diff options
| author | Andreas Regel <andreas.regel@gmx.de> | 2010-01-05 19:22:45 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-02-26 15:10:36 -0300 |
| commit | 0c3f9fd807d9ef842fcc7e47e447ed2c68d63e49 (patch) | |
| tree | 3ad1ed4d7eddf1c9a4ebdd849307f2908c296d12 /drivers/media | |
| parent | f91e59cb5e6add13d4e45c5cc8d45a614e1dc8e4 (diff) | |
V4L/DVB (13980): [STV6110x] Added function stv6110x_write_regs
The function stv6110x_write_regs is used to write several registers at once.
Signed-off-by: Andreas Regel <andreas.regel@gmx.de>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/dvb/frontends/stv6110x.c | 34 |
1 files changed, 24 insertions, 10 deletions
diff --git a/drivers/media/dvb/frontends/stv6110x.c b/drivers/media/dvb/frontends/stv6110x.c index bcfcb652464..09e3aef8073 100644 --- a/drivers/media/dvb/frontends/stv6110x.c +++ b/drivers/media/dvb/frontends/stv6110x.c @@ -58,12 +58,23 @@ static int stv6110x_read_reg(struct stv6110x_state *stv6110x, u8 reg, u8 *data) return 0; } -static int stv6110x_write_reg(struct stv6110x_state *stv6110x, u8 reg, u8 data) +static int stv6110x_write_regs(struct stv6110x_state *stv6110x, int start, u8 data[], int len) { int ret; const struct stv6110x_config *config = stv6110x->config; - u8 buf[] = { reg, data }; - struct i2c_msg msg = { .addr = config->addr, .flags = 0, . buf = buf, .len = 2 }; + u8 buf[len + 1]; + struct i2c_msg msg = { + .addr = config->addr, + .flags = 0, + .buf = buf, + .len = len + 1 + }; + + if (start + len > 8) + return -EINVAL; + + buf[0] = start; + memcpy(&buf[1], data, len); ret = i2c_transfer(stv6110x->i2c, &msg, 1); if (ret != 1) { @@ -74,18 +85,21 @@ static int stv6110x_write_reg(struct stv6110x_state *stv6110x, u8 reg, u8 data) return 0; } +static int stv6110x_write_reg(struct stv6110x_state *stv6110x, u8 reg, u8 data) +{ + return stv6110x_write_regs(stv6110x, reg, &data, 1); +} + static int stv6110x_init(struct dvb_frontend *fe) { struct stv6110x_state *stv6110x = fe->tuner_priv; int ret; - u8 i; - for (i = 0; i < ARRAY_SIZE(stv6110x_regs); i++) { - ret = stv6110x_write_reg(stv6110x, i, stv6110x_regs[i]); - if (ret < 0) { - dprintk(FE_ERROR, 1, "Initialization failed"); - return -1; - } + ret = stv6110x_write_regs(stv6110x, 0, stv6110x_regs, + ARRAY_SIZE(stv6110x_regs)); + if (ret < 0) { + dprintk(FE_ERROR, 1, "Initialization failed"); + return -1; } return 0; |