linux-kernel - Re: [PATCH v3 2/2] ASoC: tlv320adcx140: Add support for configuring GPIO pin

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Date:   Thu, 17 Sep 2020 06:42:02 -0500
From:   Dan Murphy <dmurphy@...com>
To:     Camel Guo <camel.guo@...s.com>, <lgirdwood@...il.com>,
        <broonie@...nel.org>, <tiwai@...e.com>, <robh+dt@...nel.org>,
        <devicetree@...r.kernel.org>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        <kernel@...s.com>, Camel Guo <camelg@...s.com>
Subject: Re: [PATCH v3 2/2] ASoC: tlv320adcx140: Add support for configuring
 GPIO pin

Camel

On 9/16/20 2:59 AM, Camel Guo wrote:
> From: Camel Guo <camelg@...s.com>
>
> Add support to configure the GPIO pin to the specific configuration.
> The GPIO pin can be configured as GPO, IRQ, SDOUT2, PDMCLK, MICBASE_EN,
> GPI, MCLK, SDIN, PDMDIN1, PDMDIN2, PDMDIN3 or PDMDIN4 and the output
> drive can be configured with various configuration.
>
> Signed-off-by: Camel Guo <camelg@...s.com>
> ---
>   v3:
>    - Add ADCX140_NUM_GPIO_CFGS avoiding using magic number
>    - Remove unneeded check on ret in adcx140_configure_gpio
>
>   sound/soc/codecs/tlv320adcx140.c | 40 ++++++++++++++++++++++++++++++++
>   sound/soc/codecs/tlv320adcx140.h |  5 ++++
>   2 files changed, 45 insertions(+)
>
> diff --git a/sound/soc/codecs/tlv320adcx140.c b/sound/soc/codecs/tlv320adcx140.c
> index f33ee604ee78..fe6fc6df66cc 100644
> --- a/sound/soc/codecs/tlv320adcx140.c
> +++ b/sound/soc/codecs/tlv320adcx140.c
> @@ -837,6 +837,42 @@ static int adcx140_configure_gpo(struct adcx140_priv *adcx140)
>   
>   }
>   
> +static int adcx140_configure_gpio(struct adcx140_priv *adcx140)
> +{
> +	int gpio_count = 0;
> +	u32 gpio_outputs[ADCX140_NUM_GPIO_CFGS];
> +	u32 gpio_output_val = 0;
> +	int ret;
> +
> +	gpio_count = device_property_count_u32(adcx140->dev,
> +			"ti,gpio-config");
> +	if (gpio_count == 0)
> +		return 0;
> +
> +	if (gpio_count != ADCX140_NUM_GPIO_CFGS)
> +		return -EINVAL;
> +
> +	ret = device_property_read_u32_array(adcx140->dev, "ti,gpio-config",
> +			gpio_outputs, gpio_count);
> +	if (ret)
> +		return ret;
> +
> +	if (gpio_outputs[0] > ADCX140_GPIO_CFG_MAX) {
> +		dev_err(adcx140->dev, "GPIO config out of range\n");
> +		return -EINVAL;
> +	}
> +
> +	if (gpio_outputs[1] > ADCX140_GPIO_DRV_MAX) {
> +		dev_err(adcx140->dev, "GPIO drive out of range\n");
> +		return -EINVAL;
> +	}
> +
> +	gpio_output_val = gpio_outputs[0] << ADCX140_GPIO_SHIFT
> +		| gpio_outputs[1];
> +
> +	return regmap_write(adcx140->regmap, ADCX140_GPIO_CFG0, gpio_output_val);
> +}
> +
>   static int adcx140_codec_probe(struct snd_soc_component *component)
>   {
>   	struct adcx140_priv *adcx140 = snd_soc_component_get_drvdata(component);
> @@ -934,6 +970,10 @@ static int adcx140_codec_probe(struct snd_soc_component *component)
>   			return ret;
>   	}
>   
> +	ret = adcx140_configure_gpio(adcx140);
> +	if (ret)
> +		return ret;
> +
>   	ret = adcx140_configure_gpo(adcx140);
>   	if (ret)
>   		goto out;
> diff --git a/sound/soc/codecs/tlv320adcx140.h b/sound/soc/codecs/tlv320adcx140.h
> index eedbc1d7221f..9d04dec374d1 100644
> --- a/sound/soc/codecs/tlv320adcx140.h
> +++ b/sound/soc/codecs/tlv320adcx140.h
> @@ -145,4 +145,9 @@
>   #define ADCX140_GPO_CFG_MAX		4
>   #define ADCX140_GPO_DRV_MAX		5
>   
> +#define ADCX140_NUM_GPIO_CFGS		2
> +#define ADCX140_GPIO_SHIFT		4
> +#define ADCX140_GPIO_CFG_MAX		15
> +#define ADCX140_GPIO_DRV_MAX		5
> +
>   #endif /* _TLV320ADCX140_ */
Acked-by: Dan Murphy <dmurphy@...com>