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patch "iio: cros_ec: Use default frequencies when EC returns invalid" added to staging-linus

PATCH [email protected] 1 participant 1 message Nov 17, 2020

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This is a note to let you know that I've just added the patch titled

iio: cros_ec: Use default frequencies when EC returns invalid

to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 56e4f2dda23c6d39d327944faa89efaa4eb290d1 Mon Sep 17 00:00:00 2001
From: Gwendal Grignou <[email protected]>
Date: Tue, 30 Jun 2020 08:37:30 -0700
Subject: iio: cros_ec: Use default frequencies when EC returns invalid
information

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.

Fixes ae7b02ad2f32 ("iio: common: cros_ec_sensors: Expose cros_ec_sensors frequency range via iio sysfs")
Signed-off-by Gwendal Grignou <[email protected]>
Reviewed-by Enric Balletbo i Serra <[email protected]>
Link https://lore.kernel.org/r/[email protected] open here
CC <[email protected]>
Signed-off-by Jonathan Cameron <[email protected]>
---
 .../cros_ec_sensors/cros_ec_sensors_core.c       | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)
drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c +11 -5
index c62cacc04672..e3f507771f17 100644
@@ -256,7 +256,7 @@ 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;
 

@@ -311,10 +311,16 @@ 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;
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