From dc38ad4052a50b9e73fdcc970ecdd4f69ee9d97a Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Thu, 9 Dec 2010 23:12:46 +0800 Subject: [PATCH] ARM: mxs: Dynamically allocate duart devices MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Dynamically allocate duart devices for MX23 and MX28. Signed-off-by: Shawn Guo Signed-off-by: Uwe Kleine-König --- 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 ++++++++++++ .../mach-mxs/include/mach/devices-common.h | 34 +++++++++ 5 files changed, 189 insertions(+) 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 000000000000..d0f49fc0abb5 --- /dev/null +++ b/arch/arm/mach-mxs/devices-mx23.h @@ -0,0 +1,16 @@ +/* + * Copyright (C) 2010 Pengutronix + * Uwe Kleine-Koenig + * + * 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 +#include + +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 + * + * 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 +#include + +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 +#include +#include +#include +#include +#include + +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 + * + * 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 +#include +#include + +#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 + * + * 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 +#include +#include + +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); -- 2.39.5