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sh: add kycr2_delay for sh_keysc

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After KYCR2 is set, udelay might become necessary if there are only a
small number of keys attached. This patch introduces an optional delay
through the platform data to address this problem.

Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Kuninori Morimoto
2009-09-15 00:21:34 +00:00
committed by Paul Mundt
parent 033eb0acdd
commit 1f85d38106
2 changed files with 4 additions and 0 deletions
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3
drivers/input/keyboard/sh_keysc.c
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@@ -80,6 +80,9 @@ static irqreturn_t sh_keysc_isr(int irq, void *dev_id)
iowrite16(KYCR2_IRQ_LEVEL | (keyin_set << 8),
priv->iomem_base + KYCR2_OFFS);
if (pdata->kycr2_delay)
udelay(pdata->kycr2_delay);
keys ^= ~0;
keys &= (1 << (sh_keysc_mode[pdata->mode].keyin *
sh_keysc_mode[pdata->mode].keyout)) - 1;