diff options
| author | Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@renesas.com> | 2018-09-05 10:49:37 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-09-05 12:39:57 +0100 |
| commit | 31a5fae4c5a009898da6d177901d5328051641ff (patch) | |
| tree | d080addcb71d9096e1d8d808278d685f0c109dda /drivers/spi | |
| parent | ffa69d6a16f686efe45269342474e421f2aa58b2 (diff) | |
| download | linux-31a5fae4c5a009898da6d177901d5328051641ff.tar.bz2 | |
spi: sh-msiof: Fix handling of write value for SISTR register
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
Diffstat (limited to 'drivers/spi')
| -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 bfe4e6d4f7bf..101cd6aae2ea 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -397,7 +397,8 @@ 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, |