaded, or after Kexec, warm-reboots, etc.. Signed-off-by: Andrew F. Davis <afd@ti.com> --- sound/soc/codecs/tlv320aic31xx.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c index e58b7a4e0402..98e9ba3ee708 100644 --- a/sound/soc/codecs/tlv320aic31xx.c +++ b/sound/soc/codecs/tlv320aic31xx.c @@ -1037,6 +1037,24 @@ static int aic31xx_set_dai_sysclk(struct snd_soc_dai *codec_dai, return 0; } +static int aic31xx_reset(struct aic31xx_priv *aic31xx) +{ + int ret = 0; + + if (aic31xx->gpio_reset) { + gpiod_set_value(aic31xx->gpio_reset, 1); + ndelay(10); /* At least 10ns */ + gpiod_set_value(aic31xx->gpio_reset, 0); + } else { + ret = regmap_write(aic31xx->regmap, AIC31XX_RESET, 1); + if (ret < 0) + dev_err(aic31xx->dev, "Could not reset device\n"); + } + mdelay(1); /* At least 1ms */ + + return ret; +} + static int aic31xx_regulator_event(struct notifier_block *nb, unsigned long event, void *data) { @@ -1362,6 +1380,9 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c, return ret; } + /* Reset device registers for a consistent power-on like state */ + aic31xx_reset(aic31xx); + if (aic31xx->codec_type & DAC31XX_BIT) return snd_soc_register_codec(&i2c->dev, &soc_codec_driver_aic31xx, -- 2.15.0
WARNING: multiple messages have this Message-ID (diff)
From: "Andrew F. Davis" <afd@ti.com> To: "Liam Girdwood" <lgirdwood@gmail.com>, "Mark Brown" <broonie@kernel.org>, "Rob Herring" <robh+dt@kernel.org>, "Mark Rutland" <mark.rutland@arm.com>, "Benoît Cousson" <bcousson@baylibre.com>, "Tony Lindgren" <tony@atomide.com> Cc: alsa-devel@alsa-project.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, "Andrew F . Davis" <afd@ti.com> Subject: [PATCH 11/17] ASoC: tlv320aic31xx: Reset registers during probe Date: Wed, 8 Nov 2017 18:27:35 -0600 [thread overview] Message-ID: <20171109002741.10897-12-afd@ti.com> (raw) In-Reply-To: <20171109002741.10897-1-afd@ti.com> Add a reset function that toggles the reset line if available or uses the software reset command otherwise. Use this in probe to ensure the registers are in a sane state. This is useful when the driver module is reloaded, or after Kexec, warm-reboots, etc.. Signed-off-by: Andrew F. Davis <afd@ti.com> --- sound/soc/codecs/tlv320aic31xx.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c index e58b7a4e0402..98e9ba3ee708 100644 --- a/sound/soc/codecs/tlv320aic31xx.c +++ b/sound/soc/codecs/tlv320aic31xx.c @@ -1037,6 +1037,24 @@ static int aic31xx_set_dai_sysclk(struct snd_soc_dai *codec_dai, return 0; } +static int aic31xx_reset(struct aic31xx_priv *aic31xx) +{ + int ret = 0; + + if (aic31xx->gpio_reset) { + gpiod_set_value(aic31xx->gpio_reset, 1); + ndelay(10); /* At least 10ns */ + gpiod_set_value(aic31xx->gpio_reset, 0); + } else { + ret = regmap_write(aic31xx->regmap, AIC31XX_RESET, 1); + if (ret < 0) + dev_err(aic31xx->dev, "Could not reset device\n"); + } + mdelay(1); /* At least 1ms */ + + return ret; +} + static int aic31xx_regulator_event(struct notifier_block *nb, unsigned long event, void *data) { @@ -1362,6 +1380,9 @@ static int aic31xx_i2c_probe(struct i2c_client *i2c, return ret; } + /* Reset device registers for a consistent power-on like state */ + aic31xx_reset(aic31xx); + if (aic31xx->codec_type & DAC31XX_BIT) return snd_soc_register_codec(&i2c->dev, &soc_codec_driver_aic31xx, -- 2.15.0
next prev parent reply other threads:[~2017-11-09 0:30 UTC|newest] Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-11-09 0:27 [PATCH 00/17] Add Headphone Detection to TLV320AIC31xx Driver Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis 2017-11-09 0:27 ` [PATCH 01/17] ASoC: tlv320aic31xx: General source formatting cleanup Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis 2017-11-09 12:41 ` Mark Brown 2017-11-09 12:41 ` Mark Brown 2017-11-09 14:13 ` Andrew F. Davis 2017-11-09 14:13 ` Andrew F. Davis 2017-11-09 16:15 ` Mark Brown 2017-11-09 16:15 ` Mark Brown 2017-11-09 0:27 ` [PATCH 02/17] ASoC: tlv320aic31xx: Reformat header file using GENMASK and BIT macros Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis 2017-11-09 0:27 ` [PATCH 03/17] ASoC: tlv320aic31xx: Fix GPIO1 register definition Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis 2017-11-09 12:45 ` Mark Brown 2017-11-09 12:45 ` Mark Brown 2017-11-09 14:32 ` Andrew F. Davis 2017-11-09 14:32 ` Andrew F. Davis 2017-11-09 0:27 ` [PATCH 04/17] ASoC: tlv320aic31xx: Merge init function into probe Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis 2017-12-01 13:43 ` Applied "ASoC: tlv320aic31xx: Merge init function into probe" to the asoc tree Mark Brown 2017-11-09 0:27 ` [PATCH 05/17] ASoC: tlv320aic31xx: Switch GPIO handling to use gpiod_* API Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis 2017-12-01 13:43 ` Applied "ASoC: tlv320aic31xx: Switch GPIO handling to use gpiod_* API" to the asoc tree Mark Brown 2017-11-09 0:27 ` [PATCH 06/17] ASoC: tlv320aic31xx: Remove platform data Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis 2017-11-09 0:27 ` [PATCH 07/17] ASoC: tlv320aic31xx: Add MICBIAS off setting Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis 2017-11-15 15:30 ` Rob Herring 2017-11-15 15:30 ` Rob Herring 2017-11-09 0:27 ` [PATCH 08/17] ASoC: tlv320aic31xx: Check clock and divider before division Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis 2017-12-01 13:43 ` Applied "ASoC: tlv320aic31xx: Check clock and divider before division" to the asoc tree Mark Brown 2017-11-09 0:27 ` [PATCH 09/17] ASoC: tlv320aic31xx: Add CODEC clock slave support Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis 2017-11-09 0:27 ` [PATCH 10/17] ASoC: tlv320aic31xx: Fix inverted BCLK handling Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis [this message] 2017-11-09 0:27 ` [PATCH 11/17] ASoC: tlv320aic31xx: Reset registers during probe Andrew F. Davis 2017-11-09 0:27 ` [PATCH 12/17] ASoC: tlv320aic31xx: Add short circuit detection support Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis 2017-11-09 0:27 ` [PATCH 13/17] ASoC: tlv320aic31xx: Add overflow " Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis 2017-11-09 0:27 ` [PATCH 14/17] ASoC: tlv320aic31xx: Add headphone/headset detection Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis 2017-11-09 0:27 ` [PATCH 15/17] ASoC: tlv320aic31xx: Add button press detection Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis 2017-11-09 0:27 ` [PATCH 16/17] NOT FOR MERGING: Add TLV320DAC3101 to BBB for testing Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis 2017-11-09 0:27 ` [PATCH 17/17] NOT FOR MERGING: Add demo jack detection policy " Andrew F. Davis 2017-11-09 0:27 ` Andrew F. Davis
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