When using device trees, it's not possible to assign an init()
function in the platform data.
In case the init function has not been assigned, attempt to
perform a hard reset of the chip, using reset gpio defined in the
platform data / device tree.
Signed-off-by: Oreste Salerno <oreste.salerno@xxxxxxxxxx>
---
drivers/input/touchscreen/cyttsp_core.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
index 54f6e51..e2589d3 100644
--- a/drivers/input/touchscreen/cyttsp_core.c
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -238,6 +238,16 @@ static int cyttsp_set_sysinfo_regs(struct cyttsp *ts)
return retval;
}
+static void cyttsp_hard_reset(struct cyttsp *ts)
+{
+ if (ts->pdata->reset_gpio) {
+ gpiod_set_value_cansleep(ts->pdata->reset_gpio, 1);
+ msleep(CY_DELAY_DFLT);
+ gpiod_set_value_cansleep(ts->pdata->reset_gpio, 0);
+ msleep(CY_DELAY_DFLT);
+ }
+}
+
static int cyttsp_soft_reset(struct cyttsp *ts)
{
unsigned long timeout;
@@ -659,6 +669,8 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
error);
goto err_free_mem;
}
+ } else {
+ cyttsp_hard_reset(ts);
}
input_dev->name = pdata->name;
--
1.9.1
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