diff options
| author | Nicolas Ferre <nicolas.ferre@rfo.atmel.com> | 2007-03-01 05:51:03 +0100 |
|---|---|---|
| committer | Dmitry Torokhov <dtor@insightbb.com> | 2007-03-01 05:51:03 +0100 |
| commit | 969111e900226a8dbd1f596f34c09eecd20afc7d (patch) | |
| tree | 2a9d331f90e8049c5d2fbc0a37a7971bccfe07f1 /drivers/input/touchscreen/ads7846.c | |
| parent | Input: add driver for MIPS Cobalt back panel buttons (diff) | |
| download | linux-969111e900226a8dbd1f596f34c09eecd20afc7d.tar.xz linux-969111e900226a8dbd1f596f34c09eecd20afc7d.zip | |
Input: ads7846 - add support for the ads7843 touchscreen
The ads7843 support has now become almost trivial since the last
rework.
Signed-off-by: Nicolas Ferre <nicolas.ferre@rfo.atmel.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/touchscreen/ads7846.c')
| -rw-r--r-- | drivers/input/touchscreen/ads7846.c | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index 0a26e0663542..2f5fc8043366 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c @@ -39,7 +39,8 @@ /* * This code has been heavily tested on a Nokia 770, and lightly * tested on other ads7846 devices (OSK/Mistral, Lubbock). - * Support for ads7843 and ads7845 has only been stubbed in. + * Support for ads7843 tested on Atmel at91sam926x-EK. + * Support for ads7845 has only been stubbed in. * * IRQ handling needs a workaround because of a shortcoming in handling * edge triggered IRQs on some platforms like the OMAP1/2. These @@ -246,18 +247,16 @@ static int ads7846_read12_ser(struct device *dev, unsigned command) /* REVISIT: take a few more samples, and compare ... */ - /* maybe off internal vREF */ - if (use_internal) { - req->ref_off = REF_OFF; - req->xfer[4].tx_buf = &req->ref_off; - req->xfer[4].len = 1; - spi_message_add_tail(&req->xfer[4], &req->msg); - - req->xfer[5].rx_buf = &req->scratch; - req->xfer[5].len = 2; - CS_CHANGE(req->xfer[5]); - spi_message_add_tail(&req->xfer[5], &req->msg); - } + /* converter in low power mode & enable PENIRQ */ + req->ref_off = PWRDOWN; + req->xfer[4].tx_buf = &req->ref_off; + req->xfer[4].len = 1; + spi_message_add_tail(&req->xfer[4], &req->msg); + + req->xfer[5].rx_buf = &req->scratch; + req->xfer[5].len = 2; + CS_CHANGE(req->xfer[5]); + spi_message_add_tail(&req->xfer[5], &req->msg); ts->irq_disabled = 1; disable_irq(spi->irq); @@ -536,6 +535,9 @@ static void ads7846_rx(void *ads) } else Rt = 0; + if (ts->model == 7843) + Rt = ts->pressure_max / 2; + /* Sample found inconsistent by debouncing or pressure is beyond * the maximum. Don't report it to user space, repeat at least * once more the measurement |