Commit 782b7a36 authored by Adrian Hunter's avatar Adrian Hunter Committed by David Woodhouse

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

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: default avatarAdrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent bde86fec
......@@ -141,8 +141,13 @@ static int omap2_onenand_wait(struct mtd_info *mtd, int state)
/* Turn interrupts on */
syscfg = read_reg(c, ONENAND_REG_SYS_CFG1);
syscfg |= ONENAND_SYS_CFG1_IOBE;
write_reg(c, syscfg, ONENAND_REG_SYS_CFG1);
if (!(syscfg & ONENAND_SYS_CFG1_IOBE)) {
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);
if (c->gpio_irq) {
......
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