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Commit 6074b71d authored by Hiromitsu Yamasaki's avatar Hiromitsu Yamasaki Committed by Greg Kroah-Hartman
Browse files

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: default avatarHiromitsu Yamasaki <hiromitsu.yamasaki.ym@renesas.com>
[geert: reword]
Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d120858f

drivers/spi/spi-sh-msiof.c

+2 −1
Original line number Diff line number Diff line
@@ -384,7 +384,8 @@ 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,