From: Oreste Salerno Date: Wed, 27 Jan 2016 21:58:38 +0000 (-0800) Subject: Input: cyttsp - perform hard reset of the chip during probe X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8fb81d20019db3dea4126e3eac7ef8dc89b10b9e;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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 Signed-off-by: Dmitry Torokhov --- 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);