Eric Lee / smarc-ti-linux-kernel

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Commit 185a8852eb1c8a205895a37d8d2b6bd3bfaee834

Authored by Dave Gerlach
Committed by Kishon Vijay Abraham I
1 parent be4c522b3c
Exists in ti-linux-3.12.y and in 3 other branches newt-ti-linux-3.12.y, smarc-ti-linux-3.12.10, smarc-ti-linux-3.12.y

input: touchscreen: ti_am335x_tsc: Flush interrupts before suspend 

Previously, pending interrupts in tscadc were causing HW_PEN interrupt,
needed for wake from DS0, to get disabled immediately by IRQ handler
after being enabled. Flush all pending interrupts in suspend handler
before enabling HW_PENi interrupt so that this no longer happens and
board is able to wake from DS0 on a touch event.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>

Showing 1 changed file with 3 additions and 0 deletions Side-by-side Diff

drivers/input/touchscreen/ti_am335x_tsc.c
Diff comments   View file @ 185a885
... ... @@ -465,6 +465,9 @@
465 465  
466 466 tscadc_dev = ti_tscadc_dev_get(to_platform_device(dev));
467 467 if (device_may_wakeup(tscadc_dev->dev)) {
  468 + /* Flush any pending interrupts */
  469 + titsc_writel(ts_dev, REG_IRQSTATUS, 0xffffffff);
  470 +
468 471 idle = titsc_readl(ts_dev, REG_IRQENABLE);
469 472 titsc_writel(ts_dev, REG_IRQENABLE,
470 473 (idle | IRQENB_HW_PEN));