[PATCH 3/3] Input: cyttsp - add default init function
From: Oreste Salerno <hidden>
Date: 2015-12-27 16:26:57
Also in:
lkml
Subsystem:
cyttsp touchscreen driver, input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Linus Walleij, Dmitry Torokhov, Linus Torvalds
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 <redacted> --- 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;
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1.9.1