From: Sunny Luo <sunny.luo@amlogic.com>
Date: Thu, 19 Sep 2019 11:21:34 +0000 (+0800)
Subject: spicc: fix the condition issue of dma [1/1]
X-Git-Tag: hardkernel-4.9.236-104~522
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a5f97be7baaeea94fa510ba8c1993fd0b32dff8b;p=platform%2Fkernel%2Flinux-amlogic.git

spicc: fix the condition issue of dma [1/1]

PD#SH-1213

Problem:
spicc will not run dma if bits_per_word isn't 64,
though dma mapped by the slave driver.

Solution:
change to run dma once dma mapped

Verify:
axg s400

Change-Id: I8625f973bdd5a2d69831e2c766dd43bc0417e0a5
Signed-off-by: Sunny Luo <sunny.luo@amlogic.com>
---

diff --git a/drivers/spi/spi-meson-spicc.c b/drivers/spi/spi-meson-spicc.c
index ea35284..987316a 100644
--- a/drivers/spi/spi-meson-spicc.c
+++ b/drivers/spi/spi-meson-spicc.c
@@ -555,9 +555,9 @@ static void meson_spicc_setup_xfer(struct meson_spicc_device *spicc,
 	meson_spicc_auto_io_delay(spicc);
 
 	spicc->using_dma = 0;
-	if ((xfer->bits_per_word == 64)
-	    && (spicc->message->is_dma_mapped
-		|| !meson_spicc_dma_map(spicc, xfer))) {
+	if (spicc->message->is_dma_mapped ||
+	    ((xfer->bits_per_word == 64) &&
+	     !meson_spicc_dma_map(spicc, xfer))) {
 		spicc->using_dma = 1;
 		writel_relaxed(xfer->tx_dma, spicc->base + SPICC_DRADDR);
 		writel_relaxed(xfer->rx_dma, spicc->base + SPICC_DWADDR);
@@ -585,6 +585,9 @@ static int meson_spicc_transfer_one(struct spi_master *master,
 	spicc->bytes_per_word =
 	   DIV_ROUND_UP(spicc->xfer->bits_per_word, 8);
 
+	if (spicc->message->is_dma_mapped)
+		spicc->bytes_per_word = 8;
+
 	if (xfer->len % spicc->bytes_per_word)
 		return -EINVAL;