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media: rc: ir-spi: fix duty cycle 

Calculate the pulse rather than having a few preset values.

Signed-off-by: Sean Young <sean@mess.org>
Acked-by: Andi Shyti <andi.shyti@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Sean Young 2018-01-27 09:05:37 -05:00 committed by Mauro Carvalho Chehab
parent de5b22d987
commit 069edf8a6a
1 changed files with 2 additions and 22 deletions
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24
drivers/media/rc/ir-spi.c
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@ -15,21 +15,11 @@
#define IR_SPI_DRIVER_NAME "ir-spi"
/* pulse value for different duty cycles */
#define IR_SPI_PULSE_DC_50 0xff00
#define IR_SPI_PULSE_DC_60 0xfc00
#define IR_SPI_PULSE_DC_70 0xf800
#define IR_SPI_PULSE_DC_75 0xf000
#define IR_SPI_PULSE_DC_80 0xc000
#define IR_SPI_PULSE_DC_90 0x8000
#define IR_SPI_DEFAULT_FREQUENCY 38000
#define IR_SPI_BIT_PER_WORD 8
#define IR_SPI_MAX_BUFSIZE 4096
struct ir_spi_data {
u32 freq;
u8 duty_cycle;
bool negated;
u16 tx_buf[IR_SPI_MAX_BUFSIZE];
@ -105,19 +95,9 @@ static int ir_spi_set_tx_carrier(struct rc_dev *dev, u32 carrier)
static int ir_spi_set_duty_cycle(struct rc_dev *dev, u32 duty_cycle)
{
struct ir_spi_data *idata = dev->priv;
int bits = (duty_cycle * 15) / 100;
if (duty_cycle >= 90)
idata->pulse = IR_SPI_PULSE_DC_90;
else if (duty_cycle >= 80)
idata->pulse = IR_SPI_PULSE_DC_80;
else if (duty_cycle >= 75)
idata->pulse = IR_SPI_PULSE_DC_75;
else if (duty_cycle >= 70)
idata->pulse = IR_SPI_PULSE_DC_70;
else if (duty_cycle >= 60)
idata->pulse = IR_SPI_PULSE_DC_60;
else
idata->pulse = IR_SPI_PULSE_DC_50;
idata->pulse = GENMASK(bits, 0);
if (idata->negated) {
idata->pulse = ~idata->pulse;