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V4L/DVB (13980): [STV6110x] Added function stv6110x_write_regs

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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>
This commit is contained in:
Andreas Regel 2010-01-05 19:22:45 -03:00 committed by Mauro Carvalho Chehab
parent f91e59cb5e
commit 0c3f9fd807
1 changed files with 24 additions and 10 deletions
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34
drivers/media/dvb/frontends/stv6110x.c
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@ -58,12 +58,23 @@ static int stv6110x_read_reg(struct stv6110x_state *stv6110x, u8 reg, u8 *data)
return 0; 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; int ret;
const struct stv6110x_config *config = stv6110x->config; const struct stv6110x_config *config = stv6110x->config;
u8 buf[] = { reg, data }; u8 buf[len + 1];
struct i2c_msg msg = { .addr = config->addr, .flags = 0, . buf = buf, .len = 2 }; 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); ret = i2c_transfer(stv6110x->i2c, &msg, 1);
if (ret != 1) { if (ret != 1) {
@ -74,18 +85,21 @@ static int stv6110x_write_reg(struct stv6110x_state *stv6110x, u8 reg, u8 data)
return 0; 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) static int stv6110x_init(struct dvb_frontend *fe)
{ {
struct stv6110x_state *stv6110x = fe->tuner_priv; struct stv6110x_state *stv6110x = fe->tuner_priv;
int ret; int ret;
u8 i;
for (i = 0; i < ARRAY_SIZE(stv6110x_regs); i++) { ret = stv6110x_write_regs(stv6110x, 0, stv6110x_regs,
ret = stv6110x_write_reg(stv6110x, i, stv6110x_regs[i]); ARRAY_SIZE(stv6110x_regs));
if (ret < 0) { if (ret < 0) {
dprintk(FE_ERROR, 1, "Initialization failed"); dprintk(FE_ERROR, 1, "Initialization failed");
return -1; return -1;
}
} }
return 0; return 0;