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drivers: video: ov2640: add clock rate control property

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Add Clock Rate Control property to OV2640 CMOS video sensor

Signed-off-by: Charles Dias <charlesdias.cd@outlook.com>
This commit is contained in:
Charles Dias 2024-04-25 14:30:45 -03:00 committed by Carles Cufí
parent 3cde0f7f18
commit fa19161527
2 changed files with 17 additions and 1 deletions
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4
drivers/video/ov2640.c
View file

@ -435,6 +435,7 @@ struct ov2640_config {
#if DT_INST_NODE_HAS_PROP(0, reset_gpios)
struct gpio_dt_spec reset_gpio;
#endif
uint8_t clock_rate_control;
};
struct ov2640_data {
@ -821,7 +822,7 @@ static int ov2640_set_resolution(const struct device *dev,
/* Set CLKRC */
ret |= ov2640_write_reg(&cfg->i2c, BANK_SEL, BANK_SEL_SENSOR);
ret |= ov2640_write_reg(&cfg->i2c, CLKRC, 0x87);
ret |= ov2640_write_reg(&cfg->i2c, CLKRC, cfg->clock_rate_control);
/* Write DSP input registers */
ov2640_write_all(dev, uxga_regs, ARRAY_SIZE(uxga_regs));
@ -1030,6 +1031,7 @@ static const struct ov2640_config ov2640_cfg_0 = {
#if DT_INST_NODE_HAS_PROP(0, reset_gpios)
.reset_gpio = GPIO_DT_SPEC_INST_GET(0, reset_gpios),
#endif
.clock_rate_control = DT_INST_PROP(0, clock_rate_control),
};
static struct ov2640_data ov2640_data_0;

14
dts/bindings/video/ovti,ov2640.yaml
View file

@ -12,4 +12,18 @@ properties:
The RESETn pin is asserted to disable the sensor causing a hard
reset. The sensor receives this as an active-low signal.
clock-rate-control:
type: int
default: 0x87
description: |
Define the value to the Clock Rate Control register. By changing
the system clock divide ratio and PLL, the frame rate and pixel
rate will change together.
Bit[7] Internal frequency doublers ON/OFF selection.
0: ON 1: OFF
Bit[6] Reserved
Bit[5:0] Clock divider.
CLK = XVCLK /(decimal value of CLKRC[5:0] + 1)
include: i2c-device.yaml