mtd: rawnand: fsmc: Take instruction delay into account

commit a4ca0c439f2d5ce9a3dc118d882f9f03449864c8 upstream.

The FSMC NAND controller should apply a delay after the
instruction has been issued on the bus.
The FSMC NAND controller driver did not handle this delay.

Add this waiting delay in the FSMC NAND controller driver.

Fixes: 4da712e70294 ("mtd: nand: fsmc: use ->exec_op()")
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20211119150316.43080-4-herve.codina@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/mtd/nand/raw/fsmc_nand.c b/drivers/mtd/nand/raw/fsmc_nand.c
index a31bb1da44ec9496bd74e121ca5a2074b84a69ae..9692a71f53565c2b400dec482974cc832ee31e3f 100644 (file)
--- a/drivers/mtd/nand/raw/fsmc_nand.c
+++ b/drivers/mtd/nand/raw/fsmc_nand.c
@@ -18,6 +18,7 @@
 
 #include <linux/clk.h>
 #include <linux/completion.h>
+#include <linux/delay.h>
 #include <linux/dmaengine.h>
 #include <linux/dma-direction.h>
 #include <linux/dma-mapping.h>
@@ -700,6 +701,9 @@ static int fsmc_exec_op(struct nand_chip *chip, const struct nand_operation *op,
                                                instr->ctx.waitrdy.timeout_ms);
                        break;
                }
+
+               if (instr->delay_ns)
+                       ndelay(instr->delay_ns);
        }
 
        return ret;