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| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-11-27 09:10:40 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-12-29 17:53:43 -0200 |
| commit | 2fe3e2ee72ef17daad1d3769321bb7dd69a003a9 (patch) | |
| tree | 1d2e7a225417759a5ad55408d76416af5e7e6eb8 /drivers/media/video/em28xx/em28xx-core.c | |
| parent | f502e861849ade3a128964410c87acedf437a6a1 (diff) | |
| download | kernel_samsung_smdk4412-2fe3e2ee72ef17daad1d3769321bb7dd69a003a9.zip kernel_samsung_smdk4412-2fe3e2ee72ef17daad1d3769321bb7dd69a003a9.tar.gz kernel_samsung_smdk4412-2fe3e2ee72ef17daad1d3769321bb7dd69a003a9.tar.bz2 | |
V4L/DVB (9764): em28xx: Add support for suspend the device when not used
Several chips may be turned off when the device is not used, like audio,
video and dvb demods. This patch adds a gpio callback at the core
structs to allow turning off such devices.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-core.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-core.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/drivers/media/video/em28xx/em28xx-core.c b/drivers/media/video/em28xx/em28xx-core.c index 71a1aaa..c3ff8ad 100644 --- a/drivers/media/video/em28xx/em28xx-core.c +++ b/drivers/media/video/em28xx/em28xx-core.c @@ -737,12 +737,14 @@ int em28xx_gpio_set(struct em28xx *dev, struct em28xx_reg_seq *gpio) if (!gpio) return rc; - em28xx_write_reg(dev, 0x48, 0x00); - if (dev->mode == EM28XX_ANALOG_MODE) - em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x67); - else - em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x37); - msleep(6); + if (dev->mode != EM28XX_SUSPEND) { + em28xx_write_reg(dev, 0x48, 0x00); + if (dev->mode == EM28XX_ANALOG_MODE) + em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x67); + else + em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x37); + msleep(6); + } /* Send GPIO reset sequences specified at board entry */ while (gpio->sleep >= 0) { @@ -767,9 +769,12 @@ int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode) if (dev->mode == set_mode) return 0; - if (set_mode == EM28XX_MODE_UNDEFINED) { + if (set_mode == EM28XX_SUSPEND) { dev->mode = set_mode; - return 0; + + /* FIXME: add suspend support for ac97 */ + + return em28xx_gpio_set(dev, dev->board.suspend_gpio); } dev->mode = set_mode; |