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https://github.com/edk2-porting/linux-next.git
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8d7cf8370d
The patch makes necessary changes on gpio-mxs as below to turn it into an upstanding gpio driver. * Clean up the gpio port definition stuff * Use readl/writel to replace mach-specific accessors __raw_readl/__raw_writel * Change mxs_gpio_init into mxs_gpio_probe function And it then migrates mach-mxs to the updated driver by adding corresponding platform devices. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
102 lines
2.5 KiB
C
102 lines
2.5 KiB
C
/*
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* Copyright 2008 Sascha Hauer, kernel@pengutronix.de
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/amba/bus.h>
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struct platform_device *__init mxs_add_platform_device_dmamask(
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const char *name, int id,
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const struct resource *res, unsigned int num_resources,
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const void *data, size_t size_data, u64 dmamask)
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{
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int ret = -ENOMEM;
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struct platform_device *pdev;
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pdev = platform_device_alloc(name, id);
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if (!pdev)
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goto err;
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if (dmamask) {
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/*
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* This memory isn't freed when the device is put,
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* I don't have a nice idea for that though. Conceptually
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* dma_mask in struct device should not be a pointer.
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* See http://thread.gmane.org/gmane.linux.kernel.pci/9081
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*/
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pdev->dev.dma_mask =
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kmalloc(sizeof(*pdev->dev.dma_mask), GFP_KERNEL);
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if (!pdev->dev.dma_mask)
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/* ret is still -ENOMEM; */
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goto err;
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*pdev->dev.dma_mask = dmamask;
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pdev->dev.coherent_dma_mask = dmamask;
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}
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if (res) {
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ret = platform_device_add_resources(pdev, res, num_resources);
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if (ret)
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goto err;
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}
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if (data) {
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ret = platform_device_add_data(pdev, data, size_data);
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if (ret)
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goto err;
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}
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ret = platform_device_add(pdev);
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if (ret) {
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err:
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if (dmamask)
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kfree(pdev->dev.dma_mask);
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platform_device_put(pdev);
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return ERR_PTR(ret);
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}
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return pdev;
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}
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int __init mxs_add_amba_device(const struct amba_device *dev)
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{
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struct amba_device *adev = kmalloc(sizeof(*adev), GFP_KERNEL);
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if (!adev) {
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pr_err("%s: failed to allocate memory", __func__);
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return -ENOMEM;
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}
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*adev = *dev;
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return amba_device_register(adev, &iomem_resource);
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}
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struct device mxs_apbh_bus = {
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.init_name = "mxs_apbh",
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.parent = &platform_bus,
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};
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static int __init mxs_device_init(void)
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{
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return device_register(&mxs_apbh_bus);
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}
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core_initcall(mxs_device_init);
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