On 09/06/2017 10:05 AM, Dirk Behme wrote:
From: Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@xxxxxxxxxxx>
Reset register before starting transfer.
Signed-off-by: Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@xxxxxxxxxxx>
Signed-off-by: Dirk Behme <dirk.behme@xxxxxxxxxxxx>
---
drivers/spi/spi-sh-msiof.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index fdad8d852602..e8aebd406477 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
[...]
@@ -254,6 +256,25 @@ static irqreturn_t sh_msiof_spi_irq(int irq, void *data)
return IRQ_HANDLED;
}
+static void sh_msiof_spi_reset_regs(struct sh_msiof_spi_priv *p)
+{
+ u32 mask = CTR_TXRST | CTR_RXRST;
*const*?
+ u32 data;
+ int k;
+
+ data = sh_msiof_read(p, CTR);
+ data |= mask;
+
Don't think empty line is needed here.
+ sh_msiof_write(p, CTR, data);
+
+ for (k = 100; k > 0; k--) {
+ if (!(sh_msiof_read(p, CTR) & mask))
+ break;
+
+ udelay(10);
+ }
+}
+
static struct {
unsigned short div;
unsigned short brdv;
[...]
MBR, Sergei
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