From 5c4412e0728063583ec971323f8256e8005a32b6 Mon Sep 17 00:00:00 2001 From: Daniel Golle Date: Fri, 20 Jan 2017 14:28:25 +0100 Subject: [PATCH] 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 6ac8579b96e3b) 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 Signed-off-by: Gabor Juhos Signed-off-by: Mathias Kresin Signed-off-by: Stanislaw Gruszka Signed-off-by: Kalle Valo --- .../net/wireless/ralink/rt2x00/rt2800lib.c | 31 ++++++++++++++++++- 1 file changed, 30 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c index 8ea844d35ecb..5ae2950890bc 100644 --- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c +++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c @@ -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: -- 2.39.5