From 61598093bbdd283a7edc367d900f223070ead8d2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:43:03 +0000
Subject: [PATCH] add ax88772C AX88772C_eeprom_tools
---
kernel/drivers/i2c/busses/i2c-altera.c | 39 ++++++++++-----------------------------
1 files changed, 10 insertions(+), 29 deletions(-)
diff --git a/kernel/drivers/i2c/busses/i2c-altera.c b/kernel/drivers/i2c/busses/i2c-altera.c
index 1d59eed..7d62cbd 100644
--- a/kernel/drivers/i2c/busses/i2c-altera.c
+++ b/kernel/drivers/i2c/busses/i2c-altera.c
@@ -1,17 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright Intel Corporation (C) 2017.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope 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.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program. If not, see <http://www.gnu.org/licenses/>.
*
* Based on the i2c-axxia.c driver.
*/
@@ -80,7 +69,6 @@
* @fifo_size: size of the FIFO passed in.
* @isr_mask: cached copy of local ISR enables.
* @isr_status: cached copy of local ISR status.
- * @lock: spinlock for IRQ synchronization.
* @isr_mutex: mutex for IRQ thread.
*/
struct altr_i2c_dev {
@@ -97,17 +85,13 @@
u32 fifo_size;
u32 isr_mask;
u32 isr_status;
- spinlock_t lock; /* IRQ synchronization */
struct mutex isr_mutex;
};
static void
altr_i2c_int_enable(struct altr_i2c_dev *idev, u32 mask, bool enable)
{
- unsigned long flags;
u32 int_en;
-
- spin_lock_irqsave(&idev->lock, flags);
int_en = readl(idev->base + ALTR_I2C_ISER);
if (enable)
@@ -116,8 +100,6 @@
idev->isr_mask = int_en & ~mask;
writel(idev->isr_mask, idev->base + ALTR_I2C_ISER);
-
- spin_unlock_irqrestore(&idev->lock, flags);
}
static void altr_i2c_int_clear(struct altr_i2c_dev *idev, u32 mask)
@@ -160,7 +142,7 @@
(ALTR_I2C_THRESHOLD << ALTR_I2C_CTRL_TCT_SHFT);
u32 t_high, t_low;
- if (idev->bus_clk_rate <= 100000) {
+ if (idev->bus_clk_rate <= I2C_MAX_STANDARD_MODE_FREQ) {
tmp &= ~ALTR_I2C_CTRL_BSPEED;
/* Standard mode SCL 50/50 */
t_high = divisor * 1 / 2;
@@ -357,6 +339,7 @@
time_left = wait_for_completion_timeout(&idev->msg_complete,
ALTR_I2C_XFER_TIMEOUT);
+ mutex_lock(&idev->isr_mutex);
altr_i2c_int_enable(idev, imask, false);
value = readl(idev->base + ALTR_I2C_STATUS) & ALTR_I2C_STAT_CORE;
@@ -369,6 +352,7 @@
}
altr_i2c_core_disable(idev);
+ mutex_unlock(&idev->isr_mutex);
return idev->msg_err;
}
@@ -400,23 +384,19 @@
static int altr_i2c_probe(struct platform_device *pdev)
{
struct altr_i2c_dev *idev = NULL;
- struct resource *res;
int irq, ret;
idev = devm_kzalloc(&pdev->dev, sizeof(*idev), GFP_KERNEL);
if (!idev)
return -ENOMEM;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- idev->base = devm_ioremap_resource(&pdev->dev, res);
+ idev->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(idev->base))
return PTR_ERR(idev->base);
irq = platform_get_irq(pdev, 0);
- if (irq < 0) {
- dev_err(&pdev->dev, "missing interrupt resource\n");
+ if (irq < 0)
return irq;
- }
idev->i2c_clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(idev->i2c_clk)) {
@@ -426,7 +406,6 @@
idev->dev = &pdev->dev;
init_completion(&idev->msg_complete);
- spin_lock_init(&idev->lock);
mutex_init(&idev->isr_mutex);
ret = device_property_read_u32(idev->dev, "fifo-size",
@@ -441,10 +420,10 @@
&idev->bus_clk_rate);
if (ret) {
dev_err(&pdev->dev, "Default to 100kHz\n");
- idev->bus_clk_rate = 100000; /* default clock rate */
+ idev->bus_clk_rate = I2C_MAX_STANDARD_MODE_FREQ; /* default clock rate */
}
- if (idev->bus_clk_rate > 400000) {
+ if (idev->bus_clk_rate > I2C_MAX_FAST_MODE_FREQ) {
dev_err(&pdev->dev, "invalid clock-frequency %d\n",
idev->bus_clk_rate);
return -EINVAL;
@@ -464,7 +443,9 @@
return ret;
}
+ mutex_lock(&idev->isr_mutex);
altr_i2c_init(idev);
+ mutex_unlock(&idev->isr_mutex);
i2c_set_adapdata(&idev->adapter, idev);
strlcpy(idev->adapter.name, pdev->name, sizeof(idev->adapter.name));
--
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