iommu/omap: Migrate to hwmod framework
Use hwmod data and device attributes to build and register an
omap device for iommu driver.
- Update the naming convention in isp module.
- Remove unneeded check for number of resources, as this is now
handled by omap_device and prevents driver from loading.
- Now unused, remove platform device and resource data, handling
of sysconfig register for softreset purposes, use default
latency structure.
- Use hwmod API for reset handling.
Signed-off-by: Omar Ramirez Luna <omar.luna@linaro.org>
Tested-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index f8082da..af9b4f3 100644
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -143,13 +143,23 @@
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;
+ 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;
+ }
+ }
+
clk_enable(obj->clk);
err = arch_iommu->enable(obj);
@@ -159,12 +169,18 @@
static void iommu_disable(struct omap_iommu *obj)
{
- if (!obj)
+ struct platform_device *pdev = to_platform_device(obj->dev);
+ struct iommu_platform_data *pdata = pdev->dev.platform_data;
+
+ if (!obj || !pdata)
return;
arch_iommu->disable(obj);
clk_disable(obj->clk);
+
+ if (pdata->assert_reset)
+ pdata->assert_reset(pdev, pdata->reset_name);
}
/*
@@ -926,9 +942,6 @@
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;
diff --git a/drivers/iommu/omap-iommu2.c b/drivers/iommu/omap-iommu2.c
index c020202..4a3a1c7 100644
--- a/drivers/iommu/omap-iommu2.c
+++ b/drivers/iommu/omap-iommu2.c
@@ -35,12 +35,8 @@
#define MMU_SYS_IDLE_SMART (2 << MMU_SYS_IDLE_SHIFT)
#define MMU_SYS_IDLE_MASK (3 << MMU_SYS_IDLE_SHIFT)
-#define MMU_SYS_SOFTRESET (1 << 1)
#define MMU_SYS_AUTOIDLE 1
-/* SYSSTATUS */
-#define MMU_SYS_RESETDONE 1
-
/* IRQSTATUS & IRQENABLE */
#define MMU_IRQ_MULTIHITFAULT (1 << 4)
#define MMU_IRQ_TABLEWALKFAULT (1 << 3)
@@ -97,7 +93,6 @@
static int omap2_iommu_enable(struct omap_iommu *obj)
{
u32 l, pa;
- unsigned long timeout;
if (!obj->iopgd || !IS_ALIGNED((u32)obj->iopgd, SZ_16K))
return -EINVAL;
@@ -106,20 +101,6 @@
if (!IS_ALIGNED(pa, SZ_16K))
return -EINVAL;
- iommu_write_reg(obj, MMU_SYS_SOFTRESET, MMU_SYSCONFIG);
-
- timeout = jiffies + msecs_to_jiffies(20);
- do {
- l = iommu_read_reg(obj, MMU_SYSSTATUS);
- if (l & MMU_SYS_RESETDONE)
- break;
- } while (!time_after(jiffies, timeout));
-
- if (!(l & MMU_SYS_RESETDONE)) {
- dev_err(obj->dev, "can't take mmu out of reset\n");
- return -ENODEV;
- }
-
l = iommu_read_reg(obj, MMU_REVISION);
dev_info(obj->dev, "%s: version %d.%d\n", obj->name,
(l >> 4) & 0xf, l & 0xf);
