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Input: sh_keysc - switch to threaded IRQ handler 

Update the KEYSC driver to make use of threaded IRQs with IRQF_ONESHOT
to improve interrupt latency. The driver is using udelay() in the ISR
to make sure the hardware has stabilized. Without using interrupt threads
this delay may affect the latency of the rest of the system.

Also pass dev_name() as string for /proc/interrupts.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Magnus Damm 2011-04-28 09:34:32 -07:00 committed by Dmitry Torokhov
parent b6d2a3e6ff
commit 2dfb9a85ec
1 changed files with 2 additions and 1 deletions
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3
drivers/input/keyboard/sh_keysc.c
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@ -231,7 +231,8 @@ static int __devinit sh_keysc_probe(struct platform_device *pdev)
input->keycodesize = sizeof(pdata->keycodes[0]); input->keycodesize = sizeof(pdata->keycodes[0]);
input->keycodemax = ARRAY_SIZE(pdata->keycodes); input->keycodemax = ARRAY_SIZE(pdata->keycodes);
error = request_irq(irq, sh_keysc_isr, 0, pdev->name, pdev); error = request_threaded_irq(irq, NULL, sh_keysc_isr, IRQF_ONESHOT,
dev_name(&pdev->dev), pdev);
if (error) { if (error) {
dev_err(&pdev->dev, "failed to request IRQ\n"); dev_err(&pdev->dev, "failed to request IRQ\n");
goto err3; goto err3;