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From: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
To: Lee Jones <lee.jones@linaro.org>
Cc: Olof Johansson <olof@lixom.net>, Arnd Bergmann <arnd@arndb.de>,
	Doug Anderson <dianders@chromium.org>,
	Bill Richardson <wfrichar@chromium.org>,
	Simon Glass <sjg@google.com>,
	Gwendal Grignou <gwendal@google.com>,
	Jonathan Corbet <corbet@lwn.net>,
	Varka Bhadram <varkabhadram@gmail.com>,
	linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org,
	Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Subject: [PATCH v4 2/7] mfd: cros_ec: Add char dev and virtual dev pointers
Date: Thu, 29 Jan 2015 14:37:51 +0100	[thread overview]
Message-ID: <1422538676-4615-3-git-send-email-javier.martinez@collabora.co.uk> (raw)
In-Reply-To: <1422538676-4615-1-git-send-email-javier.martinez@collabora.co.uk>

The ChromeOS Embedded Controller has to be accessed by applications.
A virtual character device is used as an interface with user-space.

Extend the struct cros_ec_device with the fields needed by the driver
of this virtual character device.

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Acked-by: Lee Jones <lee.jones@linaro.org>
---

Changes since v3: None.

Changes since v2: None, added Lee Jones Acked-by tag.

Changes since v1: None, new patch.
---
 include/linux/mfd/cros_ec.h | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h
index 71675b14b5ca..324a34683971 100644
--- a/include/linux/mfd/cros_ec.h
+++ b/include/linux/mfd/cros_ec.h
@@ -16,6 +16,7 @@
 #ifndef __LINUX_MFD_CROS_EC_H
 #define __LINUX_MFD_CROS_EC_H
 
+#include <linux/cdev.h>
 #include <linux/notifier.h>
 #include <linux/mfd/cros_ec_commands.h>
 #include <linux/mutex.h>
@@ -59,9 +60,17 @@ struct cros_ec_command {
  *
  * @ec_name: name of EC device (e.g. 'chromeos-ec')
  * @phys_name: name of physical comms layer (e.g. 'i2c-4')
- * @dev: Device pointer
+ * @dev: Device pointer for physical comms device
+ * @vdev: Device pointer for virtual comms device
+ * @cdev: Character device structure for virtual comms device
  * @was_wake_device: true if this device was set to wake the system from
  * sleep at the last suspend
+ * @cmd_readmem: direct read of the EC memory-mapped region, if supported
+ *     @offset is within EC_LPC_ADDR_MEMMAP region.
+ *     @bytes: number of bytes to read. zero means "read a string" (including
+ *     the trailing '\0'). At most only EC_MEMMAP_SIZE bytes can be read.
+ *     Caller must ensure that the buffer is large enough for the result when
+ *     reading a string.
  *
  * @priv: Private data
  * @irq: Interrupt to use
@@ -90,8 +99,12 @@ struct cros_ec_device {
 	const char *ec_name;
 	const char *phys_name;
 	struct device *dev;
+	struct device *vdev;
+	struct cdev cdev;
 	bool was_wake_device;
 	struct class *cros_class;
+	int (*cmd_readmem)(struct cros_ec_device *ec, unsigned int offset,
+			   unsigned int bytes, void *dest);
 
 	/* These are used to implement the platform-specific interface */
 	void *priv;
-- 
2.1.3


  parent reply	other threads:[~2015-01-29 13:38 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-29 13:37 [PATCH v4 0/7] platform/chrome: Add user-space dev inferface support Javier Martinez Canillas
2015-01-29 13:37 ` [PATCH v4 1/7] mfd: cros_ec: Use fixed size arrays to transfer data with the EC Javier Martinez Canillas
2015-01-29 13:37 ` Javier Martinez Canillas [this message]
2015-01-29 13:37 ` [PATCH v4 3/7] misc: Add cros_ec_lpc driver for x86 devices Javier Martinez Canillas
2015-01-29 14:15   ` Varka Bhadram
2015-01-29 21:11   ` Paul Bolle
2015-01-30 12:51     ` Javier Martinez Canillas
2015-02-02 11:57       ` Javier Martinez Canillas
2015-01-29 13:37 ` [PATCH v4 4/7] platform/chrome: Add Chrome OS EC userspace device interface Javier Martinez Canillas
2015-01-29 13:37 ` [PATCH v4 5/7] mfd: cros_ec: Instantiate ChromeOS EC character device Javier Martinez Canillas
2015-01-29 13:37 ` [PATCH v4 6/7] platform/chrome: Create sysfs attributes for the ChromeOS EC Javier Martinez Canillas
2015-01-29 13:37 ` [PATCH v4 7/7] platform/chrome: Expose Chrome OS Lightbar to users Javier Martinez Canillas

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