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| author | Andre Przywara <andre.przywara@arm.com> | 2017-03-06 01:35:56 +0000 |
|---|---|---|
| committer | Philipp Zabel <p.zabel@pengutronix.de> | 2017-03-15 12:19:12 +0100 |
| commit | 11282a49b735ad7f4cea187de2b8dc5489343e4b (patch) | |
| tree | cf687c8ef0ae165befe0266bb59bb8f841c25fcc /drivers/reset | |
| parent | 627006820268f92b62b2bde486c76ccd0fadb671 (diff) | |
| download | linux-stable-11282a49b735ad7f4cea187de2b8dc5489343e4b.tar.gz linux-stable-11282a49b735ad7f4cea187de2b8dc5489343e4b.tar.bz2 linux-stable-11282a49b735ad7f4cea187de2b8dc5489343e4b.zip | |
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.c | 18 |
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); |