add ax88772C AX88772C_eeprom_tools

hc

2024-05-10 61598093bbdd283a7edc367d900f223070ead8d2

 kernel/drivers/i2c/busses/i2c-diolan-u2c.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Driver for the Diolan u2c-12 USB-I2C adapter
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  *
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@@ -6,10 +7,6 @@
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  * Derived from:
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  *  i2c-tiny-usb.c
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  *  Copyright (C) 2006-2007 Till Harbaum (Till@Harbaum.org)
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License as
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- * published by the Free Software Foundation, version 2.
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  */
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 #include <linux/kernel.h>
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@@ -67,8 +64,6 @@
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 #define U2C_I2C_SPEED_2KHZ	242	/* 2 kHz, minimum speed */
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 #define U2C_I2C_SPEED(f)	((DIV_ROUND_UP(1000000, (f)) - 10) / 2 + 1)
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-#define U2C_I2C_FREQ_FAST	400000
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-#define U2C_I2C_FREQ_STD	100000
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 #define U2C_I2C_FREQ(s)		(1000000 / (2 * (s - 1) + 10))
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 #define DIOLAN_USB_TIMEOUT	100	/* in ms */
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@@ -90,7 +85,7 @@
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 	int ocount;			/* Number of enqueued messages */
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 };
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-static uint frequency = U2C_I2C_FREQ_STD;	/* I2C clock frequency in Hz */
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+static uint frequency = I2C_MAX_STANDARD_MODE_FREQ;	/* I2C clock frequency in Hz */
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 module_param(frequency, uint, S_IRUGO | S_IWUSR);
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 MODULE_PARM_DESC(frequency, "I2C clock frequency in hertz");
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@@ -302,12 +297,12 @@
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 {
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 	int speed, ret;
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-	if (frequency >= 200000) {
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+	if (frequency >= 2 * I2C_MAX_STANDARD_MODE_FREQ) {
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 		speed = U2C_I2C_SPEED_FAST;
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-		frequency = U2C_I2C_FREQ_FAST;
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-	} else if (frequency >= 100000 || frequency == 0) {
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+		frequency = I2C_MAX_FAST_MODE_FREQ;
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+	} else if (frequency >= I2C_MAX_STANDARD_MODE_FREQ || frequency == 0) {
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 		speed = U2C_I2C_SPEED_STD;
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-		frequency = U2C_I2C_FREQ_STD;
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+		frequency = I2C_MAX_STANDARD_MODE_FREQ;
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 	} else {
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 		speed = U2C_I2C_SPEED(frequency);
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 		if (speed > U2C_I2C_SPEED_2KHZ)