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mfd / platform: cros_ec: Add sensor_count and make check_features public

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Add a new function to return the number of MEMS sensors available in a
ChromeOS Embedded Controller. It uses MOTIONSENSE_CMD_DUMP if available
or a specific memory map ACPI registers to find out.

Also, make check_features public as it can be useful for other drivers
to know what the Embedded Controller supports.

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
This commit is contained in:
Gwendal Grignou 2019-11-19 13:45:45 +01:00 • committed by Enric Balletbo i Serra
parent c9b465683a
commit a16b2e2819
3 changed files with 122 additions and 32 deletions
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5
include/linux/platform_data/cros_ec_proto.h
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@ -12,6 +12,7 @@
#include <linux/mutex.h>
#include <linux/notifier.h>
#include <linux/mfd/cros_ec.h>
#include <linux/platform_data/cros_ec_commands.h>
#define CROS_EC_DEV_NAME "cros_ec"
@ -213,4 +214,8 @@ int cros_ec_get_next_event(struct cros_ec_device *ec_dev, bool *wake_event);
u32 cros_ec_get_host_event(struct cros_ec_device *ec_dev);
int cros_ec_check_features(struct cros_ec_dev *ec, int feature);
int cros_ec_get_sensor_count(struct cros_ec_dev *ec);
#endif /* __LINUX_CROS_EC_PROTO_H */