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fw/tuner_e4k: Avoid dual read of DC4 when generating DC table 

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
This commit is contained in:
Sylvain Munaut 2012-04-01 21:33:25 +02:00 committed by Harald Welte
parent 20487e8cb3
commit f1939647b4
1 changed files with 4 additions and 3 deletions
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7
firmware/src/tuner_e4k.c
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@ -802,7 +802,7 @@ int e4k_dc_offset_gen_table(struct e4k_state *e4k)
/* iterate over all mixer + if_stage_1 gain combinations */
for (i = 0; i < ARRAY_SIZE(dc_gain_comb); i++) {
uint8_t offs_i, offs_q, range_i, range_q;
uint8_t offs_i, offs_q, range, range_i, range_q;
/* set the combination of mixer / if1 gain */
e4k_mixer_gain_set(e4k, dc_gain_comb[i].mixer_gain);
@ -814,8 +814,9 @@ int e4k_dc_offset_gen_table(struct e4k_state *e4k)
/* extract I/Q offset and range values */
offs_i = e4k_reg_read(e4k, E4K_REG_DC2) & 0x3F;
offs_q = e4k_reg_read(e4k, E4K_REG_DC3) & 0x3F;
range_i = e4k_reg_read(e4k, E4K_REG_DC4) & 0x3;
range_q = (e4k_reg_read(e4k, E4K_REG_DC4) >> 4) & 0x3;
range = e4k_reg_read(e4k, E4K_REG_DC4);
range_i = range & 0x3;
range_q = (range >> 4) & 0x3;
LOGP(DTUN, LOGL_DEBUG, "Table %u I=%u/%u, Q=%u/%u\n",
i, range_i, offs_i, range_q, offs_q);