From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/drivers/i2c/algos/i2c-algo-bit.c | 47 ++++++++++++++++++++++++++++-------------------
1 files changed, 28 insertions(+), 19 deletions(-)
diff --git a/kernel/drivers/i2c/algos/i2c-algo-bit.c b/kernel/drivers/i2c/algos/i2c-algo-bit.c
index c33dcfb..913db01 100644
--- a/kernel/drivers/i2c/algos/i2c-algo-bit.c
+++ b/kernel/drivers/i2c/algos/i2c-algo-bit.c
@@ -1,21 +1,12 @@
-/* -------------------------------------------------------------------------
- * i2c-algo-bit.c i2c driver algorithms for bit-shift adapters
- * -------------------------------------------------------------------------
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * i2c-algo-bit.c: i2c driver algorithms for bit-shift adapters
+ *
* Copyright (C) 1995-2000 Simon G. Vogl
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- * ------------------------------------------------------------------------- */
-
-/* With some changes from Frodo Looijaard <frodol@dds.nl>, Kyösti Mälkki
- <kmalkki@cc.hut.fi> and Jean Delvare <jdelvare@suse.de> */
+ *
+ * With some changes from Frodo Looijaard <frodol@dds.nl>, Kyösti Mälkki
+ * <kmalkki@cc.hut.fi> and Jean Delvare <jdelvare@suse.de>
+ */
#include <linux/kernel.h>
#include <linux/module.h>
@@ -612,6 +603,23 @@
return ret;
}
+/*
+ * We print a warning when we are not flagged to support atomic transfers but
+ * will try anyhow. That's what the I2C core would do as well. Sadly, we can't
+ * modify the algorithm struct at probe time because this struct is exported
+ * 'const'.
+ */
+static int bit_xfer_atomic(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[],
+ int num)
+{
+ struct i2c_algo_bit_data *adap = i2c_adap->algo_data;
+
+ if (!adap->can_do_atomic)
+ dev_warn(&i2c_adap->dev, "not flagged for atomic transfers\n");
+
+ return bit_xfer(i2c_adap, msgs, num);
+}
+
static u32 bit_func(struct i2c_adapter *adap)
{
return I2C_FUNC_I2C | I2C_FUNC_NOSTART | I2C_FUNC_SMBUS_EMUL |
@@ -624,8 +632,9 @@
/* -----exported algorithm data: ------------------------------------- */
const struct i2c_algorithm i2c_bit_algo = {
- .master_xfer = bit_xfer,
- .functionality = bit_func,
+ .master_xfer = bit_xfer,
+ .master_xfer_atomic = bit_xfer_atomic,
+ .functionality = bit_func,
};
EXPORT_SYMBOL(i2c_bit_algo);
--
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