This patch adds support for the SPI controller found on the Broadcom BCM63xx
SoCs.

Signed-off-by: Tanguy Bouzeloc <redacted>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
---
Changes since v2:
- reworked bcm63xx_spi_setup_transfer to choose closest spi transfer
 frequency
- removed invalid 25Mhz frequency
- fixed some minor checkpatch issues

Changes since v1:
- switched to the devm_* API which frees resources automatically
- switched to dev_pm_ops
- use module_platform_driver
- remove MODULE_VERSION()
- fixed return value when clock is not present using PTR_ERR()
- fixed probe() error path to disable clock in case of failure

 drivers/spi/Kconfig       |    6 +
 drivers/spi/Makefile      |    1 +
 drivers/spi/spi-bcm63xx.c |  486 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 493 insertions(+), 0 deletions(-)
 create mode 100644 drivers/spi/spi-bcm63xx.c

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 3f9a47e..16818ac 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig

@@ -94,6 +94,12 @@ config SPI_AU1550

         If you say yes to this option, support will be included for the
         PSC SPI controller found on Au1550, Au1200 and Au1300 series.

+config SPI_BCM63XX
+       tristate "Broadcom BCM63xx SPI controller"
+       depends on BCM63XX
+       help
+          Enable support for the SPI controller on the Broadcom BCM63xx SoCs.
+
 config SPI_BITBANG
       tristate "Utilities for Bitbanging SPI masters"
       help

diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 61c3261..be38f73 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile

@@ -14,6 +14,7 @@ obj-$(CONFIG_SPI_ALTERA)              += spi-altera.o

 obj-$(CONFIG_SPI_ATMEL)                        += spi-atmel.o
 obj-$(CONFIG_SPI_ATH79)                        += spi-ath79.o
 obj-$(CONFIG_SPI_AU1550)               += spi-au1550.o
+obj-$(CONFIG_SPI_BCM63XX)              += spi-bcm63xx.o
 obj-$(CONFIG_SPI_BFIN)                 += spi-bfin5xx.o
 obj-$(CONFIG_SPI_BFIN_SPORT)           += spi-bfin-sport.o
 obj-$(CONFIG_SPI_BITBANG)              += spi-bitbang.o

diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c
new file mode 100644
index 0000000..eba8505
--- /dev/null
+++ b/drivers/spi/spi-bcm63xx.c

@@ -0,0 +1,486 @@
+/*
+ * Broadcom BCM63xx SPI controller support
+ *
+ * Copyright (C) 2009-2011 Florian Fainelli <florian@openwrt.org>
+ * Copyright (C) 2010 Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/spi/spi.h>
+#include <linux/completion.h>
+#include <linux/err.h>
+
+#include <bcm63xx_dev_spi.h>
+
+#define PFX            KBUILD_MODNAME
+#define DRV_VER                "0.1.2"
+
+struct bcm63xx_spi {
+       spinlock_t              lock;
+       int                     stopping;
+       struct completion       done;
+
+       void __iomem            *regs;
+       int                     irq;
+
+       /* Platform data */
+       u32                     speed_hz;
+       unsigned                fifo_size;
+
+       /* Data buffers */
+       const unsigned char     *tx_ptr;
+       unsigned char           *rx_ptr;
+
+       /* data iomem */
+       u8 __iomem              *tx_io;
+       const u8 __iomem        *rx_io;
+
+       int                     remaining_bytes;
+
+       struct clk              *clk;
+       struct platform_device  *pdev;
+};
+
+static inline u8 bcm_spi_readb(struct bcm63xx_spi *bs,
+                               unsigned int offset)
+{
+       return bcm_readw(bs->regs + bcm63xx_spireg(offset));