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Input: cyttsp - perform hard reset of the chip during probe

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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>
This commit is contained in:
Oreste Salerno 2016-01-27 13:58:38 -08:00 committed by Dmitry Torokhov
parent 707b61bba8
commit 8fb81d2001
1 changed files with 12 additions and 0 deletions
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12
drivers/input/touchscreen/cyttsp_core.c
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@ -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);