ASoC: TWL4030: Use usleep_range when appropriate

Change the busy loop delays with usleep_range or msleep calls.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c
index cbebec6..a6ceddb 100644 (file)
--- 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;
 }