[PATCH] spi: spi-mtk-nor: support standard spi properties

[PATCH] spi: spi-mtk-nor: support standard spi properties

[Ikjoon Jang]

Use default supports_op() to support spi-[rt]x-bus-width properties.
And check dummy op's byte length instead of its bus width for output.

Signed-off-by: Ikjoon Jang <ikjn@chromium.org>
---
 drivers/spi/spi-mtk-nor.c | 29 ++++++++++++++++-------------
 1 file changed, 16 insertions(+), 13 deletions(-)

diff --git a/drivers/spi/spi-mtk-nor.c b/drivers/spi/spi-mtk-nor.c
index b08d8e9a8ee9..6e6ca2b8e6c8 100644
--- a/drivers/spi/spi-mtk-nor.c
+++ b/drivers/spi/spi-mtk-nor.c
@@ -211,25 +211,28 @@ static bool mtk_nor_supports_op(struct spi_mem *mem,
 	if (op->cmd.buswidth != 1)
 		return false;
 
-	/* DTR ops not supported. */
-	if (op->cmd.dtr || op->addr.dtr || op->dummy.dtr || op->data.dtr)
-		return false;
-	if (op->cmd.nbytes != 1)
-		return false;
-
 	if ((op->addr.nbytes == 3) || (op->addr.nbytes == 4)) {
-		if ((op->data.dir == SPI_MEM_DATA_IN) && mtk_nor_match_read(op))
-			return true;
-		else if (op->data.dir == SPI_MEM_DATA_OUT)
-			return (op->addr.buswidth == 1) &&
-			       (op->dummy.buswidth == 0) &&
-			       (op->data.buswidth == 1);
+		switch(op->data.dir) {
+		case SPI_MEM_DATA_IN:
+			if (!mtk_nor_match_read(op))
+				return false;
+			break;
+		case SPI_MEM_DATA_OUT:
+			if ((op->addr.buswidth != 1) ||
+			    (op->dummy.nbytes != 0) ||
+			    (op->data.buswidth != 1))
+				return false;
+			break;
+		default:
+			break;
+		}
 	}
 	len = op->cmd.nbytes + op->addr.nbytes + op->dummy.nbytes;
 	if ((len > MTK_NOR_PRG_MAX_SIZE) ||
 	    ((op->data.nbytes) && (len == MTK_NOR_PRG_MAX_SIZE)))
 		return false;
-	return true;
+
+	return spi_mem_default_supports_op(mem, op);
 }
 
 static void mtk_nor_setup_bus(struct mtk_nor *sp, const struct spi_mem_op *op)
-- 
2.28.0.297.g1956fa8f8d-goog

Re: [PATCH] spi: spi-mtk-nor: support standard spi properties

[Mark Brown]

On Wed, 26 Aug 2020 17:18:52 +0800, Ikjoon Jang wrote:
> Use default supports_op() to support spi-[rt]x-bus-width properties.
> And check dummy op's byte length instead of its bus width for output.

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next

Thanks!

[1/1] spi: spi-mtk-nor: support standard spi properties
      commit: a59b2c7c56bf795cc13139d2634e86a3da7a0314

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark