From: Axel Lin <axel.lin@ingics.com>
To: Mark Brown <broonie@kernel.org>
Cc: "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>,
"patches@opensource.wolfsonmicro.com"
<patches@opensource.wolfsonmicro.com>,
Charles Keepax <ckeepax@opensource.wolfsonmicro.com>,
Liam Girdwood <lgirdwood@gmail.com>
Subject: [PATCH RFT] ASoC: wm8737: Fixup setting VMID Impedance control register
Date: Sun, 10 May 2015 11:35:06 +0800 [thread overview]
Message-ID: <1431228906.9088.2.camel@ingics.com> (raw)
According to the datasheet:
R10 (0Ah) VMID Impedance Control
BIT 3:2 VMIDSEL DEFAULT 00
DESCRIPTION: VMID impedance selection control
00: 75kΩ output
01: 300kΩ output
10: 2.5kΩ output
WM8737_VMIDSEL_MASK is 0xC (VMIDSEL - [3:2]),
so it needs to left shift WM8737_VMIDSEL_SHIFT bits for setting these bits.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
---
sound/soc/codecs/wm8737.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/sound/soc/codecs/wm8737.c b/sound/soc/codecs/wm8737.c
index 4a9407d..d38f1a9 100644
--- a/sound/soc/codecs/wm8737.c
+++ b/sound/soc/codecs/wm8737.c
@@ -483,7 +483,8 @@ static int wm8737_set_bias_level(struct snd_soc_codec *codec,
/* Fast VMID ramp at 2*2.5k */
snd_soc_update_bits(codec, WM8737_MISC_BIAS_CONTROL,
- WM8737_VMIDSEL_MASK, 0x4);
+ WM8737_VMIDSEL_MASK,
+ 2 << WM8737_VMIDSEL_SHIFT);
/* Bring VMID up */
snd_soc_update_bits(codec, WM8737_POWER_MANAGEMENT,
@@ -497,7 +498,8 @@ static int wm8737_set_bias_level(struct snd_soc_codec *codec,
/* VMID at 2*300k */
snd_soc_update_bits(codec, WM8737_MISC_BIAS_CONTROL,
- WM8737_VMIDSEL_MASK, 2);
+ WM8737_VMIDSEL_MASK,
+ 1 << WM8737_VMIDSEL_SHIFT);
break;
--
2.1.0
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next reply other threads:[~2015-05-10 3:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-10 3:35 Axel Lin [this message]
2015-05-13 11:49 ` [PATCH RFT] ASoC: wm8737: Fixup setting VMID Impedance control register Mark Brown
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