From 1403cfa69d310781f9548951c97725c67ffcf613 Mon Sep 17 00:00:00 2001
From: Thor Thayer <thor.thayer@linux.intel.com>
Date: Tue, 5 Nov 2019 14:22:10 -0600
Subject: [PATCH] spi: dw: Fix Designware SPI loopback
Git-commit: 1403cfa69d310781f9548951c97725c67ffcf613
Patch-mainline: v5.5-rc1
References: git-fixes
The SPI_LOOP is set in spi->mode but not propagated to the register.
A previous patch removed the bit during a cleanup.
Fixes: e1bc204894ea ("spi: dw: fix potential variable assignment error")
Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com>
Link: https://lore.kernel.org/r/1572985330-5525-1-git-send-email-thor.thayer@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/spi/spi-dw.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
index 9a49e073e8b7..076652d3d051 100644
--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -308,7 +308,8 @@ static int dw_spi_transfer_one(struct spi_controller *master,
cr0 = (transfer->bits_per_word - 1)
| (chip->type << SPI_FRF_OFFSET)
| ((((spi->mode & SPI_CPOL) ? 1 : 0) << SPI_SCOL_OFFSET) |
- (((spi->mode & SPI_CPHA) ? 1 : 0) << SPI_SCPH_OFFSET))
+ (((spi->mode & SPI_CPHA) ? 1 : 0) << SPI_SCPH_OFFSET) |
+ (((spi->mode & SPI_LOOP) ? 1 : 0) << SPI_SRL_OFFSET))
| (chip->tmode << SPI_TMOD_OFFSET);
/*
--
2.16.4