Re: [PATCH v3 4/5] iio: light: vcnl4000 add support for the VCNL4040 proximity and light sensor

Jonathan Cameron
2019-03-24T17:25:07Z

On Thu, 21 Mar 2019 08:40:46 -0700
"Angus Ainslie (Purism)" <angus@akkea.ca> wrote:

> The VCNL4040 is almost identical to the VCNL4200 as far as register
> layout goes but just need to check a different ID register location.
>
> Signed-off-by: Angus Ainslie (Purism) <angus@akkea.ca>
Applied to the togreg branch of iio.git and pushed out as testing for
the autobuilders to play with it.

Thanks,

Jonathan

> ---
> drivers/iio/light/vcnl4000.c | 51 ++++++++++++++++++++++++++++++------
> 1 file changed, 43 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c
> index 308cb2d2b641..12c52f2b853a 100644
> --- a/drivers/iio/light/vcnl4000.c
> +++ b/drivers/iio/light/vcnl4000.c
> @@ -1,8 +1,9 @@
> /*
> - * vcnl4000.c - Support for Vishay VCNL4000/4010/4020/4200 combined ambient
> + * vcnl4000.c - Support for Vishay VCNL4000/4010/4020/4040/4200 combined ambient
> * light and proximity sensor
> *
> * Copyright 2012 Peter Meerwald <pmeerw@pmeerw.net>
> + * Copyright 2019 Pursim SPC
> *
> * This file is subject to the terms and conditions of version 2 of
> * the GNU General Public License. See the file COPYING in the main
> @@ -10,13 +11,14 @@
> *
> * IIO driver for:
> * VCNL4000/10/20 (7-bit I2C slave address 0x13)
> + * VCNL4040 (7-bit I2C slave address 0x60)
> * VCNL4200 (7-bit I2C slave address 0x51)
> *
> * TODO:
> * allow to adjust IR current
> * proximity threshold and event handling
> * periodic ALS/proximity measurement (VCNL4010/20)
> - * interrupts (VCNL4010/20, VCNL4200)
> + * interrupts (VCNL4010/20/40, VCNL4200)
> */
>
> #include <linux/module.h>
> @@ -30,6 +32,7 @@
> #define VCNL4000_DRV_NAME "vcnl4000"
> #define VCNL4000_PROD_ID 0x01
> #define VCNL4010_PROD_ID 0x02 /* for VCNL4020, VCNL4010 */
> +#define VCNL4040_PROD_ID 0x86
> #define VCNL4200_PROD_ID 0x58
>
> #define VCNL4000_COMMAND 0x80 /* Command register */
> @@ -49,6 +52,8 @@
> #define VCNL4200_AL_DATA 0x09 /* Ambient light data */
> #define VCNL4200_DEV_ID 0x0e /* Device ID, slave address and version */
>
> +#define VCNL4040_DEV_ID 0x0c /* Device ID and version */
> +
> /* Bit masks for COMMAND register */
> #define VCNL4000_AL_RDY BIT(6) /* ALS data ready? */
> #define VCNL4000_PS_RDY BIT(5) /* proximity data ready? */
> @@ -58,6 +63,7 @@
> enum vcnl4000_device_ids {
> VCNL4000,
> VCNL4010,
> + VCNL4040,
> VCNL4200,
> };
>
> @@ -90,6 +96,7 @@ static const struct i2c_device_id vcnl4000_id[] = {
> { "vcnl4000", VCNL4000 },
> { "vcnl4010", VCNL4010 },
> { "vcnl4020", VCNL4010 },
> + { "vcnl4040", VCNL4040 },
> { "vcnl4200", VCNL4200 },
> { }
> };
> @@ -128,14 +135,26 @@ static int vcnl4000_init(struct vcnl4000_data *data)
>
> static int vcnl4200_init(struct vcnl4000_data *data)
> {
> - int ret;
> + int ret, id;
>
> ret = i2c_smbus_read_word_data(data->client, VCNL4200_DEV_ID);
> if (ret < 0)
> return ret;
>
> - if ((ret & 0xff) != VCNL4200_PROD_ID)
> - return -ENODEV;
> + id = ret & 0xff;
> +
> + if (id != VCNL4200_PROD_ID) {
> + ret = i2c_smbus_read_word_data(data->client, VCNL4040_DEV_ID);
> + if (ret < 0)
> + return ret;
> +
> + id = ret & 0xff;
> +
> + if (id != VCNL4040_PROD_ID)
> + return -ENODEV;
> + }
> +
> + dev_dbg(&data->client->dev, "device id 0x%x", id);
>
> data->rev = (ret >> 8) & 0xf;
>
> @@ -150,9 +169,19 @@ static int vcnl4200_init(struct vcnl4000_data *data)
> data->al_scale = 24000;
> data->vcnl4200_al.reg = VCNL4200_AL_DATA;
> data->vcnl4200_ps.reg = VCNL4200_PS_DATA;
> - /* Integration time is 50ms, but the experiments show 54ms in total. */
> - data->vcnl4200_al.sampling_rate = ktime_set(0, 54000 * 1000);
> - data->vcnl4200_ps.sampling_rate = ktime_set(0, 4200 * 1000);
> + switch (id) {
> + case VCNL4200_PROD_ID:
> + /* Integration time is 50ms, but the experiments */
> + /* show 54ms in total. */
> + data->vcnl4200_al.sampling_rate = ktime_set(0, 54000 * 1000);
> + data->vcnl4200_ps.sampling_rate = ktime_set(0, 4200 * 1000);
> + break;
> + case VCNL4040_PROD_ID:
> + /* Integration time is 80ms, add 10ms. */
> + data->vcnl4200_al.sampling_rate = ktime_set(0, 100000 * 1000);
> + data->vcnl4200_ps.sampling_rate = ktime_set(0, 100000 * 1000);
> + break;
> + }
> data->vcnl4200_al.last_measurement = ktime_set(0, 0);
> data->vcnl4200_ps.last_measurement = ktime_set(0, 0);
> mutex_init(&data->vcnl4200_al.lock);
> @@ -271,6 +300,12 @@ static const struct vcnl4000_chip_spec vcnl4000_chip_spec_cfg[] = {
> .measure_light = vcnl4000_measure_light,
> .measure_proximity = vcnl4000_measure_proximity,
> },
> + [VCNL4040] = {
> + .prod = "VCNL4040",
> + .init = vcnl4200_init,
> + .measure_light = vcnl4200_measure_light,
> + .measure_proximity = vcnl4200_measure_proximity,
> + },
> [VCNL4200] = {
> .prod = "VCNL4200",
> .init = vcnl4200_init,