linux-kernel - Re: [PATCH 1/5] iio: inv_mpu6050: Cleanup hw

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Date:	Mon, 25 Apr 2016 19:41:23 +0100
From:	Jonathan Cameron <jic23@...nel.org>
To:	Crestez Dan Leonard <leonard.crestez@...el.com>,
	linux-iio@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Hartmut Knaack <knaack.h@....de>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Peter Meerwald-Stadler <pmeerw@...erw.net>,
	Daniel Baluta <daniel.baluta@...el.com>,
	Ge Gao <ggao@...ensense.com>
Subject: Re: [PATCH 1/5] iio: inv_mpu6050: Cleanup hw_info mapping

On 24/04/16 12:10, Jonathan Cameron wrote:
> On 20/04/16 14:15, Crestez Dan Leonard wrote:
>> The hw_info array was indexed by enum inv_devices chip_type despite the
>> fact that the enumeration had more members than the array and was
>> ordered differently.
>>
>> The patch cleans this up and adds explicit chip_types to i2c/spi/acpi
>> IDs. It also adds some stricter checks inside the driver core.
>>
>> This happened to work so far because the differences between the
>> supported models are very minor.
>>
>> Signed-off-by: Crestez Dan Leonard <leonard.crestez@...el.com>h
> Ideally I'd like an Ack / review from Ge on these.
> The same is true for the whole series.
Applied.
> 
> Looks good to me though!
> 
> Jonathan
>> ---
>>  drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 15 ++++++++++++++-
>>  drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c  |  2 +-
>>  drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c  | 18 ++++++++++++++----
>>  3 files changed, 29 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
>> index d192953..52e62b3 100644
>> --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
>> +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
>> @@ -88,16 +88,23 @@ static const struct inv_mpu6050_chip_config chip_config_6050 = {
>>  	.accl_fs = INV_MPU6050_FS_02G,
>>  };
>>  
>> +/* Indexed by enum inv_devices */
>>  static const struct inv_mpu6050_hw hw_info[] = {
>>  	{
>>  		.num_reg = 117,
>> +		.name = "MPU6050",
>> +		.reg = &reg_set_6050,
>> +		.config = &chip_config_6050,
>> +	},
>> +	{
>> +		.num_reg = 117,
>>  		.name = "MPU6500",
>>  		.reg = &reg_set_6500,
>>  		.config = &chip_config_6050,
>>  	},
>>  	{
>>  		.num_reg = 117,
>> -		.name = "MPU6050",
>> +		.name = "MPU6000",
>>  		.reg = &reg_set_6050,
>>  		.config = &chip_config_6050,
>>  	},
>> @@ -774,6 +781,12 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
>>  	if (!indio_dev)
>>  		return -ENOMEM;
>>  
>> +	BUILD_BUG_ON(ARRAY_SIZE(hw_info) != INV_NUM_PARTS);
>> +	if (chip_type < 0 || chip_type >= INV_NUM_PARTS) {
>> +		dev_err(dev, "Bad invensense chip_type=%d name=%s\n",
>> +				chip_type, name);
>> +		return -ENODEV;
>> +	}
>>  	st = iio_priv(indio_dev);
>>  	st->chip_type = chip_type;
>>  	st->powerup_count = 0;
>> diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
>> index 5ee4e0d..bb1a7b1 100644
>> --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
>> +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
>> @@ -208,7 +208,7 @@ static const struct i2c_device_id inv_mpu_id[] = {
>>  MODULE_DEVICE_TABLE(i2c, inv_mpu_id);
>>  
>>  static const struct acpi_device_id inv_acpi_match[] = {
>> -	{"INVN6500", 0},
>> +	{"INVN6500", INV_MPU6500},
>>  	{ },
>>  };
>>  
>> diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c
>> index 7bcb8d8..3972a46 100644
>> --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c
>> +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c
>> @@ -44,9 +44,19 @@ static int inv_mpu_i2c_disable(struct iio_dev *indio_dev)
>>  static int inv_mpu_probe(struct spi_device *spi)
>>  {
>>  	struct regmap *regmap;
>> -	const struct spi_device_id *id = spi_get_device_id(spi);
>> -	const char *name = id ? id->name : NULL;
>> -	const int chip_type = id ? id->driver_data : 0;
>> +	const struct spi_device_id *spi_id;
>> +	const struct acpi_device_id *acpi_id;
>> +	const char *name = NULL;
>> +	enum inv_devices chip_type;
>> +
>> +	if ((spi_id = spi_get_device_id(spi))) {
>> +		chip_type = (enum inv_devices)spi_id->driver_data;
>> +		name = spi_id->name;
>> +	} else if ((acpi_id = acpi_match_device(spi->dev.driver->acpi_match_table, &spi->dev))) {
>> +		chip_type = (enum inv_devices)acpi_id->driver_data;
>> +	} else {
>> +		return -ENODEV;
>> +	}
>>  
>>  	regmap = devm_regmap_init_spi(spi, &inv_mpu_regmap_config);
>>  	if (IS_ERR(regmap)) {
>> @@ -76,7 +86,7 @@ static const struct spi_device_id inv_mpu_id[] = {
>>  MODULE_DEVICE_TABLE(spi, inv_mpu_id);
>>  
>>  static const struct acpi_device_id inv_acpi_match[] = {
>> -	{"INVN6000", 0},
>> +	{"INVN6000", INV_MPU6000},
>>  	{ },
>>  };
>>  MODULE_DEVICE_TABLE(acpi, inv_acpi_match);
>>
> 
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