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Date: Tue, 2 Nov 2021 16:41:13 -0700
From: Stephen Boyd <swboyd@...omium.org>
To: Benson Leung <bleung@...omium.org>,
Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc: linux-kernel@...r.kernel.org, Guenter Roeck <groeck@...omium.org>
Subject: [PATCH] platform/chrome: cros_ec_chardev: Export chardev ioctls to UAPI
These ioctls and structures are part of the UAPI, export them as such by
moving the header to include/uapi/. We leave the version define out of
the header as it isn't part of the UAPI. Similarly, EC_MEMMAP_SIZE is
from the copy/pasted cros ec header so we just hardcode the array size
instead of exporting that define.
Cc: Guenter Roeck <groeck@...omium.org>
Signed-off-by: Stephen Boyd <swboyd@...omium.org>
---
drivers/mfd/cros_ec_dev.c | 1 -
drivers/platform/chrome/cros_ec_chardev.c | 5 ++-
include/linux/platform_data/cros_ec_proto.h | 19 +-----------
.../linux}/cros_ec_chardev.h | 31 +++++++++++++------
4 files changed, 27 insertions(+), 29 deletions(-)
rename include/{linux/platform_data => uapi/linux}/cros_ec_chardev.h (55%)
diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
index 8c08d1c55726..8c54381bbf45 100644
--- a/drivers/mfd/cros_ec_dev.c
+++ b/drivers/mfd/cros_ec_dev.c
@@ -12,7 +12,6 @@
#include <linux/mod_devicetable.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
-#include <linux/platform_data/cros_ec_chardev.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/slab.h>
diff --git a/drivers/platform/chrome/cros_ec_chardev.c b/drivers/platform/chrome/cros_ec_chardev.c
index e0bce869c49a..3116c5de9fa2 100644
--- a/drivers/platform/chrome/cros_ec_chardev.c
+++ b/drivers/platform/chrome/cros_ec_chardev.c
@@ -16,7 +16,6 @@
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/notifier.h>
-#include <linux/platform_data/cros_ec_chardev.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
@@ -25,6 +24,10 @@
#include <linux/types.h>
#include <linux/uaccess.h>
+#include <uapi/linux/cros_ec_chardev.h>
+
+#define CROS_EC_DEV_VERSION "1.0.0"
+
#define DRV_NAME "cros-ec-chardev"
/* Arbitrary bounded size for the event queue */
diff --git a/include/linux/platform_data/cros_ec_proto.h b/include/linux/platform_data/cros_ec_proto.h
index 02599687770c..6fa882768239 100644
--- a/include/linux/platform_data/cros_ec_proto.h
+++ b/include/linux/platform_data/cros_ec_proto.h
@@ -13,6 +13,7 @@
#include <linux/notifier.h>
#include <linux/platform_data/cros_ec_commands.h>
+#include <uapi/linux/cros_ec_chardev.h>
#define CROS_EC_DEV_NAME "cros_ec"
#define CROS_EC_DEV_FP_NAME "cros_fp"
@@ -54,24 +55,6 @@ enum {
EC_MAX_MSG_BYTES = 64 * 1024,
};
-/**
- * struct cros_ec_command - Information about a ChromeOS EC command.
- * @version: Command version number (often 0).
- * @command: Command to send (EC_CMD_...).
- * @outsize: Outgoing length in bytes.
- * @insize: Max number of bytes to accept from the EC.
- * @result: EC's response to the command (separate from communication failure).
- * @data: Where to put the incoming data from EC and outgoing data to EC.
- */
-struct cros_ec_command {
- uint32_t version;
- uint32_t command;
- uint32_t outsize;
- uint32_t insize;
- uint32_t result;
- uint8_t data[];
-};
-
/**
* struct cros_ec_device - Information about a ChromeOS EC device.
* @phys_name: Name of physical comms layer (e.g. 'i2c-4').
diff --git a/include/linux/platform_data/cros_ec_chardev.h b/include/uapi/linux/cros_ec_chardev.h
similarity index 55%
rename from include/linux/platform_data/cros_ec_chardev.h
rename to include/uapi/linux/cros_ec_chardev.h
index 7de8faaf77df..61f8690e86c4 100644
--- a/include/linux/platform_data/cros_ec_chardev.h
+++ b/include/uapi/linux/cros_ec_chardev.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
* ChromeOS EC device interface.
*
@@ -8,13 +8,26 @@
#ifndef _UAPI_LINUX_CROS_EC_DEV_H_
#define _UAPI_LINUX_CROS_EC_DEV_H_
-#include <linux/bits.h>
#include <linux/ioctl.h>
#include <linux/types.h>
-#include <linux/platform_data/cros_ec_commands.h>
-
-#define CROS_EC_DEV_VERSION "1.0.0"
+/**
+ * struct cros_ec_command - Information about a ChromeOS EC command.
+ * @version: Command version number (often 0).
+ * @command: Command to send (EC_CMD_...).
+ * @outsize: Outgoing length in bytes.
+ * @insize: Max number of bytes to accept from the EC.
+ * @result: EC's response to the command (separate from communication failure).
+ * @data: Where to put the incoming data from EC and outgoing data to EC.
+ */
+struct cros_ec_command {
+ __u32 version;
+ __u32 command;
+ __u32 outsize;
+ __u32 insize;
+ __u32 result;
+ __u8 data[];
+};
/**
* struct cros_ec_readmem - Struct used to read mapped memory.
@@ -25,9 +38,9 @@
* read or negative on error.
*/
struct cros_ec_readmem {
- uint32_t offset;
- uint32_t bytes;
- uint8_t buffer[EC_MEMMAP_SIZE];
+ __u32 offset;
+ __u32 bytes;
+ __u8 buffer[255];
};
#define CROS_EC_DEV_IOC 0xEC
@@ -35,4 +48,4 @@ struct cros_ec_readmem {
#define CROS_EC_DEV_IOCRDMEM _IOWR(CROS_EC_DEV_IOC, 1, struct cros_ec_readmem)
#define CROS_EC_DEV_IOCEVENTMASK _IO(CROS_EC_DEV_IOC, 2)
-#endif /* _CROS_EC_DEV_H_ */
+#endif /* _UAPI_LINUX_CROS_EC_DEV_H_ */
base-commit: 8bb7eca972ad531c9b149c0a51ab43a417385813
--
https://chromeos.dev
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