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iio: adc: adc12138: make array ch_to_mux static, makes object code smaller

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Don't populate const array ch_to_mux on the stack, instead
make it static. Makes the object code smaller by over 200 bytes:

Before:
   text	   data	    bss	    dec	    hex	filename
  12663	   1648	    128	  14439	   3867	drivers/iio/adc/ti-adc12138.o

After
   text	   data	    bss	    dec	    hex	filename
  12353	   1744	    128	  14225	   3791	drivers/iio/adc/ti-adc12138.o

(gcc version 7.2.0 x86_64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Colin Ian King 2017-10-19 15:46:22 +02:00 committed by Jonathan Cameron
parent f66f18e99a
commit 59dba8facb
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/adc/ti-adc12138.c
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@ -164,7 +164,7 @@ static int __adc12138_start_conv(struct adc12138 *adc,
void *data, int len)
{
const u8 ch_to_mux[] = { 0, 4, 1, 5, 2, 6, 3, 7 };
static const u8 ch_to_mux[] = { 0, 4, 1, 5, 2, 6, 3, 7 };
u8 mode = (ch_to_mux[channel->channel] << 4) |
(channel->differential ? 0 : 0x80);