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[media] nuvoton-cir: fix clearing wake fifo

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At least on NVT6779D clearing the wake fifo works in learning mode only
(although this condition is not mentioned in the chip spec).
Setting the clear fifo bit has no effect in wake up mode.
Even if clearing the wake fifo should work in wake up mode on other
chips this workaround doesn't hurt.
If needed the caller of nvt_clear_cir_wake_fifo has to take care
of locking.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Heiner Kallweit 2015-12-30 14:40:47 -02:00 committed by Mauro Carvalho Chehab
parent a17ede9ac1
commit e1a7d981cf
1 changed files with 9 additions and 1 deletions
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10
drivers/media/rc/nuvoton-cir.c
View file

@ -370,11 +370,19 @@ static void nvt_clear_cir_fifo(struct nvt_dev *nvt)
/* clear out the hardware's cir wake rx fifo */
static void nvt_clear_cir_wake_fifo(struct nvt_dev *nvt)
{
u8 val;
u8 val, config;
config = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRCON);
/* clearing wake fifo works in learning mode only */
nvt_cir_wake_reg_write(nvt, config & ~CIR_WAKE_IRCON_MODE0,
CIR_WAKE_IRCON);
val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON);
nvt_cir_wake_reg_write(nvt, val | CIR_WAKE_FIFOCON_RXFIFOCLR,
CIR_WAKE_FIFOCON);
nvt_cir_wake_reg_write(nvt, config, CIR_WAKE_IRCON);
}
/* clear out the hardware's cir tx fifo */