From: Roman Tereshonkov <roman.tereshonkov@nokia.com>
Date: Mon, 15 Mar 2010 09:06:28 +0000 (+0000)
Subject: omap2_mcspi: Flush posted writes
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a330ce2001b290c59fe98c37e981683ef0a75fdf;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

omap2_mcspi: Flush posted writes

mcspi_write_chconf0 is used to control rx/tx triggering.
Post-write flushing is needed to get the immediate effect.

Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
---

diff --git a/drivers/spi/omap2_mcspi.c b/drivers/spi/omap2_mcspi.c
index d8356af118a8..581bd2169d7b 100644
--- a/drivers/spi/omap2_mcspi.c
+++ b/drivers/spi/omap2_mcspi.c
@@ -204,6 +204,7 @@ static inline void mcspi_write_chconf0(const struct spi_device *spi, u32 val)
 
 	cs->chconf0 = val;
 	mcspi_write_cs_reg(spi, OMAP2_MCSPI_CHCONF0, val);
+	mcspi_read_cs_reg(spi, OMAP2_MCSPI_CHCONF0);
 }
 
 static void omap2_mcspi_set_dma_req(const struct spi_device *spi,