[PATCH v2 11/15] ARM: mxs: Dynamically allocate duart devices
Shawn Guo
shawn.guo at freescale.com
Thu Dec 9 10:12:46 EST 2010
Dynamically allocate duart devices for MX23 and MX28.
Signed-off-by: Shawn Guo <shawn.guo at freescale.com>
---
Changes for v2:
- Change inclusion of hardware.h to mx23.h plus mx28.h
arch/arm/mach-mxs/devices-mx23.h | 16 +++++
arch/arm/mach-mxs/devices-mx28.h | 16 +++++
arch/arm/mach-mxs/devices.c | 75 +++++++++++++++++++++++
arch/arm/mach-mxs/devices/platform-duart.c | 48 ++++++++++++++
arch/arm/mach-mxs/include/mach/devices-common.h | 34 ++++++++++
5 files changed, 189 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-mxs/devices-mx23.h
create mode 100644 arch/arm/mach-mxs/devices-mx28.h
create mode 100644 arch/arm/mach-mxs/devices.c
create mode 100644 arch/arm/mach-mxs/devices/platform-duart.c
create mode 100644 arch/arm/mach-mxs/include/mach/devices-common.h
diff --git a/arch/arm/mach-mxs/devices-mx23.h b/arch/arm/mach-mxs/devices-mx23.h
new file mode 100644
index 0000000..d0f49fc
--- /dev/null
+++ b/arch/arm/mach-mxs/devices-mx23.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2010 Pengutronix
+ * Uwe Kleine-Koenig <u.kleine-koenig at 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 0000000..47c2f04
--- /dev/null
+++ b/arch/arm/mach-mxs/devices-mx28.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2010 Pengutronix
+ * Uwe Kleine-Koenig <u.kleine-koenig at 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 0000000..6b60f02
--- /dev/null
+++ b/arch/arm/mach-mxs/devices.c
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2008 Sascha Hauer, kernel at 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 0000000..2fe0df5
--- /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 at 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 0000000..07b4439
--- /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 at 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);
--
1.7.1
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