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ssp: Move conversion from SSCR3 value to RFL to bit description section 

This conversion in source code looks quite magic. It should be described
in header file where are registers bits description.

Signed-off-by: Karol Trzcinski <karolx.trzcinski@linux.intel.com>
This commit is contained in:
Karol Trzcinski 2020-02-13 12:12:50 +01:00 committed by Liam Girdwood
parent f606940480
commit 69b03e4310
2 changed files with 3 additions and 1 deletions
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2
src/drivers/intel/cavs/ssp.c
View File

@ -57,7 +57,7 @@ static void ssp_empty_rx_fifo(struct dai *dai)
/* empty fifo */
if (sssr & SSSR_RNE) {
entries = (ssp_read(dai, SSCR3) & SSCR3_RFL_MASK) >> 8;
entries = SSCR3_RFL_VAL(ssp_read(dai, SSCR3));
for (i = 0; i < entries + 1; i++)
ssp_read(dai, SSDR);
}

2
src/include/sof/drivers/ssp.h
View File

@ -192,6 +192,8 @@ extern const struct dai_driver ssp_driver;
#define SSCR3_TFL_MASK (0x0000003f)
#define SSCR3_RFL_MASK (0x00003f00)
#define SSCR3_TFL_VAL(scr3_val) (((scr3_val) >> 0) & MASK(5, 0))
#define SSCR3_RFL_VAL(scr3_val) (((scr3_val) >> 8) & MASK(5, 0))
#define SSCR3_TFT_MASK (0x003f0000)
#define SSCR3_TX(x) (((x) - 1) << 16)
#define SSCR3_RFT_MASK (0x3f000000)