fix i2c driver

Signed-off-by: Ze-Hou <yingkezhou@qq.com>

Author: Ze-Hou

bsp/k230/drivers/interdrv/i2c/drv_i2c.c

@@ -147,7 +147,7 @@ static int i2c_set_bus_speed(struct k230_i2c_dev *dev, rt_uint32_t speed)
      * spklen = 0~50ns
      */
 
-    spklen = 10 / (1e9 / dev->clock);
+    spklen = dev->clock * 10 / 1e9;
     ft = dev->clock * 10 / 1e9;
     period = dev->clock / speed;
     period = period - spklen - 7 - 1 - ft;
@@ -576,9 +576,8 @@ static const struct dfs_file_ops eeprom_fops =
 
 int i2c_slave_eeprom_init(void) {
     int ret = 0;
-
     rt_device_t device = &eeprom.device;
-    device->fops = &eeprom_fops;
+
     ret = rt_device_register(device, "i2c-slv-eeprom", RT_DEVICE_FLAG_RDWR);
     if (ret)
     {