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| author | NeilBrown <neilb@suse.de> | 2013-02-15 12:44:02 +1100 |
|---|---|---|
| committer | Denis 'GNUtoo' Carikli <GNUtoo@no-log.org> | 2013-07-21 00:12:03 +0200 |
| commit | fb8f7dcb076c73022c345a7e7c1d22f183b55255 (patch) | |
| tree | a5afad0d67288804d9de5ac271bd0f1325d88a9e | |
| parent | 81c7e952105b27b25708e5734ff55cc96da6aef0 (diff) | |
| download | kernel_goldelico_gta04-fb8f7dcb076c73022c345a7e7c1d22f183b55255.zip kernel_goldelico_gta04-fb8f7dcb076c73022c345a7e7c1d22f183b55255.tar.gz kernel_goldelico_gta04-fb8f7dcb076c73022c345a7e7c1d22f183b55255.tar.bz2 | |
tsc2007 fixes.
pressures is being reported inverted - fix that
Signed-off-by: NeilBrown <neilb@suse.de>
| -rw-r--r-- | drivers/input/touchscreen/tsc2007.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c index 0b67ba4..4ae2fb6 100644 --- a/drivers/input/touchscreen/tsc2007.c +++ b/drivers/input/touchscreen/tsc2007.c @@ -130,13 +130,17 @@ static u32 tsc2007_calculate_pressure(struct tsc2007 *tsc, struct ts_event *tc) if (tc->x == MAX_12BIT) tc->x = 0; - if (likely(tc->x && tc->z1)) { + if (likely(tc->x && tc->z1 && tc->z2 > tc->z1)) { /* compute touch pressure resistance using equation #1 */ rt = tc->z2 - tc->z1; rt *= tc->x; +#if 0 rt *= tsc->x_plate_ohms; rt /= tc->z1; rt = (rt + 2047) >> 12; +#else + rt = (tc->z1 << (32-12)) / rt * 2048 / tsc->x_plate_ohms; +#endif } return rt; |