ARM: mxs: Dynamically allocate duart devices

Dynamically allocate duart devices for MX23 and MX28.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

5 files changed, 189 insertions, 0 deletions

diff --git a/arch/arm/mach-mxs/devices-mx23.h b/arch/arm/mach-mxs/devices-mx23.h
new file mode 100644
index 000000000000..d0f49fc0abb5
--- /dev/null
+++ b/arch/arm/mach-mxs/devices-mx23.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2010 Pengutronix
+ * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
+ *
+ * Copyright 2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License version 2 as published by the
+ * Free Software Foundation.
+ */
+#include <mach/mx23.h>
+#include <mach/devices-common.h>
+
+extern const struct mxs_duart_data mx23_duart_data __initconst;
+#define mx23_add_duart() \
+        mxs_add_duart(&mx23_duart_data)
diff --git a/arch/arm/mach-mxs/devices-mx28.h b/arch/arm/mach-mxs/devices-mx28.h
new file mode 100644
index 000000000000..47c2f0408ec3
--- /dev/null
+++ b/arch/arm/mach-mxs/devices-mx28.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2010 Pengutronix
+ * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
+ *
+ * Copyright 2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License version 2 as published by the
+ * Free Software Foundation.
+ */
+#include <mach/mx28.h>
+#include <mach/devices-common.h>
+
+extern const struct mxs_duart_data mx28_duart_data __initconst;
+#define mx28_add_duart() \
+        mxs_add_duart(&mx28_duart_data)
diff --git a/arch/arm/mach-mxs/devices.c b/arch/arm/mach-mxs/devices.c
new file mode 100644
index 000000000000..6b60f02ca2e3
--- /dev/null
+++ b/arch/arm/mach-mxs/devices.c
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2008 Sascha Hauer, kernel@pengutronix.de
+ *
+ * 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,
+ * Boston, MA  02110-1301, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <mach/common.h>
+
+struct platform_device *__init mxs_add_platform_device_dmamask(
+                const char *name, int id,
+                const struct resource *res, unsigned int num_resources,
+                const void *data, size_t size_data, u64 dmamask)
+{
+        int ret = -ENOMEM;
+        struct platform_device *pdev;
+
+        pdev = platform_device_alloc(name, id);
+        if (!pdev)
+                goto err;
+
+        if (dmamask) {
+                /*
+                 * This memory isn't freed when the device is put,
+                 * I don't have a nice idea for that though.  Conceptually
+                 * dma_mask in struct device should not be a pointer.
+                 * See http://thread.gmane.org/gmane.linux.kernel.pci/9081
+                 */
+                pdev->dev.dma_mask =
+                        kmalloc(sizeof(*pdev->dev.dma_mask), GFP_KERNEL);
+                if (!pdev->dev.dma_mask)
+                        /* ret is still -ENOMEM; */
+                        goto err;
+
+                *pdev->dev.dma_mask = dmamask;
+                pdev->dev.coherent_dma_mask = dmamask;
+        }
+
+        if (res) {
+                ret = platform_device_add_resources(pdev, res, num_resources);
+                if (ret)
+                        goto err;
+        }
+
+        if (data) {
+                ret = platform_device_add_data(pdev, data, size_data);
+                if (ret)
+                        goto err;
+        }
+
+        ret = platform_device_add(pdev);
+        if (ret) {
+err:
+                platform_device_put(pdev);
+                return ERR_PTR(ret);
+        }
+
+        return pdev;
+}
diff --git a/arch/arm/mach-mxs/devices/platform-duart.c b/arch/arm/mach-mxs/devices/platform-duart.c
new file mode 100644
index 000000000000..2fe0df5b0aad
--- /dev/null
+++ b/arch/arm/mach-mxs/devices/platform-duart.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2009-2010 Pengutronix
+ * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
+ *
+ * Copyright 2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License version 2 as published by the
+ * Free Software Foundation.
+ */
+#include <mach/mx23.h>
+#include <mach/mx28.h>
+#include <mach/devices-common.h>
+
+#define mxs_duart_data_entry(soc)                                       \
+        {                                                               \
+                .iobase = soc ## _DUART_BASE_ADDR,                      \
+                .irq = soc ## _INT_DUART,                               \
+        }
+
+#ifdef CONFIG_SOC_IMX23
+const struct mxs_duart_data mx23_duart_data __initconst =
+        mxs_duart_data_entry(MX23);
+#endif
+
+#ifdef CONFIG_SOC_IMX28
+const struct mxs_duart_data mx28_duart_data __initconst =
+        mxs_duart_data_entry(MX28);
+#endif
+
+struct platform_device *__init mxs_add_duart(
+                const struct mxs_duart_data *data)
+{
+        struct resource res[] = {
+                {
+                        .start = data->iobase,
+                        .end = data->iobase + SZ_8K - 1,
+                        .flags = IORESOURCE_MEM,
+                }, {
+                        .start = data->irq,
+                        .end = data->irq,
+                        .flags = IORESOURCE_IRQ,
+                },
+        };
+
+        return mxs_add_platform_device("mxs-duart", 0, res, ARRAY_SIZE(res),
+                                        NULL, 0);
+}
diff --git a/arch/arm/mach-mxs/include/mach/devices-common.h b/arch/arm/mach-mxs/include/mach/devices-common.h
new file mode 100644
index 000000000000..07b44392cfd3
--- /dev/null
+++ b/arch/arm/mach-mxs/include/mach/devices-common.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2009-2010 Pengutronix
+ * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License version 2 as published by the
+ * Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+
+struct platform_device *mxs_add_platform_device_dmamask(
+                const char *name, int id,
+                const struct resource *res, unsigned int num_resources,
+                const void *data, size_t size_data, u64 dmamask);
+
+static inline struct platform_device *mxs_add_platform_device(
+                const char *name, int id,
+                const struct resource *res, unsigned int num_resources,
+                const void *data, size_t size_data)
+{
+        return mxs_add_platform_device_dmamask(
+                        name, id, res, num_resources, data, size_data, 0);
+}
+
+/* duart */
+struct mxs_duart_data {
+        resource_size_t iobase;
+        resource_size_t iosize;
+        resource_size_t irq;
+};
+struct platform_device *__init mxs_add_duart(
+                const struct mxs_duart_data *data);