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From: Enric Balletbo i Serra <enric.balletbo@collabora.com>
To: Gwendal Grignou <gwendal@chromium.org>,
	jic23@kernel.org, bleung@chromium.org
Cc: lars@metafoo.de, linux-iio@vger.kernel.org
Subject: Re: [PATCH v2] iio: cros_ec: Use default frequencies when EC returns invalid information
Date: Tue, 30 Jun 2020 17:50:24 +0200
Message-ID: <c1a187a7-1610-65d6-3636-796cd15cba08@collabora.com> (raw)
In-Reply-To: <20200630153730.3302889-1-gwendal@chromium.org>

Hi Gwendal,

On 30/6/20 17:37, Gwendal Grignou wrote:
> Minimal and maximal frequencies supported by a sensor is queried.
> On some older machines, these frequencies are not returned properly and
> the EC returns 0 instead.
> When returned maximal frequency is 0, ignore the information and use
> default frequencies instead.
> 
> Signed-off-by: Gwendal Grignou <gwendal@chromium.org>

Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>

> ---
> Changes since v1:
> - improve visibility by using new 100 character line length limit.
> 
>  .../cros_ec_sensors/cros_ec_sensors_core.c       | 16 +++++++++++-----
>  1 file changed, 11 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> index 36e3f20891f05..b30fd6b56773f 100644
> --- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> +++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> @@ -289,7 +289,7 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
>  	struct cros_ec_sensorhub *sensor_hub = dev_get_drvdata(dev->parent);
>  	struct cros_ec_dev *ec = sensor_hub->ec;
>  	struct cros_ec_sensor_platform *sensor_platform = dev_get_platdata(dev);
> -	u32 ver_mask;
> +	u32 ver_mask, temp;
>  	int frequencies[ARRAY_SIZE(state->frequencies) / 2] = { 0 };
>  	int ret, i;
>  
> @@ -345,10 +345,16 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
>  						 &frequencies[2],
>  						 &state->fifo_max_event_count);
>  		} else {
> -			frequencies[1] = state->resp->info_3.min_frequency;
> -			frequencies[2] = state->resp->info_3.max_frequency;
> -			state->fifo_max_event_count =
> -			    state->resp->info_3.fifo_max_event_count;
> +			if (state->resp->info_3.max_frequency == 0) {
> +				get_default_min_max_freq(state->resp->info.type,
> +							 &frequencies[1],
> +							 &frequencies[2],
> +							 &temp);
> +			} else {
> +				frequencies[1] = state->resp->info_3.min_frequency;
> +				frequencies[2] = state->resp->info_3.max_frequency;
> +			}
> +			state->fifo_max_event_count = state->resp->info_3.fifo_max_event_count;
>  		}
>  		for (i = 0; i < ARRAY_SIZE(frequencies); i++) {
>  			state->frequencies[2 * i] = frequencies[i] / 1000;
> 

      reply index

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-30 15:37 Gwendal Grignou
2020-06-30 15:50 ` Enric Balletbo i Serra [this message]

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