diff options
| author | Heiner Kallweit <hkallweit1@gmail.com> | 2017-04-12 22:33:57 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-06-06 14:56:29 +0300 |
| commit | 137edc02e7f005ca2a7060b41968aa46a3b7b048 (patch) | |
| tree | 607f967c57f5372020ecaeadafa6d98b001d4653 /drivers/media/rc/meson-ir.c | |
| parent | 705aa578d408f669cd28d9de076ff14bc659371c (diff) | |
| download | linux-137edc02e7f005ca2a7060b41968aa46a3b7b048.tar.xz | |
[media] rc: meson-ir: use readl_relaxed in the interrupt handler
We don't need the memory barriers here and an interrupt handler should
be as fast as possible. Therefore switch to readl_relaxed.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/rc/meson-ir.c')
| -rw-r--r-- | drivers/media/rc/meson-ir.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c index 664c3efe1f8f..dfe9184e996c 100644 --- a/drivers/media/rc/meson-ir.c +++ b/drivers/media/rc/meson-ir.c @@ -85,16 +85,17 @@ static void meson_ir_set_mask(struct meson_ir *ir, unsigned int reg, static irqreturn_t meson_ir_irq(int irqno, void *dev_id) { struct meson_ir *ir = dev_id; - u32 duration; + u32 duration, status; DEFINE_IR_RAW_EVENT(rawir); spin_lock(&ir->lock); - duration = readl(ir->reg + IR_DEC_REG1); + duration = readl_relaxed(ir->reg + IR_DEC_REG1); duration = FIELD_GET(REG1_TIME_IV_MASK, duration); rawir.duration = US_TO_NS(duration * MESON_TRATE); - rawir.pulse = !!(readl(ir->reg + IR_DEC_STATUS) & STATUS_IR_DEC_IN); + status = readl_relaxed(ir->reg + IR_DEC_STATUS); + rawir.pulse = !!(status & STATUS_IR_DEC_IN); ir_raw_event_store_with_filter(ir->rc, &rawir); ir_raw_event_handle(ir->rc); |