diff options
author | Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@renesas.com> | 2018-09-05 10:49:37 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-10-03 17:01:49 -0700 |
commit | b6581ea1fd2eeb3ce538c42434adb7c9082d6339 (patch) | |
tree | 243c9317cec5f0ad5b32a2ca89b74ee6c870a02a /drivers | |
parent | 228cc0731f40fade83aa60bd30eefb47ee7631bd (diff) |
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>
Diffstat (limited to 'drivers')
-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 bc2c8a77b161..711ea523b325 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -373,7 +373,8 @@ 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, |