Merge remote-tracking branch 'l2-mtd/master'

[karo-tx-linux.git] / drivers / mtd / nand / gpmi-nand / gpmi-lib.c

diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-lib.c b/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
index 4f8857fa48a7f93f502e7b0d1a2581eebac64234..aaced29727fb0437f6a0c142253b04cbc0ca82d0 100644 (file)
--- a/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
+++ b/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
@@ -187,6 +187,12 @@ int gpmi_init(struct gpmi_nand_data *this)
        /* Select BCH ECC. */
        writel(BM_GPMI_CTRL1_BCH_MODE, r->gpmi_regs + HW_GPMI_CTRL1_SET);
 
+       /*
+        * Decouple the chip select from dma channel. We use dma0 for all
+        * the chips.
+        */
+       writel(BM_GPMI_CTRL1_DECOUPLE_CS, r->gpmi_regs + HW_GPMI_CTRL1_SET);
+
        gpmi_disable_clk(this);
        return 0;
 err_out:
@@ -1073,6 +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);