From: Hans de Goede hdegoede@redhat.com
commit e2b74419e5cc7cfc58f3e785849f73f8fa0af5b3 upstream
Suspending Goodix touchscreens requires changing the interrupt pin to output before sending them a power-down command. Followed by wiggling the interrupt pin to wake the device up, after which it is put back in input mode.
On Cherry Trail device the interrupt pin is listed as a GpioInt ACPI resource so we can do this without problems as long as we release the IRQ before changing the pin to output mode.
On Bay Trail devices with a Goodix touchscreen direct-irq mode is used in combination with listing the pin as a normal GpioIo resource. This works fine, but this triggers the WARN in byt_gpio_set_direction-s output path because direct-irq support is enabled on the pin.
This commit replaces the WARN call with a dev_info_once call, fixing a bunch of WARN splats in dmesg on each suspend/resume cycle.
Signed-off-by: Hans de Goede hdegoede@redhat.com Acked-by: Mika Westerberg mika.westerberg@linux.intel.com Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Signed-off-by: Sudip Mukherjee sudipm.mukherjee@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pinctrl/intel/pinctrl-baytrail.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/pinctrl/intel/pinctrl-baytrail.c b/drivers/pinctrl/intel/pinctrl-baytrail.c index acb02a7aa9496..7d6685ae31d70 100644 --- a/drivers/pinctrl/intel/pinctrl-baytrail.c +++ b/drivers/pinctrl/intel/pinctrl-baytrail.c @@ -1026,15 +1026,15 @@ static int byt_gpio_set_direction(struct pinctrl_dev *pctl_dev, value &= ~BYT_DIR_MASK; if (input) value |= BYT_OUTPUT_EN; - else + else if (readl(conf_reg) & BYT_DIRECT_IRQ_EN) /* * Before making any direction modifications, do a check if gpio * is set for direct IRQ. On baytrail, setting GPIO to output - * does not make sense, so let's at least warn the caller before + * does not make sense, so let's at least inform the caller before * they shoot themselves in the foot. */ - WARN(readl(conf_reg) & BYT_DIRECT_IRQ_EN, - "Potential Error: Setting GPIO with direct_irq_en to output"); + dev_info_once(vg->dev, "Potential Error: Setting GPIO with direct_irq_en to output"); + writel(value, val_reg);
raw_spin_unlock_irqrestore(&byt_lock, flags);