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| author | Adrian Hunter <ext-adrian.hunter@nokia.com> | 2008-08-14 14:00:12 +0300 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2008-08-15 01:25:30 +0100 |
| commit | 782b7a367d81da005d93b28cb00f9ae086773c24 (patch) | |
| tree | 79d42e09cb7c891f98131798bfee8e7959ea97ad /drivers/mtd/onenand/omap2.c | |
| parent | bde86fec7c822b6009d3cfefc20b76b8d34716af (diff) | |
| download | kernel_samsung_smdk4412-782b7a367d81da005d93b28cb00f9ae086773c24.zip kernel_samsung_smdk4412-782b7a367d81da005d93b28cb00f9ae086773c24.tar.gz kernel_samsung_smdk4412-782b7a367d81da005d93b28cb00f9ae086773c24.tar.bz2 | |
[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: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/onenand/omap2.c')
| -rw-r--r-- | drivers/mtd/onenand/omap2.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c index 40153ac..34b4253 100644 --- a/drivers/mtd/onenand/omap2.c +++ b/drivers/mtd/onenand/omap2.c @@ -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) { |