From: Jason Wu <jason.wu@petalogix.com>
Date: Fri, 23 Nov 2012 05:05:08 +0000 (+1000)
Subject: spi: xilinx_spi: Perform software reset during slave setup
X-Git-Tag: v2013.04-rc1~63^2~4
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=85e9c65f8a9615ac11257939e5dbd601ee811be4;p=oweals%2Fu-boot.git

spi: xilinx_spi: Perform software reset during slave setup

to make sure it is in the clear state.

Signed-off-by: Jason Wu <huanyu@xilinx.com>
---

diff --git a/drivers/spi/xilinx_spi.c b/drivers/spi/xilinx_spi.c
index 52a4134f18..db01cc25f7 100644
--- a/drivers/spi/xilinx_spi.c
+++ b/drivers/spi/xilinx_spi.c
@@ -99,6 +99,8 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	debug("%s: bus:%i cs:%i base:%p mode:%x max_hz:%d\n", __func__,
 		bus, cs, xilspi->regs, xilspi->mode, xilspi->freq);
 
+	writel(SPISSR_RESET_VALUE, &xilspi->regs->srr);
+
 	return &xilspi->slave;
 }
 
diff --git a/drivers/spi/xilinx_spi.h b/drivers/spi/xilinx_spi.h
index 32610d2a12..69d0b94058 100644
--- a/drivers/spi/xilinx_spi.h
+++ b/drivers/spi/xilinx_spi.h
@@ -119,6 +119,9 @@ struct xilinx_spi_reg {
 #define SPIRFOR_OCYVAL_POS	0
 #define SPIRFOR_OCYVAL_MASK	(0xf << SPIRFOR_OCYVAL_POS)
 
+/* SPI Software Reset Register (ssr) */
+#define SPISSR_RESET_VALUE	0x0a
+
 struct xilinx_spi_slave {
 	struct spi_slave slave;
 	struct xilinx_spi_reg *regs;