diff options
| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-07-05 17:16:26 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-07-05 17:16:26 +0200 |
| commit | 298f18a3e2e078c796d3f852091fbe961fbca806 (patch) | |
| tree | 5edf68c7efcc8aca6984a93272f6517450fd501c /drivers/media | |
| parent | [media] RTL2832 DVB-T demodulator driver (diff) | |
| download | linux-298f18a3e2e078c796d3f852091fbe961fbca806.tar.xz linux-298f18a3e2e078c796d3f852091fbe961fbca806.zip | |
[media] rtl2832: save some data space by using a macro instead of a table
Instead of using a table for reg bitmask, use a macro. This should save
some data segment space.
Cc: Thomas Mair <thomas.mair86@googlemail.com>
Cc: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/dvb/frontends/rtl2832.c | 42 |
1 files changed, 4 insertions, 38 deletions
diff --git a/drivers/media/dvb/frontends/rtl2832.c b/drivers/media/dvb/frontends/rtl2832.c index d0cbe27f979e..2da592fb38ad 100644 --- a/drivers/media/dvb/frontends/rtl2832.c +++ b/drivers/media/dvb/frontends/rtl2832.c @@ -19,47 +19,13 @@ */ #include "rtl2832_priv.h" - +#include <linux/bitops.h> int rtl2832_debug; module_param_named(debug, rtl2832_debug, int, 0644); MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); - -static const int reg_mask[32] = { - 0x00000001, - 0x00000003, - 0x00000007, - 0x0000000f, - 0x0000001f, - 0x0000003f, - 0x0000007f, - 0x000000ff, - 0x000001ff, - 0x000003ff, - 0x000007ff, - 0x00000fff, - 0x00001fff, - 0x00003fff, - 0x00007fff, - 0x0000ffff, - 0x0001ffff, - 0x0003ffff, - 0x0007ffff, - 0x000fffff, - 0x001fffff, - 0x003fffff, - 0x007fffff, - 0x00ffffff, - 0x01ffffff, - 0x03ffffff, - 0x07ffffff, - 0x0fffffff, - 0x1fffffff, - 0x3fffffff, - 0x7fffffff, - 0xffffffff -}; +#define REG_MASK(b) (BIT(b + 1) - 1) static const struct rtl2832_reg_entry registers[] = { [DVBT_SOFT_RST] = {0x1, 0x1, 2, 2}, @@ -317,7 +283,7 @@ int rtl2832_rd_demod_reg(struct rtl2832_priv *priv, int reg, u32 *val) page = registers[reg].page; len = (msb >> 3) + 1; - mask = reg_mask[msb - lsb]; + mask = REG_MASK(msb - lsb); ret = rtl2832_rd_regs(priv, reg_start_addr, page, &reading[0], len); if (ret) @@ -359,7 +325,7 @@ int rtl2832_wr_demod_reg(struct rtl2832_priv *priv, int reg, u32 val) page = registers[reg].page; len = (msb >> 3) + 1; - mask = reg_mask[msb - lsb]; + mask = REG_MASK(msb - lsb); ret = rtl2832_rd_regs(priv, reg_start_addr, page, &reading[0], len); |