[ARM] 5128/1: tc6393xb: tmio-nand support

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

4 files changed, 83 insertions, 0 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 8ebc0be10953..7dff105e8f83 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -45,6 +45,7 @@ config HTC_PASIC3
 config MFD_TC6393XB
         bool "Support Toshiba TC6393XB"
         depends on HAVE_GPIO_LIB
+        select MFD_CORE
         help
           Support for Toshiba Mobile IO Controller TC6393XB
 
diff --git a/drivers/mfd/tc6393xb.c b/drivers/mfd/tc6393xb.c
index 4d7192edefe1..2d87501b6fd4 100644
--- a/drivers/mfd/tc6393xb.c
+++ b/drivers/mfd/tc6393xb.c
@@ -21,6 +21,8 @@
 #include <linux/platform_device.h>
 #include <linux/fb.h>
 #include <linux/clk.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tmio.h>
 #include <linux/mfd/tc6393xb.h>
 #include <linux/gpio.h>
 
@@ -108,6 +110,59 @@ struct tc6393xb {
         int                     irq_base;
 };
 
+enum {
+        TC6393XB_CELL_NAND,
+};
+
+/*--------------------------------------------------------------------------*/
+
+static int tc6393xb_nand_enable(struct platform_device *nand)
+{
+        struct platform_device *dev = to_platform_device(nand->dev.parent);
+        struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
+        unsigned long flags;
+
+        spin_lock_irqsave(&tc6393xb->lock, flags);
+
+        /* SMD buffer on */
+        dev_dbg(&dev->dev, "SMD buffer on\n");
+        iowrite8(0xff, tc6393xb->scr + SCR_GPI_BCR(1));
+
+        spin_unlock_irqrestore(&tc6393xb->lock, flags);
+
+        return 0;
+}
+
+static struct resource __devinitdata tc6393xb_nand_resources[] = {
+        {
+                .name   = TMIO_NAND_CONFIG,
+                .start  = 0x0100,
+                .end    = 0x01ff,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .name   = TMIO_NAND_CONTROL,
+                .start  = 0x1000,
+                .end    = 0x1007,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .name   = TMIO_NAND_IRQ,
+                .start  = IRQ_TC6393_NAND,
+                .end    = IRQ_TC6393_NAND,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct mfd_cell __devinitdata tc6393xb_cells[] = {
+        [TC6393XB_CELL_NAND] = {
+                .name = "tmio-nand",
+                .enable = tc6393xb_nand_enable,
+                .num_resources = ARRAY_SIZE(tc6393xb_nand_resources),
+                .resources = tc6393xb_nand_resources,
+        },
+};
+
 /*--------------------------------------------------------------------------*/
 
 static int tc6393xb_gpio_get(struct gpio_chip *chip,
@@ -410,6 +465,12 @@ static int __devinit tc6393xb_probe(struct platform_device *dev)
         if (tc6393xb->irq)
                 tc6393xb_attach_irq(dev);
 
+        tc6393xb_cells[TC6393XB_CELL_NAND].driver_data = tcpd->nand_data;
+
+        retval = mfd_add_devices(dev,
+                        tc6393xb_cells, ARRAY_SIZE(tc6393xb_cells),
+                        iomem, tcpd->irq_base);
+
         return 0;
 
         if (tc6393xb->irq)
@@ -440,6 +501,8 @@ static int __devexit tc6393xb_remove(struct platform_device *dev)
         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
         int ret;
 
+        mfd_remove_devices(dev);
+
         if (tc6393xb->irq)
                 tc6393xb_detach_irq(dev);
 
diff --git a/include/linux/mfd/tc6393xb.h b/include/linux/mfd/tc6393xb.h
index 0e3dd4ca523b..7cc824a58f7c 100644
--- a/include/linux/mfd/tc6393xb.h
+++ b/include/linux/mfd/tc6393xb.h
@@ -31,6 +31,8 @@ struct tc6393xb_platform_data {
 
         int     irq_base;       /* a base for cascaded irq */
         int     gpio_base;
+
+        struct tmio_nand_data   *nand_data;
 };
 
 /*
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
new file mode 100644
index 000000000000..9438d8c9ac1c
--- /dev/null
+++ b/include/linux/mfd/tmio.h
@@ -0,0 +1,17 @@
+#ifndef MFD_TMIO_H
+#define MFD_TMIO_H
+
+/*
+ * data for the NAND controller
+ */
+struct tmio_nand_data {
+        struct nand_bbt_descr   *badblock_pattern;
+        struct mtd_partition    *partition;
+        unsigned int            num_partitions;
+};
+
+#define TMIO_NAND_CONFIG        "tmio-nand-config"
+#define TMIO_NAND_CONTROL       "tmio-nand-control"
+#define TMIO_NAND_IRQ           "tmio-nand"
+
+#endif