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authorAndre Przywara <andre.przywara@arm.com>2017-03-06 01:35:56 +0000
committerPhilipp Zabel <p.zabel@pengutronix.de>2017-03-15 12:19:12 +0100
commit11282a49b735ad7f4cea187de2b8dc5489343e4b (patch)
treecf687c8ef0ae165befe0266bb59bb8f841c25fcc /drivers/reset
parent627006820268f92b62b2bde486c76ccd0fadb671 (diff)
reset: sunxi: fix for 64-bit compilation
The Allwinner reset controller has 32-bit registers, so translating the reset cell number into a register and bit offset should not use any architecture dependent data size. Otherwise this breaks for 64-bit architectures like arm64. Fix this by making it clear that it's the hardware register width which matters here in the calculation. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Acked-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Diffstat (limited to 'drivers/reset')
-rw-r--r--drivers/reset/reset-sunxi.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/reset/reset-sunxi.c b/drivers/reset/reset-sunxi.c
index b44f6b5f87b6..cd585cd2f04d 100644
--- a/drivers/reset/reset-sunxi.c
+++ b/drivers/reset/reset-sunxi.c
@@ -34,15 +34,16 @@ static int sunxi_reset_assert(struct reset_controller_dev *rcdev,
struct sunxi_reset_data *data = container_of(rcdev,
struct sunxi_reset_data,
rcdev);
- int bank = id / BITS_PER_LONG;
- int offset = id % BITS_PER_LONG;
+ int reg_width = sizeof(u32);
+ int bank = id / (reg_width * BITS_PER_BYTE);
+ int offset = id % (reg_width * BITS_PER_BYTE);
unsigned long flags;
u32 reg;
spin_lock_irqsave(&data->lock, flags);
- reg = readl(data->membase + (bank * 4));
- writel(reg & ~BIT(offset), data->membase + (bank * 4));
+ reg = readl(data->membase + (bank * reg_width));
+ writel(reg & ~BIT(offset), data->membase + (bank * reg_width));
spin_unlock_irqrestore(&data->lock, flags);
@@ -55,15 +56,16 @@ static int sunxi_reset_deassert(struct reset_controller_dev *rcdev,
struct sunxi_reset_data *data = container_of(rcdev,
struct sunxi_reset_data,
rcdev);
- int bank = id / BITS_PER_LONG;
- int offset = id % BITS_PER_LONG;
+ int reg_width = sizeof(u32);
+ int bank = id / (reg_width * BITS_PER_BYTE);
+ int offset = id % (reg_width * BITS_PER_BYTE);
unsigned long flags;
u32 reg;
spin_lock_irqsave(&data->lock, flags);
- reg = readl(data->membase + (bank * 4));
- writel(reg | BIT(offset), data->membase + (bank * 4));
+ reg = readl(data->membase + (bank * reg_width));
+ writel(reg | BIT(offset), data->membase + (bank * reg_width));
spin_unlock_irqrestore(&data->lock, flags);

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