From: Hiromitsu Yamasaki <[email protected]> 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 <[email protected]> [geert: reword] Signed-off-by: Geert Uytterhoeven <[email protected]> --- drivers/spi/spi-sh-msiof.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index bfe4e6d4f7bff66c..101cd6aae2ea520a 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, -- 2.17.1
