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-rw-r--r--drivers/reset/reset-socfpga.c19
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/reset/reset-socfpga.c b/drivers/reset/reset-socfpga.c
index 0a8def35ea2e..1a6c5d66c83b 100644
--- a/drivers/reset/reset-socfpga.c
+++ b/drivers/reset/reset-socfpga.c
@@ -24,11 +24,11 @@
#include <linux/types.h>
#define NR_BANKS 4
-#define OFFSET_MODRST 0x10
struct socfpga_reset_data {
spinlock_t lock;
void __iomem *membase;
+ u32 modrst_offset;
struct reset_controller_dev rcdev;
};
@@ -45,8 +45,8 @@ static int socfpga_reset_assert(struct reset_controller_dev *rcdev,
spin_lock_irqsave(&data->lock, flags);
- reg = readl(data->membase + OFFSET_MODRST + (bank * NR_BANKS));
- writel(reg | BIT(offset), data->membase + OFFSET_MODRST +
+ reg = readl(data->membase + data->modrst_offset + (bank * NR_BANKS));
+ writel(reg | BIT(offset), data->membase + data->modrst_offset +
(bank * NR_BANKS));
spin_unlock_irqrestore(&data->lock, flags);
@@ -67,8 +67,8 @@ static int socfpga_reset_deassert(struct reset_controller_dev *rcdev,
spin_lock_irqsave(&data->lock, flags);
- reg = readl(data->membase + OFFSET_MODRST + (bank * NR_BANKS));
- writel(reg & ~BIT(offset), data->membase + OFFSET_MODRST +
+ reg = readl(data->membase + data->modrst_offset + (bank * NR_BANKS));
+ writel(reg & ~BIT(offset), data->membase + data->modrst_offset +
(bank * NR_BANKS));
spin_unlock_irqrestore(&data->lock, flags);
@@ -85,7 +85,7 @@ static int socfpga_reset_status(struct reset_controller_dev *rcdev,
int offset = id % BITS_PER_LONG;
u32 reg;
- reg = readl(data->membase + OFFSET_MODRST + (bank * NR_BANKS));
+ reg = readl(data->membase + data->modrst_offset + (bank * NR_BANKS));
return !(reg & BIT(offset));
}
@@ -100,6 +100,8 @@ static int socfpga_reset_probe(struct platform_device *pdev)
{
struct socfpga_reset_data *data;
struct resource *res;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
/*
* The binding was mainlined without the required property.
@@ -120,6 +122,11 @@ static int socfpga_reset_probe(struct platform_device *pdev)
if (IS_ERR(data->membase))
return PTR_ERR(data->membase);
+ if (of_property_read_u32(np, "altr,modrst-offset", &data->modrst_offset)) {
+ dev_warn(dev, "missing altr,modrst-offset property, assuming 0x10!\n");
+ data->modrst_offset = 0x10;
+ }
+
spin_lock_init(&data->lock);
data->rcdev.owner = THIS_MODULE;