[PATCH 3/3] reset: socfpga: use readl/writel_relaxed

From: Philipp Zabel
Date: Tue Jul 05 2016 - 06:18:09 EST


This just removes the rmb()/wmb() pair between register read and
write. Since no relevant reads follow the rmb and no relevant writes
precede the wmb, they should be safe to remove.

Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
---
drivers/reset/reset-socfpga.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/reset/reset-socfpga.c b/drivers/reset/reset-socfpga.c
index 78ebf84..4a65128 100644
--- a/drivers/reset/reset-socfpga.c
+++ b/drivers/reset/reset-socfpga.c
@@ -44,8 +44,8 @@ static int socfpga_reset_assert(struct reset_controller_dev *rcdev,

spin_lock_irqsave(&data->lock, flags);

- reg = readl(data->membase + (bank * NR_BANKS));
- writel(reg | BIT(offset), data->membase + (bank * NR_BANKS));
+ reg = readl_relaxed(data->membase + (bank * NR_BANKS));
+ writel_relaxed(reg | BIT(offset), data->membase + (bank * NR_BANKS));
spin_unlock_irqrestore(&data->lock, flags);

return 0;
@@ -65,8 +65,8 @@ static int socfpga_reset_deassert(struct reset_controller_dev *rcdev,

spin_lock_irqsave(&data->lock, flags);

- reg = readl(data->membase + (bank * NR_BANKS));
- writel(reg & ~BIT(offset), data->membase + (bank * NR_BANKS));
+ reg = readl_relaxed(data->membase + (bank * NR_BANKS));
+ writel_relaxed(reg & ~BIT(offset), data->membase + (bank * NR_BANKS));

spin_unlock_irqrestore(&data->lock, flags);

--
2.8.1