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[media] ddbridge: add i2c_read_regs() 

Adds new i2c_read_regs() function and make i2c_read_reg() wrap into this
with len=1. Required for the tuner_tda18212_ping() and XO2 handling
functions (part of the Sony CXD28xx support patch series).

Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Daniel Scheller 2017-03-29 13:43:12 -03:00 committed by Mauro Carvalho Chehab
parent dbbac11e1d
commit 6b1256b7be
1 changed files with 8 additions and 2 deletions
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10
drivers/media/pci/ddbridge/ddbridge-core.c
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@ -54,15 +54,21 @@ static int i2c_read(struct i2c_adapter *adapter, u8 adr, u8 *val)
return (i2c_transfer(adapter, msgs, 1) == 1) ? 0 : -1;
}
static int i2c_read_reg(struct i2c_adapter *adapter, u8 adr, u8 reg, u8 *val)
static int i2c_read_regs(struct i2c_adapter *adapter,
u8 adr, u8 reg, u8 *val, u8 len)
{
struct i2c_msg msgs[2] = {{.addr = adr, .flags = 0,
.buf = &reg, .len = 1 },
{.addr = adr, .flags = I2C_M_RD,
.buf = val, .len = 1 } };
.buf = val, .len = len } };
return (i2c_transfer(adapter, msgs, 2) == 2) ? 0 : -1;
}
static int i2c_read_reg(struct i2c_adapter *adapter, u8 adr, u8 reg, u8 *val)
{
return i2c_read_regs(adapter, adr, reg, val, 1);
}
static int i2c_read_reg16(struct i2c_adapter *adapter, u8 adr,
u16 reg, u8 *val)
{