Change the busy loop delays with usleep_range or msleep calls.

Signed-off-by: Peter Ujfalusi peter.ujfalusi@nokia.com ---

Hello,

Changes since v1: - offset cancellation in twl4030_init_chip has been optimized

Peter

sound/soc/codecs/twl4030.c | 31 +++++++++++++++++++++++-------- 1 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c index cbebec6..a6ceddb 100644 --- a/sound/soc/codecs/twl4030.c +++ b/sound/soc/codecs/twl4030.c @@ -233,6 +233,16 @@ static int twl4030_write(struct snd_soc_codec *codec, return 0; }

+static inline void twl4030_wait_ms(int time) +{ + if (time < 60) { + time *= 1000; + usleep_range(time, time + 500); + } else { + msleep(time); + } +} + static void twl4030_codec_enable(struct snd_soc_codec *codec, int enable) { struct twl4030_priv *twl4030 = snd_soc_codec_get_drvdata(codec); @@ -338,10 +348,14 @@ static void twl4030_init_chip(struct snd_soc_codec *codec) twl4030_write(codec, TWL4030_REG_ANAMICL, reg | TWL4030_CNCL_OFFSET_START);

- /* wait for offset cancellation to complete */ + /* + * Wait for offset cancellation to complete. + * Since this takes a while, do not slam the i2c. + * Start polling the status after ~20ms. + */ + msleep(20); do { - /* this takes a little while, so don't slam i2c */ - udelay(2000); + usleep_range(1000, 2000); twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &byte, TWL4030_REG_ANAMICL); } while ((i++ < 100) && @@ -725,9 +739,12 @@ static void headset_ramp(struct snd_soc_codec *codec, int ramp) /* Base values for ramp delay calculation: 2^19 - 2^26 */ unsigned int ramp_base[] = {524288, 1048576, 2097152, 4194304, 8388608, 16777216, 33554432, 67108864}; + unsigned int delay;

hs_gain = twl4030_read_reg_cache(codec, TWL4030_REG_HS_GAIN_SET); hs_pop = twl4030_read_reg_cache(codec, TWL4030_REG_HS_POPN_SET); + delay = (ramp_base[(hs_pop & TWL4030_RAMP_DELAY) >> 2] / + twl4030->sysclk) + 1;

/* Enable external mute control, this dramatically reduces * the pop-noise */ @@ -751,16 +768,14 @@ static void headset_ramp(struct snd_soc_codec *codec, int ramp) hs_pop |= TWL4030_RAMP_EN; twl4030_write(codec, TWL4030_REG_HS_POPN_SET, hs_pop); /* Wait ramp delay time + 1, so the VMID can settle */ - mdelay((ramp_base[(hs_pop & TWL4030_RAMP_DELAY) >> 2] / - twl4030->sysclk) + 1); + twl4030_wait_ms(delay); } else { /* Headset ramp-down _not_ according to * the TRM, but in a way that it is working */ hs_pop &= ~TWL4030_RAMP_EN; twl4030_write(codec, TWL4030_REG_HS_POPN_SET, hs_pop); /* Wait ramp delay time + 1, so the VMID can settle */ - mdelay((ramp_base[(hs_pop & TWL4030_RAMP_DELAY) >> 2] / - twl4030->sysclk) + 1); + twl4030_wait_ms(delay); /* Bypass the reg_cache to mute the headset */ twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, hs_gain & (~0x0f), @@ -835,7 +850,7 @@ static int digimic_event(struct snd_soc_dapm_widget *w, struct twl4030_priv *twl4030 = snd_soc_codec_get_drvdata(w->codec);

if (twl4030->digimic_delay) - mdelay(twl4030->digimic_delay); + twl4030_wait_ms(twl4030->digimic_delay); return 0; }