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>

1 files changed, 23 insertions, 8 deletions

diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c
index cbebec6ba1ba..a6ceddb0bb7d 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;
 }