[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>
This commit is contained in:
Heiner Kallweit 2017-04-12 16:33:57 -03:00 committed by Mauro Carvalho Chehab
parent 705aa578d4
commit 137edc02e7

View file

@ -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);