ebf7cda0f9
Use runtime PM functionality interfaced with hwmod enable/idle functions, to replace direct clock operations and sysconfig handling. Due to reset sequence, pm_runtime_[get|put]_sync must be used, to avoid possible operations with the module under reset. Because of this and given that the driver uses spin_locks to protect their critical sections, we must use pm_runtime_irq_safe in order for the runtime ops to be happy, otherwise might_sleep_if checks in runtime framework will complain. The remaining pm_runtime out of iommu_enable and iommu_disable corresponds to paths that can be accessed through debugfs, some of them doesn't work if the module is not enabled first, but in future if the mmu is idled withouth freeing, these are needed to debug. Signed-off-by: Omar Ramirez Luna <omar.luna@linaro.org> Tested-by: Ohad Ben-Cohen <ohad@wizery.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
/*
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* omap iommu: omap device registration
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*
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* Copyright (C) 2008-2009 Nokia Corporation
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*
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* Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/platform_data/iommu-omap.h>
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#include <plat/omap_hwmod.h>
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#include <plat/omap_device.h>
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static int __init omap_iommu_dev_init(struct omap_hwmod *oh, void *unused)
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{
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struct platform_device *pdev;
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struct iommu_platform_data *pdata;
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struct omap_mmu_dev_attr *a = (struct omap_mmu_dev_attr *)oh->dev_attr;
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static int i;
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pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return -ENOMEM;
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pdata->name = oh->name;
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pdata->nr_tlb_entries = a->nr_tlb_entries;
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pdata->da_start = a->da_start;
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pdata->da_end = a->da_end;
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if (oh->rst_lines_cnt == 1) {
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pdata->reset_name = oh->rst_lines->name;
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pdata->assert_reset = omap_device_assert_hardreset;
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pdata->deassert_reset = omap_device_deassert_hardreset;
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}
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pdev = omap_device_build("omap-iommu", i, oh, pdata, sizeof(*pdata),
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NULL, 0, 0);
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kfree(pdata);
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if (IS_ERR(pdev)) {
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pr_err("%s: device build err: %ld\n", __func__, PTR_ERR(pdev));
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return PTR_ERR(pdev);
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}
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i++;
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return 0;
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}
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static int __init omap_iommu_init(void)
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{
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return omap_hwmod_for_each_by_class("mmu", omap_iommu_dev_init, NULL);
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}
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/* must be ready before omap3isp is probed */
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subsys_initcall(omap_iommu_init);
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static void __exit omap_iommu_exit(void)
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{
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/* Do nothing */
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}
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module_exit(omap_iommu_exit);
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MODULE_AUTHOR("Hiroshi DOYU");
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MODULE_DESCRIPTION("omap iommu: omap device registration");
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MODULE_LICENSE("GPL v2");
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