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Message-ID: <20180414095153.32060-3-vigneshr@ti.com> Date: Sat, 14 Apr 2018 15:21:52 +0530 From: Vignesh R <vigneshr@...com> To: Dmitry Torokhov <dmitry.torokhov@...il.com> CC: Vignesh R <vigneshr@...com>, Grygorii Strashko <grygorii.strashko@...com>, <linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>, Tony Lindgren <tony@...mide.com> Subject: [PATCH v2 2/3] Input: ti_am335x_tsc - Ack pending IRQs at probe and before suspend From: Grygorii Strashko <grygorii.strashko@...com> It is seen that just enabling the TSC module triggers a HW_PEN IRQ without any interaction with touchscreen by user. This results in first suspend/resume sequence to fail as system immediately wakes up from suspend as soon as HW_PEN IRQ is enabled in suspend handler due to the pending IRQ. Therefore clear all IRQs at probe and also in suspend callback for sanity. Signed-off-by: Grygorii Strashko <grygorii.strashko@...com> Signed-off-by: Vignesh R <vigneshr@...com> Acked-by: Lee Jones <lee.jones@...aro.org> --- v2: Add Acks from v1. drivers/input/touchscreen/ti_am335x_tsc.c | 2 ++ include/linux/mfd/ti_am335x_tscadc.h | 1 + 2 files changed, 3 insertions(+) diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c index 810e05c9c4f5..dcd9db768169 100644 --- a/drivers/input/touchscreen/ti_am335x_tsc.c +++ b/drivers/input/touchscreen/ti_am335x_tsc.c @@ -439,6 +439,7 @@ static int titsc_probe(struct platform_device *pdev) dev_err(&pdev->dev, "irq wake enable failed.\n"); } + titsc_writel(ts_dev, REG_IRQSTATUS, IRQENB_MASK); titsc_writel(ts_dev, REG_IRQENABLE, IRQENB_FIFO0THRES); titsc_writel(ts_dev, REG_IRQENABLE, IRQENB_EOS); err = titsc_config_wires(ts_dev); @@ -504,6 +505,7 @@ static int __maybe_unused titsc_suspend(struct device *dev) tscadc_dev = ti_tscadc_dev_get(to_platform_device(dev)); if (device_may_wakeup(tscadc_dev->dev)) { + titsc_writel(ts_dev, REG_IRQSTATUS, IRQENB_MASK); idle = titsc_readl(ts_dev, REG_IRQENABLE); titsc_writel(ts_dev, REG_IRQENABLE, (idle | IRQENB_HW_PEN)); diff --git a/include/linux/mfd/ti_am335x_tscadc.h b/include/linux/mfd/ti_am335x_tscadc.h index b9a53e013bff..1a6a34f726cc 100644 --- a/include/linux/mfd/ti_am335x_tscadc.h +++ b/include/linux/mfd/ti_am335x_tscadc.h @@ -63,6 +63,7 @@ #define IRQENB_FIFO1OVRRUN BIT(6) #define IRQENB_FIFO1UNDRFLW BIT(7) #define IRQENB_PENUP BIT(9) +#define IRQENB_MASK (0x7FF) /* Step Configuration */ #define STEPCONFIG_MODE_MASK (3 << 0) -- 2.17.0
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