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authorHuang Shijie <b32955@freescale.com>2013-08-27 13:29:07 +0400
committerBrian Norris <computersforpeace@gmail.com>2013-11-07 11:33:03 +0400
commit7caa4fd29068cccaa7be20914af6d23f261be3eb (patch)
tree6b833619fef7e078e2be550806466fac211dfbce /drivers/mtd/nand/gpmi-nand
parenta5370e9ed567e68ac261b28a242832eb09fe8559 (diff)
downloadlinux-7caa4fd29068cccaa7be20914af6d23f261be3eb.tar.xz
mtd: gpmi: imx6: fix the wrong method for checking ready/busy
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>
Diffstat (limited to 'drivers/mtd/nand/gpmi-nand')
-rw-r--r--drivers/mtd/nand/gpmi-nand/gpmi-lib.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-lib.c b/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
index 7d56d87599c0..aaced29727fb 100644
--- a/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
+++ b/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
@@ -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);