linux-kernel - Re: [PATCH v4 2/3] iio: chemical: bme680: add regulators

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Message-ID: <20241130142648.62ead7fe@jic23-huawei>
Date: Sat, 30 Nov 2024 14:26:48 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: Vasileios Amoiridis <vassilisamir@...il.com>
Cc: lars@...afoo.de, robh@...nel.org, krzk+dt@...nel.org,
 conor+dt@...nel.org, andriy.shevchenko@...ux.intel.com,
 linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/3] iio: chemical: bme680: add regulators

On Thu, 28 Nov 2024 20:32:45 +0100
Vasileios Amoiridis <vassilisamir@...il.com> wrote:

> Add support for the regulators described in the dt-binding.
> 
> Signed-off-by: Vasileios Amoiridis <vassilisamir@...il.com>
> ---
>  drivers/iio/chemical/bme680_core.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/iio/chemical/bme680_core.c b/drivers/iio/chemical/bme680_core.c
> index 9783953e64e0..186e0a6cc2d7 100644
> --- a/drivers/iio/chemical/bme680_core.c
> +++ b/drivers/iio/chemical/bme680_core.c
> @@ -15,6 +15,7 @@
>  #include <linux/log2.h>
>  #include <linux/module.h>
>  #include <linux/regmap.h>
> +#include <linux/regulator/consumer.h>
>  
>  #include <linux/iio/buffer.h>
>  #include <linux/iio/iio.h>
> @@ -111,6 +112,10 @@ enum bme680_scan {
>  	BME680_GAS,
>  };
>  
> +static const char *const bme680_supply_names[] = { "vdd", "vddio" };
> +
> +#define BME680_NUM_SUPPLIES ARRAY_SIZE(bme680_supply_names)
Trivial: What benefit do we get from this define that is used in one place?

> +
>  struct bme680_data {
>  	struct regmap *regmap;
>  	struct bme680_calib bme680;
> @@ -1114,6 +1119,14 @@ int bme680_core_probe(struct device *dev, struct regmap *regmap,
>  	data->heater_dur = 150;  /* milliseconds */
>  	data->preheat_curr_mA = 0;
>  
> +	ret = devm_regulator_bulk_get_enable(dev, BME680_NUM_SUPPLIES,
	ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(bme680_supply_names),
					     bme680_supply_names);

And don't worry about slightly over 80 chars line.

> +					     bme680_supply_names);
> +	if (ret)
> +		return dev_err_probe(dev, ret,
> +				     "failed to get and enable supplies.\n");
> +
> +	fsleep(BME680_STARTUP_TIME_US);
> +
>  	ret = regmap_write(regmap, BME680_REG_SOFT_RESET, BME680_CMD_SOFTRESET);
>  	if (ret < 0)
>  		return dev_err_probe(dev, ret, "Failed to reset chip\n");