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| author | Oreste Salerno <oreste.salerno@tomtom.com> | 2016-01-27 22:58:38 +0100 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2016-01-27 23:32:49 +0100 |
| commit | 8fb81d20019db3dea4126e3eac7ef8dc89b10b9e (patch) | |
| tree | 3683206d6373795fa392dfd11fc13d37473b5bc4 /drivers/input/touchscreen | |
| parent | Input: cyttsp - switch to using device properties (diff) | |
| download | linux-8fb81d20019db3dea4126e3eac7ef8dc89b10b9e.tar.xz linux-8fb81d20019db3dea4126e3eac7ef8dc89b10b9e.zip | |
Input: cyttsp - perform hard reset of the chip during probe
Since we removed support for calling an init() callback from
the platform data, introduce a function which initializes
the chip by performing a hard reset, using the reset gpio
defined in the device properties.
Signed-off-by: Oreste Salerno <oreste.salerno@tomtom.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/touchscreen')
| -rw-r--r-- | drivers/input/touchscreen/cyttsp_core.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c index 8814b6c87097..91cda8f8119d 100644 --- a/drivers/input/touchscreen/cyttsp_core.c +++ b/drivers/input/touchscreen/cyttsp_core.c @@ -240,6 +240,16 @@ static int cyttsp_set_sysinfo_regs(struct cyttsp *ts) return retval; } +static void cyttsp_hard_reset(struct cyttsp *ts) +{ + if (ts->reset_gpio) { + gpiod_set_value_cansleep(ts->reset_gpio, 1); + msleep(CY_DELAY_DFLT); + gpiod_set_value_cansleep(ts->reset_gpio, 0); + msleep(CY_DELAY_DFLT); + } +} + static int cyttsp_soft_reset(struct cyttsp *ts) { unsigned long timeout; @@ -666,6 +676,8 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops, disable_irq(ts->irq); + cyttsp_hard_reset(ts); + error = cyttsp_power_on(ts); if (error) return ERR_PTR(error); |