linux-kernel - Re: [PATCH 1/3] iio: imu: mpu6050: add support for 6515 variant

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Message-ID: <20180712154738.00002918@huawei.com>
Date:   Thu, 12 Jul 2018 15:47:38 +0100
From:   Jonathan Cameron <jonathan.cameron@...wei.com>
To:     Brian Masney <masneyb@...tation.org>
CC:     <jic23@...nel.org>, <robh+dt@...nel.org>, <mark.rutland@....com>,
        <andy.gross@...aro.org>, <david.brown@...aro.org>,
        <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-soc@...r.kernel.org>, <jonathan@...ek.ca>,
        <jmaneyrol@...ensense.com>, <knaack.h@....de>, <lars@...afoo.de>,
        <pmeerw@...erw.net>, <mkelly@...o.com>,
        <fischerdouglasc@...il.com>, <bshah@....org>, <ctatlor97@...il.com>
Subject: Re: [PATCH 1/3] iio: imu: mpu6050: add support for 6515 variant

On Tue, 10 Jul 2018 21:09:30 -0400
Brian Masney <masneyb@...tation.org> wrote:

> This patch adds support for the MPU 6515 variant. Confirmed that the
> driver functions correctly on a LG Nexus 5 (hammerhead) phone.
> 
> Signed-off-by: Brian Masney <masneyb@...tation.org>
> Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
> ---
> This is a variation of Jonathan Marek's patch from postmarketOS
> https://gitlab.com/postmarketOS/linux-postmarketos/commit/b8ad1ec1859c8bbcbce94944b3f4dd68f8f9fc37
> with the following changes:
> 
> - The driver was previously throwing a 'whoami mismatch got XXX' error.
>   Corrected ordering of hw_info variable to match the index of the
>   inv_devices enum. The mpu6515 needed to come after mpu6500, not
>   mpu6050.
> - Removed regulator code. See next patch in this series.
> 
> I got confirmation from Jonathan M. that it was ok for me to submit his
> patch upstream with these changes.
> 
> Jonathan C.: I assume that it is ok for the device tree binding
> documentation to go through IIO? If not, I can split this out into a
> separate patch if needed.
A single ID addition is normally uncontroversial enough that we don't bother
the DT maintainers (though of course they are welcome to look!).
So this is fine.
> 
>  Documentation/devicetree/bindings/iio/imu/inv_mpu6050.txt | 1 +
>  drivers/iio/imu/inv_mpu6050/inv_mpu_core.c                | 6 ++++++
>  drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c                 | 5 +++++
>  drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h                 | 2 ++
>  4 files changed, 14 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/iio/imu/inv_mpu6050.txt b/Documentation/devicetree/bindings/iio/imu/inv_mpu6050.txt
> index 5f4777e8cc9e..b7def51c8ad9 100644
> --- a/Documentation/devicetree/bindings/iio/imu/inv_mpu6050.txt
> +++ b/Documentation/devicetree/bindings/iio/imu/inv_mpu6050.txt
> @@ -6,6 +6,7 @@ Required properties:
>   - compatible : should be one of
>  		"invensense,mpu6050"
>   		"invensense,mpu6500"
> +		"invensense,mpu6515"
>  		"invensense,mpu9150"
>  		"invensense,mpu9250"
>  		"invensense,mpu9255"
> diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
> index de68e83fc52d..12c1b9507007 100644
> --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
> +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
> @@ -103,6 +103,12 @@ static const struct inv_mpu6050_hw hw_info[] = {
>  		.reg = &reg_set_6500,
>  		.config = &chip_config_6050,
>  	},
> +	{
> +		.whoami = INV_MPU6515_WHOAMI_VALUE,
> +		.name = "MPU6515",
> +		.reg = &reg_set_6500,
> +		.config = &chip_config_6050,
> +	},
>  	{
>  		.whoami = INV_MPU6000_WHOAMI_VALUE,
>  		.name = "MPU6000",
> diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
> index 495409d56207..dd758e3d403d 100644
> --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
> +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
> @@ -174,6 +174,7 @@ static int inv_mpu_remove(struct i2c_client *client)
>  static const struct i2c_device_id inv_mpu_id[] = {
>  	{"mpu6050", INV_MPU6050},
>  	{"mpu6500", INV_MPU6500},
> +	{"mpu6515", INV_MPU6515},
>  	{"mpu9150", INV_MPU9150},
>  	{"mpu9250", INV_MPU9250},
>  	{"mpu9255", INV_MPU9255},
> @@ -192,6 +193,10 @@ static const struct of_device_id inv_of_match[] = {
>  		.compatible = "invensense,mpu6500",
>  		.data = (void *)INV_MPU6500
>  	},
> +	{
> +		.compatible = "invensense,mpu6515",
> +		.data = (void *)INV_MPU6515
> +	},
>  	{
>  		.compatible = "invensense,mpu9150",
>  		.data = (void *)INV_MPU9150
> diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
> index de8391693e17..e69a59659dbc 100644
> --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
> +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
> @@ -71,6 +71,7 @@ struct inv_mpu6050_reg_map {
>  enum inv_devices {
>  	INV_MPU6050,
>  	INV_MPU6500,
> +	INV_MPU6515,
>  	INV_MPU6000,
>  	INV_MPU9150,
>  	INV_MPU9250,
> @@ -256,6 +257,7 @@ struct inv_mpu6050_state {
>  #define INV_MPU9150_WHOAMI_VALUE		0x68
>  #define INV_MPU9250_WHOAMI_VALUE		0x71
>  #define INV_MPU9255_WHOAMI_VALUE		0x73
> +#define INV_MPU6515_WHOAMI_VALUE		0x74
>  #define INV_ICM20608_WHOAMI_VALUE		0xAF
>  
>  /* scan element definition */