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[MTD] [OneNAND] OMAP3: add delay for GPIO

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On OMAP3, the driver was occasionally not seeing the GPIO
interrupt.  Adding a small delay of one register read
eliminates the problem.

Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Adrian Hunter 2008-08-14 14:00:12 +03:00 committed by David Woodhouse
parent bde86fec7c
commit 782b7a367d
1 changed files with 7 additions and 2 deletions
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9
drivers/mtd/onenand/omap2.c
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@ -141,8 +141,13 @@ static int omap2_onenand_wait(struct mtd_info *mtd, int state)
/* Turn interrupts on */ /* Turn interrupts on */
syscfg = read_reg(c, ONENAND_REG_SYS_CFG1); syscfg = read_reg(c, ONENAND_REG_SYS_CFG1);
syscfg |= ONENAND_SYS_CFG1_IOBE; if (!(syscfg & ONENAND_SYS_CFG1_IOBE)) {
write_reg(c, syscfg, ONENAND_REG_SYS_CFG1); syscfg |= ONENAND_SYS_CFG1_IOBE;
write_reg(c, syscfg, ONENAND_REG_SYS_CFG1);
if (cpu_is_omap34xx())
/* Add a delay to let GPIO settle */
syscfg = read_reg(c, ONENAND_REG_SYS_CFG1);
}
INIT_COMPLETION(c->irq_done); INIT_COMPLETION(c->irq_done);
if (c->gpio_irq) { if (c->gpio_irq) {