linux-kernel - Re: [PATCH V7 4/5] iio: accel: sca3300: Add support for SCL3300

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Date:   Sun, 22 May 2022 12:12:22 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     LI Qingwu <Qing-wu.Li@...ca-geosystems.com.cn>
Cc:     lars@...afoo.de, robh+dt@...nel.org, tomas.melin@...sala.com,
        andy.shevchenko@...il.com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org
Subject: Re: [PATCH V7 4/5] iio: accel: sca3300: Add support for SCL3300

On Sun, 22 May 2022 07:04:18 +0000
LI Qingwu <Qing-wu.Li@...ca-geosystems.com.cn> wrote:

> Add support for Murata SCL3300, a 3-axis MEMS accelerometer.
> Same as SCA3300, it has the accelerometer and temperature output.
> 
> Datasheet: www.murata.com/en-us/products/sensor/inclinometer/overview/lineup/scl3300
> Signed-off-by: LI Qingwu <Qing-wu.Li@...ca-geosystems.com.cn>

Hi,

Given you'll be respinning to address Christophe's comment, one trivial
thing inline (if this had been all that came up I'd have just tweaked
it whilst applying).

First 4 patches look good to me otherwise. I'll take a look at 5 shortly.

Thanks,

Jonathan


> ---
>  drivers/iio/accel/sca3300.c | 28 ++++++++++++++++++++++++++--
>  1 file changed, 26 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/iio/accel/sca3300.c b/drivers/iio/accel/sca3300.c
> index e57aba79c32b..10bedb14d4f0 100644
> --- a/drivers/iio/accel/sca3300.c
> +++ b/drivers/iio/accel/sca3300.c
> @@ -38,6 +38,7 @@
>  /* Device ID */
>  #define SCA3300_REG_WHOAMI	0x10
>  #define SCA3300_WHOAMI_ID	0x51
> +#define SCL3300_WHOAMI_ID	0xC1
>  
>  /* Device return status and mask */
>  #define SCA3300_VALUE_RS_ERROR	0x3
> @@ -96,10 +97,18 @@ static const struct iio_chan_spec sca3300_channels[] = {
>  static const int sca3300_lp_freq[] = {70, 10};
>  static const int sca3300_lp_freq_map[] = {0, 0, 0, 1};
>  
> +static const int scl3300_lp_freq[] = {40, 70, 10};
> +static const int scl3300_lp_freq_map[] = {0, 1, 2};
> +
>  static const int sca3300_accel_scale[][2] = {{0, 370}, {0, 741}, {0, 185}};
>  static const int sca3300_accel_scale_map[] = {0, 1, 2, 2};
>  
> +static const int scl3300_accel_scale[][2] = {{0, 167}, {0, 333}, {0, 83}};
> +static const int scl3300_accel_scale_map[] = {0, 1, 2};
> +
>  static const int sca3300_avail_modes_map[] = {0, 1, 2, 3};
> +static const int scl3300_avail_modes_map[] = {0, 1, 3};
> +
>  static const unsigned long sca3300_scan_masks[] = {
>  	BIT(SCA3300_ACC_X) | BIT(SCA3300_ACC_Y) | BIT(SCA3300_ACC_Z) |
>  	BIT(SCA3300_TEMP),
> @@ -159,6 +168,20 @@ static const struct sca3300_chip_info sca3300_chip_tbl[] = {
>  		.num_avail_modes = 4,
>  		.chip_id = SCA3300_WHOAMI_ID,
>  	},
> +	{	.scan_masks = sca3300_scan_masks,

	{
		.scan_masks = ...

> +		.channels = sca3300_channels,
> +		.num_channels = ARRAY_SIZE(sca3300_channels),
> +		.num_accel_scales = ARRAY_SIZE(scl3300_accel_scale)*2,
> +		.accel_scale = scl3300_accel_scale,
> +		.accel_scale_map = scl3300_accel_scale_map,
> +		.num_freqs = ARRAY_SIZE(scl3300_lp_freq),
> +		.freq_table = scl3300_lp_freq,
> +		.freq_map = scl3300_lp_freq_map,
> +		.name = "scl3300",
> +		.avail_modes_table = scl3300_avail_modes_map,
> +		.num_avail_modes = 3,
> +		.chip_id = SCL3300_WHOAMI_ID,
> +	},
>  };
>  
>  DECLARE_CRC8_TABLE(sca3300_crc_table);
> @@ -444,9 +467,9 @@ static int sca3300_init(struct sca3300_data *sca_data,
>  
>  	/*
>  	 * Wait 1ms after SW-reset command.
> -	 * Wait 15ms for settling of signal paths.
> +	 * Wait 25ms for settling of signal paths.
>  	 */
> -	usleep_range(16e3, 50e3);
> +	usleep_range(26e3, 50e3);
>  
>  	ret = sca3300_read_reg(sca_data, SCA3300_REG_WHOAMI, &value);
>  	if (ret)
> @@ -573,6 +596,7 @@ static int sca3300_probe(struct spi_device *spi)
>  
>  static const struct of_device_id sca3300_dt_ids[] = {
>  	{ .compatible = "murata,sca3300"},
> +	{ .compatible = "murata,scl3300"},
>  	{}
>  };
>  MODULE_DEVICE_TABLE(of, sca3300_dt_ids);