Unverified Commit 31a5fae4 authored Sep 05, 2018 by Hiromitsu Yamasaki Committed by Mark Brown Sep 05, 2018

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

parent ffa69d6a

drivers/spi/spi-sh-msiof.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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,

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