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| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-11-27 10:10:40 -0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-11-27 10:10:40 -0200 |
| commit | 3a1f2e4b150aba36c07a25ec58986cf12469ba94 (patch) | |
| tree | 8456d7e6052e694d014530ead1d29e1e8b912845 /linux/drivers/media/video/em28xx/em28xx-core.c | |
| parent | a1e782e39b16be26c0d2a5a18f29cc85251d2cb1 (diff) | |
| download | mediapointer-dvb-s2-3a1f2e4b150aba36c07a25ec58986cf12469ba94.tar.gz mediapointer-dvb-s2-3a1f2e4b150aba36c07a25ec58986cf12469ba94.tar.bz2 | |
em28xx: Add support for suspend the device when not used
From: Mauro Carvalho Chehab <mchehab@redhat.com>
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.
Priority: normal
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'linux/drivers/media/video/em28xx/em28xx-core.c')
| -rw-r--r-- | linux/drivers/media/video/em28xx/em28xx-core.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/linux/drivers/media/video/em28xx/em28xx-core.c b/linux/drivers/media/video/em28xx/em28xx-core.c index 729120807..f62b05eae 100644 --- a/linux/drivers/media/video/em28xx/em28xx-core.c +++ b/linux/drivers/media/video/em28xx/em28xx-core.c @@ -741,12 +741,14 @@ 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) { @@ -771,14 +773,17 @@ 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); } #if 0 /* Resource is locked */ - if (dev->mode != EM28XX_MODE_UNDEFINED) + if (dev->mode != EM28XX_SUSPEND) return -EINVAL; #endif dev->mode = set_mode; |