From: Rushikesh S Kadam <rushikesh.s.kadam@intel.com>
To: lee.jones@linaro.org, bleung@chromium.org,
enric.balletbo@collabora.com, groeck@chromium.org
Cc: linux-kernel@vger.kernel.org, rushikesh.s.kadam@intel.com,
gwendal@google.com, jettrink@chromium.org,
andriy.shevchenko@intel.com
Subject: [PATCH] cros_ec: instantiate properly Intel ISH MCU device
Date: Sun, 24 Feb 2019 14:43:49 +0530 [thread overview]
Message-ID: <1550999629-31791-1-git-send-email-rushikesh.s.kadam@intel.com> (raw)
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.kadam@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
next reply other threads:[~2019-02-24 9:14 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-24 9:13 Rushikesh S Kadam [this message]
[not found] ` <CABXOdTdprS1OL534XQq8yHTFDzXdWWODq3VGrSEHYe2wmV5zfg@mail.gmail.com>
[not found] ` <CAK+PMK67rWZarOV31n=yYbRMq3wo9vDyMTQ93PFZ7PRUMS66Ng@mail.gmail.com>
[not found] ` <CABXOdTdbev2nKNjocqxOyPcGOU8zbWpQ7uALWZdEHL0CXkYDgA@mail.gmail.com>
[not found] ` <CAK+PMK5U4YRtJNUbsQu3ARJFxwai7W=DjPfjuX_AZMFcUZ-c_A@mail.gmail.com>
2019-02-27 14:22 ` [PATCH] cros_ec: instantiate properly Intel ISH MCU device Enric Balletbo i Serra
2019-02-27 15:13 ` Jett Rink
2019-02-27 18:08 ` Enric Balletbo i Serra
2019-02-27 18:34 ` Gwendal Grignou
2019-02-27 23:05 ` Enric Balletbo Serra
2019-02-28 7:56 ` Andy Shevchenko
2019-02-28 12:17 ` Enric Balletbo Serra
2019-02-28 23:39 ` Gwendal Grignou
2019-02-28 12:33 ` Enric Balletbo Serra
2019-03-01 3:19 ` Rushikesh S Kadam
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