[PATCH v3 05/12] crypto: atmel-i2c - move client management instance into core

[Lothar Rubusch]

Move the global 'atmel_i2c_mgmt' tracking instance out of the ECC driver
and into the atmel-i2c core library.

This change consolidates the shared I2C client infrastructure into a
central core driver. This centralization allows both the ECC and
upcoming SHA204A driver modules to access and reference a unified,
common device-management context.

As part of this relocation, replace the explicit runtime initialization
calls inside the module init block with static, compile-time macros
(__SPIN_LOCK_UNLOCKED and LIST_HEAD_INIT). Export the tracking structure
via EXPORT_SYMBOL_GPL() to make it available to dependent sub-modules.

No functional change intended.

Signed-off-by: Lothar Rubusch <l.rubusch at gmail.com>
---
 drivers/crypto/atmel-ecc.c | 4 ----
 drivers/crypto/atmel-i2c.c | 6 ++++++
 drivers/crypto/atmel-i2c.h | 1 +
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/crypto/atmel-ecc.c b/drivers/crypto/atmel-ecc.c
index b06d47babd2e..cf6abc94d6c9 100644
--- a/drivers/crypto/atmel-ecc.c
+++ b/drivers/crypto/atmel-ecc.c
@@ -26,8 +26,6 @@
 static DEFINE_MUTEX(atmel_ecc_kpp_lock);
 static int atmel_ecc_kpp_refcnt;
 
-static struct atmel_i2c_client_mgmt atmel_i2c_mgmt;
-
 /**
  * struct atmel_ecdh_ctx - transformation context
  * @client     : pointer to i2c client device
@@ -408,8 +406,6 @@ static struct i2c_driver atmel_ecc_driver = {
 
 static int __init atmel_ecc_init(void)
 {
-	spin_lock_init(&atmel_i2c_mgmt.i2c_list_lock);
-	INIT_LIST_HEAD(&atmel_i2c_mgmt.i2c_client_list);
 	return i2c_add_driver(&atmel_ecc_driver);
 }
 
diff --git a/drivers/crypto/atmel-i2c.c b/drivers/crypto/atmel-i2c.c
index 0e275dbdc8c5..db24f65ae90e 100644
--- a/drivers/crypto/atmel-i2c.c
+++ b/drivers/crypto/atmel-i2c.c
@@ -21,6 +21,12 @@
 #include <linux/workqueue.h>
 #include "atmel-i2c.h"
 
+struct atmel_i2c_client_mgmt atmel_i2c_mgmt = {
+	.i2c_list_lock = __SPIN_LOCK_UNLOCKED(atmel_i2c_mgmt.i2c_list_lock),
+	.i2c_client_list = LIST_HEAD_INIT(atmel_i2c_mgmt.i2c_client_list),
+};
+EXPORT_SYMBOL_GPL(atmel_i2c_mgmt);
+
 static const struct {
 	u8 value;
 	const char *error_text;
diff --git a/drivers/crypto/atmel-i2c.h b/drivers/crypto/atmel-i2c.h
index 30ed816814af..d54bd836e0f5 100644
--- a/drivers/crypto/atmel-i2c.h
+++ b/drivers/crypto/atmel-i2c.h
@@ -119,6 +119,7 @@ struct atmel_i2c_client_mgmt {
 	struct list_head i2c_client_list;
 	spinlock_t i2c_list_lock;
 } ____cacheline_aligned;
+extern struct atmel_i2c_client_mgmt atmel_i2c_mgmt;
 
 /**
  * atmel_i2c_client_priv - i2c_client private data
-- 
2.39.5