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Subject[PATCH v7 1/2] mfd: cros_ec: Register cros_ec_lid_angle driver when presented
Date
Register driver when EC indicates has precise lid angle calculation code
running.
Fix incorrect extra resource allocation in cros_ec_sensors_register().

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
---
Changes in v7:
- Split patch in two: This is the MFD section.

drivers/mfd/cros_ec_dev.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
index 54a58df571b6..d992365472b8 100644
--- a/drivers/mfd/cros_ec_dev.c
+++ b/drivers/mfd/cros_ec_dev.c
@@ -297,13 +297,15 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)

resp = (struct ec_response_motion_sense *)msg->data;
sensor_num = resp->dump.sensor_count;
- /* Allocate 1 extra sensors in FIFO are needed */
- sensor_cells = kcalloc(sensor_num + 1, sizeof(struct mfd_cell),
+ /*
+ * Allocate 2 extra sensors if lid angle sensor and/or FIFO are needed.
+ */
+ sensor_cells = kcalloc(sensor_num + 2, sizeof(struct mfd_cell),
GFP_KERNEL);
if (sensor_cells == NULL)
goto error;

- sensor_platforms = kcalloc(sensor_num + 1,
+ sensor_platforms = kcalloc(sensor_num,
sizeof(struct cros_ec_sensor_platform),
GFP_KERNEL);
if (sensor_platforms == NULL)
@@ -363,6 +365,11 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)
sensor_cells[id].name = "cros-ec-ring";
id++;
}
+ if (cros_ec_check_features(ec,
+ EC_FEATURE_REFINED_TABLET_MODE_HYSTERESIS)) {
+ sensor_cells[id].name = "cros-ec-lid-angle";
+ id++;
+ }

ret = mfd_add_devices(ec->dev, 0, sensor_cells, id,
NULL, 0, NULL);
--
2.21.0.1020.gf2820cf01a-goog
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