mtd: gpmi: add a new field for HW_GPMI_CTRL1

add the WRN_DLY_SEL field for HW_GPMI_CTRL1.
This field is used as delay for gpmi write strobe.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-lib.c b/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
index 41e905dfc399..2d1f77c0527e 100644
--- a/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
+++ b/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
@@ -731,6 +731,7 @@ return_results:
         hw->use_half_periods        = dll_use_half_periods;
         hw->sample_delay_factor     = sample_delay_factor;
         hw->device_busy_timeout     = GPMI_DEFAULT_BUSY_TIMEOUT;
+        hw->wrn_dly_sel             = BV_GPMI_CTRL1_WRN_DLY_SEL_4_TO_8NS;
 
         /* Return success. */
         return 0;
@@ -769,6 +770,11 @@ void gpmi_begin(struct gpmi_nand_data *this)
 
         /* [3] The following code is to set the HW_GPMI_CTRL1. */
 
+        /* Set the WRN_DLY_SEL */
+        writel(BM_GPMI_CTRL1_WRN_DLY_SEL, gpmi_regs + HW_GPMI_CTRL1_CLR);
+        writel(BF_GPMI_CTRL1_WRN_DLY_SEL(hw.wrn_dly_sel),
+                                        gpmi_regs + HW_GPMI_CTRL1_SET);
+
         /* DLL_ENABLE must be set to 0 when setting RDN_DELAY or HALF_PERIOD. */
         writel(BM_GPMI_CTRL1_DLL_ENABLE, gpmi_regs + HW_GPMI_CTRL1_CLR);