From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Mon, 27 May 2013 00:59:20 +0000 (-0700)
Subject: spi: hspi: fixup long delay time
X-Git-Tag: firefly_0821_release~3680^2~331^2~2^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=bc2bfffc3866e8c87dde19d5619262a810a51ed8;p=firefly-linux-kernel-4.4.55.git

spi: hspi: fixup long delay time

Current HSPI driver is using msleep(20) on hspi_status_check_timeout(),
but it was too long delay for SPI device.
Bock-W board SPI access was too slow without this patch.
This patch uses udelay(10) for it.

Tested-by: Yusuke Goda <yusuke.goda.sx@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---

diff --git a/drivers/spi/spi-sh-hspi.c b/drivers/spi/spi-sh-hspi.c
index 60cfae51c713..eab593eaaafa 100644
--- a/drivers/spi/spi-sh-hspi.c
+++ b/drivers/spi/spi-sh-hspi.c
@@ -89,7 +89,7 @@ static int hspi_status_check_timeout(struct hspi_priv *hspi, u32 mask, u32 val)
 		if ((mask & hspi_read(hspi, SPSR)) == val)
 			return 0;
 
-		msleep(20);
+		udelay(10);
 	}
 
 	dev_err(hspi->dev, "timeout\n");