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Message-Id: <20191210100645.12138-1-enric.balletbo@collabora.com>
Date: Tue, 10 Dec 2019 11:06:45 +0100
From: Enric Balletbo i Serra <enric.balletbo@...labora.com>
To: linux-kernel@...r.kernel.org
Cc: Collabora Kernel ML <kernel@...labora.com>, groeck@...omium.org,
bleung@...omium.org, dtor@...omium.org, gwendal@...omium.org,
Jonathan Cameron <Jonathan.Cameron@...wei.com>,
Lee Jones <lee.jones@...aro.org>,
Evan Green <evgreen@...omium.org>
Subject: [PATCH] platform/chrome: cros_ec: Match implementation with headers
The 'cros_ec' core driver is the common interface for the cros_ec
transport drivers to do the shared operations to register, unregister,
suspend and resume. The interface is provided by including the header
'include/linux/platform_data/cros_ec_proto.h', however, instead of have
the implementation of these functions in cros_ec_proto.c, it is in
'cros_ec.c', which is a different kernel module. Apart from being a bad
practice, this can induce confusions allowing the users of the cros_ec
protocol to call these functions.
The register, unregister, suspend and resume functions *should* only be
called by the different transport drivers (i2c, spi, lpc, etc.), so make
this a bit less confusing by moving these functions from the public
in-kernel space to a private include in platform/chrome, and then, the
interface for cros_ec module and for the cros_ec_proto module is clean.
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
---
drivers/platform/chrome/cros_ec.c | 2 ++
drivers/platform/chrome/cros_ec.h | 25 +++++++++++++++++++++
drivers/platform/chrome/cros_ec_i2c.c | 2 ++
drivers/platform/chrome/cros_ec_ishtp.c | 2 ++
drivers/platform/chrome/cros_ec_lpc.c | 1 +
drivers/platform/chrome/cros_ec_rpmsg.c | 2 ++
drivers/platform/chrome/cros_ec_spi.c | 2 ++
include/linux/platform_data/cros_ec_proto.h | 16 -------------
8 files changed, 36 insertions(+), 16 deletions(-)
create mode 100644 drivers/platform/chrome/cros_ec.h
diff --git a/drivers/platform/chrome/cros_ec.c b/drivers/platform/chrome/cros_ec.c
index 6d6ce86a1408..65c3207d2d90 100644
--- a/drivers/platform/chrome/cros_ec.c
+++ b/drivers/platform/chrome/cros_ec.c
@@ -18,6 +18,8 @@
#include <linux/suspend.h>
#include <asm/unaligned.h>
+#include "cros_ec.h"
+
#define CROS_EC_DEV_EC_INDEX 0
#define CROS_EC_DEV_PD_INDEX 1
diff --git a/drivers/platform/chrome/cros_ec.h b/drivers/platform/chrome/cros_ec.h
new file mode 100644
index 000000000000..dc80550f5eaa
--- /dev/null
+++ b/drivers/platform/chrome/cros_ec.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * ChromeOS Embedded Controller core interface.
+ *
+ * Copyright (C) 2012 Google, Inc
+ */
+
+#ifndef __CROS_EC_H
+#define __CROS_EC_H
+
+/*
+ * The EC is unresponsive for a time after a reboot command. Add a
+ * simple delay to make sure that the bus stays locked.
+ */
+#define EC_REBOOT_DELAY_MS 50
+
+int cros_ec_register(struct cros_ec_device *ec_dev);
+int cros_ec_unregister(struct cros_ec_device *ec_dev);
+
+int cros_ec_suspend(struct cros_ec_device *ec_dev);
+int cros_ec_resume(struct cros_ec_device *ec_dev);
+
+bool cros_ec_handle_event(struct cros_ec_device *ec_dev);
+
+#endif /* __CROS_EC_H */
diff --git a/drivers/platform/chrome/cros_ec_i2c.c b/drivers/platform/chrome/cros_ec_i2c.c
index 9bd97bc8454b..6119eccd8a18 100644
--- a/drivers/platform/chrome/cros_ec_i2c.c
+++ b/drivers/platform/chrome/cros_ec_i2c.c
@@ -14,6 +14,8 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
+#include "cros_ec.h"
+
/**
* Request format for protocol v3
* byte 0 0xda (EC_COMMAND_PROTOCOL_3)
diff --git a/drivers/platform/chrome/cros_ec_ishtp.c b/drivers/platform/chrome/cros_ec_ishtp.c
index e5996821d08b..e1fdb491a9a7 100644
--- a/drivers/platform/chrome/cros_ec_ishtp.c
+++ b/drivers/platform/chrome/cros_ec_ishtp.c
@@ -14,6 +14,8 @@
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/intel-ish-client-if.h>
+#include "cros_ec.h"
+
/*
* ISH TX/RX ring buffer pool size
*
diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c
index dccf479c6625..3e8ddd84bc41 100644
--- a/drivers/platform/chrome/cros_ec_lpc.c
+++ b/drivers/platform/chrome/cros_ec_lpc.c
@@ -23,6 +23,7 @@
#include <linux/printk.h>
#include <linux/suspend.h>
+#include "cros_ec.h"
#include "cros_ec_lpc_mec.h"
#define DRV_NAME "cros_ec_lpcs"
diff --git a/drivers/platform/chrome/cros_ec_rpmsg.c b/drivers/platform/chrome/cros_ec_rpmsg.c
index bd068afe43b5..dbc3f5523b83 100644
--- a/drivers/platform/chrome/cros_ec_rpmsg.c
+++ b/drivers/platform/chrome/cros_ec_rpmsg.c
@@ -13,6 +13,8 @@
#include <linux/rpmsg.h>
#include <linux/slab.h>
+#include "cros_ec.h"
+
#define EC_MSG_TIMEOUT_MS 200
#define HOST_COMMAND_MARK 1
#define HOST_EVENT_MARK 2
diff --git a/drivers/platform/chrome/cros_ec_spi.c b/drivers/platform/chrome/cros_ec_spi.c
index a831bd5a5b2f..46786d2d679a 100644
--- a/drivers/platform/chrome/cros_ec_spi.c
+++ b/drivers/platform/chrome/cros_ec_spi.c
@@ -14,6 +14,8 @@
#include <linux/spi/spi.h>
#include <uapi/linux/sched/types.h>
+#include "cros_ec.h"
+
/* The header byte, which follows the preamble */
#define EC_MSG_HEADER 0xec
diff --git a/include/linux/platform_data/cros_ec_proto.h b/include/linux/platform_data/cros_ec_proto.h
index 119b9951c055..f490e208540a 100644
--- a/include/linux/platform_data/cros_ec_proto.h
+++ b/include/linux/platform_data/cros_ec_proto.h
@@ -21,12 +21,6 @@
#define CROS_EC_DEV_SCP_NAME "cros_scp"
#define CROS_EC_DEV_TP_NAME "cros_tp"
-/*
- * The EC is unresponsive for a time after a reboot command. Add a
- * simple delay to make sure that the bus stays locked.
- */
-#define EC_REBOOT_DELAY_MS 50
-
/*
* Max bus-specific overhead incurred by request/responses.
* I2C requires 1 additional byte for requests.
@@ -206,10 +200,6 @@ struct cros_ec_dev {
#define to_cros_ec_dev(dev) container_of(dev, struct cros_ec_dev, class_dev)
-int cros_ec_suspend(struct cros_ec_device *ec_dev);
-
-int cros_ec_resume(struct cros_ec_device *ec_dev);
-
int cros_ec_prepare_tx(struct cros_ec_device *ec_dev,
struct cros_ec_command *msg);
@@ -222,10 +212,6 @@ int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev,
int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
struct cros_ec_command *msg);
-int cros_ec_register(struct cros_ec_device *ec_dev);
-
-int cros_ec_unregister(struct cros_ec_device *ec_dev);
-
int cros_ec_query_all(struct cros_ec_device *ec_dev);
int cros_ec_get_next_event(struct cros_ec_device *ec_dev,
@@ -238,8 +224,6 @@ int cros_ec_check_features(struct cros_ec_dev *ec, int feature);
int cros_ec_get_sensor_count(struct cros_ec_dev *ec);
-bool cros_ec_handle_event(struct cros_ec_device *ec_dev);
-
/**
* cros_ec_get_time_ns() - Return time in ns.
*
--
2.20.1
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