Intel Integrated Sensor Hub (ISH) is also a MCU running EC having feature bit EC_FEATURE_ISH. Instantiate it as a special CrOS EC device with device name 'cros_ish'.
Signed-off-by: Rushikesh S Kadam <rushikesh.s.ka...@intel.com> --- drivers/mfd/cros_ec_dev.c | 10 ++++++++++ include/linux/mfd/cros_ec.h | 1 + include/linux/mfd/cros_ec_commands.h | 2 ++ 3 files changed, 13 insertions(+) diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c index 2d0fee4..be499b8 100644 --- a/drivers/mfd/cros_ec_dev.c +++ b/drivers/mfd/cros_ec_dev.c @@ -414,6 +414,16 @@ static int ec_device_probe(struct platform_device *pdev) device_initialize(&ec->class_dev); cdev_init(&ec->cdev, &fops); + /* check whether this is actually a Intel ISH rather than an EC */ + if (cros_ec_check_features(ec, EC_FEATURE_ISH)) { + dev_info(dev, "Intel ISH MCU detected.\n"); + /* + * Help userspace differentiating ECs from ISH MCU, + * regardless of the probing order. + */ + ec_platform->ec_name = CROS_EC_DEV_ISH_NAME; + } + /* * Add the class device * Link to the character device for creating the /dev entry diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h index de8b588..00c5765 100644 --- a/include/linux/mfd/cros_ec.h +++ b/include/linux/mfd/cros_ec.h @@ -24,6 +24,7 @@ #define CROS_EC_DEV_NAME "cros_ec" #define CROS_EC_DEV_PD_NAME "cros_pd" +#define CROS_EC_DEV_ISH_NAME "cros_ish" /* * The EC is unresponsive for a time after a reboot command. Add a diff --git a/include/linux/mfd/cros_ec_commands.h b/include/linux/mfd/cros_ec_commands.h index fc91082..9276c3c 100644 --- a/include/linux/mfd/cros_ec_commands.h +++ b/include/linux/mfd/cros_ec_commands.h @@ -856,6 +856,8 @@ enum ec_feature_code { EC_FEATURE_RTC = 27, /* EC supports CEC commands */ EC_FEATURE_CEC = 35, + /* The MCU is an Intel Integrated Sensor Hub */ + EC_FEATURE_ISH = 40, }; #define EC_FEATURE_MASK_0(event_code) (1UL << (event_code % 32)) -- 1.9.1