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 <[email protected]>
---
v2
- Addressed review comments to term the CrOS EC device as a generic
Integrated Sensor Hub.
v1
- Initial version.
drivers/mfd/cros_ec_dev.c | 13 +++++++++++++
include/linux/mfd/cros_ec.h | 1 +
include/linux/mfd/cros_ec_commands.h | 2 ++
3 files changed, 16 insertions(+)
diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
index 2d0fee4..46963c2 100644
--- a/drivers/mfd/cros_ec_dev.c
+++ b/drivers/mfd/cros_ec_dev.c
@@ -415,6 +415,19 @@ static int ec_device_probe(struct platform_device *pdev)
cdev_init(&ec->cdev, &fops);
/*
+ * Check whether this is actually an Integrated Sensor Hub (ISH)
+ * rather than an EC.
+ */
+ if (cros_ec_check_features(ec, EC_FEATURE_ISH)) {
+ dev_info(dev, "CrOS 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
* in devtmpfs.
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
On Fri, Mar 01, 2019 at 09:36:11AM +0530, Rushikesh S Kadam wrote:
> 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'.
> v2
> - Addressed review comments to term the CrOS EC device as a generic
> Integrated Sensor Hub.
> + /* The MCU is an Intel Integrated Sensor Hub */
This has to be adjusted as well. Intel ISH is just one of the example of ISHs.
> + EC_FEATURE_ISH = 40,
--
With Best Regards,
Andy Shevchenko
Hi Andy
On Fri, Mar 01, 2019 at 09:28:11AM +0200, Andy Shevchenko wrote:
> On Fri, Mar 01, 2019 at 09:36:11AM +0530, Rushikesh S Kadam wrote:
> > 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'.
>
> > v2
> > - Addressed review comments to term the CrOS EC device as a generic
> > Integrated Sensor Hub.
>
> > + /* The MCU is an Intel Integrated Sensor Hub */
>
> This has to be adjusted as well. Intel ISH is just one of the example of ISHs.
Thanks for the catch
I submitted v3 with this fixed
Regards
Rushikesh
>
> > + EC_FEATURE_ISH = 40,
>
> --
> With Best Regards,
> Andy Shevchenko
>
>
--