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ASoC: arizona: Add defines for FLL configuration constants

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Improve readability by adding defines for some of the constants
associated with FLL configuration.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Charles Keepax 2014-03-07 16:34:18 +00:00 committed by Mark Brown
parent da28ed585b
commit 87383ac5a7
1 changed files with 11 additions and 5 deletions
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16
sound/soc/codecs/arizona.c
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@ -53,6 +53,12 @@
#define ARIZONA_AIF_RX_ENABLES 0x1A
#define ARIZONA_AIF_FORCE_WRITE 0x1B
#define ARIZONA_FLL_MAX_FREF 13500000
#define ARIZONA_FLL_MIN_FVCO 90000000
#define ARIZONA_FLL_MAX_REFDIV 8
#define ARIZONA_FLL_MIN_OUTDIV 2
#define ARIZONA_FLL_MAX_OUTDIV 7
#define arizona_fll_err(_fll, fmt, ...) \
dev_err(_fll->arizona->dev, "FLL%d: " fmt, _fll->id, ##__VA_ARGS__)
#define arizona_fll_warn(_fll, fmt, ...) \
@ -1390,11 +1396,11 @@ static int arizona_calc_fll(struct arizona_fll *fll,
/* Fref must be <=13.5MHz */
div = 1;
cfg->refdiv = 0;
while ((Fref / div) > 13500000) {
while ((Fref / div) > ARIZONA_FLL_MAX_FREF) {
div *= 2;
cfg->refdiv++;
if (div > 8) {
if (div > ARIZONA_FLL_MAX_REFDIV) {
arizona_fll_err(fll,
"Can't scale %dMHz in to <=13.5MHz\n",
Fref);
@ -1406,10 +1412,10 @@ static int arizona_calc_fll(struct arizona_fll *fll,
Fref /= div;
/* Fvco should be over the targt; don't check the upper bound */
div = 2;
while (Fout * div < 90000000 * fll->vco_mult) {
div = ARIZONA_FLL_MIN_OUTDIV;
while (Fout * div < ARIZONA_FLL_MIN_FVCO * fll->vco_mult) {
div++;
if (div > 7) {
if (div > ARIZONA_FLL_MAX_OUTDIV) {
arizona_fll_err(fll, "No FLL_OUTDIV for Fout=%uHz\n",
Fout);
return -EINVAL;