text: --- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  +++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  @@ -8186,6 +8186,27 @@ static const struct rf_channel rf_vals_5
   	{196, 83, 0, 12, 1},
   };
   
  +/*
  + * RF value list for rt3xxx with Xtal20MHz
  + * Supports: 2.4 GHz (all) (RF3322)
  + */
  +static const struct rf_channel rf_vals_xtal20mhz_3x[] = {
  +	{1,    0xE2,	 2,  0x14},
  +	{2,    0xE3,	 2,  0x14},
  +	{3,    0xE4,	 2,  0x14},
  +	{4,    0xE5,	 2,  0x14},
  +	{5,    0xE6,	 2,  0x14},
  +	{6,    0xE7,	 2,  0x14},
  +	{7,    0xE8,	 2,  0x14},
  +	{8,    0xE9,	 2,  0x14},
  +	{9,    0xEA,	 2,  0x14},
  +	{10,   0xEB,	 2,  0x14},
  +	{11,   0xEC,	 2,  0x14},
  +	{12,   0xED,	 2,  0x14},
  +	{13,   0xEE,	 2,  0x14},
  +	{14,   0xF0,	 2,  0x18},
  +};
  +
   static int rt2800_probe_hw_mode(struct rt2x00_dev *rt2x00dev)
   {
   	struct hw_mode_spec *spec = &rt2x00dev->spec;
  @@ -8272,7 +8293,10 @@ static int rt2800_probe_hw_mode(struct r
   	case RF5390:
   	case RF5392:
   		spec->num_channels = 14;
  -		spec->channels = rf_vals_3x;
  +		if (spec->clk_is_20mhz)
  +			spec->channels = rf_vals_xtal20mhz_3x;
  +		else
  +			spec->channels = rf_vals_3x;
   		break;
   
   	case RF3052:
  @@ -8456,6 +8480,19 @@ static int rt2800_probe_rt(struct rt2x00
   	return 0;
   }
   
  +int rt2800_probe_clk(struct rt2x00_dev *rt2x00dev)
  +{
  +	struct rt2x00_platform_data *pdata = rt2x00dev->dev->platform_data;
  +	struct hw_mode_spec *spec = &rt2x00dev->spec;
  +
  +	if (!pdata)
  +		return -EINVAL;
  +
  +	spec->clk_is_20mhz = pdata->clk_is_20mhz;
  +
  +	return 0;
  +}
  +
   int rt2800_probe_hw(struct rt2x00_dev *rt2x00dev)
   {
   	struct rt2800_drv_data *drv_data = rt2x00dev->drv_data;
  @@ -8498,6 +8535,15 @@ int rt2800_probe_hw(struct rt2x00_dev *r
   	rt2800_register_write(rt2x00dev, GPIO_CTRL, reg);
   
   	/*
  +	 * Probe SoC clock.
  +	 */
  +	if (rt2x00_is_soc(rt2x00dev)) {
  +		retval = rt2800_probe_clk(rt2x00dev);
  +		if (retval)
  +			return retval;
  +	}
  +
  +	/*
   	 * Initialize hw specifications.
   	 */
   	retval = rt2800_probe_hw_mode(rt2x00dev);
  --- a/drivers/net/wireless/ralink/rt2x00/rt2x00.h
  +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00.h
  @@ -400,6 +400,7 @@ static inline struct rt2x00_intf* vif_to
    * @channels: Device/chipset specific channel values (See &struct rf_channel).
    * @channels_info: Additional information for channels (See &struct channel_info).
    * @ht: Driver HT Capabilities (See &ieee80211_sta_ht_cap).
  + * @clk_is_20mhz: External crystal of WiSoC is 20MHz instead of 40MHz
    */
   struct hw_mode_spec {
   	unsigned int supported_bands;
  @@ -416,6 +417,7 @@ struct hw_mode_spec {
   	const struct channel_info *channels_info;
   
   	struct ieee80211_sta_ht_cap ht;
  +	int clk_is_20mhz;
   };
   
   /*
  --- a/include/linux/rt2x00_platform.h
  +++ b/include/linux/rt2x00_platform.h
  @@ -18,6 +18,7 @@ struct rt2x00_platform_data {
   
   	int disable_2ghz;
   	int disable_5ghz;
  +	int clk_is_20mhz;
   };
   
   #endif /* _RT2X00_PLATFORM_H */
  