#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
-#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/iommu.h>
#include <linux/omap-iommu.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/io.h>
+#include <linux/pm_runtime.h>
#include <asm/cacheflush.h>
static int iommu_enable(struct omap_iommu *obj)
{
int err;
+ struct platform_device *pdev = to_platform_device(obj->dev);
+ struct iommu_platform_data *pdata = pdev->dev.platform_data;
- if (!obj)
+ if (!obj || !pdata)
return -EINVAL;
if (!arch_iommu)
return -ENODEV;
- clk_enable(obj->clk);
+ if (pdata->deassert_reset) {
+ err = pdata->deassert_reset(pdev, pdata->reset_name);
+ if (err) {
+ dev_err(obj->dev, "deassert_reset failed: %d\n", err);
+ return err;
+ }
+ }
+
+ pm_runtime_get_sync(obj->dev);
err = arch_iommu->enable(obj);
- clk_disable(obj->clk);
return err;
}
static void iommu_disable(struct omap_iommu *obj)
{
- if (!obj)
- return;
+ struct platform_device *pdev = to_platform_device(obj->dev);
+ struct iommu_platform_data *pdata = pdev->dev.platform_data;
- clk_enable(obj->clk);
+ if (!obj || !pdata)
+ return;
arch_iommu->disable(obj);
- clk_disable(obj->clk);
+ pm_runtime_put_sync(obj->dev);
+
+ if (pdata->assert_reset)
+ pdata->assert_reset(pdev, pdata->reset_name);
}
/*
if (!obj || !obj->nr_tlb_entries || !e)
return -EINVAL;
- clk_enable(obj->clk);
+ pm_runtime_get_sync(obj->dev);
iotlb_lock_get(obj, &l);
if (l.base == obj->nr_tlb_entries) {
cr = iotlb_alloc_cr(obj, e);
if (IS_ERR(cr)) {
- clk_disable(obj->clk);
+ pm_runtime_put_sync(obj->dev);
return PTR_ERR(cr);
}
l.vict = l.base;
iotlb_lock_set(obj, &l);
out:
- clk_disable(obj->clk);
+ pm_runtime_put_sync(obj->dev);
return err;
}
int i;
struct cr_regs cr;
- clk_enable(obj->clk);
+ pm_runtime_get_sync(obj->dev);
for_each_iotlb_cr(obj, obj->nr_tlb_entries, i, cr) {
u32 start;
iommu_write_reg(obj, 1, MMU_FLUSH_ENTRY);
}
}
- clk_disable(obj->clk);
+ pm_runtime_put_sync(obj->dev);
if (i == obj->nr_tlb_entries)
dev_dbg(obj->dev, "%s: no page for %08x\n", __func__, da);
{
struct iotlb_lock l;
- clk_enable(obj->clk);
+ pm_runtime_get_sync(obj->dev);
l.base = 0;
l.vict = 0;
iommu_write_reg(obj, 1, MMU_GFLUSH);
- clk_disable(obj->clk);
+ pm_runtime_put_sync(obj->dev);
}
#if defined(CONFIG_OMAP_IOMMU_DEBUG) || defined(CONFIG_OMAP_IOMMU_DEBUG_MODULE)
if (!obj || !buf)
return -EINVAL;
- clk_enable(obj->clk);
+ pm_runtime_get_sync(obj->dev);
bytes = arch_iommu->dump_ctx(obj, buf, bytes);
- clk_disable(obj->clk);
+ pm_runtime_put_sync(obj->dev);
return bytes;
}
struct cr_regs tmp;
struct cr_regs *p = crs;
- clk_enable(obj->clk);
+ pm_runtime_get_sync(obj->dev);
iotlb_lock_get(obj, &saved);
for_each_iotlb_cr(obj, num, i, tmp) {
}
iotlb_lock_set(obj, &saved);
- clk_disable(obj->clk);
+ pm_runtime_put_sync(obj->dev);
return p - crs;
}
if (!obj->refcount)
return IRQ_NONE;
- clk_enable(obj->clk);
errs = iommu_report_fault(obj, &da);
- clk_disable(obj->clk);
if (errs == 0)
return IRQ_HANDLED;
/*
* OMAP Device MMU(IOMMU) detection
*/
-static int __devinit omap_iommu_probe(struct platform_device *pdev)
+static int omap_iommu_probe(struct platform_device *pdev)
{
int err = -ENODEV;
int irq;
struct resource *res;
struct iommu_platform_data *pdata = pdev->dev.platform_data;
- if (pdev->num_resources != 2)
- return -EINVAL;
-
obj = kzalloc(sizeof(*obj) + MMU_REG_SIZE, GFP_KERNEL);
if (!obj)
return -ENOMEM;
- obj->clk = clk_get(&pdev->dev, pdata->clk_name);
- if (IS_ERR(obj->clk))
- goto err_clk;
-
obj->nr_tlb_entries = pdata->nr_tlb_entries;
obj->name = pdata->name;
obj->dev = &pdev->dev;
goto err_irq;
platform_set_drvdata(pdev, obj);
+ pm_runtime_irq_safe(obj->dev);
+ pm_runtime_enable(obj->dev);
+
dev_info(&pdev->dev, "%s registered\n", obj->name);
return 0;
err_ioremap:
release_mem_region(res->start, resource_size(res));
err_mem:
- clk_put(obj->clk);
-err_clk:
kfree(obj);
return err;
}
-static int __devexit omap_iommu_remove(struct platform_device *pdev)
+static int omap_iommu_remove(struct platform_device *pdev)
{
int irq;
struct resource *res;
release_mem_region(res->start, resource_size(res));
iounmap(obj->regbase);
- clk_put(obj->clk);
+ pm_runtime_disable(obj->dev);
+
dev_info(&pdev->dev, "%s removed\n", obj->name);
kfree(obj);
return 0;
static struct platform_driver omap_iommu_driver = {
.probe = omap_iommu_probe,
- .remove = __devexit_p(omap_iommu_remove),
+ .remove = omap_iommu_remove,
.driver = {
.name = "omap-iommu",
},