On Sun, Apr 14, 2019 at 09:59:19PM +0000, Adamski, Krzysztof (Nokia -
PL/Wroclaw) wrote:
> Manufacturer specific SAMPLES_FOR_AVG register allows setting the number
> of samples used in computing the average values (PMBUS_VIRT_READ_*_AVG).
> The number we write is an exponent of base 2 of the number of samples so
> for example writing 3 will result in 8 samples average.
>
> Signed-off-by: Krzysztof Adamski <[email protected]>
Applied to hwmon-next.
Thanks,
Guenter
> ---
> drivers/hwmon/pmbus/lm25066.c | 17 ++++++++++++++++-
> 1 file changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/hwmon/pmbus/lm25066.c b/drivers/hwmon/pmbus/lm25066.c
> index 53db78753a0d..715d4ab57516 100644
> --- a/drivers/hwmon/pmbus/lm25066.c
> +++ b/drivers/hwmon/pmbus/lm25066.c
> @@ -26,6 +26,7 @@
> #include <linux/err.h>
> #include <linux/slab.h>
> #include <linux/i2c.h>
> +#include <linux/log2.h>
> #include "pmbus.h"
>
> enum chips { lm25056, lm25066, lm5064, lm5066, lm5066i };
> @@ -39,12 +40,15 @@ enum chips { lm25056, lm25066, lm5064, lm5066, lm5066i };
> #define LM25066_CLEAR_PIN_PEAK 0xd6
> #define LM25066_DEVICE_SETUP 0xd9
> #define LM25066_READ_AVG_VIN 0xdc
> +#define LM25066_SAMPLES_FOR_AVG 0xdb
> #define LM25066_READ_AVG_VOUT 0xdd
> #define LM25066_READ_AVG_IIN 0xde
> #define LM25066_READ_AVG_PIN 0xdf
>
> #define LM25066_DEV_SETUP_CL BIT(4) /* Current limit */
>
> +#define LM25066_SAMPLES_FOR_AVG_MAX 4096
> +
> /* LM25056 only */
>
> #define LM25056_VAUX_OV_WARN_LIMIT 0xe3
> @@ -284,6 +288,12 @@ static int lm25066_read_word_data(struct i2c_client
> *client, int page, int reg)
> case PMBUS_VIRT_RESET_PIN_HISTORY:
> ret = 0;
> break;
> + case PMBUS_VIRT_SAMPLES:
> + ret = pmbus_read_byte_data(client, 0, LM25066_SAMPLES_FOR_AVG);
> + if (ret < 0)
> + break;
> + ret = 1 << ret;
> + break;
> default:
> ret = -ENODATA;
> break;
> @@ -398,6 +408,11 @@ static int lm25066_write_word_data(struct i2c_client
> *client, int page, int reg,
> case PMBUS_VIRT_RESET_PIN_HISTORY:
> ret = pmbus_write_byte(client, 0, LM25066_CLEAR_PIN_PEAK);
> break;
> + case PMBUS_VIRT_SAMPLES:
> + word = clamp_val(word, 1, LM25066_SAMPLES_FOR_AVG_MAX);
> + ret = pmbus_write_byte_data(client, 0, LM25066_SAMPLES_FOR_AVG,
> + ilog2(word));
> + break;
> default:
> ret = -ENODATA;
> break;
> @@ -438,7 +453,7 @@ static int lm25066_probe(struct i2c_client *client,
>
> info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VMON
> | PMBUS_HAVE_PIN | PMBUS_HAVE_IIN | PMBUS_HAVE_STATUS_INPUT
> - | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
> + | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_SAMPLES;
>
> if (data->id == lm25056) {
> info->func[0] |= PMBUS_HAVE_STATUS_VMON;
