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V4L/DVB (9657): em28xx: add a functio to write on a single register

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Introduce a new function that writes to a single register.  This is
useful because the vast majority of register writes are a single
register, and this format permits or'ing register value bits together.

Signed-off-by: Devin Heitmueller <devin.heitmueller@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Devin Heitmueller 2008-11-20 09:52:20 -03:00 committed by Mauro Carvalho Chehab
parent f8de18d430
commit b697248994
2 changed files with 8 additions and 0 deletions
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6
drivers/media/video/em28xx/em28xx-core.c
View File

@ -196,6 +196,12 @@ int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len)
return rc; return rc;
} }
/* Write a single register */
int em28xx_write_reg(struct em28xx *dev, u16 reg, u8 val)
{
return em28xx_write_regs(dev, reg, &val, 1);
}
/* /*
* em28xx_write_reg_bits() * em28xx_write_reg_bits()
* sets only some bits (specified by bitmask) of a register, by first reading * sets only some bits (specified by bitmask) of a register, by first reading

2
drivers/media/video/em28xx/em28xx.h
View File

@ -555,6 +555,8 @@ int em28xx_read_reg(struct em28xx *dev, u16 reg);
int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf, int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
int len); int len);
int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len); int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len);
int em28xx_write_reg(struct em28xx *dev, u16 reg, u8 val);
int em28xx_audio_analog_set(struct em28xx *dev); int em28xx_audio_analog_set(struct em28xx *dev);
int em28xx_audio_setup(struct em28xx *dev); int em28xx_audio_setup(struct em28xx *dev);