diff options
| author | zhong jiang <zhongjiang@huawei.com> | 2019-10-09 16:55:22 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-10-16 16:47:14 +0200 |
| commit | 727fe909af7545fc317cd1ead4678724ec87df0a (patch) | |
| tree | 72a55a095423517a226e2f3d3d8b4ab147e01b90 /drivers/media/dvb-frontends | |
| parent | media: imon_raw: simplify loop (diff) | |
| download | linux-727fe909af7545fc317cd1ead4678724ec87df0a.tar.xz linux-727fe909af7545fc317cd1ead4678724ec87df0a.zip | |
media: dvb-frontends: Use DIV_ROUND_CLOSEST directly to make it readable
The kernel.h macro DIV_ROUND_CLOSEST performs the computation (x + d/2)/d
but is perhaps more readable.
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media/dvb-frontends')
| -rw-r--r-- | drivers/media/dvb-frontends/mt312.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/drivers/media/dvb-frontends/mt312.c b/drivers/media/dvb-frontends/mt312.c index 7cae7d632030..d43a67045dbe 100644 --- a/drivers/media/dvb-frontends/mt312.c +++ b/drivers/media/dvb-frontends/mt312.c @@ -135,11 +135,6 @@ static inline int mt312_writereg(struct mt312_state *state, return mt312_write(state, reg, &tmp, 1); } -static inline u32 mt312_div(u32 a, u32 b) -{ - return (a + (b / 2)) / b; -} - static int mt312_reset(struct mt312_state *state, const u8 full) { return mt312_writereg(state, RESET, full ? 0x80 : 0x40); @@ -187,7 +182,7 @@ static int mt312_get_symbol_rate(struct mt312_state *state, u32 *sr) monitor = (buf[0] << 8) | buf[1]; dprintk("sr(auto) = %u\n", - mt312_div(monitor * 15625, 4)); + DIV_ROUND_CLOSEST(monitor * 15625, 4)); } else { ret = mt312_writereg(state, MON_CTRL, 0x05); if (ret < 0) @@ -291,10 +286,10 @@ static int mt312_initfe(struct dvb_frontend *fe) } /* SYS_CLK */ - buf[0] = mt312_div(state->xtal * state->freq_mult * 2, 1000000); + buf[0] = DIV_ROUND_CLOSEST(state->xtal * state->freq_mult * 2, 1000000); /* DISEQC_RATIO */ - buf[1] = mt312_div(state->xtal, 22000 * 4); + buf[1] = DIV_ROUND_CLOSEST(state->xtal, 22000 * 4); ret = mt312_write(state, SYS_CLK, buf, sizeof(buf)); if (ret < 0) @@ -610,7 +605,7 @@ static int mt312_set_frontend(struct dvb_frontend *fe) } /* sr = (u16)(sr * 256.0 / 1000000.0) */ - sr = mt312_div(p->symbol_rate * 4, 15625); + sr = DIV_ROUND_CLOSEST(p->symbol_rate * 4, 15625); /* SYM_RATE */ buf[0] = (sr >> 8) & 0x3f; |