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mtd: gpmi: imx6: fix the wrong method for checking ready/busy

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In the imx6, all the ready/busy pins are binding togeter.
So we should always check the ready/busy pin of the chip 0.

In the other word, when the CS1 is enabled, we should also check the
ready/busy of chip 0; if we check the ready/busy of chip 1,
we will get the wrong result.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Huang Shijie 2013-08-27 17:29:07 +08:00 committed by Brian Norris
parent a5370e9ed5
commit 7caa4fd290
1 changed files with 7 additions and 0 deletions
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7
drivers/mtd/nand/gpmi-nand/gpmi-lib.c
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@ -1079,6 +1079,13 @@ int gpmi_is_ready(struct gpmi_nand_data *this, unsigned chip)
mask = MX23_BM_GPMI_DEBUG_READY0 << chip;
reg = readl(r->gpmi_regs + HW_GPMI_DEBUG);
} else if (GPMI_IS_MX28(this) || GPMI_IS_MX6Q(this)) {
/*
* In the imx6, all the ready/busy pins are bound
* together. So we only need to check chip 0.
*/
if (GPMI_IS_MX6Q(this))
chip = 0;
/* MX28 shares the same R/B register as MX6Q. */
mask = MX28_BF_GPMI_STAT_READY_BUSY(1 << chip);
reg = readl(r->gpmi_regs + HW_GPMI_STAT);