Recent changes in hwmod now require for drivers to handle reset
lines. Otherwise iommu initialization will fail.
Signed-off-by: Omar Ramirez Luna <omar.luna@xxxxxxxxxx>
---
arch/arm/mach-omap2/omap-iommu.c | 6 ++++++
arch/arm/plat-omap/include/plat/iommu.h | 6 ++++++
drivers/iommu/omap-iommu.c | 20 ++++++++++++++++++--
3 files changed, 30 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-omap2/omap-iommu.c b/arch/arm/mach-omap2/omap-iommu.c
index 02d98ce..96eecd8 100644
--- a/arch/arm/mach-omap2/omap-iommu.c
+++ b/arch/arm/mach-omap2/omap-iommu.c
@@ -37,6 +37,12 @@ static int __init omap_iommu_dev_init(struct omap_hwmod *oh, void *unused)
pdata->da_start = a->da_start;
pdata->da_end = a->da_end;
+ if (oh->rst_lines_cnt == 1) {
+ pdata->reset_name = oh->rst_lines->name;
+ pdata->assert_reset = omap_device_assert_hardreset;
+ pdata->deassert_reset = omap_device_deassert_hardreset;
+ }
+
pdev = omap_device_build("omap-iommu", i, oh, pdata, sizeof(*pdata),
NULL, 0, 0);
diff --git a/arch/arm/plat-omap/include/plat/iommu.h b/arch/arm/plat-omap/include/plat/iommu.h
index ed56424..bb15b85 100644
--- a/arch/arm/plat-omap/include/plat/iommu.h
+++ b/arch/arm/plat-omap/include/plat/iommu.h
@@ -13,6 +13,8 @@
#ifndef __MACH_IOMMU_H
#define __MACH_IOMMU_H
+#include <linux/platform_device.h>
+
struct iotlb_entry {
u32 da;
u32 pa;
@@ -119,9 +121,13 @@ struct omap_mmu_dev_attr {
struct iommu_platform_data {
const char *name;
const char *clk_name;
+ const char *reset_name;
int nr_tlb_entries;
u32 da_start;
u32 da_end;
+
+ int (*assert_reset)(struct platform_device *pdev, const char *name);
+ int (*deassert_reset)(struct platform_device *pdev, const char *name);
};
/**
diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index 93d7d84..f0d6865 100644
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -125,13 +125,23 @@ EXPORT_SYMBOL_GPL(omap_iommu_arch_version);
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);
@@ -142,7 +152,10 @@ static int iommu_enable(struct omap_iommu *obj)
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;
clk_enable(obj->clk);
@@ -150,6 +163,9 @@ static void iommu_disable(struct omap_iommu *obj)
arch_iommu->disable(obj);
clk_disable(obj->clk);
+
+ if (pdata->assert_reset)
+ pdata->assert_reset(pdev, pdata->reset_name);
}
/*
--
1.7.4.1
--
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