ALSA: ice1712: Use bitrev8

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

2 files changed, 3 insertions, 13 deletions

diff --git a/sound/i2c/cs8427.c b/sound/i2c/cs8427.c
index 020a5d512472..04ae8704cdcd 100644
--- a/sound/i2c/cs8427.c
+++ b/sound/i2c/cs8427.c
@@ -23,6 +23,7 @@
 #include <linux/slab.h>
 #include <linux/delay.h>
 #include <linux/init.h>
+#include <linux/bitrev.h>
 #include <asm/unaligned.h>
 #include <sound/core.h>
 #include <sound/control.h>
@@ -55,18 +56,6 @@ struct cs8427 {
         struct cs8427_stream capture;
 };
 
-static unsigned char swapbits(unsigned char val)
-{
-        int bit;
-        unsigned char res = 0;
-        for (bit = 0; bit < 8; bit++) {
-                res <<= 1;
-                res |= val & 1;
-                val >>= 1;
-        }
-        return res;
-}
-
 int snd_cs8427_reg_write(struct snd_i2c_device *device, unsigned char reg,
                          unsigned char val)
 {
@@ -149,7 +138,7 @@ static int snd_cs8427_send_corudata(struct snd_i2c_device *device,
         }
         data[0] = CS8427_REG_AUTOINC | CS8427_REG_CORU_DATABUF;
         for (idx = 0; idx < count; idx++)
-                data[idx + 1] = swapbits(ndata[idx]);
+                data[idx + 1] = bitrev8(ndata[idx]);
         if (snd_i2c_sendbytes(device, data, count + 1) != count + 1)
                 return -EIO;
         return 1;
diff --git a/sound/pci/Kconfig b/sound/pci/Kconfig
index 75c602b5b132..351654cf7b09 100644
--- a/sound/pci/Kconfig
+++ b/sound/pci/Kconfig
@@ -570,6 +570,7 @@ config SND_ICE1712
         tristate "ICEnsemble ICE1712 (Envy24)"
         select SND_MPU401_UART
         select SND_AC97_CODEC
+        select BITREVERSE
         help
           Say Y here to include support for soundcards based on the
           ICE1712 (Envy24) chip.