From ba427678a419a59c091e1c816c13852fa05b24bf Mon Sep 17 00:00:00 2001 From: Prabhakar Kushwaha <prabhakar@freescale.com> Date: Wed, 7 Nov 2012 21:52:27 +0000 Subject: [PATCH] driver/mtd/IFC:Wait tWB time, poll R/B before command execution IFC_FIR_OP_CMD0 issues command for execution without checking flash readiness. It may cause problem if flash is not ready. Instead use IFC_FIR_OP_CW0 which Wait for tWB time and poll R/B to return high or time-out, before issuing command. NAND_CMD_READID command implemention does not fulfill above requirement. So update its programming. Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com> Signed-off-by: Hemant Nautiyal <hemant.nautiyal@freescale.com> --- drivers/mtd/nand/fsl_ifc_nand.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c index 0878bece67..b13d8a9303 100644 --- a/drivers/mtd/nand/fsl_ifc_nand.c +++ b/drivers/mtd/nand/fsl_ifc_nand.c @@ -391,7 +391,7 @@ static void fsl_ifc_cmdfunc(struct mtd_info *mtd, unsigned int command, timing = IFC_FIR_OP_RBCD; out_be32(&ifc->ifc_nand.nand_fir0, - (IFC_FIR_OP_CMD0 << IFC_NAND_FIR0_OP0_SHIFT) | + (IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | (IFC_FIR_OP_UA << IFC_NAND_FIR0_OP1_SHIFT) | (timing << IFC_NAND_FIR0_OP2_SHIFT)); out_be32(&ifc->ifc_nand.nand_fcr0, @@ -758,7 +758,7 @@ static void fsl_ifc_sram_init(void) /* READID */ out_be32(&ifc->ifc_nand.nand_fir0, - (IFC_FIR_OP_CMD0 << IFC_NAND_FIR0_OP0_SHIFT) | + (IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | (IFC_FIR_OP_UA << IFC_NAND_FIR0_OP1_SHIFT) | (IFC_FIR_OP_RB << IFC_NAND_FIR0_OP2_SHIFT)); out_be32(&ifc->ifc_nand.nand_fcr0, -- 2.39.5