diff options
| author | Andy Green <andy@openmoko.com> | 2008-11-19 17:09:34 +0000 |
|---|---|---|
| committer | Andy Green <agreen@pads.home.warmcat.com> | 2008-11-19 17:09:34 +0000 |
| commit | 6b5297122074ac393720b826fb534a2a4ad25772 (patch) | |
| tree | 8a069dbf63d6001201db542d882eb3078cc713d9 /arch/arm/mach-s3c2440 | |
| parent | cd399d1273d3e3a3a3827ec70eaf23eacae61d74 (diff) | |
fix-lis302dl-suspend-gpio.patch
Add platform stuff to deal with going in and out of suspend
so the motion sensor IO is not driving high into unpowered sensors
Signed-off-by: Andy Green <andy@openmoko.com>
Diffstat (limited to 'arch/arm/mach-s3c2440')
| -rw-r--r-- | arch/arm/mach-s3c2440/mach-gta02.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c index 5bd68a69f49..99206eee663 100644 --- a/arch/arm/mach-s3c2440/mach-gta02.c +++ b/arch/arm/mach-s3c2440/mach-gta02.c @@ -887,7 +887,31 @@ void gat02_lis302dl_bitbang_read(struct lis302dl_info *lis) } -struct lis302dl_platform_data lis302_pdata[] = { +void gat02_lis302dl_suspend_io(struct lis302dl_info *lis, int resume) +{ + struct lis302dl_platform_data *pdata = lis->pdata; + + if (!resume) { + /* + * we don't want to power them with a high level + * because GSENSOR_3V3 is not up during suspend + */ + s3c2410_gpio_setpin(pdata->pin_chip_select, 0); + s3c2410_gpio_setpin(pdata->pin_clk, 0); + s3c2410_gpio_setpin(pdata->pin_mosi, 0); + /* misnomer: it is a pullDOWN in 2442 */ + s3c2410_gpio_pullup(pdata->pin_miso, 1); + return; + } + + /* back to normal */ + s3c2410_gpio_setpin(pdata->pin_chip_select, 1); + s3c2410_gpio_setpin(pdata->pin_clk, 1); + /* misnomer: it is a pullDOWN in 2442 */ + s3c2410_gpio_pullup(pdata->pin_miso, 0); +} + +const struct lis302dl_platform_data lis302_pdata[] = { { .name = "lis302-1 (top)", .pin_chip_select= S3C2410_GPD12, @@ -896,6 +920,7 @@ struct lis302dl_platform_data lis302_pdata[] = { .pin_miso = S3C2410_GPG5, .open_drain = 1, /* altered at runtime by PCB rev */ .lis302dl_bitbang_read = gat02_lis302dl_bitbang_read, + .lis302dl_suspend_io = gat02_lis302dl_suspend_io, }, { .name = "lis302-2 (bottom)", .pin_chip_select= S3C2410_GPD13, @@ -904,6 +929,7 @@ struct lis302dl_platform_data lis302_pdata[] = { .pin_miso = S3C2410_GPG5, .open_drain = 1, /* altered at runtime by PCB rev */ .lis302dl_bitbang_read = gat02_lis302dl_bitbang_read, + .lis302dl_suspend_io = gat02_lis302dl_suspend_io, }, }; |