diff options
| author | Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@renesas.com> | 2018-09-05 10:49:37 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-10-10 08:52:07 +0200 |
| commit | 348abf931415cc4032b6d66ddb4eb2692ea5c65d (patch) | |
| tree | e9d72de157f93054de3eb927848b42999e0c314d | |
| parent | 6b35618c6e97d96148caacefcf9c7f484f17bb65 (diff) | |
| download | linux-stable-348abf931415cc4032b6d66ddb4eb2692ea5c65d.tar.gz linux-stable-348abf931415cc4032b6d66ddb4eb2692ea5c65d.tar.bz2 linux-stable-348abf931415cc4032b6d66ddb4eb2692ea5c65d.zip | |
spi: sh-msiof: Fix handling of write value for SISTR register
commit 31a5fae4c5a009898da6d177901d5328051641ff upstream.
This patch changes writing to the SISTR register according to the H/W
user's manual.
The TDREQ bit and RDREQ bits of SISTR are read-only, and must be written
their initial values of zero.
Signed-off-by: Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@renesas.com>
[geert: reword]
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/spi/spi-sh-msiof.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index 19905e6caa14..03b566848da6 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -374,7 +374,8 @@ static void sh_msiof_spi_set_mode_regs(struct sh_msiof_spi_priv *p, static void sh_msiof_reset_str(struct sh_msiof_spi_priv *p) { - sh_msiof_write(p, STR, sh_msiof_read(p, STR)); + sh_msiof_write(p, STR, + sh_msiof_read(p, STR) & ~(STR_TDREQ | STR_RDREQ)); } static void sh_msiof_spi_write_fifo_8(struct sh_msiof_spi_priv *p, |