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/busses/i2c-stu300.c | 39 ++++++++++++++++-----------------------
1 files changed, 16 insertions(+), 23 deletions(-)
diff --git a/kernel/drivers/i2c/busses/i2c-stu300.c b/kernel/drivers/i2c/busses/i2c-stu300.c
index 5503fa1..64d739b 100644
--- a/kernel/drivers/i2c/busses/i2c-stu300.c
+++ b/kernel/drivers/i2c/busses/i2c-stu300.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2007-2012 ST-Ericsson AB
- * License terms: GNU General Public License (GPL) version 2
* ST DDC I2C master mode driver, used in e.g. U300 series platforms.
* Author: Linus Walleij <linus.walleij@stericsson.com>
* Author: Jonas Aaberg <jonas.aberg@stericsson.com>
@@ -132,7 +132,7 @@
#define NUM_ADDR_RESEND_ATTEMPTS 12
/* I2C clock speed, in Hz 0-400kHz*/
-static unsigned int scl_frequency = 100000;
+static unsigned int scl_frequency = I2C_MAX_STANDARD_MODE_FREQ;
module_param(scl_frequency, uint, 0644);
/**
@@ -328,12 +328,6 @@
{
int ret;
- if (unlikely(irqs_disabled())) {
- /* TODO: implement polling for this case if need be. */
- WARN(1, "irqs are disabled, cannot poll for event\n");
- return -EIO;
- }
-
/* Lock command issue, fill in an event we wait for */
spin_lock_irq(&dev->cmd_issue_lock);
init_completion(&dev->cmd_complete);
@@ -379,13 +373,6 @@
enum stu300_event mr_event)
{
int ret;
-
- if (unlikely(irqs_disabled())) {
- /* TODO: implement polling for this case if need be. */
- dev_err(&dev->pdev->dev, "irqs are disabled on this "
- "system!\n");
- return -EIO;
- }
/* Is it already here? */
spin_lock_irq(&dev->cmd_issue_lock);
@@ -457,7 +444,7 @@
"Attempt: %d\n", i+1);
dev_err(&dev->pdev->dev, "base address = "
- "0x%08x, reinit hardware\n", (u32) dev->virtbase);
+ "0x%p, reinit hardware\n", dev->virtbase);
(void) stu300_init_hw(dev);
}
@@ -510,7 +497,7 @@
dev_dbg(&dev->pdev->dev, "Clock rate %lu Hz, I2C bus speed %d Hz "
"virtbase %p\n", clkrate, dev->speed, dev->virtbase);
- if (dev->speed > 100000)
+ if (dev->speed > I2C_MAX_STANDARD_MODE_FREQ)
/* Fast Mode I2C */
val = ((clkrate/dev->speed) - 9)/3 + 1;
else
@@ -531,7 +518,7 @@
return -EINVAL;
}
- if (dev->speed > 100000) {
+ if (dev->speed > I2C_MAX_STANDARD_MODE_FREQ) {
/* CC6..CC0 */
stu300_wr8((val & I2C_CCR_CC_MASK) | I2C_CCR_FMSM,
dev->virtbase + I2C_CCR);
@@ -846,6 +833,13 @@
return num;
}
+static int stu300_xfer_todo(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
+{
+ /* TODO: implement polling for this case if need be. */
+ WARN(1, "%s: atomic transfers not implemented\n", dev_name(&adap->dev));
+ return -EOPNOTSUPP;
+}
+
static u32 stu300_func(struct i2c_adapter *adap)
{
/* This is the simplest thing you can think of... */
@@ -853,8 +847,9 @@
}
static const struct i2c_algorithm stu300_algo = {
- .master_xfer = stu300_xfer,
- .functionality = stu300_func,
+ .master_xfer = stu300_xfer,
+ .master_xfer_atomic = stu300_xfer_todo,
+ .functionality = stu300_func,
};
static const struct i2c_adapter_quirks stu300_quirks = {
@@ -865,7 +860,6 @@
{
struct stu300_dev *dev;
struct i2c_adapter *adap;
- struct resource *res;
int bus_nr;
int ret = 0;
@@ -881,8 +875,7 @@
}
dev->pdev = pdev;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- dev->virtbase = devm_ioremap_resource(&pdev->dev, res);
+ dev->virtbase = devm_platform_ioremap_resource(pdev, 0);
dev_dbg(&pdev->dev, "initialize bus device I2C%d on virtual "
"base %p\n", bus_nr, dev->virtbase);
if (IS_ERR(dev->virtbase))
--
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