diff options
| author | Andy Green <andy@openmoko.com> | 2008-11-19 17:09:58 +0000 |
|---|---|---|
| committer | Andy Green <agreen@pads.home.warmcat.com> | 2008-11-19 17:09:58 +0000 |
| commit | cb559a9ddbd67883ec2e328ed69f9ad68768b4de (patch) | |
| tree | a450747f6af28941c8419563566ab76738eb6bf9 /include | |
| parent | 3965859d32cbe5e29c1f99b417feeb9e6d02f7d8 (diff) | |
add-glamo-mci-slower-clocking-dynamic-switching.patch
This patch gives glamo-mci a concept of a platform-defined
dynamic clock slowing callback. It means that platform code
can associate some completely external state to decide if
we run the SD clock at normal rate or a rate divided by a
module parameter "sd_slow_ratio", which you can set on
kernel commandline like this:
glamo_mci.sd_slow_ratio=8
you can also change it at runtime by
echo 8 > /sys/module/glamo_mci/parameters/sd_slow_ratio
If no platform callback is defined, then no slow mode
is used. If it is defined, then the default division
action is / 8, eg, 16MHz normal -> 2MHz slow mode.
Signed-off-by: Andy Green <andy@openmoko.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/glamofb.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/glamofb.h b/include/linux/glamofb.h index bb1a398adf7..ca63355d43b 100644 --- a/include/linux/glamofb.h +++ b/include/linux/glamofb.h @@ -31,6 +31,8 @@ struct glamofb_platform_data { /* glamo mmc platform specific info */ void (*glamo_set_mci_power)(unsigned char power_mode, unsigned short vdd); + /* glamo-mci asking if it should use the slow clock to card */ + int (*glamo_mci_use_slow)(void); int (*glamo_irq_is_wired)(void); void (*mci_suspending)(struct platform_device *dev); int (*mci_all_dependencies_resumed)(struct platform_device *dev); |