mtd: sunxi_nand: Select the chip in sunxi_nand_chip_init_timings()

nand_scan_ident() leaves the chip deselected. So just issuing some commands
from the sunxi driver does not work. We need to select the chip before
writing the commands to the NAND device. This patch takes care of this.

Set the new timing on all dies implemented as suggested by Boris.

This was detected on the in-circuit ICnova-A20 SoM equipped with the
Micron MT29F32G08CBACAWP (4GiB) ONFI NAND device.

Signed-off-by: Stefan Roese <[email protected]>
Cc: Hans de Goede <[email protected]>
Cc: Maxime Ripard <[email protected]>
Cc: Roy Spliet <[email protected]>
Acked-by: Boris Brezillon <[email protected]>
[Brian: fixup whitespace]
Signed-off-by: Brian Norris <[email protected]>

1 files changed, 9 insertions, 3 deletions

diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c
index f97a58d6aae1..4e586bc758a6 100644
--- a/drivers/mtd/nand/sunxi_nand.c
+++ b/drivers/mtd/nand/sunxi_nand.c
@@ -978,17 +978,23 @@ static int sunxi_nand_chip_init_timings(struct sunxi_nand_chip *chip,
 		mode = chip->nand.onfi_timing_mode_default;
 	} else {
 		uint8_t feature[ONFI_SUBFEATURE_PARAM_LEN] = {};
+		int i;
 
 		mode = fls(mode) - 1;
 		if (mode < 0)
 			mode = 0;
 
 		feature[0] = mode;
-		ret = chip->nand.onfi_set_features(&chip->mtd, &chip->nand,
+		for (i = 0; i < chip->nsels; i++) {
+			chip->nand.select_chip(&chip->mtd, i);
+			ret = chip->nand.onfi_set_features(&chip->mtd,
+						&chip->nand,
 						ONFI_FEATURE_ADDR_TIMING_MODE,
 						feature);
-		if (ret)
-			return ret;
+			chip->nand.select_chip(&chip->mtd, -1);
+			if (ret)
+				return ret;
+		}
 	}
 
 	timings = onfi_async_timing_mode_to_sdr_timings(mode);