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

drivers/mtd/onenand/omap2.c

+7 −2
Original line number Diff line number Diff line
@@ -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);

		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) {