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rt2x00: rt2800lib: add support for RT3352 with 20MHz crystal 

On Rt3352 the driver needs to know the frequency of an external
crystal which can be either 40 MHz (as on all other WiSoCs until now)
or 20 MHz.
Get the clock attached by ramips WiSoC platform code which probes
SYSC_REG_SYSCFG (added by John Crispin in commit 6ac8579b96) and
introduce a new flag clk_is_20mhz in struct hw_mode_spec to make the
driver aware and use either 40 MHz or 20 MHz specific rf_vals on those
WiSoC platforms.
The introduced support for boards with a 20 MHz crystal is also needed
for RT5350.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Mathias Kresin <dev@kresin.me>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Daniel Golle 2017-01-20 14:28:25 +01:00 committed by Kalle Valo
parent 34db70b92f
commit 5c4412e072
1 changed files with 30 additions and 1 deletions
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31
drivers/net/wireless/ralink/rt2x00/rt2800lib.c
View File

@ -1935,6 +1935,11 @@ static void rt2800_config_lna_gain(struct rt2x00_dev *rt2x00dev,
rt2x00dev->lna_gain = lna_gain;
}
static inline bool rt2800_clk_is_20mhz(struct rt2x00_dev *rt2x00dev)
{
return clk_get_rate(rt2x00dev->clk) == 20000000;
}
#define FREQ_OFFSET_BOUND 0x5f
static void rt2800_freq_cal_mode1(struct rt2x00_dev *rt2x00dev)
@ -7426,6 +7431,27 @@ static const struct rf_channel rf_vals_3x[] = {
{173, 0x61, 0, 9},
};
/*
* RF value list for rt3xxx with Xtal20MHz
* Supports: 2.4 GHz (all) (RF3322)
*/
static const struct rf_channel rf_vals_3x_xtal20[] = {
{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 const struct rf_channel rf_vals_5592_xtal20[] = {
/* Channel, N, K, mod, R */
{1, 482, 4, 10, 3},
@ -7654,7 +7680,10 @@ static int rt2800_probe_hw_mode(struct rt2x00_dev *rt2x00dev)
case RF5390:
case RF5392:
spec->num_channels = 14;
spec->channels = rf_vals_3x;
if (rt2800_clk_is_20mhz(rt2x00dev))
spec->channels = rf_vals_3x_xtal20;
else
spec->channels = rf_vals_3x;
break;
case RF3052: