ASoC: Use explicit sequence for WM8903 bias off

This makes no real difference compared to the write sequencer sequence
that was previously used but can run without a clock being provided.
Also remove the write sequencer support code as this was the last use
of it.

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

1 files changed, 21 insertions, 45 deletions

diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c
index e203a3ec655a..c7b52a04fe1a 100644
--- a/sound/soc/codecs/wm8903.c
+++ b/sound/soc/codecs/wm8903.c
@@ -229,8 +229,6 @@ struct wm8903_priv {
         /* Reference count */
         int class_w_users;
 
-        struct completion wseq;
-
         struct snd_soc_jack *mic_jack;
         int mic_det;
         int mic_short;
@@ -262,41 +260,6 @@ static int wm8903_volatile_register(struct snd_soc_codec *codec, unsigned int re
         }
 }
 
-static int wm8903_run_sequence(struct snd_soc_codec *codec, unsigned int start)
-{
-        u16 reg[5];
-        struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec);
-
-        BUG_ON(start > 48);
-
-        /* Enable the sequencer if it's not already on */
-        reg[0] = snd_soc_read(codec, WM8903_WRITE_SEQUENCER_0);
-        snd_soc_write(codec, WM8903_WRITE_SEQUENCER_0,
-                      reg[0] | WM8903_WSEQ_ENA);
-
-        dev_dbg(codec->dev, "Starting sequence at %d\n", start);
-
-        snd_soc_write(codec, WM8903_WRITE_SEQUENCER_3,
-                     start | WM8903_WSEQ_START);
-
-        /* Wait for it to complete.  If we have the interrupt wired up then
-         * that will break us out of the poll early.
-         */
-        do {
-                wait_for_completion_timeout(&wm8903->wseq,
-                                            msecs_to_jiffies(10));
-
-                reg[4] = snd_soc_read(codec, WM8903_WRITE_SEQUENCER_4);
-        } while (reg[4] & WM8903_WSEQ_BUSY);
-
-        dev_dbg(codec->dev, "Sequence complete\n");
-
-        /* Disable the sequencer again if we enabled it */
-        snd_soc_write(codec, WM8903_WRITE_SEQUENCER_0, reg[0]);
-
-        return 0;
-}
-
 static void wm8903_reset(struct snd_soc_codec *codec)
 {
         snd_soc_write(codec, WM8903_SW_RESET_AND_ID, 0);
@@ -1213,11 +1176,26 @@ static int wm8903_set_bias_level(struct snd_soc_codec *codec,
                 break;
 
         case SND_SOC_BIAS_OFF:
-                snd_soc_update_bits(codec, WM8903_CLOCK_RATES_2,
-                                    WM8903_CLK_SYS_ENA, WM8903_CLK_SYS_ENA);
-                wm8903_run_sequence(codec, 32);
-                snd_soc_update_bits(codec, WM8903_CLOCK_RATES_2,
-                                    WM8903_CLK_SYS_ENA, 0);
+                snd_soc_update_bits(codec, WM8903_BIAS_CONTROL_0,
+                                    WM8903_BIAS_ENA, 0);
+
+                snd_soc_update_bits(codec, WM8903_VMID_CONTROL_0,
+                                    WM8903_VMID_SOFT_MASK,
+                                    2 << WM8903_VMID_SOFT_SHIFT);
+
+                snd_soc_update_bits(codec, WM8903_VMID_CONTROL_0,
+                                    WM8903_VMID_BUF_ENA, 0);
+
+                msleep(290);
+
+                snd_soc_update_bits(codec, WM8903_VMID_CONTROL_0,
+                                    WM8903_VMID_TIE_ENA | WM8903_BUFIO_ENA |
+                                    WM8903_VMID_IO_ENA | WM8903_VMID_RES_MASK |
+                                    WM8903_VMID_SOFT_MASK |
+                                    WM8903_VMID_BUF_ENA, 0);
+
+                snd_soc_update_bits(codec, WM8903_BIAS_CONTROL_0,
+                                    WM8903_STARTUP_BIAS_ENA, 0);
                 break;
         }
 
@@ -1670,8 +1648,7 @@ static irqreturn_t wm8903_irq(int irq, void *data)
         int_val = snd_soc_read(codec, WM8903_INTERRUPT_STATUS_1) & mask;
 
         if (int_val & WM8903_WSEQ_BUSY_EINT) {
-                dev_dbg(codec->dev, "Write sequencer done\n");
-                complete(&wm8903->wseq);
+                dev_warn(codec->dev, "Write sequencer done\n");
         }
 
         /*
@@ -1918,7 +1895,6 @@ static int wm8903_probe(struct snd_soc_codec *codec)
         u16 val;
 
         wm8903->codec = codec;
-        init_completion(&wm8903->wseq);
 
         ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_I2C);
         if (ret != 0) {